.\" Copyright (c) 1985, 1991, 1993, 1994 .\" The Regents of the University of California. All rights reserved. .\" .\" Redistribution and use in source and binary forms, with or without .\" modification, are permitted provided that the following conditions .\" are met: .\" 1. Redistributions of source code must retain the above copyright .\" notice, this list of conditions and the following disclaimer. .\" 2. Redistributions in binary form must reproduce the above copyright .\" notice, this list of conditions and the following disclaimer in the .\" documentation and/or other materials provided with the distribution. .\" 3. All advertising materials mentioning features or use of this software .\" must display the following acknowledgement: .\" This product includes software developed by the University of .\" California, Berkeley and its contributors. .\" 4. Neither the name of the University nor the names of its contributors .\" may be used to endorse or promote products derived from this software .\" without specific prior written permission. .\" .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF .\" SUCH DAMAGE. .\" .\" @(#)termcap.5 8.3 (Berkeley) 4/16/94 .\" .\" /*************************************************************************** .\" * COPYRIGHT NOTICE * .\" **************************************************************************** .\" * ncurses is copyright (C) 1992-1995 * .\" * Zeyd M. Ben-Halim * .\" * zmbenhal@netcom.com * .\" * Eric S. Raymond * .\" * esr@snark.thyrsus.com * .\" * * .\" * Permission is hereby granted to reproduce and distribute ncurses * .\" * by any means and for any fee, whether alone or as part of a * .\" * larger distribution, in source or in binary form, PROVIDED * .\" * this notice is included with any such distribution, and is not * .\" * removed from any of its header files. Mention of ncurses in any * .\" * applications linked with it is highly appreciated. * .\" * * .\" * ncurses comes AS IS with no warranty, implied or expressed. * .\" * * .\" ***************************************************************************/ .\" .\" $FreeBSD: src/share/termcap/termcap.5,v 1.12.2.6 2002/08/15 08:30:27 ru Exp $ .\" $DragonFly: src/share/termcap/termcap.5,v 1.4 2006/04/17 18:01:37 swildner Exp $ .\" .Dd April 16, 1994 .Dt TERMCAP 5 .Os .Sh NAME .Nm termcap .Nd terminal capability data base .Sh SYNOPSIS .Nm .Sh DESCRIPTION The .Nm file is a data base describing terminals, used, for example, by .Xr \&vi 1 and .Xr ncurses 3 . Terminals are described in .Nm by giving a set of capabilities that they have and by describing how operations are performed. Padding requirements and initialization sequences are included in .Nm . .Pp Entries in .Nm consist of a number of `:'-separated fields. The first entry for each terminal gives the names that 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 characters and blanks for readability. .Pp 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 chosen, thus .Dq hp2621 This name should not contain hyphens. Modes that the hardware can be in or user preferences should be indicated by appending a hyphen and an indicator of the mode. Therefore, a .Dq vt100 in 132-column mode would be .Dq vt100-w . The following suffixes should be used where possible: .Pp .Bl -column indent "With automatic margins (usually default)xx" -offset indent .Sy "Suffix Meaning Example" -w Wide mode (more than 80 columns) vt100-w -am With automatic margins (usually default) vt100-am -nam Without automatic margins vt100-nam .Pf \- Ar n Ta No "Number of lines on screen aaa-60" -na No arrow keys (leave them in local) concept100-na .Pf \- Ar \&np Ta No "Number of pages of memory concept100-4p" -rv Reverse video concept100-rv .El .Sh CAPABILITIES The description field attempts to convey the semantics of the capability. You may find some codes in the description field: .Pp .Bl -tag -width #[1-9] .It (P) indicates that padding may be specified. .It #[1-9] in the description field indicates that the string is passed through .Xr tparm 3 or .Xr tgoto 3 with parms as given (#\fIi\fP). .It (P*) indicates that padding may vary in proportion to the number of lines affected. .It (#\d\fIi\fP\u) indicates the \fIi\fP\uth\d parameter. .El .Pp These are the boolean capabilities: .Bd -literal \fBBoolean TCap Description\fR \fBVariables Code\fR auto_left_margin bw cursor_left wraps from column 0 to last column auto_right_margin am terminal has automatic margins no_esc_ctlc xb beehive (f1=escape, f2=ctrl C) ceol_standout_glitch xs standout not erased by overwriting (hp) eat_newline_glitch xn newline ignored after 80 cols (concept) erase_overstrike eo can erase overstrikes with a blank generic_type gn generic line type hard_copy hc hardcopy terminal has_meta_key km Has a meta key, sets msb high has_status_line hs has extra status line insert_null_glitch in insert mode distinguishes nulls memory_above da display may be retained above the screen memory_below db display may be retained below the screen move_insert_mode mi safe to move while in insert mode move_standout_mode ms safe to move while in standout mode over_strike os terminal can overstrike status_line_esc_ok es escape can be used on the status line dest_tabs_magic_smso xt tabs destructive, magic so char (t1061) tilde_glitch hz can't print ~'s (hazeltine) transparent_underline ul underline character overstrikes xon_xoff xo terminal uses xon/xoff handshaking needs_xon_xoff nx padding won't work, xon/xoff required prtr_silent 5i printer won't echo on screen hard_cursor HC cursor is hard to see non_rev_rmcup NR enter_ca_mode does not reverse exit_ca_mode no_pad_char NP pad character does not exist non_dest_scroll_region ND scrolling region is non-destructive can_change cc terminal can re-define existing colors back_color_erase ut screen erased with background color hue_lightness_saturation hl terminal uses only HLS color notation (tektronix) col_addr_glitch YA only positive motion for column address and micro_column_address caps cr_cancels_micro_mode YB using cr turns off micro mode has_print_wheel YC printer needs operator to change character set row_addr_glitch YD only positive motion for row_address and micro_row_address caps semi_auto_right_margin YE printing in last column causes cr cpi_changes_res YF changing character pitch changes resolution lpi_changes_res YG changing line pitch changes resolution .Ed .Pp These are the numeric capabilities: .Bd -literal \fBNumeric TCap Description\fR \fBVariables Code\fR columns co number of columns in aline init_tabs it tabs initially every # spaces lines li number of lines on screen or page lines_of_memory lm lines of memory if > line. 0 => varies magic_cookie_glitch sg number of blank chars left by enter_standout_mode or exit_standout_mode padding_baud_rate pb lowest baud rate where padding needed virtual_terminal vt virtual terminal number (CB/unix) width_status_line ws columns in status line num_labels Nl number of labels on screen label_height lh rows in each label label_width lw columns in each label max_attributes ma maximum combined attributes terminal can handle maximum_windows MW maximum number of definable windows magic_cookie_glitch_ul ug number of blanks left by underline # # These came in with SVr4's color support # max_colors Co maximum numbers of colors on screen max_pairs pa maximum number of color-pairs on the screen no_color_video NC video attributes that can't be used with colors # # 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. # buffer_capacity Ya numbers of bytes buffered before printing dot_vert_spacing Yb spacing of pins vertically in pins per inch dot_horz_spacing Yc spacing of dots horizontally in dots per inch max_micro_address Yd maximum value in micro_..._address max_micro_jump Ye maximum value in parm_..._micro micro_char_size Yf character size when in micro mode micro_line_size Yg line size when in micro mode number_of_pins Yh numbers of pins in print-head output_res_char Yi horizontal resolution in units per line output_res_line Yj vertical resolution in units per line output_res_horz_inch Yk horizontal resolution in units per inch output_res_vert_inch Yl vertical resolution in units per inch print_rate Ym print rate in chars per second wide_char_size Yn character step size when in double wide mode buttons BT number of buttons on mouse bit_image_entwining Yo number of passed for each bit-image row bit_image_type Yp type of bit-image device .Ed .Pp These are the string capabilities: .Bd -literal \fBString TCap Description\fR \fBVariables Code\fR back_tab bt back tab (P) bell bl audible signal (bell) (P) carriage_return cr carriage return (P*) change_scroll_region cs change region to line #1 to line #2 (P) clear_all_tabs ct clear all tab stops (P) clear_screen cl clear screen and home cursor (P*) clr_eol ce clear to end of line (P) clr_eos cd clear to end of screen (P*) column_address ch horizontal position #1, absolute (P) command_character CC terminal settable cmd character in prototype cursor_address cm move to row #1 columns #2 cursor_down do down one line cursor_home ho home cursor cursor_invisible vi make cursor invisible cursor_left le move left one space cursor_mem_address CM memory relative cursor addressing cursor_normal ve make cursor appear normal (undo cursor_invisible/cursor_visible) cursor_right nd move right one space cursor_to_ll ll last line, first column cursor_up up up one line cursor_visible vs make cursor very visible delete_character dc delete character (P*) delete_line dl delete line (P*) dis_status_line ds disable status line down_half_line hd half a line down enter_alt_charset_mode as start alternate character set (P) enter_blink_mode mb turn on blinking enter_bold_mode md turn on bold (extra bright) mode enter_ca_mode ti string to start programs using cursor_address enter_delete_mode dm enter delete mode enter_dim_mode mh turn on half-bright mode enter_insert_mode im enter insert mode enter_secure_mode mk turn on blank mode (characters invisible) enter_protected_mode mp turn on protected mode enter_reverse_mode mr turn on reverse video mode enter_standout_mode so begin standout mode enter_underline_mode us begin underline mode erase_chars ec erase #1 characters (P) exit_alt_charset_mode ae end alternate character set (P) exit_attribute_mode me turn off all attributes exit_ca_mode te strings to end programs using cup exit_delete_mode ed end delete mode exit_insert_mode ei exit insert mode exit_standout_mode se exit standout mode exit_underline_mode ue exit underline mode flash_screen vb visible bell (may not move cursor) form_feed ff hardcopy terminal page eject (P*) from_status_line fs return from status line init_1string i1 initialization string init_2string is initialization string init_3string i3 initialization string init_file if name of initialization file insert_character ic insert character (P) insert_line al insert line (P*) insert_padding ip insert padding after inserted character key_backspace kb backspace key key_catab ka clear-all-tabs key key_clear kC clear-screen or erase key key_ctab kt clear-tab key key_dc kD delete-character key key_dl kL delete-line key key_down kd down-arrow key key_eic kM sent by rmir or smir in insert mode key_eol kE clear-to-end-of-line key key_eos kS clear-to-end-of-screen key key_f0 k0 F0 function key key_f1 k1 F1 function key key_f10 k; F10 function key key_f2 k2 F2 function key key_f3 k3 F3 function key key_f4 k4 F4 function key key_f5 k5 F5 function key key_f6 k6 F6 function key key_f7 k7 F7 function key key_f8 k8 F8 function key key_f9 k9 F9 function key key_home kh home key key_ic kI insert-character key key_il kA insert-line key key_left kl left-arrow key key_ll kH last-line key key_npage kN next-page key key_ppage kP prev-page key key_right kr right-arrow key key_sf kF scroll-forward key key_sr kR scroll-backward key key_stab kT set-tab key key_up ku up-arrow key keypad_local ke leave 'keyboard_transmit' mode keypad_xmit ks enter 'keyboard_transmit' mode lab_f0 l0 label on function key f0 if not f0 lab_f1 l1 label on function key f1 if not f1 lab_f10 la label on function key f10 if not f10 lab_f2 l2 label on function key f2 if not f2 lab_f3 l3 label on function key f3 if not f3 lab_f4 l4 label on function key f4 if not f4 lab_f5 l5 label on function key f5 if not f5 lab_f6 l6 label on function key f6 if not f6 lab_f7 l7 label on function key f7 if not f7 lab_f8 l8 label on function key f8 if not f8 lab_f9 l9 label on function key f9 if not f9 meta_off mo turn off meta mode meta_on mm turn on meta mode (8th-bit on) newline nw newline (behave like cr followed by lf) pad_char pc padding char (instead of null) parm_dch DC delete #1 chars (P*) parm_delete_line DL delete #1 lines (P*) parm_down_cursor DO down #1 lines (P*) parm_ich IC insert #1 chars (P*) parm_index SF scroll forward #1 lines (P) parm_insert_line AL insert #1 lines (P*) parm_left_cursor LE move #1 chars to the left (P) parm_right_cursor RI move #1 chars to the right (P*) parm_rindex SR scroll back #1 lines (P) parm_up_cursor UP up #1 lines (P*) pkey_key pk program function key #1 to type string #2 pkey_local pl program function key #1 to execute string #2 pkey_xmit px program function key #1 to transmit string #2 print_screen ps print contents of screen prtr_off pf turn off printer prtr_on po turn on printer repeat_char rp repeat char #1 #2 times (P*) reset_1string r1 reset string reset_2string r2 reset string reset_3string r3 reset string reset_file rf name of reset file restore_cursor rc restore cursor to last position of save_cursor row_address cv vertical position #1 absolute (P) save_cursor sc save current cursor position (P) scroll_forward sf scroll text up (P) scroll_reverse sr scroll text down (P) set_attributes sa define video attributes #1-#9 (PG9) set_tab st set a tab in every row, current columns set_window wi current window is lines #1-#2 cols #3-#4 tab ta tab to next 8-space hardware tab stop to_status_line ts move to status line underline_char uc underline char and move past it up_half_line hu half a line up init_prog iP path name of program for initialization key_a1 K1 upper left of keypad key_a3 K3 upper right of keypad key_b2 K2 center of keypad key_c1 K4 lower left of keypad key_c3 K5 lower right of keypad prtr_non pO turn on printer for #1 bytes termcap_init2 i2 secondary initialization string termcap_reset rs terminal reset string # # SVr1 capabilities stop here. IBM's version of terminfo is the same as # SVr4 up to this point, but has a different set afterwards. # char_padding rP like insert_padding but when in insert mode acs_chars ac graphics charset pairs - def=vt100 plab_norm pn program label #1 to show string #2 key_btab kB back-tab key enter_xon_mode SX turn on xon/xoff handshaking exit_xon_mode RX turn off xon/xoff handshaking enter_am_mode SA turn on automatic margins exit_am_mode RA turn off automatic margins xon_character XN XON character xoff_character XF XOFF character ena_acs eA enable alternate char set label_on LO turn on soft labels label_off LF turn off soft labels key_beg @1 begin key key_cancel @2 cancel key key_close @3 close key key_command @4 command key key_copy @5 copy key key_create @6 create key key_end @7 end key key_enter @8 enter/send key key_exit @9 exit key key_find @0 find key key_help %1 help key key_mark %2 mark key key_message %3 message key key_move %4 move key key_next %5 next key key_open %6 open key key_options %7 options key key_previous %8 previous key key_print %9 print key key_redo %0 redo key key_reference &1 reference key key_refresh &2 refresh key key_replace &3 replace key key_restart &4 restart key key_resume &5 resume key key_save &6 save key key_suspend &7 suspend key key_undo &8 undo key key_sbeg &9 shifted key key_scancel &0 shifted key key_scommand *1 shifted key key_scopy *2 shifted key key_screate *3 shifted key key_sdc *4 shifted key key_sdl *5 shifted key key_select *6 select key key_send *7 shifted key key_seol *8 shifted key key_sexit *9 shifted key key_sfind *0 shifted key key_shelp #1 shifted key key_shome #2 shifted key key_sic #3 shifted key key_sleft #4 shifted key key_smessage %a shifted key key_smove %b shifted key key_snext %c shifted key key_soptions %d shifted key key_sprevious %e shifted key key_sprint %f shifted key key_sredo %g shifted key key_sreplace %h shifted key key_sright %i shifted key key_srsume %j shifted key key_ssave !1 shifted key key_ssuspend !2 shifted key key_sundo !3 shifted key req_for_input RF send next input char (for ptys) key_f11 F1 F11 function key key_f12 F2 F12 function key key_f13 F3 F13 function key key_f14 F4 F14 function key key_f15 F5 F15 function key key_f16 F6 F16 function key key_f17 F7 F17 function key key_f18 F8 F18 function key key_f19 F9 F19 function key key_f20 FA F20 function key key_f21 FB F21 function key key_f22 FC F22 function key key_f23 FD F23 function key key_f24 FE F24 function key key_f25 FF F25 function key key_f26 FG F26 function key key_f27 FH F27 function key key_f28 FI F28 function key key_f29 FJ F29 function key key_f30 FK F30 function key key_f31 FL F31 function key key_f32 FM F32 function key key_f33 FN F33 function key key_f34 FO F34 function key key_f35 FP F35 function key key_f36 FQ F36 function key key_f37 FR F37 function key key_f38 FS F38 function key key_f39 FT F39 function key key_f40 FU F40 function key key_f41 FV F41 function key key_f42 FW F42 function key key_f43 FX F43 function key key_f44 FY F44 function key key_f45 FZ F45 function key key_f46 Fa F46 function key key_f47 Fb F47 function key key_f48 Fc F48 function key key_f49 Fd F49 function key key_f50 Fe F50 function key key_f51 Ff F51 function key key_f52 Fg F52 function key key_f53 Fh F53 function key key_f54 Fi F54 function key key_f55 Fj F55 function key key_f56 Fk F56 function key key_f57 Fl F57 function key key_f58 Fm F58 function key key_f59 Fn F59 function key key_f60 Fo F60 function key key_f61 Fp F61 function key key_f62 Fq F62 function key key_f63 Fr F63 function key clr_bol cb Clear to beginning of line clear_margins MC clear right and left soft margins set_left_margin ML set left soft margin set_right_margin MR set right soft margin label_format Lf label format set_clock SC set clock, #1 hrs #2 mins #3 secs display_clock DK display clock at (#1,#2) remove_clock RC remove clock create_window CW define a window #1 from #2, #3 to #4, #5 goto_window WG go to window #1 hangup HU hang-up phone dial_phone DI dial number #1 quick_dial QD dial number #1 without checking tone TO select touch tone dialing pulse PU select pulse dialling flash_hook fh flash switch hook fixed_pause PA pause for 2-3 seconds wait_tone WA wait for dial-tone user0 u0 User string #0 user1 u1 User string #1 user2 u2 User string #2 user3 u3 User string #3 user4 u4 User string #4 user5 u5 User string #5 user6 u6 User string #6 user7 u7 User string #7 user8 u8 User string #8 user9 u9 User string #9 # # SVr4 added these capabilities to support color # orig_pair op Set default pair to its original value orig_colors oc Set all color pairs to the original ones initialize_color Ic initialize color #1 to (#2,#3,#4) initialize_pair Ip Initialize color pair #1 to fg=(#2,#3,#4), bg=(#5,#6,#7) set_color_pair sp Set current color pair to #1 set_foreground Sf Set foreground color #1 set_background Sb Set background color #1 # # SVr4 added these capabilities to support printers # change_char_pitch ZA Change number of characters per inch change_line_pitch ZB Change number of lines per inch change_res_horz ZC Change horizontal resolution change_res_vert ZD Change vertical resolution define_char ZE Define a character enter_doublewide_mode ZF Enter double-wide mode enter_draft_quality ZG Enter draft-quality mode enter_italics_mode ZH Enter italic mode enter_leftward_mode ZI Start leftward carriage motion enter_micro_mode ZJ Start micro-motion mode enter_near_letter_quality ZK Enter NLQ mode enter_normal_quality ZL Enter normal-quality mode enter_shadow_mode ZM Enter shadow-print mode enter_subscript_mode ZN Enter subscript mode enter_superscript_mode ZO Enter superscript mode enter_upward_mode ZP Start upward carriage motion exit_doublewide_mode ZQ End double-wide mode exit_italics_mode ZR End italic mode exit_leftward_mode ZS End left-motion mode exit_micro_mode ZT End micro-motion mode exit_shadow_mode ZU End shadow-print mode exit_subscript_mode ZV End subscript mode exit_superscript_mode ZW End superscript mode exit_upward_mode ZX End reverse character motion micro_column_address ZY Like column_address in micro mode micro_down ZZ Like cursor_down in micro mode micro_left Za Like cursor_left in micro mode micro_right Zb Like cursor_right in micro mode micro_row_address Zc Like row_address in micro mode micro_up Zd Like cursor_up in micro mode order_of_pins Ze Match software bits to print-head pins parm_down_micro Zf Like parm_down_cursor in micro mode parm_left_micro Zg Like parm_left_cursor in micro mode parm_right_micro Zh Like parm_right_cursor in micro mode parm_up_micro Zi Like parm_up_cursor in micro mode select_char_set Zj Select character set set_bottom_margin Zk Set bottom margin at current line set_bottom_margin_parm Zl Set bottom margin at line #1 or #2 lines from bottom set_left_margin_parm Zm Set left (right) margin at column #1 (#2) set_right_margin_parm Zn Set right margin at column #1 set_top_margin Zo Set top margin at current line set_top_margin_parm Zp Set top (bottom) margin at row #1 (#2) start_bit_image Zq Start printing bit image graphics start_char_set_def Zr Start character set definition stop_bit_image Zs Stop printing bit image graphics stop_char_set_def Zt End definition of character aet subscript_characters Zu List of subscriptible characters superscript_characters Zv List of superscriptible characters these_cause_cr Zw Printing any of these chars causes CR zero_motion Zx No motion for subsequent character # # The following string capabilities are present in the SVr4.0 term # structure, but are not documented in the man page. # char_set_names Zy List of character set names key_mouse Km Mouse event has occurred mouse_info Mi Mouse status information req_mouse_pos RQ Request mouse position get_mouse Gm Curses should get button events set_a_foreground AF Set ANSI foreground color set_a_background AB Set ANSI background color pkey_plab xl Program function key #1 to type string #2 and show string #3 device_type dv Indicate language/codeset support code_set_init ci Init sequence for multiple codesets set0_des_seq s0 Shift to code set 0 (EUC set 0, ASCII) set1_des_seq s1 Shift to code set 1 set2_des_seq s2 Shift to code set 2 set3_des_seq s3 Shift to code set 3 set_lr_margin ML Set both left and right margins to #1, #2 set_tb_margin MT Sets both top and bottom margins to #1, #2 bit_image_repeat Xy Repeat bit image cell #1 #2 times bit_image_newline Zz Move to next row of the bit image bit_image_carriage_return Yv Move to beginning of same row color_names Yw Give name for color #1 define_bit_image_region Yx Define rectangular bit image region end_bit_image_region Yy End a bit-image region set_color_band Yz Change to ribbon color #1 set_page_length YZ Set page length to #1 lines # # SVr4 added these capabilities for direct PC-clone support # display_pc_char S1 Display PC character enter_pc_charset_mode S2 Enter PC character display mode exit_pc_charset_mode S3 Exit PC character display mode enter_scancode_mode S4 Enter PC scancode mode exit_scancode_mode S5 Exit PC scancode mode pc_term_options S6 PC terminal options scancode_escape S7 Escape for scancode emulation alt_scancode_esc S8 Alternate escape for scancode emulation # # The XSI Curses standard added these. # enter_horizontal_hl_mode Xh Enter horizontal highlight mode enter_left_hl_mode Xl Enter left highlight mode enter_low_hl_mode Xo Enter low highlight mode enter_right_hl_mode Xr Enter right highlight mode enter_top_hl_mode Xt Enter top highlight mode enter_vertical_hl_mode Xv Enter vertical highlight mode .Ed .Pp Obsolete termcap capabilities. New software should not rely on them at all. .Bd -literal \fBBoolean TCap Description\fR \fBVariables Code\fR linefeed_is_newline NL move down with ^J even_parity EP terminal requires even parity odd_parity OP terminal requires odd parity half_duplex HD terminal is half-duplex lower_case_only LC terminal has only lower case upper_case_only UC terminal has only upper case has_hardware_tabs pt has 8-char tabs invoked with ^I return_does_clr_eol xr return clears the line tek_4025_insert_line xx Tektronix 4025 insert-line glitch backspaces_with_bs bs uses ^H to move left crt_no_scrolling ns crt cannot scroll no_correctly_working_cr nc no way to go to start of line .Ed .Bd -literal \fBNumber TCap Description\fR \fBVariables Code\fR backspace_delay dB padding required for ^H form_feed_delay dF padding required for ^L horizontal_tab_delay dT padding required for ^I vertical_tab_delay dV padding required for ^V number_of_function_keys kn count of function keys carriage_return_delay dC pad needed for CR new_line_delay dN pad needed for LF .Ed .Bd -literal \fBString TCap Description\fR \fBVariables Code\fR other_non_function_keys ko list of self-mapped keycaps arrow_key_map ma map arrow keys memory_lock_above ml lock visible screen memory above the current line memory_unlock mu unlock visible screen memory above the current line linefeed_if_not_lf nl use to move down backspace_if_not_bs bc move left, if not ^H .Ed .Ss A Sample Entry The following entry, which describes the Concept\-100, is among the more complex entries in the .Nm file as of this writing. .Pp .Bd -literal ca\||\|concept100\||\|c100\||\|concept\||\|c104\||\|concept100-4p\||\|HDS Concept\-100:\e :al=3*\eE^R:am:bl=^G:cd=16*\eE^C:ce=16\eE^U:cl=2*^L:cm=\eEa%+ %+ :\e :co#80:.cr=9^M:db:dc=16\eE^A:dl=3*\eE^B:do=^J:ei=\eE\e200:eo:im=\eE^P:in:\e :ip=16*:is=\eEU\eEf\eE7\eE5\eE8\eEl\eENH\eEK\eE\e200\eEo&\e200\eEo\e47\eE:k1=\eE5:\e :k2=\eE6:k3=\eE7:kb=^h:kd=\eE<:ke=\eEx:kh=\eE?:kl=\eE>:kr=\eE=:ks=\eEX:\e :ku=\eE;:le=^H:li#24:mb=\eEC:me=\eEN\e200:mh=\eEE:mi:mk=\eEH:mp=\eEI:\e :mr=\eED:nd=\eE=:pb#9600:rp=0.2*\eEr%.%+ :se=\eEd\eEe:sf=^J:so=\eEE\eED:\e :.ta=8\et:te=\eEv \e200\e200\e200\e200\e200\e200\eEp\er\en:\e :ti=\eEU\eEv 8p\eEp\er:ue=\eEg:ul:up=\eE;:us=\eEG:\e :vb=\eEk\e200\e200\e200\e200\e200\e200\e200\e200\e200\e200\e200\e200\e200\e200\eEK:\e :ve=\eEw:vs=\eEW:vt#8:xn:\e :bs:cr=^M:dC#9:dT#8:nl=^J:ta=^I:pt: .Ed .Pp Entries may continue onto multiple lines by giving a \e as the last character of a line, and empty fields may be included for readability (here between the last field on a line and the first field on the next). Comments may be included on lines beginning with .Dq # . .Ss Types of Capabilities Capabilities in .Nm are of three types: Boolean capabilities, which indicate particular features that the terminal has; numeric capabilities, giving the size of the display or the size of other attributes; and string capabilities, which give character sequences that can be used to perform particular terminal operations. All capabilities have two-letter codes. For instance, the fact that the Concept has .Em automatic margins (an automatic return and linefeed when the end of a line is reached) is indicated by the Boolean capability .Sy \&am . Hence the description of the Concept includes .Sy \&am . .Pp Numeric capabilities are followed by the character `#' then the value. In the example above .Sy \&co , which indicates the number of columns the display has, gives the value `80' for the Concept. .Pp Finally, string-valued capabilities, such as .Sy \&ce (clear-to-end-of-line sequence) are given by the two-letter code, an `=', then a string ending at the next following `:'. A delay in milliseconds may appear after the `=' in such a capability, which causes padding characters to be supplied by .Xr tputs 3 after the remainder of the string is sent to provide this delay. The delay can be either a number, such as `20', or a number followed by an `*', such as `3*'. An `*' indicates that the padding required is proportional to the number of lines affected by the operation, and the amount given is the per-affected-line padding required. (In the case of insert-character, the factor is still the number of .Em lines affected; this is always 1 unless the terminal has .Sy \&in and the software uses it.) When an `*' is specified, it is sometimes useful to give a delay of the form `3.5' to specify a delay per line to tenths of milliseconds. (Only one decimal place is allowed.) .Pp A number of escape sequences are provided in the string-valued capabilities for easy encoding of control characters there. .Sy \&\eE maps to an .Dv ESC character, .Sy \&^X maps to a control-X for any appropriate X, and the sequences .Sy \&\en .Sy \&\er .Sy \&\et .Sy \&\eb .Sy \&\ef map to linefeed, return, tab, backspace, and formfeed, respectively. Finally, characters may be given as three octal digits after a .Sy \&\e , and the characters .Sy \&^ and .Sy \&\e may be given as .Sy \&\e^ and .Sy \&\e\e . If it is necessary to place a .Sy \&: in a capability it must be escaped as .Sy \e: or be encoded as .Sy \&\e072 . If it is necessary to place a .Dv NUL character in a string capability it must be encoded as .Sy \&\e200 . (The routines that deal with .Nm use C strings and strip the high bits of the output very late, so that a .Sy \&\e200 comes out as a .Sy \&\e000 would.) .Pp Sometimes individual capabilities must be commented out. To do this, put a period before the capability name. For example, see the first .Sy \&cr and .Sy \&ta in the example above. .Ss Preparing Descriptions The most effective way to prepare a terminal description is by imitating the description of a similar terminal in .Nm and to build up a description gradually, using partial descriptions with .Xr \&vi 1 to check that they are correct. Be aware that a very unusual terminal may expose deficiencies in the ability of the .Nm file to describe it or bugs in .Xr \&vi 1 . To easily test a new terminal description you are working on you can put it in your home directory in a file called .Pa .termcap and programs will look there before looking in .Pa /usr/share/misc/termcap . You can also set the environment variable .Ev TERMPATH to a list of absolute file pathnames (separated by spaces or colons), one of which contains the description you are working on, and programs will search them in the order listed, and nowhere else. See .Xr termcap 3 . The .Ev TERMCAP environment variable is usually set to the .Nm entry itself to avoid reading files when starting up a program. .Pp To get the padding for insert-line right (if the terminal manufacturer did not document it), a severe test is to use .Xr \&vi 1 to edit .Pa /etc/passwd at 9600 baud, delete roughly 16 lines from the middle of the screen, then hit the `u' key several times quickly. If the display messes up, more padding is usually needed. A similar test can be used for insert-character. .Ss Basic Capabilities The number of columns on each line of the display is given by the .Sy \&co numeric capability. If the display is a .Tn CRT , then the number of lines on the screen is given by the .Sy \&li capability. If the display wraps around to the beginning of the next line when the cursor reaches the right margin, then it should have the .Sy \&am capability. If the terminal can clear its screen, the code to do this is given by the .Sy \&cl string capability. If the terminal overstrikes (rather than clearing the position when a character is overwritten), it should have the .Sy \&os capability. If the terminal is a printing terminal, with no soft copy unit, give it both .Sy \&hc and .Sy \&os . .Pf ( Sy \&os applies to storage scope terminals, such as the Tektronix 4010 series, as well as to hard copy and .Tn APL terminals.) If there is a code to move the cursor to the left edge of the current row, give this as .Sy \&cr . (Normally this will be carriage-return, .Sy \&^M . ) If there is a code to produce an audible signal (bell, beep, etc.), give this as .Sy \&bl . .Pp If there is a code (such as backspace) to move the cursor one position to the left, that capability should be given as .Sy \&le . Similarly, codes to move to the right, up, and down should be given as .Sy \&nd , .Sy \&up , and .Sy \&do , respectively. These .Em local cursor motions should not alter the text they pass over; for example, you would not normally use .Dq nd=\ \& unless the terminal has the .Sy \&os capability, because the space would erase the character moved over. .Pp A very important point here is that the local cursor motions encoded in .Nm have undefined behavior at the left and top edges of a .Tn CRT display. Programs should never attempt to backspace around the left edge, unless .Sy \&bw is given, and never attempt to go up off the top using local cursor motions. .Pp In order to scroll text up, a program goes to the bottom left corner of the screen and sends the .Sy \&sf (index) string. To scroll text down, a program goes to the top left corner of the screen and sends the .Sy \&sr (reverse index) string. The strings .Sy \&sf and .Sy \&sr have undefined behavior when not on their respective corners of the screen. Parameterized versions of the scrolling sequences are .Sy \&SF and .Sy \&SR , which have the same semantics as .Sy \&sf and .Sy \&sr except that they take one parameter and scroll that many lines. They also have undefined behavior except at the appropriate corner of the screen. .Pp The .Sy \&am capability tells whether the cursor sticks at the right edge of the screen when text is output there, but this does not necessarily apply to .Sy \&nd from the last column. Leftward local motion is defined from the left edge only when .Sy \&bw is given; then an .Sy \&le from the left edge will move to the right edge of the previous row. This is useful for drawing a box around the edge of the screen, for example. If the terminal has switch-selectable automatic margins, the .Nm description usually assumes that this feature is on, .Em i.e . , .Sy \&am . If the terminal has a command that moves to the first column of the next line, that command can be given as .Sy \&nw (newline). It is permissible for this to clear the remainder of the current line, so if the terminal has no correctly-working .Tn \&CR and .Tn \&LF it may still be possible to craft a working .Sy \&nw out of one or both of them. .Pp These capabilities suffice to describe hardcopy and .Dq glass-tty terminals. Thus the Teletype model 33 is described as .Bd -literal -offset indent T3\||\|tty33\||\|33\||\|tty\||\|Teletype model 33:\e :bl=^G:co#72:cr=^M:do=^J:hc:os: .Ed .Pp and the Lear Siegler .Tn ADM Ns \-3 is described as .Bd -literal -offset indent l3\||\|adm3\||\|3\||\|LSI \s-1ADM\s0-3:\e :am:bl=^G:cl=^Z:co#80:cr=^M:do=^J:le=^H:li#24:sf=^J: .Ed .Ss Parameterized Strings Cursor addressing and other strings requiring parameters are described by a parameterized string capability, with .Xr printf 3 Ns \-like escapes .Sy \&%x in it, while other characters are passed through unchanged. For example, to address the cursor the .Sy \&cm capability is given, using two parameters: the row and column to move 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 an analogous .Sy \&CM capability.) .Pp The .Sy \&% encodings have the following meanings: .Bl -column xxxxx .It "%% output `%'" .It "%d output value as in" .Xr printf 3 %d .It "%2 output value as in" .Xr printf 3 %2d .It "%3 output value as in" .Xr printf 3 %3d .It "%. output value as in" .Xr printf 3 %c .It "%+" Ns Em x Ta No add .Em x to value, then do %. .It "%>" Ns Em \&xy Ta No if value > .Em x then add .Em y , no output .It "%r reverse order of two parameters, no output" .It "%i increment by one, no output" .It "%n exclusive-or all parameters with 0140 (Datamedia 2500)" .It "\&%B" Ta Tn BCD No "(16*(value/10)) + (value%10), no output" .It "%D Reverse coding (value \- 2*(value%16)), no output (Delta Data)." .El .Pp Consider the Hewlett-Packard 2645, which, to get to row 3 and column 12, needs to be sent .Dq \eE&a12c03Y padded for 6 milliseconds. Note that the order of the row and column coordinates is reversed here and that the row and column are sent as two-digit integers. Thus its .Sy \&cm capability is .Dq Li cm=6\eE&%r%2c%2Y . .Pp The Datamedia 2500 needs the current row and column sent encoded in binary using .Dq \&%. . Terminals that use .Dq %.\& need to be able to backspace the cursor .Pq Sy \&le and to move the cursor up one line on the screen .Pq Sy \&up . This is necessary because it is not always safe to transmit .Sy \&\en , .Sy \&^D , and .Sy \&\er , as the system may change or discard them. (Programs using .Nm must set terminal modes so that tabs are not expanded, so .Sy \&\et is safe to send. This turns out to be essential for the Ann Arbor 4080.) .Pp A final example is the Lear Siegler .Tn ADM Ns \-3a , which offsets row and column by a blank character, thus .Dq Li cm=\eE=%+ %+\ \& . .Pp Row or column absolute cursor addressing can be given as single parameter capabilities .Sy \&ch (horizontal position absolute) and .Sy \&cv (vertical position absolute). Sometimes these are shorter than the more general two-parameter sequence (as with the Hewlett-Packard 2645) and can be used in preference to .Sy \&cm . If there are parameterized local motions .Pf ( Em e.g . , move .Ar n positions to the right) these can be given as .Sy \&DO , .Sy \&LE , .Sy \&RI , and .Sy \&UP with a single parameter indicating how many positions to move. These are primarily useful if the terminal does not have .Sy \&cm , such as the Tektronix 4025. .Ss Cursor Motions If the terminal has a fast way to home the cursor (to the very upper left corner of the screen), this can be given as .Sy \&ho . Similarly, a fast way of getting to the lower left-hand corner can be given as .Sy \&ll ; this may involve going up with .Sy \&up from the home position, but a program should never do this itself (unless .Sy \&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 cursor address (0,0): to the top left corner of the screen, not of memory. (Therefore, the .Dq \eEH sequence on Hewlett-Packard terminals cannot be used for .Sy \&ho . ) .Ss 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 .Sy \&ce . If the terminal can clear from the current position to the end of the display, this should be given as .Sy \&cd . .Sy \&cd must only be invoked from the first column of a line. (Therefore, it can be simulated by a request to delete a large number of lines, if a true .Sy \&cd is not available.) .Ss Insert/Delete Line If the terminal can open a new blank line before the line containing the cursor, this should be given as .Sy \&al ; this must be invoked only from the first position of a line. The cursor must then appear at the left of the newly blank line. If the terminal can delete the line that the cursor is on, this should be given as .Sy \&dl ; this must only be used from the first position on the line to be deleted. Versions of .Sy \&al and .Sy \&dl which take a single parameter and insert or delete that many lines can be given as .Sy \&AL and .Sy \&DL . If the terminal has a settable scrolling region (like the VT100), the command to set this can be described with the .Sy \&cs 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 this command \(em the .Sy \&sc and .Sy \&rc (save and restore cursor) commands are also useful. Inserting lines at the top or bottom of the screen can also be done using .Sy \&sr or .Sy \&sf on many terminals without a true insert/delete line, and is often faster even on terminals with those features. .Pp 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 .Sy \&wi . The four parameters are the starting and ending lines in memory and the starting and ending columns in memory, in that order. (This .Xr terminfo 5 capability is described for completeness. It is unlikely that any .Nm Ns \-using program will support it.) .Pp If the terminal can retain display memory above the screen, then the .Sy \&da capability should be given; if display memory can be retained below, then .Sy \&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 .Sy \&sr may bring down non-blank lines. .Ss Insert/Delete Character There are two basic kinds of intelligent terminals with respect to insert/delete character that can be described using .Nm . 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 then typing text separated by cursor motions. Type .Dq Li abc\ \ \ \ def using local cursor motions (not spaces) between the .Dq abc and the .Dq def . Then position the cursor before the .Dq 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 terminal does not distinguish between blanks and untyped positions. If the .Dq abc shifts over to the .Dq def which then move together around the end of the current line and onto the next as you insert, then you have the second type of terminal and should give the capability .Sy \&in , which stands for .Dq insert null . While these are two logically separate attributes (one line .Em \&vs . multi-line insert mode, and special treatment of untyped spaces), we have seen no terminals whose insert mode cannot be described with the single attribute. .Pp The .Nm entries can describe both terminals that have an insert mode and terminals that send a simple sequence to open a blank position on the current line. Give as .Sy \&im the sequence to get into insert mode. Give as .Sy \&ei the sequence to leave insert mode. Now give as .Sy \&ic any sequence that needs to be sent just before each character to be inserted. Most terminals with a true insert mode will not give .Sy \&ic ; terminals that use a sequence to open a screen position should give it here. (If your terminal has both, insert mode is usually preferable to .Sy \&ic . Do not give both unless the terminal actually requires both to be used in combination.) If post-insert padding is needed, give this as a number of milliseconds in .Sy \&ip (a string option). Any other sequence that may need to be sent after insertion of a single character can also be given in .Sy \&ip . If your terminal needs to be placed into an `insert mode' and needs a special code preceding each inserted character, then both .Sy \&im Ns / Sy \&ei and .Sy \&ic can be given, and both will be used. The .Sy \&IC capability, with one parameter .Em n , will repeat the effects of .Sy \&ic .Em n times. .Pp It is occasionally necessary to move around while in insert mode to delete characters on the same line .Pf ( Em 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 .Sy \&mi to speed up inserting in this case. Omitting .Sy \&mi will affect only speed. Some terminals (notably Datamedia's) must not have .Sy \&mi because of the way their insert mode works. .Pp Finally, you can specify .Sy \&dc to delete a single character, .Sy \&DC with one parameter .Em n to delete .Em n characters, and delete mode by giving .Sy \&dm and .Sy \&ed to enter and exit delete mode (which is any mode the terminal needs to be placed in for .Sy \&dc to work). .Ss Highlighting, Underlining, and Visible Bells If your terminal has one or more kinds of display attributes, these can be represented in a number of different ways. You should choose one display form as .Em standout 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 .Sy \&so and .Sy \&se , respectively. If the code to change into or out of standout mode leaves one or even two blank spaces or garbage characters on the screen, as the .Tn TVI 912 and Teleray 1061 do, then .Sy \&sg should be given to tell how many characters are left. .Pp Codes to begin underlining and end underlining can be given as .Sy \&us and .Sy \&ue , respectively. Underline mode change garbage is specified by .Sy \&ug , similar to .Sy \&sg . If the terminal has a code to underline the current character and move the cursor one position to the right, such as the Microterm Mime, this can be given as .Sy \&uc . .Pp Other capabilities to enter various highlighting modes include .Sy \&mb (blinking), .Sy \&md (bold or extra bright), .Sy \&mh (dim or half-bright), .Sy \&mk (blanking or invisible text), .Sy \&mp (protected), .Sy \&mr (reverse video), .Sy \&me (turn off .Em all attribute modes), .Sy \&as (enter alternate character set mode), and .Sy \&ae (exit alternate character set mode). Turning on any of these modes singly may or may not turn off other modes. .Pp If there is a sequence to set arbitrary combinations of mode, this should be given as .Sy \&sa (set attributes), taking 9 parameters. Each parameter is either 0 or 1, as the corresponding attributes is on or off. The 9 parameters are, in order: standout, underline, reverse, blink, dim, bold, blank, protect, and alternate character set. Not all modes need be supported by .Sy \&sa , only those for which corresponding attribute commands exist. (It is unlikely that a .Nm Ns \-using program will support this capability, which is defined for compatibility with .Xr terminfo 5 . ) .Pp Terminals with the .Dq magic cookie glitches .Pf ( Sy \&sg and .Sy \&ug ) , rather than maintaining extra attribute bits for each character cell, instead deposit special .Dq cookies , or .Dq garbage characters , when they receive mode-setting sequences, which affect the display algorithm. .Pp Some terminals, such as the Hewlett-Packard 2621, automatically leave standout mode when they move to a new line or when the cursor is addressed. Programs using standout mode should exit standout mode on such terminals before moving the cursor or sending a newline. On terminals where this is not a problem, the .Sy \&ms capability should be present to say that this overhead is unnecessary. .Pp If the terminal has a way of flashing the screen to indicate an error quietly (a bell replacement), this can be given as .Sy \&vb ; it must not move the cursor. .Pp If the cursor needs to be made more visible than normal when it is not on the bottom line (to change, for example, a non-blinking underline into an easier-to-find block or blinking underline), give this sequence as .Sy \&vs . If there is a way to make the cursor completely invisible, give that as .Sy \&vi . The capability .Sy \&ve , which undoes the effects of both of these modes, should also be given. .Pp If your terminal correctly displays underlined characters (with no special codes needed) even though it does not overstrike, then you should give the capability .Sy \&ul . If overstrikes are erasable with a blank, this should be indicated by giving .Sy \&eo . .Ss Keypad 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 keypad only works in local mode (this applies, for example, to the unshifted Hewlett-Packard 2621 keys). If the keypad can be set to transmit or not transmit, give these codes as .Sy \&ks and .Sy \&ke . 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 .Sy \&kl , .Sy \&kr , .Sy \&ku , .Sy \&kd , and .Sy \&kh , respectively. If there are function keys such as f0, f1, ..., f9, the codes they send can be given as .Sy \&k0 , .Sy \&k1 , \&..., .Sy \&k9 . If these keys have labels other than the default f0 through f9, the labels can be given as .Sy \&l0 , .Sy \&l1 , \&..., .Sy \&l9 . The codes transmitted by certain other special keys can be given: .Sy \&kH (home down), .Sy \&kb (backspace), .Sy \&ka (clear all tabs), .Sy \&kt (clear the tab stop in this column), .Sy \&kC (clear screen or erase), .Sy \&kD (delete character), .Sy \&kL (delete line), .Sy \&kM (exit insert mode), .Sy \&kE (clear to end of line), .Sy \&kS (clear to end of screen), .Sy \&kI (insert character or enter insert mode), .Sy \&kA (insert line), .Sy \&kN (next page), .Sy \&kP (previous page), .Sy \&kF (scroll forward/down), .Sy \&kR (scroll backward/up), and .Sy \&kT (set a tab stop in this column). In addition, if the keypad has a 3 by 3 array of keys including the four arrow keys, then the other five keys can be given as .Sy \&K1 , .Sy \&K2 , .Sy \&K3 , .Sy \&K4 , and .Sy \&K5 . These keys are useful when the effects of a 3 by 3 directional pad are needed. The obsolete .Sy \&ko capability formerly used to describe .Dq other function keys has been completely supplanted by the above capabilities. .Pp The .Sy \&ma entry is also used to indicate arrow keys on terminals that have single-character arrow keys. It is obsolete but still in use in version 2 of .Sy \&vi which must be run on some minicomputers due to memory limitations. This field is redundant with .Sy \&kl , .Sy \&kr , .Sy \&ku , .Sy \&kd , and .Sy \&kh . It consists of groups of two characters. In each group, the first character is what an arrow key sends, and the second character is the corresponding .Sy \&vi command. These commands are .Ar h for .Sy \&kl , .Ar j for .Sy \&kd , .Ar k for .Sy \&ku , .Ar l for .Sy \&kr , and .Ar H for .Sy \&kh . For example, the Mime would have .Dq Li ma=^Hh^Kj^Zk^Xl indicating arrow keys left (^H), down (^K), up (^Z), and right (^X). (There is no home key on the Mime.) .Ss Tabs and Initialization 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 .Sy \&ti and .Sy \&te . 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 screen-sized window must be fixed into the display for cursor addressing to work properly. This is also used for the Tektronix 4025, where .Sy \&ti sets the command character to be the one used by .Nm . .Pp Other capabilities include .Sy \&is , an initialization string for the terminal, and .Sy \&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 .Nm description. They are normally sent to the terminal by the .Xr tset 1 program each time the user logs in. They will be printed in the following order: .Sy \&is ; setting tabs using .Sy \&ct and .Sy \&st ; and finally .Sy \&if . .Pf ( Xr Terminfo uses .Sy \&i\&1-i2 instead of .Sy \&is and runs the program .Sy \&iP and prints .Sy "\&i\&3" after the other initializations.) A pair of sequences that does a harder reset from a totally unknown state can be analogously given as .Sy \&rs and .Sy \&if . These strings are output by the .Xr reset 1 program, which is used when the terminal gets into a wedged state. .Pf ( Xr Terminfo uses .Sy "\&r1-r3" instead of .Sy \&rs . ) Commands are normally placed in .Sy \&rs and .Sy \&rf only if they produce annoying effects on the screen and are not necessary when logging in. For example, the command to set the VT100 into 80-column mode would normally be part of .Sy \&is , but it causes an annoying glitch of the screen and is not normally needed since the terminal is usually already in 80-column mode. .Pp If the terminal has hardware tabs, the command to advance to the next tab stop can be given as .Sy \&ta (usually .Sy \&^I ) . A .Dq backtab command which moves leftward to the previous tab stop can be given as .Sy \&bt . By convention, if the terminal driver modes indicate that tab stops are being expanded by the computer rather than being sent to the terminal, programs should not use .Sy \&ta or .Sy \&bt even if they are present, since the user may not have the tab stops properly set. If the terminal has hardware tabs that are initially set every .Ar n positions when the terminal is powered up, then the numeric parameter .Sy \&it is given, showing the number of positions between tab stops. This is normally used by the .Xr tset 1 command to determine whether to set the driver mode for hardware tab expansion, and whether to set the tab stops. If the terminal has tab stops that can be saved in nonvolatile memory, the .Nm description can assume that they are properly set. .Pp If there are commands to set and clear tab stops, they can be given as .Sy \&ct (clear all tab stops) and .Sy \&st (set a tab stop in the current column of every row). If a more complex sequence is needed to set the tabs than can be described by this, the sequence can be placed in .Sy \&is or .Sy \&if . .Ss Delays Certain capabilities control padding in the terminal driver. These are primarily needed by hardcopy terminals and are used by the .Xr tset 1 program to set terminal driver modes appropriately. Delays embedded in the capabilities .Sy \&cr , .Sy \&sf , .Sy \&le , .Sy \&ff , and .Sy \&ta will cause the appropriate delay bits to be set in the terminal driver. If .Sy \&pb (padding baud rate) is given, these values can be ignored at baud rates below the value of .Sy \&pb . For .Bx 4.2 .Xr tset 1 , the delays are given as numeric capabilities .Sy \&dC , .Sy \&dN , .Sy \&dB , .Sy \&dF , and .Sy \&dT instead. .Ss Miscellaneous If the terminal requires other than a .Dv NUL (zero) character as a pad, this can be given as .Sy \&pc . Only the first character of the .Sy \&pc string is used. .Pp If the terminal has commands to save and restore the position of the cursor, give them as .Sy \&sc and .Sy \&rc . .Pp If the terminal has an extra .Dq status line that is not normally used by software, this fact can be indicated. If the status line is viewed as an extra line below the bottom line, then the capability .Sy \&hs should be given. Special strings to go to a position in the status line and to return from the status line can be given as .Sy \&ts and .Sy \&fs . .Pf ( Xr \&fs must leave the cursor position in the same place that it was before .Sy \&ts . If necessary, the .Sy \&sc and .Sy \&rc strings can be included in .Sy \&ts and .Sy \&fs to get this effect.) The capability .Sy \&ts takes one parameter, which is the column number of the status line to which the cursor is to be moved. If escape sequences and other special commands such as tab work while in the status line, the flag .Sy \&es can be given. A string that turns off the status line (or otherwise erases its contents) should be given as .Sy \&ds . The status line is normally assumed to be the same width as the rest of the screen, .Em i.e . , .Sy \&co . If the status line is a different width (possibly because the terminal does not allow an entire line to be loaded), then its width in columns can be indicated with the numeric parameter .Sy \&ws . .Pp If the terminal can move up or down half a line, this can be indicated with .Sy \&hu (half-line up) and .Sy \&hd (half-line down). This is primarily useful for superscripts and subscripts on hardcopy terminals. If a hardcopy terminal can eject to the next page (form feed), give this as .Sy \&ff (usually .Sy \&^L ) . .Pp 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 .Sy \&rp . The first parameter is the character to be repeated and the second is the number of times to repeat it. (This is a .Xr terminfo 5 feature that is unlikely to be supported by a program that uses .Nm . ) .Pp If the terminal has a settable command character, such as the Tektronix 4025, this can be indicated with .Sy \&CC . A prototype command character is chosen which is used in all capabilities. This character is given in the .Sy \&CC capability to identify it. The following convention is supported on some .Ux systems: The environment is to be searched for a .Ev \&CC variable, and if found, all occurrences of the prototype character are replaced by the character in the environment variable. This use of the .Ev \&CC environment variable is a very bad idea, as it conflicts with .Xr make 1 . .Pp Terminal descriptions that do not represent a specific kind of known terminal, such as .Em switch , .Em dialup , .Em patch , and .Em network , should include the .Sy \&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 .Em virtual terminal descriptions for which the escape sequences are known.) .Pp If the terminal uses xoff/xon .Pq Tn DC3 Ns / Ns Tn DC1 handshaking for flow control, give .Sy \&xo . Padding information should still be included so that routines can make better decisions about costs, but actual pad characters will not be transmitted. .Pp If the terminal has a .Dq meta key which acts as a shift key, setting the 8th bit of any character transmitted, then this fact can be indicated with .Sy \&km . Otherwise, software will assume that the 8th bit is parity and it will usually be cleared. If strings exist to turn this .Dq meta mode on and off, they can be given as .Sy \&mm and .Sy \&mo . .Pp 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 .Sy \&lm . An explicit value of 0 indicates that the number of lines is not fixed, but that there is still more memory than fits on the screen. .Pp If the terminal is one of those supported by the .Ux system virtual terminal protocol, the terminal number can be given as .Sy \&vt . .Pp Media copy strings which control an auxiliary printer connected to the terminal can be given as .Sy \&ps : print the contents of the screen; .Sy \&pf : turn off the printer; and .Sy \&po : 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 terminal screen when the printer is on. A variation .Sy \&pO takes one parameter and leaves the printer on for as many characters as the value of the parameter, then turns the printer off. The parameter should not exceed 255. All text, including .Sy \&pf , is transparently passed to the printer while .Sy \&pO is in effect. .Pp Strings to program function keys can be given as .Sy \&pk , .Sy \&pl , and .Sy \&px . Each of these strings takes two parameters: the function key number to program (from 0 to 9) and the string to program it with. Function key numbers out of this range may program undefined keys in a terminal-dependent manner. The differences among the capabilities are that .Sy \&pk causes pressing the given key to be the same as the user typing the given string; .Sy \&pl causes the string to be executed by the terminal in local mode; and .Sy \&px causes the string to be transmitted to the computer. Unfortunately, due to lack of a definition for string parameters in .Nm , only .Xr terminfo 5 supports these capabilities. .Ss Glitches and Braindamage Hazeltine terminals, which do not allow `~' characters to be displayed, should indicate .Sy \&hz . .Pp The .Sy \&nc capability, now obsolete, formerly indicated Datamedia terminals, which echo .Sy \&\er \en for carriage return then ignore a following linefeed. .Pp Terminals that ignore a linefeed immediately after an .Sy \&am wrap, such as the Concept, should indicate .Sy \&xn . .Pp If .Sy \&ce is required to get rid of standout (instead of merely writing normal text on top of it), .Sy \&xs should be given. .Pp Teleray terminals, where tabs turn all characters moved over to blanks, should indicate .Sy \&xt (destructive tabs). This glitch is also taken to mean that it is not possible to position the cursor on top of a .Dq magic cookie , and that to erase standout mode it is necessary to use delete and insert line. .Pp The Beehive Superbee, which is unable to correctly transmit the .Dv ESC or .Sy \&^C characters, has .Sy \&xb , indicating that the .Dq \&f\&1 key is used for .Dv ESC and .Dq \&f\&2 for ^C. (Only certain Superbees have this problem, depending on the .Tn ROM . ) .Pp Other specific terminal problems may be corrected by adding more capabilities of the form .Sy x Em x . .Ss Similar Terminals If there are two very similar terminals, one can be defined as being just like the other with certain exceptions. The string capability .Sy \&tc can be given with the name of the similar terminal. This capability must be .Em last , and the combined length of the entries must not exceed 1024. The capabilities given before .Sy \&tc override those in the terminal type invoked by .Sy \&tc . A capability can be canceled by placing .Sy \&xx@ to the left of the .Sy \&tc invocation, where .Sy \&xx is the capability. For example, the entry .Bd -literal -offset indent hn\||\|2621\-nl:ks@:ke@:tc=2621: .Ed .Pp defines a .Dq 2621\-nl that does not have the .Sy \&ks or .Sy \&ke capabilities, 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. .Sh FILES .Bl -tag -width /usr/share/misc/termcap.db -compact .It Pa /usr/share/misc/termcap File containing terminal descriptions. .It Pa /usr/share/misc/termcap.db Hash database file containing terminal descriptions (see .Xr cap_mkdb 1 ) . .El .Sh SEE ALSO .Xr cap_mkdb 1 , .Xr ex 1 , .Xr more 1 , .Xr tset 1 , .Xr ul 1 , .Xr vi 1 , .Xr ncurses 3 , .Xr printf 3 , .Xr termcap 3 , .Xr term 5 .Sh CAVEATS AND BUGS The .Em Note : .Nm functions were replaced by .Xr terminfo 5 in .At V Release 2.0. The transition will be relatively painless if capabilities flagged as .Dq obsolete are avoided. .Pp Lines and columns are now stored by the kernel as well as in the termcap entry. Most programs now use the kernel information primarily; the information in this file is used only if the kernel does not have any information. .Pp The .Xr \&vi 1 program allows only 256 characters for string capabilities, and the routines in .Xr termlib 3 do not check for overflow of this buffer. The total length of a single entry (excluding only escaped newlines) may not exceed 1024. .Pp Not all programs support all entries. .Sh HISTORY The .Nm file format appeared in .Bx 3 .