# TERMINFO 5 File Formats

## NAME

           terminfo - terminal capability data base

## SYNOPSIS

           /usr/share/terminfo/*/*

## DESCRIPTION

           Terminfo  is  a  data  base  describing terminals, used by
           screen-oriented programs  such  as  nvi(1),  rogue(1)  and
           libraries  such  as curses(3x).  Terminfo describes termi-
           nals by giving a set of capabilities which they  have,  by
           specifying how to perform screen operations, and by speci-
           fying padding requirements and initialization sequences.

           Entries in terminfo consist of a sequence of `,' separated
           fields  (embedded  commas may be escaped with a  backslash
           or notated as \072).  White space after the `,'  separator
           is  ignored.   The first entry for each terminal gives the
           names which are known for the terminal, separated  by  `|'
           characters.   The  first  name  given  is  the most common
           abbreviation for the terminal, the last name given  should
           be  a  long  name  fully identifying the terminal, and all
           others are understood as synonyms for the  terminal  name.
           All names but the last should be in lower case and contain
           no blanks; the last name may well contain upper  case  and
           blanks for readability.

           Terminal names (except for the last, verbose entry) should
           be chosen using the following conventions.  The particular
           piece  of  hardware  making  up the terminal should have a
           root name, thus ``hp2621''.  This name should not  contain
           hyphens.  Modes that the hardware can be in, or user pref-
           erences, should be indicated by appending a hyphen  and  a
           mode  suffix.   Thus,  a vt100 in 132 column mode would be
           vt100-w.  The following suffixes should be used where pos-
           sible:

          Suffix                  Meaning                   Example
          -nn      Number of lines on the screen            aaa-60
          -np      Number of pages of memory                c100-4p
          -am      With automargins (usually the default)   vt100-am
          -m       Mono mode; suppress color                ansi-m
          -mc      Magic cookie; spaces when highlighting   wy30-mc
          -na      No arrow keys (leave them in local)      c100-na
          -nam     Without automatic margins                vt100-nam
          -nl      No status line                           att4415-nl
          -ns      No status line                           hp2626-ns
          -rv      Reverse video                            c100-rv
          -s       Enable status line                       vt100-s
          -vb      Use visible bell instead of beep         wy370-vb
          -w       Wide mode (> 80 columns, usually 132)    vt100-w

           For  more  on terminal naming conventions, see the term(7)
           manual page.

       Capabilities
           The following is a  complete  table  of  the  capabilities
           included  in a terminfo description block and available to
           terminfo-using code.  In each line of the table,

           The variable is the name by which the programmer  (at  the
           terminfo level) accesses the capability.

           The  capname  is  the  short  name used in the text of the
           database, and is used by a person updating  the  database.
           Whenever  possible,  capnames are chosen to be the same as
           or similar to the ANSI X3.64-1979 standard (now superseded
           by  ECMA-48,  which uses identical or very similar names).
           Semantics are also intended to match those of the specifi-
           cation.

           The  termcap code is the old termcap capability name (some
           capabilities are new, and have names which termcap did not
           originate).

           Capability  names have no hard length limit, but an infor-
           mal limit of 5 characters has been adopted  to  keep  them
           short  and  to  allow  the tabs in the source file Caps to
           line up nicely.

           Finally, the description  field  attempts  to  convey  the
           semantics  of  the capability.  You may find some codes in
           the description field:

           (P)    indicates that padding may be specified

           #[1-9] in the description field indicates that the  string
                  is passed through tparm with parms as given (#i).

           (P*)   indicates  that  padding  may vary in proportion to
                  the number of lines affected

           (#i)   indicates the ith parameter.

           These are the boolean capabilities:

                   Variable          Cap-  TCap      Description
                   Booleans          name  Code
           auto_left_margin          bw    bw    cub1 wraps from col-
                                                 umn 0 to last column
           auto_right_margin         am    am    terminal has auto-
                                                 matic margins
           back_color_erase          bce   ut    screen erased with
                                                 background color
           can_change                ccc   cc    terminal can re-
                                                 define existing col-
                                                 ors

           ceol_standout_glitch      xhp   xs    standout not erased
                                                 by overwriting (hp)
           col_addr_glitch           xhpa  YA    only positive motion
                                                 for hpa/mhpa caps
           cpi_changes_res           cpix  YF    changing character
                                                 pitch changes reso-
                                                 lution
           cr_cancels_micro_mode     crxm  YB    using cr turns off
                                                 micro mode
           dest_tabs_magic_smso      xt    xt    tabs destructive,
                                                 magic so char
                                                 (t1061)
           eat_newline_glitch        xenl  xn    newline ignored
                                                 after 80 cols (con-
                                                 cept)
           erase_overstrike          eo    eo    can erase over-
                                                 strikes with a blank
           generic_type              gn    gn    generic line type
           hard_copy                 hc    hc    hardcopy terminal
           hard_cursor               chts  HC    cursor is hard to
                                                 see
           has_meta_key              km    km    Has a meta key
                                                 (i.e., sets 8th-bit)
           has_print_wheel           daisy YC    printer needs opera-
                                                 tor to change char-
                                                 acter set
           has_status_line           hs    hs    has extra status
                                                 line
           hue_lightness_saturation  hls   hl    terminal uses only
                                                 HLS color notation
                                                 (Tektronix)
           insert_null_glitch        in    in    insert mode distin-
                                                 guishes nulls
           lpi_changes_res           lpix  YG    changing line pitch
                                                 changes resolution
           memory_above              da    da    display may be
                                                 retained above the
                                                 screen
           memory_below              db    db    display may be
                                                 retained below the
                                                 screen
           move_insert_mode          mir   mi    safe to move while
                                                 in insert mode
           move_standout_mode        msgr  ms    safe to move while
                                                 in standout mode
           needs_xon_xoff            nxon  nx    padding won't work,
                                                 xon/xoff required
           no_esc_ctlc               xsb   xb    beehive (f1=escape,
                                                 f2=ctrl C)
           no_pad_char               npc   NP    pad character does
                                                 not exist
           non_dest_scroll_region    ndscr ND    scrolling region is
                                                 non-destructive

           non_rev_rmcup             nrrmc NR    smcup does not
                                                 reverse rmcup
           over_strike               os    os    terminal can over-
                                                 strike
           prtr_silent               mc5i  5i    printer won't echo
                                                 on screen
           row_addr_glitch           xvpa  YD    only positive motion
                                                 for vpa/mvpa caps
           semi_auto_right_margin    sam   YE    printing in last
                                                 column causes cr
           status_line_esc_ok        eslok es    escape can be used
                                                 on the status line
           tilde_glitch              hz    hz    can't print ~'s
                                                 (hazeltine)
           transparent_underline     ul    ul    underline character
                                                 overstrikes
           xon_xoff                  xon   xo    terminal uses
                                                 xon/xoff handshaking

           These are the numeric capabilities:

                Variable         Cap-     TCap       Description
                 Numeric         name     Code
           columns               cols     co     number of columns in
                                                 a line
           init_tabs             it       it     tabs initially every
                                                 # spaces
           label_height          lh       lh     rows in each label
           label_width           lw       lw     columns in each
                                                 label
           lines                 lines    li     number of lines on
                                                 screen or page
           lines_of_memory       lm       lm     lines of memory if >
                                                 line. 0 means varies
           magic_cookie_glitch   xmc      sg     number of blank
                                                 characters left by
                                                 smso or rmso
           max_attributes        ma       ma     maximum combined
                                                 attributes terminal
                                                 can handle
           max_colors            colors   Co     maximum number of
                                                 colors on screen
           max_pairs             pairs    pa     maximum number of
                                                 color-pairs on the
                                                 screen
           maximum_windows       wnum     MW     maximum number of
                                                 defineable windows
           no_color_video        ncv      NC     video attributes
                                                 that can't be used
                                                 with colors
           num_labels            nlab     Nl     number of labels on
                                                 screen

           padding_baud_rate     pb       pb     lowest baud rate
                                                 where padding needed
           virtual_terminal      vt       vt     virtual terminal
                                                 number (CB/unix)
           width_status_line     wsl      ws     number of columns in
                                                 status line

           The following numeric  capabilities  are  present  in  the
           SVr4.0  term  structure, but are not yet documented in the
           man page.  They came in with SVr4's printer support.

                 Variable         Cap-    TCap       Description
                 Numeric          name    Code
           bit_image_entwining    bitwin  Yo     number of passes for
                                                 each bit-image row
           bit_image_type         bitype  Yp     type of bit-image
                                                 device
           buffer_capacity        bufsz   Ya     numbers of bytes
                                                 buffered before
                                                 printing
           buttons                btns    BT     number of buttons on
                                                 mouse
           dot_horz_spacing       spinh   Yc     spacing of dots hor-
                                                 izontally in dots
                                                 per inch
           dot_vert_spacing       spinv   Yb     spacing of pins ver-
                                                 tically in pins per
                                                 inch
           max_micro_address      maddr   Yd     maximum value in
                                                 micro_..._address
           max_micro_jump         mjump   Ye     maximum value in
                                                 parm_..._micro
           micro_col_size         mcs     Yf     character step size
                                                 when in micro mode
           micro_line_size        mls     Yg     line step size when
                                                 in micro mode
           number_of_pins         npins   Yh     numbers of pins in
                                                 print-head
           output_res_char        orc     Yi     horizontal resolu-
                                                 tion in units per
                                                 line
           output_res_horz_inch   orhi    Yk     horizontal resolu-
                                                 tion in units per
                                                 inch
           output_res_line        orl     Yj     vertical resolution
                                                 in units per line
           output_res_vert_inch   orvi    Yl     vertical resolution
                                                 in units per inch
           print_rate             cps     Ym     print rate in char-
                                                 acters per second
           wide_char_size         widcs   Yn     character step size
                                                 when in double wide
                                                 mode

           These are the string capabilities:

                   Variable          Cap-   TCap     Description
                    String           name   Code
           acs_chars                 acsc   ac   graphics charset
                                                 pairs, based on
                                                 vt100
           back_tab                  cbt    bt   back tab (P)
           bell                      bel    bl   audible signal
                                                 (bell) (P)
           carriage_return           cr     cr   carriage return (P*)
                                                 (P*)
           change_char_pitch         cpi    ZA   Change number of
                                                 characters per inch
                                                 to #1
           change_line_pitch         lpi    ZB   Change number of
                                                 lines per inch to #1
           change_res_horz           chr    ZC   Change horizontal
                                                 resolution to #1
           change_res_vert           cvr    ZD   Change vertical res-
                                                 olution to #1
           change_scroll_region      csr    cs   change region to
                                                 line #1 to line #2
                                                 (P)
           char_padding              rmp    rP   like ip but when in
                                                 insert mode
           clear_all_tabs            tbc    ct   clear all tab stops
                                                 (P)
           clear_margins             mgc    MC   clear right and left
                                                 soft margins
           clear_screen              clear  cl   clear screen and
                                                 home cursor (P*)
           clr_bol                   el1    cb   Clear to beginning
                                                 of line
           clr_eol                   el     ce   clear to end of line
                                                 (P)
           clr_eos                   ed     cd   clear to end of
                                                 screen (P*)
           column_address            hpa    ch   horizontal position
                                                 #1, absolute (P)
           command_character         cmdch  CC   terminal settable
                                                 cmd character in
                                                 prototype !?
           create_window             cwin   CW   define a window #1
                                                 from #2,#3 to #4,#5
           cursor_address            cup    cm   move to row #1
                                                 columns #2
           cursor_down               cud1   do   down one line
           cursor_home               home   ho   home cursor (if no
                                                 cup)
           cursor_invisible          civis  vi   make cursor invisi-
                                                 ble
           cursor_left               cub1   le   move left one space

           cursor_mem_address        mrcup  CM   memory relative cur-
                                                 sor addressing, move
                                                 to row #1 columns #2
           cursor_normal             cnorm  ve   make cursor appear
                                                 normal (undo
                                                 civis/cvvis)
           cursor_right              cuf1   nd   non-destructive
                                                 space (move right
                                                 one space)
           cursor_to_ll              ll     ll   last line, first
                                                 column (if no cup)
           cursor_up                 cuu1   up   up one line
           cursor_visible            cvvis  vs   make cursor very
                                                 visible
           define_char               defc   ZE   Define a character
                                                 #1, #2 dots wide,
                                                 descender #3
           delete_character          dch1   dc   delete character
                                                 (P*)
           delete_line               dl1    dl   delete line (P*)
           dial_phone                dial   DI   dial number #1
           dis_status_line           dsl    ds   disable status line
           display_clock             dclk   DK   display clock
           down_half_line            hd     hd   half a line down
           ena_acs                   enacs  eA   enable alternate
                                                 char set
           enter_alt_charset_mode    smacs  as   start alternate
                                                 character set (P)
           enter_am_mode             smam   SA   turn on automatic
                                                 margins
           enter_blink_mode          blink  mb   turn on blinking
           enter_bold_mode           bold   md   turn on bold (extra
                                                 bright) mode
           enter_ca_mode             smcup  ti   string to start pro-
                                                 grams using cup
           enter_delete_mode         smdc   dm   enter delete mode
           enter_dim_mode            dim    mh   turn on half-bright
                                                 mode
           enter_doublewide_mode     swidm  ZF   Enter double-wide
                                                 mode
           enter_draft_quality       sdrfq  ZG   Enter draft-quality
                                                 mode
           enter_insert_mode         smir   im   enter insert mode
           enter_italics_mode        sitm   ZH   Enter italic mode
           enter_leftward_mode       slm    ZI   Start leftward car-
                                                 riage motion
           enter_micro_mode          smicm  ZJ   Start micro-motion
                                                 mode
           enter_near_letter_quality snlq   ZK   Enter NLQ mode
           enter_normal_quality      snrmq  ZL   Enter normal-quality
                                                 mode
           enter_protected_mode      prot   mp   turn on protected
                                                 mode

           enter_reverse_mode        rev    mr   turn on reverse
                                                 video mode
           enter_secure_mode         invis  mk   turn on blank mode
                                                 (characters invisi-
                                                 ble)
           enter_shadow_mode         sshm   ZM   Enter shadow-print
                                                 mode
           enter_standout_mode       smso   so   begin standout mode
           enter_subscript_mode      ssubm  ZN   Enter subscript mode
           enter_superscript_mode    ssupm  ZO   Enter superscript
                                                 mode
           enter_underline_mode      smul   us   begin underline mode
           enter_upward_mode         sum    ZP   Start upward car-
                                                 riage motion
           enter_xon_mode            smxon  SX   turn on xon/xoff
                                                 handshaking
           erase_chars               ech    ec   erase #1 characters
                                                 (P)
           exit_alt_charset_mode     rmacs  ae   end alternate char-
                                                 acter set (P)
           exit_am_mode              rmam   RA   turn off automatic
                                                 margins
           exit_attribute_mode       sgr0   me   turn off all
                                                 attributes
           exit_ca_mode              rmcup  te   strings to end pro-
                                                 grams using cup
           exit_delete_mode          rmdc   ed   end delete mode
           exit_doublewide_mode      rwidm  ZQ   End double-wide mode
           exit_insert_mode          rmir   ei   exit insert mode
           exit_italics_mode         ritm   ZR   End italic mode
           exit_leftward_mode        rlm    ZS   End left-motion mode
           exit_micro_mode           rmicm  ZT   End micro-motion
                                                 mode
           exit_shadow_mode          rshm   ZU   End shadow-print
                                                 mode
           exit_standout_mode        rmso   se   exit standout mode
           exit_subscript_mode       rsubm  ZV   End subscript mode
           exit_superscript_mode     rsupm  ZW   End superscript mode
           exit_underline_mode       rmul   ue   exit underline mode
           exit_upward_mode          rum    ZX   End reverse charac-
                                                 ter motion
           exit_xon_mode             rmxon  RX   turn off xon/xoff
                                                 handshaking
           fixed_pause               pause  PA   pause for 2-3 sec-
                                                 onds
           flash_hook                hook   fh   flash switch hook
           flash_screen              flash  vb   visible bell (may
                                                 not move cursor)
           form_feed                 ff     ff   hardcopy terminal
                                                 page eject (P*)
           from_status_line          fsl    fs   return from status
                                                 line
           goto_window               wingo  WG   go to window #1

           hangup                    hup    HU   hang-up phone
           init_1string              is1    i1   initialization
                                                 string
           init_2string              is2    is   initialization
                                                 string
           init_3string              is3    i3   initialization
                                                 string
           init_file                 if     if   name of initializa-
                                                 tion file
           init_prog                 iprog  iP   path name of program
                                                 for initialization
           initialize_color          initc  Ic   initialize color #1
                                                 to (#2,#3,#4)
           initialize_pair           initp  Ip   Initialize color
                                                 pair #1 to
                                                 fg=(#2,#3,#4),
                                                 bg=(#5,#6,#7)
           insert_character          ich1   ic   insert character (P)
           insert_line               il1    al   insert line (P*)
           insert_padding            ip     ip   insert padding after
                                                 inserted character
           key_a1                    ka1    K1   upper left of keypad
           key_a3                    ka3    K3   upper right of key-
                                                 pad
           key_b2                    kb2    K2   center of keypad
           key_backspace             kbs    kb   backspace key
           key_beg                   kbeg   @1   begin key
           key_btab                  kcbt   kB   back-tab key
           key_c1                    kc1    K4   lower left of keypad
           key_c3                    kc3    K5   lower right of key-
                                                 pad
           key_cancel                kcan   @2   cancel key
           key_catab                 ktbc   ka   clear-all-tabs key
           key_clear                 kclr   kC   clear-screen or
                                                 erase key
           key_close                 kclo   @3   close key
           key_command               kcmd   @4   command key
           key_copy                  kcpy   @5   copy key
           key_create                kcrt   @6   create key
           key_ctab                  kctab  kt   clear-tab key
           key_dc                    kdch1  kD   delete-character key
           key_dl                    kdl1   kL   delete-line key
           key_down                  kcud1  kd   down-arrow key
           key_eic                   krmir  kM   sent by rmir or smir
                                                 in insert mode
           key_end                   kend   @7   end key
           key_enter                 kent   @8   enter/send key
           key_eol                   kel    kE   clear-to-end-of-line
                                                 key
           key_eos                   ked    kS   clear-to-end-of-
                                                 screen key
           key_exit                  kext   @9   exit key
           key_f0                    kf0    k0   F0 function key

           key_f1                    kf1    k1   F1 function key
           key_f10                   kf10   k;   F10 function key
           key_f11                   kf11   F1   F11 function key
           key_f12                   kf12   F2   F12 function key
           key_f13                   kf13   F3   F13 function key
           key_f14                   kf14   F4   F14 function key
           key_f15                   kf15   F5   F15 function key
           key_f16                   kf16   F6   F16 function key
           key_f17                   kf17   F7   F17 function key
           key_f18                   kf18   F8   F18 function key
           key_f19                   kf19   F9   F19 function key
           key_f2                    kf2    k2   F2 function key
           key_f20                   kf20   FA   F20 function key
           key_f21                   kf21   FB   F21 function key
           key_f22                   kf22   FC   F22 function key
           key_f23                   kf23   FD   F23 function key
           key_f24                   kf24   FE   F24 function key
           key_f25                   kf25   FF   F25 function key
           key_f26                   kf26   FG   F26 function key
           key_f27                   kf27   FH   F27 function key
           key_f28                   kf28   FI   F28 function key
           key_f29                   kf29   FJ   F29 function key
           key_f3                    kf3    k3   F3 function key
           key_f30                   kf30   FK   F30 function key
           key_f31                   kf31   FL   F31 function key
           key_f32                   kf32   FM   F32 function key
           key_f33                   kf33   FN   F33 function key
           key_f34                   kf34   FO   F34 function key
           key_f35                   kf35   FP   F35 function key
           key_f36                   kf36   FQ   F36 function key
           key_f37                   kf37   FR   F37 function key
           key_f38                   kf38   FS   F38 function key
           key_f39                   kf39   FT   F39 function key
           key_f4                    kf4    k4   F4 function key
           key_f40                   kf40   FU   F40 function key
           key_f41                   kf41   FV   F41 function key
           key_f42                   kf42   FW   F42 function key
           key_f43                   kf43   FX   F43 function key
           key_f44                   kf44   FY   F44 function key
           key_f45                   kf45   FZ   F45 function key
           key_f46                   kf46   Fa   F46 function key
           key_f47                   kf47   Fb   F47 function key
           key_f48                   kf48   Fc   F48 function key
           key_f49                   kf49   Fd   F49 function key
           key_f5                    kf5    k5   F5 function key
           key_f50                   kf50   Fe   F50 function key
           key_f51                   kf51   Ff   F51 function key
           key_f52                   kf52   Fg   F52 function key
           key_f53                   kf53   Fh   F53 function key
           key_f54                   kf54   Fi   F54 function key
           key_f55                   kf55   Fj   F55 function key
           key_f56                   kf56   Fk   F56 function key
           key_f57                   kf57   Fl   F57 function key

           key_f58                   kf58   Fm   F58 function key
           key_f59                   kf59   Fn   F59 function key
           key_f6                    kf6    k6   F6 function key
           key_f60                   kf60   Fo   F60 function key
           key_f61                   kf61   Fp   F61 function key
           key_f62                   kf62   Fq   F62 function key
           key_f63                   kf63   Fr   F63 function key
           key_f7                    kf7    k7   F7 function key
           key_f8                    kf8    k8   F8 function key
           key_f9                    kf9    k9   F9 function key
           key_find                  kfnd   @0   find key
           key_help                  khlp   %1   help key
           key_home                  khome  kh   home key
           key_ic                    kich1  kI   insert-character key
           key_il                    kil1   kA   insert-line key
           key_left                  kcub1  kl   left-arrow key
           key_ll                    kll    kH   lower-left key (home
                                                 down)
           key_mark                  kmrk   %2   mark key
           key_message               kmsg   %3   message key
           key_move                  kmov   %4   move key
           key_next                  knxt   %5   next key
           key_npage                 knp    kN   next-page key
           key_open                  kopn   %6   open key
           key_options               kopt   %7   options key
           key_ppage                 kpp    kP   previous-page key
           key_previous              kprv   %8   previous key
           key_print                 kprt   %9   print key
           key_redo                  krdo   %0   redo key
           key_reference             kref   &1   reference key
           key_refresh               krfr   &2   refresh key
           key_replace               krpl   &3   replace key
           key_restart               krst   &4   restart key
           key_resume                kres   &5   resume key
           key_right                 kcuf1  kr   right-arrow key
           key_save                  ksav   &6   save key
           key_sbeg                  kBEG   &9   shifted begin key
           key_scancel               kCAN   &0   shifted cancel key
           key_scommand              kCMD   *1   shifted command key
           key_scopy                 kCPY   *2   shifted copy key
           key_screate               kCRT   *3   shifted create key
           key_sdc                   kDC    *4   shifted delete-char-
                                                 acter key
           key_sdl                   kDL    *5   shifted delete-line
                                                 key
           key_select                kslt   *6   select key
           key_send                  kEND   *7   shifted end key
           key_seol                  kEOL   *8   shifted clear-to-
                                                 end-of-line key
           key_sexit                 kEXT   *9   shifted exit key
           key_sf                    kind   kF   scroll-forward key
           key_sfind                 kFND   *0   shifted find key
           key_shelp                 kHLP   #1   shifted help key

           key_shome                 kHOM   #2   shifted home key
           key_sic                   kIC    #3   shifted insert-char-
                                                 acter key
           key_sleft                 kLFT   #4   shifted left-arrow
                                                 key
           key_smessage              kMSG   %a   shifted message key
           key_smove                 kMOV   %b   shifted move key
           key_snext                 kNXT   %c   shifted next key
           key_soptions              kOPT   %d   shifted options key
           key_sprevious             kPRV   %e   shifted previous key
           key_sprint                kPRT   %f   shifted print key
           key_sr                    kri    kR   scroll-backward key
           key_sredo                 kRDO   %g   shifted redo key
           key_sreplace              kRPL   %h   shifted replace key
           key_sright                kRIT   %i   shifted right-arrow
                                                 key
           key_srsume                kRES   %j   shifted resume key
           key_ssave                 kSAV   !1   shifted save key
           key_ssuspend              kSPD   !2   shifted suspend key
           key_stab                  khts   kT   set-tab key
           key_sundo                 kUND   !3   shifted undo key
           key_suspend               kspd   &7   suspend key
           key_undo                  kund   &8   undo key
           key_up                    kcuu1  ku   up-arrow key
           keypad_local              rmkx   ke   leave 'key-
                                                 board_transmit' mode
           keypad_xmit               smkx   ks   enter 'key-
                                                 board_transmit' mode
           lab_f0                    lf0    l0   label on function
                                                 key f0 if not f0
           lab_f1                    lf1    l1   label on function
                                                 key f1 if not f1
           lab_f10                   lf10   la   label on function
                                                 key f10 if not f10
           lab_f2                    lf2    l2   label on function
                                                 key f2 if not f2
           lab_f3                    lf3    l3   label on function
                                                 key f3 if not f3
           lab_f4                    lf4    l4   label on function
                                                 key f4 if not f4
           lab_f5                    lf5    l5   label on function
                                                 key f5 if not f5
           lab_f6                    lf6    l6   label on function
                                                 key f6 if not f6
           lab_f7                    lf7    l7   label on function
                                                 key f7 if not f7
           lab_f8                    lf8    l8   label on function
                                                 key f8 if not f8
           lab_f9                    lf9    l9   label on function
                                                 key f9 if not f9
           label_format              fln    Lf   label format
           label_off                 rmln   LF   turn off soft labels
           label_on                  smln   LO   turn on soft labels

           meta_off                  rmm    mo   turn off meta mode
           meta_on                   smm    mm   turn on meta mode
                                                 (8th-bit on)
           micro_column_address      mhpa   ZY   Like column_address
                                                 in micro mode
           micro_down                mcud1  ZZ   Like cursor_down in
                                                 micro mode
           micro_left                mcub1  Za   Like cursor_left in
                                                 micro mode
           micro_right               mcuf1  Zb   Like cursor_right in
                                                 micro mode
           micro_row_address         mvpa   Zc   Like row_address #1
                                                 in micro mode
           micro_up                  mcuu1  Zd   Like cursor_up in
                                                 micro mode
           newline                   nel    nw   newline (behave like
                                                 cr followed by lf)
           order_of_pins             porder Ze   Match software bits
                                                 to print-head pins
           orig_colors               oc     oc   Set all color pairs
                                                 to the original ones
           orig_pair                 op     op   Set default pair to
                                                 its original value
           pad_char                  pad    pc   padding char
                                                 (instead of null)
           parm_dch                  dch    DC   delete #1 characters
                                                 (P*)
           parm_delete_line          dl     DL   delete #1 lines (P*)
           parm_down_cursor          cud    DO   down #1 lines (P*)
           parm_down_micro           mcud   Zf   Like parm_down_cur-
                                                 sor in micro mode
           parm_ich                  ich    IC   insert #1 characters
                                                 (P*)
           parm_index                indn   SF   scroll forward #1
                                                 lines (P)
           parm_insert_line          il     AL   insert #1 lines (P*)
           parm_left_cursor          cub    LE   move #1 characters
                                                 to the left (P)
           parm_left_micro           mcub   Zg   Like parm_left_cur-
                                                 sor in micro mode
           parm_right_cursor         cuf    RI   move #1 characters
                                                 to the right (P*)
           parm_right_micro          mcuf   Zh   Like parm_right_cur-
                                                 sor in micro mode
           parm_rindex               rin    SR   scroll back #1 lines
                                                 (P)
           parm_up_cursor            cuu    UP   up #1 lines (P*)
           parm_up_micro             mcuu   Zi   Like parm_up_cursor
                                                 in micro mode
           pkey_key                  pfkey  pk   program function key
                                                 #1 to type string #2

           pkey_local                pfloc  pl   program function key
                                                 #1 to execute string
                                                 #2
           pkey_xmit                 pfx    px   program function key
                                                 #1 to transmit
                                                 string #2
           plab_norm                 pln    pn   program label #1 to
                                                 show string #2
           print_screen              mc0    ps   print contents of
                                                 screen
           prtr_non                  mc5p   pO   turn on printer for
                                                 #1 bytes
           prtr_off                  mc4    pf   turn off printer
           prtr_on                   mc5    po   turn on printer
           pulse                     pulse  PU   select pulse dialing
           quick_dial                qdial  QD   dial number #1 with-
                                                 out checking
           remove_clock              rmclk  RC   remove clock
           repeat_char               rep    rp   repeat char #1 #2
                                                 times (P*)
           req_for_input             rfi    RF   send next input char
                                                 (for ptys)
           reset_1string             rs1    r1   reset string
           reset_2string             rs2    r2   reset string
           reset_3string             rs3    r3   reset string
           reset_file                rf     rf   name of reset file
           restore_cursor            rc     rc   restore cursor to
                                                 position of last
                                                 save_cursor
           row_address               vpa    cv   vertical position #1
                                                 absolute (P)
           save_cursor               sc     sc   save current cursor
                                                 position (P)
           scroll_forward            ind    sf   scroll text up (P)
           scroll_reverse            ri     sr   scroll text down (P)
           select_char_set           scs    Zj   Select character
                                                 set, #1
           set_attributes            sgr    sa   define video
                                                 attributes #1-#9
                                                 (PG9)
           set_background            setb   Sb   Set background color
                                                 #1
           set_bottom_margin         smgb   Zk   Set bottom margin at
                                                 current line
           set_bottom_margin_parm    smgbp  Zl   Set bottom margin at
                                                 line #1 or (if smgtp
                                                 is not given) #2
                                                 lines from bottom
           set_clock                 sclk   SC   set clock, #1 hrs #2
                                                 mins #3 secs
           set_color_pair            scp    sp   Set current color
                                                 pair to #1

           set_foreground            setf   Sf   Set foreground color
                                                 #1
           set_left_margin           smgl   ML   set left soft margin
                                                 at current column.
                                                 See smgl. (ML is not
                                                 in BSD termcap).
           set_left_margin_parm      smglp  Zm   Set left (right)
                                                 margin at column #1
           set_right_margin          smgr   MR   set right soft mar-
                                                 gin at current col-
                                                 umn
           set_right_margin_parm     smgrp  Zn   Set right margin at
                                                 column #1
           set_tab                   hts    st   set a tab in every
                                                 row, current columns
           set_top_margin            smgt   Zo   Set top margin at
                                                 current line
           set_top_margin_parm       smgtp  Zp   Set top (bottom)
                                                 margin at row #1
           set_window                wind   wi   current window is
                                                 lines #1-#2 cols
                                                 #3-#4
           start_bit_image           sbim   Zq   Start printing bit
                                                 image graphics
           start_char_set_def        scsd   Zr   Start character set
                                                 definition #1, with
                                                 #2 characters in the
                                                 set
           stop_bit_image            rbim   Zs   Stop printing bit
                                                 image graphics
           stop_char_set_def         rcsd   Zt   End definition of
                                                 character set #1
           subscript_characters      subcs  Zu   List of subscript-
                                                 able characters
           superscript_characters    supcs  Zv   List of superscript-
                                                 able characters
           tab                       ht     ta   tab to next 8-space
                                                 hardware tab stop
           these_cause_cr            docr   Zw   Printing any of
                                                 these characters
                                                 causes CR
           to_status_line            tsl    ts   move to status line,
                                                 column #1
           tone                      tone   TO   select touch tone
                                                 dialing
           underline_char            uc     uc   underline char and
                                                 move past it
           up_half_line              hu     hu   half a line up
           user0                     u0     u0   User string #0
           user1                     u1     u1   User string #1
           user2                     u2     u2   User string #2
           user3                     u3     u3   User string #3
           user4                     u4     u4   User string #4

           user5                     u5     u5   User string #5
           user6                     u6     u6   User string #6
           user7                     u7     u7   User string #7
           user8                     u8     u8   User string #8
           user9                     u9     u9   User string #9
           wait_tone                 wait   WA   wait for dial-tone
           xoff_character            xoffc  XF   XOFF character
           xon_character             xonc   XN   XON character
           zero_motion               zerom  Zx   No motion for subse-
                                                 quent character

           The  following  string  capabilities  are  present  in the
           SVr4.0 term structure, but were originally not  documented
           in the man page.

                   Variable          Cap-     TCap    Description
                    String           name     Code
           alt_scancode_esc          scesa    S8   Alternate escape
                                                   for scancode emu-
                                                   lation
           bit_image_carriage_return bicr     Yv   Move to beginning
                                                   of same row
           bit_image_newline         binel    Zz   Move to next row
                                                   of the bit image
           bit_image_repeat          birep    Xy   Repeat bit image
                                                   cell #1 #2 times
           char_set_names            csnm     Zy   Produce #1'th item
                                                   from list of char-
                                                   acter set names
           code_set_init             csin     ci   Init sequence for
                                                   multiple codesets
           color_names               colornm  Yw   Give name for
                                                   color #1
           define_bit_image_region   defbi    Yx   Define rectan-
                                                   gualar bit image
                                                   region
           device_type               devt     dv   Indicate lan-
                                                   guage/codeset sup-
                                                   port
           display_pc_char           dispc    S1   Display PC charac-
                                                   ter #1
           end_bit_image_region      endbi    Yy   End a bit-image
                                                   region
           enter_pc_charset_mode     smpch    S2   Enter PC character
                                                   display mode
           enter_scancode_mode       smsc     S4   Enter PC scancode
                                                   mode
           exit_pc_charset_mode      rmpch    S3   Exit PC character
                                                   display mode
           exit_scancode_mode        rmsc     S5   Exit PC scancode
                                                   mode

           get_mouse                 getm     Gm   Curses should get
                                                   button events,
                                                   parameter #1 not
                                                   documented.
           key_mouse                 kmous    Km   Mouse event has
                                                   occurred
           mouse_info                minfo    Mi   Mouse status
                                                   information
           pc_term_options           pctrm    S6   PC terminal
                                                   options
           pkey_plab                 pfxl     xl   Program function
                                                   key #1 to type
                                                   string #2 and show
                                                   string #3
           req_mouse_pos             reqmp    RQ   Request mouse
                                                   position
           scancode_escape           scesc    S7   Escape for scan-
                                                   code emulation
           set0_des_seq              s0ds     s0   Shift to code set
                                                   0 (EUC set 0,
                                                   ASCII)
           set1_des_seq              s1ds     s1   Shift to code set
                                                   1
           set2_des_seq              s2ds     s2   Shift to code set
                                                   2
           set3_des_seq              s3ds     s3   Shift to code set
                                                   3
           set_a_background          setab    AB   Set background
                                                   color to #1, using
                                                   ANSI escape
           set_a_foreground          setaf    AF   Set foreground
                                                   color to #1, using
                                                   ANSI escape
           set_color_band            setcolor Yz   Change to ribbon
                                                   color #1
           set_lr_margin             smglr    ML   Set both left and
                                                   right margins to
                                                   #1, #2.  (ML is
                                                   not in BSD term-
                                                   cap).
           set_page_length           slines   YZ   Set page length to
                                                   #1 lines
           set_tb_margin             smgtb    MT   Sets both top and
                                                   bottom margins to
                                                   #1, #2

            The XSI Curses  standard  added  these.   They  are  some
            post-4.1  versions  of System V curses, e.g., Solaris 2.5
            and IRIX 6.x.  The ncurses termcap  names  for  them  are
            invented; according to the XSI Curses standard, they have
            no termcap names.  If your compiled terminfo entries  use
            these,  they  may  not be binary-compatible with System V
            terminfo entries after SVr4.1; beware!

                    Variable         Cap-   TCap     Description
                     String          name   Code
            enter_horizontal_hl_mode ehhlm  Xh   Enter horizontal
                                                 highlight mode
            enter_left_hl_mode       elhlm  Xl   Enter left highlight
                                                 mode
            enter_low_hl_mode        elohlm Xo   Enter low highlight
                                                 mode
            enter_right_hl_mode      erhlm  Xr   Enter right high-
                                                 light mode
            enter_top_hl_mode        ethlm  Xt   Enter top highlight
                                                 mode
            enter_vertical_hl_mode   evhlm  Xv   Enter vertical high-
                                                 light mode
            set_a_attributes         sgr1   sA   Define second set of
                                                 video attributes
                                                 #1-#6
            set_pglen_inch           slengthsL   YI Set page length
                                                 to #1 hundredth of
                                                 an inch

       A Sample Entry
           The following entry, describing an ANSI-standard terminal,
           is  representative  of  what a terminfo entry for a modern
           terminal typically looks like.

         ansi|ansi/pc-term compatible with color,
                 mc5i,
                 colors#8, ncv#3, pairs#64,
                 cub=\E[%p1%dD, cud=\E[%p1%dB, cuf=\E[%p1%dC,
                 cuu=\E[%p1%dA, dch=\E[%p1%dP, dl=\E[%p1%dM,
                 ech=\E[%p1%dX, el1=\E[1K, hpa=\E[%p1%dG, ht=\E[I,
                 ich=\E[%p1%d@, il=\E[%p1%dL, indn=\E[%p1%dS, .indn=\E[%p1%dT,
                 kbs=^H, kcbt=\E[Z, kcub1=\E[D, kcud1=\E[B,
                 kcuf1=\E[C, kcuu1=\E[A, kf1=\E[M, kf10=\E[V,
                 kf11=\E[W, kf12=\E[X, kf2=\E[N, kf3=\E[O, kf4=\E[P,
                 kf5=\E[Q, kf6=\E[R, kf7=\E[S, kf8=\E[T, kf9=\E[U,
                 kich1=\E[L, mc4=\E[4i, mc5=\E[5i, nel=\r\E[S,
                 op=\E[37;40m, rep=%p1%c\E[%p2%{1}%-%db,
                 rin=\E[%p1%dT, s0ds=\E(B, s1ds=\E)B, s2ds=\E*B,
                 s3ds=\E+B, setab=\E[4%p1%dm, setaf=\E[3%p1%dm,
                 setb=\E[4%?%p1%{1}%=%t4%e%p1%{3}%=%t6%e%p1%{4}%=%t1%e%p1%{6}%=%t3%e%p1%d%;m,
                 setf=\E[3%?%p1%{1}%=%t4%e%p1%{3}%=%t6%e%p1%{4}%=%t1%e%p1%{6}%=%t3%e%p1%d%;m,
                 sgr=\E[0;10%?%p1%t;7%;%?%p2%t;4%;%?%p3%t;7%;%?%p4%t;5%;%?%p6%t;1%;%?%p7%t;8%;%?%p8%t;11%;%?%p9%t;12%;m,
                 sgr0=\E[0;10m, tbc=\E[2g, u6=\E[%d;%dR, u7=\E[6n,
                 u8=\E[?%[;0123456789]c, u9=\E[c, vpa=\E[%p1%dd,

           Entries may continue onto multiple lines by placing  white
           space  at  the  beginning  of  each line except the first.
           Comments may be included on lines  beginning  with  ``#''.
           Capabilities in terminfo are of three types: Boolean capa-
           bilities which indicate that the terminal has some partic-
           ular  feature, numeric capabilities giving the size of the
           terminal or the size  of  particular  delays,  and  string
           capabilities,  which  give a sequence which can be used to
           perform particular terminal operations.

       Types of Capabilities
           All capabilities have names.  For instance, the fact  that
           ANSI-standard  terminals  have automatic margins (i.e., an
           automatic return and line-feed when the end of a  line  is
           reached)  is  indicated  by  the capability am.  Hence the
           description of ansi includes am.  Numeric capabilities are
           followed  by  the character `#' and then a positive value.
           Thus cols, which indicates the number of columns the  ter-
           minal  has,  gives  the  value  `80' for ansi.  Values for
           numeric capabilities may be specified in decimal, octal or
           hexadecimal,  using the C programming language conventions
           (e.g., 255, 0377 and 0xff or 0xFF).

           Finally, string valued capabilities, such as el (clear  to
           end of line sequence) are given by the two-character code,
           an `=', and then a string ending  at  the  next  following
           `,'.

           A  number  of  escape sequences are provided in the string
           valued capabilities for easy encoding of characters there.
           Both  \E  and  \e map to an ESCAPE character, ^x maps to a
           control-x for any appropriate x, and the sequences  \n  \l
           \r  \t  \b  \f  \s give a newline, line-feed, return, tab,
           backspace, form-feed, and space.  Other escapes include \^
           for  ^, \\ for \, \, for comma, \: for :, and \0 for null.
           (\0 will produce \200, which does not terminate  a  string
           but behaves as a null character on most terminals, provid-
           ing CS7 is specified.  See stty(1).)  Finally,  characters
           may be given as three octal digits after a \.

           A  delay  in  milliseconds may appear anywhere in a string
           capability, enclosed in $<..> brackets, as in  el=\EK$<5>,
           and  padding  characters  are supplied by tputs to provide
           this delay.  The delay must be a number with at  most  one
           decimal place of precision; it may be followed by suffixes
           `*' or '/' or both.  A  `*'  indicates  that  the  padding
           required  is  proportional to the number of lines affected
           by the  operation,  and  the  amount  given  is  the  per-
           affected-unit  padding  required.   (In the case of insert
           character,  the  factor  is  still  the  number  of  lines
           affected.)   Normally,  padding  is advisory if the device
           has the xon capability; it is used  for  cost  computation
           but  does not trigger delays.  A `/' suffix indicates that
           the padding is mandatory and forces a delay of  the  given
           number  of  milliseconds  even on devices for which xon is
           present to indicate flow control.

           Sometimes individual capabilities must be  commented  out.
           To  do this, put a period before the capability name.  For
           example, see the second ind in the example above.

       Fetching Compiled Descriptions
           If the environment variable TERMINFO is set, it is  inter-
           preted  as the pathname of a directory containing the com-
           piled description you are working on.  Only that directory
           is searched.

           If  TERMINFO  is  not set, the ncurses version of the ter-
           minfo reader code  will  instead  look  in  the  directory
           $HOME/.terminfo  for  a compiled description.  If it fails
           to find one  there,  and  the  environment  variable  TER-
           MINFO_DIRS  is set, it will interpret the contents of that
           variable as a list of colon- separated directories  to  be
           searched  (an  empty  entry is interpreted as a command to
           search /usr/share/terminfo).  If no description  is  found
           in  any of the TERMINFO_DIRS directories, the fetch fails.

           If neither TERMINFO nor TERMINFO_DIRS  is  set,  the  last
           place   tried  will  be  the  system  terminfo  directory,
           /usr/share/terminfo.

           (Neither the  $HOME/.terminfo  lookups  nor  TERMINFO_DIRS
           extensions   are  supported  under  stock  System  V  ter-
           minfo/curses.)

       Preparing Descriptions
           We now outline how to prepare descriptions  of  terminals.
           The  most  effective way to prepare a terminal description
           is by imitating the description of a similar  terminal  in
           terminfo  and  to  build up a description gradually, using
           partial descriptions with vi or some other screen-oriented
           program  to  check that they are correct.  Be aware that a
           very unusual terminal may expose deficiencies in the abil-
           ity  of  the  terminfo  file to describe it or bugs in the
           screen-handling code of the test program.

           To get the padding for insert line right (if the  terminal
           manufacturer did not document it) a severe test is to edit
           a large file at 9600 baud, delete 16 or so lines from  the
           middle  of  the screen, then hit the `u' key several times
           quickly.  If the terminal messes up, more padding is  usu-
           ally  needed.  A similar test can be used for insert char-
           acter.

       Basic Capabilities
           The number of columns on each line  for  the  terminal  is
           given  by the cols numeric capability.  If the terminal is
           a CRT, then the number of lines on the screen is given  by
           the lines capability.  If the terminal wraps around to the
           beginning of the next  line  when  it  reaches  the  right
           margin,  then  it  should  have the am capability.  If the
           terminal can clear its screen, leaving the cursor  in  the
           home  position,  then  this  is  given by the clear string
           capability.  If  the  terminal  overstrikes  (rather  than
           clearing  a position when a character is struck over) then
           it should have the os capability.  If the  terminal  is  a
           printing terminal, with no soft copy unit, give it both hc
           and os.  (os applies to storage scope terminals,  such  as
           TEKTRONIX 4010 series, as well as hard copy and APL termi-
           nals.)  If there is a code to move the cursor to the  left
           edge  of the current row, give this as cr.  (Normally this
           will be carriage return, control M.)  If there is  a  code
           to  produce  an audible signal (bell, beep, etc) give this
           as bel.

           If there is a code to move the cursor one position to  the
           left  (such  as backspace) that capability should be given
           as cub1.  Similarly, codes to move to the right,  up,  and
           down should be given as cuf1, cuu1, and cud1.  These local
           cursor motions should not alter the text they  pass  over,
           for  example,  you would not normally use `cuf1= ' because
           the space would erase the character moved over.

           A very important point  here  is  that  the  local  cursor
           motions  encoded in terminfo are undefined at the left and
           top edges  of  a  CRT  terminal.   Programs  should  never
           attempt  to  backspace  around the left edge, unless bw is
           given, and never attempt to go up locally off the top.  In
           order  to  scroll text up, a program will go to the bottom
           left corner of the screen and send the ind (index) string.

           To scroll text down, a program goes to the top left corner
           of the screen and sends the  ri  (reverse  index)  string.
           The  strings  ind  and  ri are undefined when not on their
           respective corners of the screen.

           Parameterized versions of the scrolling sequences are indn
           and rin which have the same semantics as ind and ri except
           that they take one parameter, and scroll that many  lines.
           They  are also undefined except at the appropriate edge of
           the screen.

           The am capability tells whether the cursor sticks  at  the
           right  edge  of  the  screen when text is output, but this
           does not necessarily apply to a cuf1 from the last column.
           The  only local motion which is defined from the left edge
           is if bw is given, then a cub1 from  the  left  edge  will
           move  to the right edge of the previous row.  If bw is not
           given, the effect is undefined.  This is useful for  draw-
           ing  a box around the edge of the screen, for example.  If
           the terminal has switch selectable automatic margins,  the
           terminfo  file  usually assumes that this is on; i.e., am.
           If the terminal has a command which  moves  to  the  first
           column  of the next line, that command can be given as nel
           (newline).  It does not matter if the command  clears  the
           remainder  of  the current line, so if the terminal has no
           cr and lf it may still be possible to craft a working  nel
           out of one or both of them.

           These  capabilities  suffice  to  describe  hard-copy  and
           "glass-tty" terminals.  Thus  the  model  33  teletype  is
           described as

         33|tty33|tty|model 33 teletype,
         bel=^G, cols#72, cr=^M, cud1=^J, hc, ind=^J, os,

           while the Lear Siegler ADM-3 is described as

         adm3|3|lsi adm3,
         am, bel=^G, clear=^Z, cols#80, cr=^M, cub1=^H, cud1=^J,
         ind=^J, lines#24,

       Parameterized Strings
           Cursor  addressing  and other strings requiring parameters
           in the terminal are described by  a  parameterized  string
           capability,  with  printf(3S)  like escapes %x in it.  For
           example, to address the  cursor,  the  cup  capability  is
           given, using two parameters: the row and column to address
           to.  (Rows and columns are numbered from zero and refer to
           the physical screen visible to the user, not to any unseen
           memory.)  If  the  terminal  has  memory  relative  cursor
           addressing, that can be indicated by mrcup.

           The  parameter  mechanism uses a stack and special % codes
           to manipulate it.  Typically a sequence will push  one  of
           the  parameters  onto  the stack and then print it in some
           format.  Often more complex operations are necessary.

           The % encodings have the following meanings:

                %%        outputs `%'
                %[[:]flags][width[.precision]][doxXs]
                          as in printf, flags are [-+#] and space
                %c        print pop() like %c in printf()
                %s        print pop() like %s in printf()

                %p[1-9]   push i'th parm
                %P[a-z]   set dynamic variable [a-z] to pop()
                %g[a-z]   get dynamic variable [a-z] and push it
                %P[A-Z]   set static variable [a-z] to pop()
                %g[A-Z]   get static variable [a-z] and push it
                %'c'      char constant c
                %{nn}     integer constant nn
                %l        push strlen(pop)

                %+ %- %* %/ %m
                          arithmetic (%m is mod): push(pop() op pop())

                %& %| %^  bit operations: push(pop() op pop())
                %= %> %<  logical operations: push(pop() op pop())
                %A, %O    logical and & or operations (for conditionals)
                %! %~     unary operations push(op pop())
                %i        add 1 to first two parameters (for ANSI terminals)

                %? expr %t thenpart %e elsepart %;
                          if-then-else, %e elsepart is optional.
                          else-if's are possible a la Algol 68:
                          %? c1 %t b1 %e c2 %t b2 %e c3 %t b3 %e c4 %t b4 %e %;
                          ci are conditions, bi are bodies.

           Binary operations are in postfix form with the operands in
           the  usual  order.   That  is,  to  get  x-5 one would use
           "%gx%{5}%-".  %P and %g variables  are  persistent  across
           escape-string evaluations.

           Consider the HP2645, which, to get to row 3 and column 12,
           needs to be sent \E&a12c03Y  padded  for  6  milliseconds.
           Note  that  the  order of the rows and columns is inverted
           here, and that the row and column are printed as two  dig-
           its.  Thus its cup capability is "cup=6\E&%p2%2dc%p1%2dY".

           The Microterm ACT-IV needs the current row and column sent
           preceded  by  a ^T, with the row and column simply encoded
           in binary, "cup=^T%p1%c%p2%c".  Terminals which  use  "%c"
           need  to  be  able  to backspace the cursor (cub1), and to
           move the cursor up one line on the screen (cuu1).  This is
           necessary  because it is not always safe to transmit \n ^D
           and \r, as the system may change or  discard  them.   (The
           library  routines  dealing  with terminfo set tty modes so
           that tabs are never expanded, so \t is safe to send.  This
           turns out to be essential for the Ann Arbor 4080.)

           A final example is the LSI ADM-3a, which uses row and col-
           umn  offset  by  a  blank  character,  thus  "cup=\E=%p1%'
           '%+%c%p2%'  '%+%c".   After sending `\E=', this pushes the
           first parameter, pushes the ASCII value for a space  (32),
           adds  them  (pushing  the sum on the stack in place of the
           two previous values) and outputs that value as  a  charac-
           ter.   Then  the  same  is  done for the second parameter.
           More complex arithmetic is possible using the stack.

       Cursor Motions
           If the terminal has a fast way to home the cursor (to very
           upper  left  corner  of  screen) then this can be given as
           home; similarly a fast way of getting to the  lower  left-
           hand  corner can be given as ll; this may involve going up
           with cuu1 from the home position,  but  a  program  should
           never  do this itself (unless ll does) because it can make
           no assumption about the effect of moving up from the  home
           position.   Note  that  the  home  position is the same as
           addressing to (0,0): to the top left corner of the screen,
           not  of  memory.   (Thus, the \EH sequence on HP terminals
           cannot be used for home.)

           If the terminal has row or column absolute cursor address-
           ing,  these  can be given as single parameter capabilities
           hpa (horizontal position absolute) and vpa (vertical posi-
           tion absolute).  Sometimes these are shorter than the more
           general two parameter sequence (as with  the  hp2645)  and
           can be used in preference to cup.  If there are parameter-
           ized local motions (e.g., move  n  spaces  to  the  right)
           these can be given as cud, cub, cuf, and cuu with a single
           parameter indicating how many spaces to move.   These  are
           primarily  useful  if the terminal does not have cup, such
           as the TEKTRONIX 4025.

           If the terminal needs to be in a special mode when running
           a program that uses these capabilities, the codes to enter
           and exit this mode can be given as smcup and rmcup.   This
           arises,  for example, from terminals like the Concept with
           more than one page of memory.  If the  terminal  has  only
           memory  relative cursor addressing and not screen relative
           cursor addressing, a one screen-sized window must be fixed
           into  the terminal for cursor addressing to work properly.
           This is also used for the TEKTRONIX 4025, where smcup sets
           the  command character to be the one used by terminfo.  If
           the smcup sequence will not restore the  screen  after  an
           rmcup sequence is output (to the state prior to outputting
           rmcup), specify nrrmc.

       Area Clears
           If the terminal can clear from the current position to the
           end  of  the  line,  leaving  the cursor where it is, this
           should be given as el.  If the terminal can clear from the
           beginning  of  the line to the current position inclusive,
           leaving the cursor where it is, this should  be  given  as
           el1.   If the terminal can clear from the current position
           to the end of the display, then this should  be  given  as
           ed.   Ed  is only defined from the first column of a line.
           (Thus, it can be simulated by a request to delete a  large
           number of lines, if a true ed is not available.)

       Insert/delete line and vertical motions
           If  the terminal can open a new blank line before the line
           where the cursor is, this should be given as il1; this  is
           done  only  from the first position of a line.  The cursor
           must then appear on the newly blank line.  If the terminal
           can  delete  the  line  which  the cursor is on, then this
           should be given as dl1; this is done only from  the  first
           position  on  the line to be deleted.  Versions of il1 and
           dl1 which take a single parameter  and  insert  or  delete
           that many lines can be given as il and dl.

           If  the terminal has a settable scrolling region (like the
           vt100) the command to set this can be described  with  the
           csr  capability,  which  takes two parameters: the top and
           bottom lines of the scrolling region.  The cursor position
           is, alas, undefined after using this command.

           It  is possible to get the effect of insert or delete line
           using csr on a properly chosen region; the sc and rc (save
           and  restore  cursor)  commands may be useful for ensuring
           that your synthesized insert/delete string does  not  move
           the  cursor.  (Note that the ncurses(3x) library does this
           synthesis  automatically,  so   you   need   not   compose
           insert/delete strings for an entry with csr).

           Yet another way to construct insert and delete might be to
           use a combination of index with  the  memory-lock  feature
           found  on some terminals (like the HP-700/90 series, which
           however also has insert/delete).

           Inserting lines at the top or bottom  of  the  screen  can
           also  be  done using ri or ind on many terminals without a
           true insert/delete line, and is often faster even on  ter-
           minals with those features.

           The  boolean  non_dest_scroll_region should be set if each
           scrolling window is effectively a view port on  a  screen-
           sized  canvas.   To  test  for  this  capability, create a
           scrolling region in the middle of the screen, write  some-
           thing  to  the  bottom line, move the cursor to the top of
           the region, and do ri followed by dl1 or ind.  If the data
           scrolled  off  the  bottom  of  the  region  by the ri re-
           appears, then scrolling is non-destructive.  System V  and
           XSI  Curses  expect that ind, ri, indn, and rin will simu-
           late destructive scrolling; their  documentation  cautions
           you  not  to  define csr unless this is true.  This curses
           implementation is more liberal and will do explicit erases
           after scrolling if ndstr is defined.

           If the terminal has the ability to define a window as part
           of memory, which all commands affect, it should  be  given
           as the parameterized string wind.  The four parameters are
           the starting and ending lines in memory and  the  starting
           and ending columns in memory, in that order.

           If  the terminal can retain display memory above, then the
           da capability should be given; if display  memory  can  be
           retained  below,  then db should be given.  These indicate
           that deleting a line  or  scrolling  may  bring  non-blank
           lines  up  from  below  or that scrolling back with ri may
           bring down non-blank lines.

       Insert/Delete Character
           There are two basic kinds of  intelligent  terminals  with
           respect  to insert/delete character which can be described
           using terminfo.  The most common  insert/delete  character
           operations  affect only the characters on the current line
           and shift characters off the  end  of  the  line  rigidly.
           Other  terminals,  such  as the Concept 100 and the Perkin
           Elmer Owl, make a distinction between  typed  and  untyped
           blanks  on  the  screen, shifting upon an insert or delete
           only to an untyped blank on the  screen  which  is  either
           eliminated,  or  expanded  to two untyped blanks.  You can
           determine the kind of terminal you have  by  clearing  the
           screen  and  then typing text separated by cursor motions.
           Type "abc    def" using local cursor motions (not  spaces)
           between the "abc" and the "def".  Then position the cursor
           before the "abc" and put the terminal in insert mode.   If
           typing  characters  causes  the  rest of the line to shift
           rigidly and characters to fall off the end, then your ter-
           minal  does  not  distinguish  between  blanks and untyped
           positions.  If the "abc" shifts over to  the  "def"  which
           then  move together around the end of the current line and
           onto the next as you insert, you have the second  type  of
           terminal,  and should give the capability in, which stands
           for "insert null".  While these are two logically separate
           attributes  (one  line  versus multi-line insert mode, and
           special treatment of untyped spaces) we have seen no  ter-
           minals whose insert mode cannot be described with the sin-
           gle attribute.

           Terminfo can describe both terminals which have an  insert
           mode, and terminals which send a simple sequence to open a
           blank position on the current  line.   Give  as  smir  the
           sequence  to  get  into  insert  mode.   Give  as rmir the
           sequence to leave insert  mode.   Now  give  as  ich1  any
           sequence needed to be sent just before sending the charac-
           ter to be inserted.  Most terminals  with  a  true  insert
           mode  will  not give ich1; terminals which send a sequence
           to open a screen position should give it here.

           If your terminal has both, insert mode is usually  prefer-
           able  to  ich1.   Technically,  you  should  not give both
           unless the terminal actually requires both to be  used  in
           combination.   Accordingly,  some  non-curses applications
           get confused if both are present; the symptom  is  doubled
           characters in an update using insert.  This requirement is
           now rare; most ich sequences do not require previous smir,
           and most smir insert modes do not require ich1 before each
           character.  Therefore, the  new  curses  actually  assumes
           this  is the case and uses either rmir/smir or ich/ich1 as
           appropriate (but not both).  If you have to write an entry
           to  be  used under new curses for a terminal old enough to
           need both, include the rmir/smir sequences in ich1.

           If post insert padding is needed, give this as a number of
           milliseconds  in ip (a string option).  Any other sequence
           which may need to be sent after  an  insert  of  a  single
           character may also be given in ip.  If your terminal needs
           both to be placed into an `insert mode' and a special code
           to  precede  each  inserted character, then both smir/rmir
           and ich1 can be given, and both will  be  used.   The  ich
           capability, with one parameter, n, will repeat the effects
           of ich1 n times.

           If padding is necessary between characters typed while not
           in  insert  mode,  give  this  as a number of milliseconds
           padding in rmp.

           It is occasionally  necessary  to  move  around  while  in
           insert  mode  to delete characters on the same line (e.g.,
           if there is a tab after the insertion position).  If  your
           terminal  allows  motion while in insert mode you can give
           the capability mir to speed up  inserting  in  this  case.
           Omitting  mir  will  affect  only  speed.   Some terminals
           (notably Datamedia's) must not have mir because of the way
           their insert mode works.

           Finally,  you  can specify dch1 to delete a single charac-
           ter, dch with one parameter, n, to  delete  n  characters,
           and  delete mode by giving smdc and rmdc to enter and exit
           delete mode (any mode the terminal needs to be  placed  in
           for dch1 to work).

           A  command to erase n characters (equivalent to outputting
           n blanks without moving the cursor) can be  given  as  ech
           with one parameter.

       Highlighting, Underlining, and Visible Bells
           If  your  terminal  has  one  or  more  kinds  of  display
           attributes, these can be represented in a number  of  dif-
           ferent ways.  You should choose one display form as stand-
           out mode, representing a good, high contrast, easy-on-the-
           eyes,  format  for  highlighting  error messages and other
           attention getters.  (If you have a choice,  reverse  video
           plus  half-bright  is  good, or reverse video alone.)  The
           sequences to enter and exit standout  mode  are  given  as
           smso  and  rmso, respectively.  If the code to change into
           or out of standout mode  leaves  one  or  even  two  blank
           spaces  on the screen, as the TVI 912 and Teleray 1061 do,
           then xmc should be given to tell how many spaces are left.

           Codes  to  begin  underlining  and  end underlining can be
           given as smul and rmul respectively.  If the terminal  has
           a  code  to  underline  the current character and move the
           cursor one space to the right, such as the Microterm Mime,
           this can be given as uc.

           Other  capabilities  to  enter  various highlighting modes
           include blink (blinking) bold (bold or extra  bright)  dim
           (dim  or  half-bright)  invis (blanking or invisible text)
           prot (protected) rev (reverse video) sgr0  (turn  off  all
           attribute  modes)  smacs  (enter  alternate  character set
           mode) and  rmacs  (exit  alternate  character  set  mode).
           Turning  on  any of these modes singly may or may not turn
           off other modes.

           If there is a sequence to set  arbitrary  combinations  of
           modes,  this should be given as sgr (set attributes), tak-
           ing 9 parameters.  Each parameter is either 0 or  nonzero,
           as the corresponding attribute is on or off.  The 9 param-
           eters are, in order: standout, underline, reverse,  blink,
           dim,  bold,  blank, protect, alternate character set.  Not
           all modes need be supported by sgr, only those  for  which
           corresponding separate attribute commands exist.

           For example, the DEC vt220 supports most of the modes:

               tparm parameter   attribute    escape sequence

               none              none         \E[0m
               p1                standout     \E[0;1;7m
               p2                underline    \E[0;4m
               p3                reverse      \E[0;7m
               p4                blink        \E[0;5m
               p5                dim          not available
               p6                bold         \E[0;1m
               p7                invis        \E[0;8m
               p8                protect      not used
               p9                altcharset   ^O (off) ^N (on)

           We  begin each escape sequence by turning off any existing
           modes, since there is no quick way  to  determine  whether
           they are active.  Standout is set up to be the combination
           of reverse and bold.  The vt220  terminal  has  a  protect
           mode,  though  it  is  not commonly used in sgr because it
           protects characters on the screen  from  the  host's  era-
           sures.   The  altcharset mode also is different in that it
           is either ^O or ^N, depending on whether it is off or  on.
           If  all  modes  are  turned  on, the resulting sequence is
           \E[0;1;4;5;7;8m^N.

           Some sequences are common to different modes.   For  exam-
           ple,  ;7  is output when either p1 or p3 is true, that is,
           if either standout or reverse modes are turned on.

           Writing out the above sequences, along with  their  depen-
           dencies yields

             sequence    when to output     terminfo translation

             \E[0       always              \E[0
             ;1         if p1 or p6         %?%p1%p6%|%t;1%;
             ;4         if p2               %?%p2%|%t;4%;

             ;5         if p4               %?%p4%|%t;5%;
             ;7         if p1 or p3         %?%p1%p3%|%t;7%;
             ;8         if p7               %?%p7%|%t;8%;
             m          always              m
             ^N or ^O   if p9 ^N, else ^O   %?%p9%t^N%e^O%;

           Putting this all together into the sgr sequence gives:

               sgr=\E[0%?%p1%p6%|%t;1%;%?%p2%t;4%;%?%p1%p3%|%t;7%;
                   %?%p4%t;5%;%?%p7%t;8%;m%?%p9%t\016%e\017%;,

           Remember  that  if  you specify sgr, you must also specify
           sgr0.

           Terminals with the ``magic cookie'' glitch  (xmc)  deposit
           special   ``cookies''   when   they  receive  mode-setting
           sequences, which affect the display algorithm rather  than
           having  extra  bits  for  each character.  Some terminals,
           such as the HP 2621,  automatically  leave  standout  mode
           when  they  move to a new line or the cursor is addressed.
           Programs using standout mode  should  exit  standout  mode
           before  moving the cursor or sending a newline, unless the
           msgr capability, asserting that it  is  safe  to  move  in
           standout mode, is present.

           If  the terminal has a way of flashing the screen to indi-
           cate an error quietly (a bell replacement) then  this  can
           be given as flash; it must not move the cursor.

           If  the  cursor  needs to be made more visible than normal
           when it is not on the bottom line (to make, for example, a
           non-blinking  underline  into  an  easier to find block or
           blinking underline) give this sequence as cvvis.  If there
           is  a  way  to  make the cursor completely invisible, give
           that as civis.  The capability cnorm should be given which
           undoes the effects of both of these modes.

           If your terminal correctly generates underlined characters
           (with no special codes needed) even  though  it  does  not
           overstrike,  then you should give the capability ul.  If a
           character overstriking another leaves both  characters  on
           the screen, specify the capability os.  If overstrikes are
           erasable with a blank, then this should  be  indicated  by
           giving eo.

       Keypad and Function Keys
           If the terminal has a keypad that transmits codes when the
           keys are pressed, this information  can  be  given.   Note
           that it is not possible to handle terminals where the key-
           pad only works in local (this applies, for example, to the
           unshifted  HP  2621  keys).   If  the keypad can be set to
           transmit or not transmit, give these  codes  as  smkx  and
           rmkx.  Otherwise the keypad is assumed to always transmit.
           The codes sent by the left arrow, right arrow,  up  arrow,
           down  arrow,  and  home keys can be given as kcub1, kcuf1,
           kcuu1, kcud1, and khome respectively.  If there are  func-
           tion  keys  such  as f0, f1, ..., f10, the codes they send
           can be given as kf0, kf1, ..., kf10.  If these  keys  have
           labels  other  than the default f0 through f10, the labels
           can be given as lf0, lf1, ..., lf10.  The codes  transmit-
           ted  by certain other special keys can be given: kll (home
           down), kbs  (backspace),  ktbc  (clear  all  tabs),  kctab
           (clear the tab stop in this column), kclr (clear screen or
           erase key), kdch1 (delete character), kdl1 (delete  line),
           krmir  (exit insert mode), kel (clear to end of line), ked
           (clear to end of screen), kich1 (insert character or enter
           insert  mode),  kil1  (insert  line), knp (next page), kpp
           (previous page), kind (scroll forward/down),  kri  (scroll
           backward/up),  khts  (set  a tab stop in this column).  In
           addition, if the keypad has a 3 by 3 array of keys includ-
           ing  the four arrow keys, the other five keys can be given
           as ka1, ka3, kb2, kc1, and kc3.   These  keys  are  useful
           when the effects of a 3 by 3 directional pad are needed.

           Strings  to  program  function keys can be given as pfkey,
           pfloc, and pfx.  A string to program screen labels  should
           be  specified  as  pln.   Each  of these strings takes two
           parameters: the function key number to program (from 0  to
           10)  and the string to program it with.  Function key num-
           bers out of this range may program  undefined  keys  in  a
           terminal  dependent  manner.   The  difference between the
           capabilities is that pfkey causes pressing the  given  key
           to  be the same as the user typing the given string; pfloc
           causes the string to be executed by the terminal in local;
           and  pfx  causes  the string to be transmitted to the com-
           puter.

           The capabilities nlab, lw and lh define the number of pro-
           grammable  screen  labels  and their width and height.  If
           there are commands to turn the labels  on  and  off,  give
           them  in smln and rmln.  smln is normally output after one
           or more pln sequences to make sure that the change becomes
           visible.

       Tabs and Initialization
           If  the terminal has hardware tabs, the command to advance
           to the next tab stop can be given as ht  (usually  control
           I).   A  ``back-tab''  command which moves leftward to the
           preceding tab stop can be given as cbt.  By convention, if
           the  teletype  modes indicate that tabs are being expanded
           by the computer rather than being sent  to  the  terminal,
           programs  should  not  use ht or cbt even if they are pre-
           sent, since the user may not have the tab  stops  properly
           set.   If  the  terminal  has hardware tabs which are ini-
           tially set every n spaces when the terminal is powered up,
           the  numeric  parameter it is given, showing the number of
           spaces the tabs are set to.  This is normally used by  the
           tset  command  to  determine  whether  to set the mode for
           hardware tab expansion, and whether to set the tab  stops.
           If  the  terminal  has tab stops that can be saved in non-
           volatile memory, the terminfo description can assume  that
           they are properly set.

           Other  capabilities include is1, is2, and is3, initializa-
           tion strings for the terminal, iprog, the path name  of  a
           program  to be run to initialize the terminal, and if, the
           name of a file  containing  long  initialization  strings.
           These  strings are expected to set the terminal into modes
           consistent with the  rest  of  the  terminfo  description.
           They are normally sent to the terminal, by the init option
           of the tput program, each time the  user  logs  in.   They
           will  be  printed  in the following order: run the program
           iprog; output is1; is2; set the margins  using  mgc,  smgl
           and  smgr;  set tabs using tbc and hts; print the file if;
           and finally output is3.

           Most initialization is done with  is2.   Special  terminal
           modes can be set up without duplicating strings by putting
           the common sequences in is2 and special cases in  is1  and
           is3.   A pair of sequences that does a harder reset from a
           totally unknown state can be  analogously  given  as  rs1,
           rs2,  rf, and rs3, analogous to is2 and if.  These strings
           are output by the reset program, which is  used  when  the
           terminal  gets into a wedged state.  Commands are normally
           placed in rs1, rs2 rs3 and rf only if they produce  annoy-
           ing  effects on the screen and are not necessary when log-
           ging in.  For example, the command to set the  vt100  into
           80-column  mode  would  normally  be  part  of is2, but it
           causes an annoying glitch of the screen and  is  not  nor-
           mally  needed  since the terminal is usually already in 80
           column mode.

           If there are commands to set and clear tab stops, they can
           be  given  as tbc (clear all tab stops) and hts (set a tab
           stop in the current column of every row).  If a more  com-
           plex  sequence  is  needed  to  set  the  tabs than can be
           described by this, the sequence can be placed  in  is2  or
           if.

       Delays and Padding
           Many  older  and  slower  terminals  don't  support either
           XON/XOFF or DTR handshaking, including hard copy terminals
           and  some  very  archaic CRTs (including, for example, DEC
           VT100s).  These may require padding characters after  cer-
           tain cursor motions and screen changes.

           If the terminal uses xon/xoff handshaking for flow control
           (that is, it automatically emits ^S back to the host  when
           its input buffers are close to full), set xon.  This capa-
           bility suppresses the emission of padding.  You  can  also
           set  it for memory-mapped console devices effectively that
           don't have a  speed  limit.   Padding  information  should
           still  be  included so that routines can make better deci-
           sions about relative costs, but actual pad characters will
           not be transmitted.

           If  pb (padding baud rate) is given, padding is suppressed
           at baud rates below the value of pb.  If the entry has  no
           padding  baud rate, then whether padding is emitted or not
           is completely controlled by xon.

           If the terminal requires other than a null (zero)  charac-
           ter  as  a  pad,  then this can be given as pad.  Only the
           first character of the pad string is used.

       Status Lines
           Some terminals have an extra `status line'  which  is  not
           normally  used  by  software  (and thus not counted in the
           terminal's lines capability).

           The simplest case  is  a  status  line  which  is  cursor-
           addressable  but  not part of the main scrolling region on
           the screen; the Heathkit H19 has a  status  line  of  this
           kind,  as  would  a 24-line VT100 with a 23-line scrolling
           region set up on initialization.  This situation is  indi-
           cated by the hs capability.

           Some terminals with status lines need special sequences to
           access the status line.   These  may  be  expressed  as  a
           string with single parameter tsl which takes the cursor to
           a given zero-origin column on the status line.  The  capa-
           bility fsl must return to the main-screen cursor positions
           before the last tsl.  You may need  to  embed  the  string
           values  of sc (save cursor) and rc (restore cursor) in tsl
           and fsl to accomplish this.

           The status line is normally assumed to be the  same  width
           as  the width of the terminal.  If this is untrue, you can
           specify it with the numeric capability wsl.

           A command to erase or blank the status line may be  speci-
           fied as dsl.

           The   boolean   capability  eslok  specifies  that  escape
           sequences, tabs, etc., work ordinarily in the status line.

           The  ncurses  implementation does not yet use any of these
           capabilities.  They are documented here in case they  ever
           become important.

       Line Graphics
           Many  terminals  have  alternate character sets useful for
           forms-drawing.  Terminfo and curses build in  support  for
           the  drawing  characters supported by the VT100, with some
           characters from the AT&T  4410v1  added.   This  alternate
           character set may be specified by the acsc capability.

                    Glyph             ACS            Ascii      VT100
                     Name             Name           Default    Name
           UK pound sign              ACS_STERLING   f          }
           arrow pointing down        ACS_DARROW     v          .
           arrow pointing left        ACS_LARROW     <          ,
           arrow pointing right       ACS_RARROW     >          +
           arrow pointing up          ACS_UARROW     ^          -
           board of squares           ACS_BOARD      #          h
           bullet                     ACS_BULLET     o          ~
           checker board (stipple)    ACS_CKBOARD    :          a
           degree symbol              ACS_DEGREE     \          f
           diamond                    ACS_DIAMOND    +          `
           greater-than-or-equal-to   ACS_GEQUAL     >          z
           greek pi                   ACS_PI         *          {
           horizontal line            ACS_HLINE      -          q
           lantern symbol             ACS_LANTERN    #          i
           large plus or crossover    ACS_PLUS       +          n
           less-than-or-equal-to      ACS_LEQUAL     <          y
           lower left corner          ACS_LLCORNER   +          m
           lower right corner         ACS_LRCORNER   +          j
           not-equal                  ACS_NEQUAL     !          |
           plus/minus                 ACS_PLMINUS    #          g
           scan line 1                ACS_S1         ~          o
           scan line 3                ACS_S3         -          p
           scan line 7                ACS_S7         -          r
           scan line 9                ACS_S9         _          s
           solid square block         ACS_BLOCK      #          0
           tee pointing down          ACS_TTEE       +          w
           tee pointing left          ACS_RTEE       +          u
           tee pointing right         ACS_LTEE       +          t
           tee pointing up            ACS_BTEE       +          v
           upper left corner          ACS_ULCORNER   +          l
           upper right corner         ACS_URCORNER   +          k
           vertical line              ACS_VLINE      |          x

           The  best  way to define a new device's graphics set is to
           add a column to a copy of this table  for  your  terminal,
           giving   the   character   which   (when  emitted  between
           smacs/rmacs switches) will be rendered as the  correspond-
           ing  graphic.  Then read off the VT100/your terminal char-
           acter pairs right to left in sequence;  these  become  the
           ACSC string.

       Color Handling
           Most  color  terminals are either `Tektronix-like' or `HP-
           like'.  Tektronix-like terminals have a predefined set  of
           N  colors  (where N usually 8), and can set character-cell
           foreground and background characters independently, mixing
           them  into  N  * N color-pairs.  On HP-like terminals, the
           use must set each color pair up separately (foreground and
           background  are  not  independently  settable).   Up  to M
           color-pairs may be  set  up  from  2*M  different  colors.
           ANSI-compatible terminals are Tektronix-like.

           Some basic color capabilities are independent of the color
           method.  The numeric capabilities colors and pairs specify
           the  maximum numbers of colors and color-pairs that can be
           displayed simultaneously.  The op (original  pair)  string
           resets  foreground  and background colors to their default
           values for the terminal.  The oc string resets all  colors
           or  color-pairs  to their default values for the terminal.
           Some terminals  (including  many  PC  terminal  emulators)
           erase  screen  areas  with  the  current  background color
           rather than the power-up default background; these  should
           have the boolean capability bce.

           To  change the current foreground or background color on a
           Tektronix-type terminal, use setaf (set  ANSI  foreground)
           and  setab  (set ANSI background) or setf (set foreground)
           and setb (set background).  These take one parameter,  the
           color  number.   The  SVr4  documentation  describes  only
           setaf/setab; the XPG4 draft says  that  "If  the  terminal
           supports ANSI escape sequences to set background and fore-
           ground, they should be coded as setaf and  setab,  respec-
           tively.   If  the terminal supports other escape sequences
           to set background and foreground, they should be coded  as
           setf  and  setb, respectively.  The vidputs() function and
           the refresh functions use setaf  and  setab  if  they  are
           defined."

           The  setaf/setab  and setf/setb capabilities take a single
           numeric argument each.  Argument values 0-7  are  portably
           defined  as  follows  (the  middle  column is the symbolic
           #define available in the header for the curses or  ncurses
           libraries).  The terminal hardware is free to map these as
           it likes, but the RGB values indicate normal locations  in
           color space.

                 Color       #define       Value       RGB
                 black     COLOR_BLACK       0     0, 0, 0
                 red       COLOR_RED         1     max,0,0
                 green     COLOR_GREEN       2     0,max,0
                 yellow    COLOR_YELLOW      3     max,max,0
                 blue      COLOR_BLUE        4     0,0,max
                 magenta   COLOR_MAGENTA     5     max,0,max
                 cyan      COLOR_CYAN        6     0,max,max
                 white     COLOR_WHITE       7     max,max,max

           On  an  HP-like terminal, use scp with a color-pair number
           parameter to set which color pair is current.

           On a Tektronix-like terminal, the capability  ccc  may  be
           present  to  indicate that colors can be modified.  If so,
           the initc capability will take a color number (0 to colors
           -  1)and  three  more parameters which describe the color.
           These three parameters default to being interpreted as RGB
           (Red,  Green, Blue) values.  If the boolean capability hls
           is present, they are instead as HLS (Hue, Lightness, Satu-
           ration) indices.  The ranges are terminal-dependent.

           On  an  HP-like  terminal, initp may give a capability for
           changing a color-pair value.  It will take  seven  parame-
           ters;  a  color-pair  number (0 to max_pairs - 1), and two
           triples describing first background  and  then  foreground
           colors.   These  parameters  must be (Red, Green, Blue) or
           (Hue, Lightness, Saturation) depending on hls.

           On some color terminals, colors collide  with  highlights.
           You can register these collisions with the ncv capability.
           This is a bit-mask of attributes not to be used when  col-
           ors  are  enabled.  The correspondence with the attributes
           understood by curses is as follows:

                          Attribute      Bit   Decimal
                          A_STANDOUT     0     1
                          A_UNDERLINE    1     2
                          A_REVERSE      2     4
                          A_BLINK        3     8
                          A_DIM          4     16
                          A_BOLD         5     32
                          A_INVIS        6     64
                          A_PROTECT      7     128
                          A_ALTCHARSET   8     256

           For example,  on  many  IBM  PC  consoles,  the  underline
           attribute  collides  with the foreground color blue and is
           not available in color mode.  These  should  have  an  ncv
           capability of 2.

           SVr4  curses  does nothing with ncv, ncurses recognizes it
           and optimizes the output in favor of colors.

       Miscellaneous
           If the terminal requires other than a null (zero)  charac-
           ter  as  a  pad,  then this can be given as pad.  Only the
           first character of the pad string is used.  If the  termi-
           nal does not have a pad character, specify npc.  Note that
           ncurses implements  the  termcap-compatible  PC  variable;
           though  the  application  may  set this value to something
           other than a null, ncurses will test  npc  first  and  use
           napms if the terminal has no pad character.

           If  the terminal can move up or down half a line, this can
           be indicated with hu  (half-line  up)  and  hd  (half-line
           down).   This  is  primarily  useful  for superscripts and
           subscripts on hard-copy terminals.  If a hard-copy  termi-
           nal  can  eject to the next page (form feed), give this as
           ff (usually control L).

           If there is a command to repeat a given character a  given
           number  of times (to save time transmitting a large number
           of identical characters) this can be  indicated  with  the
           parameterized  string  rep.   The  first  parameter is the
           character to be repeated and the second is the  number  of
           times  to repeat it.  Thus, tparm(repeat_char, 'x', 10) is
           the same as `xxxxxxxxxx'.

           If the terminal has a settable command character, such  as
           the  TEKTRONIX  4025, this can be indicated with cmdch.  A
           prototype command character is chosen which is used in all
           capabilities.   This character is given in the cmdch capa-
           bility to identify it.  The following convention  is  sup-
           ported  on  some  UNIX  systems:  The environment is to be
           searched for a CC variable, and if found, all  occurrences
           of the prototype character are replaced with the character
           in the environment variable.

           Terminal descriptions that do  not  represent  a  specific
           kind of known terminal, such as switch, dialup, patch, and
           network, should include the  gn  (generic)  capability  so
           that  programs  can  complain that they do not know how to
           talk to the terminal.  (This capability does not apply  to
           virtual   terminal   descriptions  for  which  the  escape
           sequences are known.)

           If the terminal has a ``meta key'' which acts as  a  shift
           key,  setting  the  8th  bit of any character transmitted,
           this fact can be indicated with km.   Otherwise,  software
           will assume that the 8th bit is parity and it will usually
           be cleared.  If strings exist to turn this  ``meta  mode''
           on and off, they can be given as smm and rmm.

           If  the terminal has more lines of memory than will fit on
           the screen at once, the number of lines of memory  can  be
           indicated  with  lm.   A  value of lm#0 indicates that the
           number of lines is not fixed, but that there is still more
           memory than fits on the screen.

           If the terminal is one of those supported by the UNIX vir-
           tual terminal protocol, the terminal number can  be  given
           as vt.

           Media copy strings which control an auxiliary printer con-
           nected to the terminal can be given as mc0: print the con-
           tents  of  the screen, mc4: turn off the printer, and mc5:
           turn on the printer.  When the printer  is  on,  all  text
           sent  to  the terminal will be sent to the printer.  It is
           undefined whether the text is also displayed on the termi-
           nal screen when the printer is on.  A variation mc5p takes
           one parameter, and leaves the printer on for as many char-
           acters  as  the  value  of  the  parameter, then turns the
           printer off.  The parameter should not  exceed  255.   All
           text,  including  mc4,  is  transparently  passed  to  the
           printer while an mc5p is in effect.

       Glitches and Braindamage
           Hazeltine terminals, which do not allow `~' characters  to
           be displayed should indicate hz.

           Terminals which ignore a line-feed immediately after an am
           wrap, such as the Concept and vt100, should indicate xenl.

           If  el  is  required  to  get  rid of standout (instead of
           merely writing normal text on top of it),  xhp  should  be
           given.

           Teleray  terminals,  where  tabs turn all characters moved
           over to blanks, should  indicate  xt  (destructive  tabs).
           Note:    the    variable    indicating    this    is   now
           `dest_tabs_magic_smso'; in older  versions,  it  was  tel-
           eray_glitch.  This glitch is also taken to mean that it is
           not possible to position the cursor on top  of  a  ``magic
           cookie'', that to erase standout mode it is instead neces-
           sary to use delete and insert line.  The ncurses implemen-
           tation ignores this glitch.

           The  Beehive Superbee, which is unable to correctly trans-
           mit the escape or control C characters, has xsb,  indicat-
           ing  that the f1 key is used for escape and f2 for control
           C.  (Only certain Superbees have this  problem,  depending
           on  the  ROM.)  Note that in older terminfo versions, this
           capability  was  called  `beehive_glitch';   it   is   now
           `no_esc_ctl_c'.

           Other  specific  terminal  problems  may  be  corrected by
           adding more capabilities of the form xx.

       Similar Terminals
           If there are two very similar terminals, one (the variant)
           can  be  defined  as  being just like the other (the base)
           with certain exceptions.  In the definition of  the  vari-
           ant,  the string capability use can be given with the name
           of the base terminal.  The capabilities given  before  use
           override  those  in  the base type named by use.  If there
           are multiple use capabilities, they are merged in  reverse
           order.   That is, the rightmost use reference is processed
           first, then the one to its left, and so forth.   Capabili-
           ties  given explicitly in the entry override those brought
           in by use references.

           A capability can be canceled by placing xx@ to the left of
           the  use  reference that imports it, where xx is the capa-
           bility.  For example, the entry

                       2621-nl, smkx@, rmkx@, use=2621,

           defines a 2621-nl that does not  have  the  smkx  or  rmkx
           capabilities,  and hence does not turn on the function key
           labels when in visual mode.  This is useful for  different
           modes for a terminal, or for different user preferences.

       Pitfalls of Long Entries
           Long  terminfo  entries  are  unlikely to be a problem; to
           date, no entry has even approached terminfo's  4K  string-
           table  maximum.   Unfortunately,  the termcap translations
           are much more  strictly  limited  (to  1K),  thus  termcap
           translations  of long terminfo entries can cause problems.

           The man pages for 4.3BSD and older versions  of  tgetent()
           instruct  the user to allocate a 1K buffer for the termcap
           entry.  The entry  gets  null-terminated  by  the  termcap
           library, so that makes the maximum safe length for a term-
           cap entry 1k-1 (1023) bytes.  Depending on what the appli-
           cation  and the termcap library being used does, and where
           in the termcap file the terminal type  that  tgetent()  is
           searching for is, several bad things can happen.

           Some  termcap libraries print a warning message or exit if
           they find an entry that's longer than 1023  bytes;  others
           don't;  others  truncate  the entries to 1023 bytes.  Some
           application programs allocate more than the recommended 1K
           for the termcap entry; others don't.

           Each termcap entry has two important sizes associated with
           it: before "tc" expansion, and after "tc" expansion.  "tc"
           is  the  capability that tacks on another termcap entry to
           the end of the current one, to add  on  its  capabilities.
           If  a  termcap entry doesn't use the "tc" capability, then
           of course the two lengths are the same.

           The "before tc expansion" length  is  the  most  important
           one,  because it affects more than just users of that par-
           ticular terminal.  This is the length of the entry  as  it
           exists in /etc/termcap, minus the backslash-newline pairs,
           which tgetent() strips out while reading it.  Some termcap
           libraries  strip  off  the final newline, too (GNU termcap
           does not).  Now suppose:

           *    a termcap entry before expansion is  more  than  1023
                bytes long,

           *    and the application has only allocated a 1k buffer,

           *    and  the  termcap library (like the one in BSD/OS 1.1
                and GNU) reads the whole entry into  the  buffer,  no
                matter  what  its length, to see if it's the entry it
                wants,

           *    and tgetent() is searching for a terminal  type  that
                either is the long entry, appears in the termcap file
                after the long entry, or doesn't appear in  the  file
                at  all  (so  that  tgetent() has to search the whole
                termcap file).

           Then tgetent() will overwrite memory, perhaps  its  stack,
           and  probably core dump the program.  Programs like telnet
           are particularly vulnerable;  modern  telnets  pass  along
           values  like the terminal type automatically.  The results
           are almost as undesirable with  a  termcap  library,  like
           SunOS  4.1.3  and Ultrix 4.4, that prints warning messages
           when it reads an overly long termcap entry.  If a  termcap
           library  truncates  long  entries,  like  OSF/1 3.0, it is
           immune to dying here but will return  incorrect  data  for
           the terminal.

           The "after tc expansion" length will have a similar effect
           to the above, but only for people who actually set TERM to
           that  terminal type, since tgetent() only does "tc" expan-
           sion once it's found the terminal type it was looking for,
           not while searching.

           In summary, a termcap entry that is longer than 1023 bytes
           can cause, on various combinations  of  termcap  libraries
           and  applications,  a  core  dump,  warnings, or incorrect
           operation.  If it's too long even before  "tc"  expansion,
           it will have this effect even for users of some other ter-
           minal types and users whose TERM variable does not have  a
           termcap entry.

           When in -C (translate to termcap) mode, the ncurses imple-
           mentation of tic(1) issues warning messages when the  pre-
           tc  length  of  a termcap translation is too long.  The -c
           (check) option also checks resolved (after  tc  expansion)
           lengths.

       Binary Compatibility
           It  is not wise to count on portability of binary terminfo
           entries between commercial UNIX versions.  The problem  is
           that  there  are  at least two versions of terminfo (under
           HP-UX and AIX) which diverged from System V terminfo after
           SVr1,  and have added extension capabilities to the string
           table that (in the binary format) collide  with  System  V
           and XSI Curses extensions.

## EXTENSIONS

           Some  SVr4  curses  implementations,  and  all previous to
           SVr4, don't interpret the %A and %O operators in parameter
           strings.
           SVr4/XPG4  do  not  specify whether msgr licenses movement
           while in an alternate-character-set mode (such modes  may,
           among other things, map CR and NL to characters that don't
           trigger  local  motions).   The   ncurses   implementation
           ignores  msgr  in ALTCHARSET mode.  This raises the possi-
           bility that an XPG4  implementation  making  the  opposite
           interpretation  may need terminfo entries made for ncurses
           to have msgr turned off.

           The ncurses library handles insert-character  and  insert-
           character modes in a slightly non-standard way to get bet-
           ter update efficiency.  See  the  Insert/Delete  Character
           subsection above.

           The   parameter   substitutions  for  set_clock  and  dis-
           play_clock are not documented in SVr4 or  the  XSI  Curses
           standard.  They are deduced from the documentation for the
           AT&T 505 terminal.

           Be careful assigning the kmous  capability.   The  ncurses
           wants  to  interpret it as KEY_MOUSE, for use by terminals
           and emulators like xterm that  can  return  mouse-tracking
           information in the keyboard-input stream.

           Different  commercial ports of terminfo and curses support
           different subsets of the XSI Curses standard and (in  some
           cases) different extension sets.  Here is a summary, accu-
           rate as of October 1995:

           SVR4, Solaris, ncurses -- These support all SVr4 capabili-
           ties.

           SGI  --  Supports  the  SVr4  set,  adds  one undocumented
           extended string capability (set_pglen).

           SVr1, Ultrix -- These support a restricted subset of  ter-
           minfo  capabilities.   The booleans end with xon_xoff; the
           numerics with  width_status_line;  and  the  strings  with
           prtr_non.

           HP/UX  --  Supports  the  SVr1  subset,  plus the SVr[234]
           numerics num_labels, label_height, label_width, plus func-
           tion  keys  11  through  63, plus plab_norm, label_on, and
           label_off, plus some incompatible extensions in the string
           table.

           AIX  --  Supports  the  SVr1 subset, plus function keys 11
           through 63, plus a number  of  incompatible  string  table
           extensions.

           OSF  -- Supports both the SVr4 set and the AIX extensions.

## FILES

           /usr/share/terminfo/?/*  files     containing     terminal
                                    descriptions

## SEE ALSO

           tic(1m), curses(3x), printf(3S), term(5).

## AUTHORS

           Zeyd  M.  Ben-Halim,  Eric  S.  Raymond, Thomas E. Dickey.
           Based on pcurses by Pavel Curtis.