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diff --git a/doc/html/man/tset.1.html b/doc/html/man/tset.1.html index 471e05307aaf..a5669568fb27 100644 --- a/doc/html/man/tset.1.html +++ b/doc/html/man/tset.1.html @@ -1,6 +1,6 @@ -<!-- +<!-- **************************************************************************** - * Copyright 2018,2020 Thomas E. Dickey * + * Copyright 2018-2023,2024 Thomas E. Dickey * * Copyright 1998-2016,2017 Free Software Foundation, Inc. * * * * Permission is hereby granted, free of charge, to any person obtaining a * @@ -27,37 +27,39 @@ * sale, use or other dealings in this Software without prior written * * authorization. * **************************************************************************** - * @Id: tset.1,v 1.55 2020/02/02 23:34:34 tom Exp @ + * @Id: tset.1,v 1.85 2024/04/27 17:57:47 tom Exp @ --> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN"> <HTML> <HEAD> <meta http-equiv="Content-Type" content="text/html; charset=us-ascii"> <meta name="generator" content="Manpage converted by man2html - see https://invisible-island.net/scripts/readme.html#others_scripts"> -<TITLE>tset 1</TITLE> +<TITLE>tset 1 2024-04-27 ncurses 6.5 User commands</TITLE> <link rel="author" href="mailto:bug-ncurses@gnu.org"> -<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> + </HEAD> <BODY> -<H1 class="no-header">tset 1</H1> +<H1 class="no-header">tset 1 2024-04-27 ncurses 6.5 User commands</H1> <PRE> -<STRONG><A HREF="tset.1.html">tset(1)</A></STRONG> General Commands Manual <STRONG><A HREF="tset.1.html">tset(1)</A></STRONG> +<STRONG><A HREF="tset.1.html">tset(1)</A></STRONG> User commands <STRONG><A HREF="tset.1.html">tset(1)</A></STRONG> </PRE><H2><a name="h2-NAME">NAME</a></H2><PRE> - <STRONG>tset</STRONG>, <STRONG>reset</STRONG> - terminal initialization + <STRONG>tset</STRONG>, <STRONG>reset</STRONG> - initialize or reset terminal state </PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE> - <STRONG>tset</STRONG> [<STRONG>-IQVcqrsw</STRONG>] [<STRONG>-</STRONG>] [<STRONG>-e</STRONG> <EM>ch</EM>] [<STRONG>-i</STRONG> <EM>ch</EM>] [<STRONG>-k</STRONG> <EM>ch</EM>] [<STRONG>-m</STRONG> <EM>mapping</EM>] [<EM>terminal</EM>] - <STRONG>reset</STRONG> [<STRONG>-IQVcqrsw</STRONG>] [<STRONG>-</STRONG>] [<STRONG>-e</STRONG> <EM>ch</EM>] [<STRONG>-i</STRONG> <EM>ch</EM>] [<STRONG>-k</STRONG> <EM>ch</EM>] [<STRONG>-m</STRONG> <EM>mapping</EM>] [<EM>terminal</EM>] + <STRONG>tset</STRONG> [<STRONG>-IQVcqrsw</STRONG>] [<STRONG>-</STRONG>] [<STRONG>-e</STRONG> <EM>ch</EM>] [<STRONG>-i</STRONG> <EM>ch</EM>] [<STRONG>-k</STRONG> <EM>ch</EM>] [<STRONG>-m</STRONG> <EM>mapping</EM>] [<EM>terminal-</EM> + <EM>type</EM>] + <STRONG>reset</STRONG> [<STRONG>-IQVcqrsw</STRONG>] [<STRONG>-</STRONG>] [<STRONG>-e</STRONG> <EM>ch</EM>] [<STRONG>-i</STRONG> <EM>ch</EM>] [<STRONG>-k</STRONG> <EM>ch</EM>] [<STRONG>-m</STRONG> <EM>mapping</EM>] [<EM>terminal-</EM> + <EM>type</EM>] </PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE> -</PRE><H3><a name="h3-tset---initialization">tset - initialization</a></H3><PRE> +</PRE><H3><a name="h3-tset----initialization"><EM>tset</EM> -- initialization</a></H3><PRE> This program initializes terminals. First, <STRONG>tset</STRONG> retrieves the current terminal mode settings for your @@ -79,48 +81,49 @@ 1. The <STRONG>terminal</STRONG> argument specified on the command line. - 2. The value of the <STRONG>TERM</STRONG> environmental variable. + 2. The value of the <EM>TERM</EM> environment variable. 3. (BSD systems only.) The terminal type associated with the standard - error output device in the <EM>/etc/ttys</EM> file. (On System-V-like UNIXes - and systems using that convention, <EM>getty</EM> does this job by setting <STRONG>TERM</STRONG> + error output device in the <EM>/etc/ttys</EM> file. (On System V hosts and + systems using that convention, <STRONG>getty(8)</STRONG> does this job by setting <EM>TERM</EM> according to the type passed to it by <EM>/etc/inittab</EM>.) - 4. The default terminal type, "unknown". + 4. The default terminal type, "unknown", is not suitable for curses + applications. - If the terminal type was not specified on the command-line, the <STRONG>-m</STRONG> - option mappings are then applied (see the section <STRONG>TERMINAL</STRONG> <STRONG>TYPE</STRONG> <STRONG>MAPPING</STRONG> - for more information). Then, if the terminal type begins with a - question mark ("?"), the user is prompted for confirmation of the - terminal type. An empty response confirms the type, or, another type - can be entered to specify a new type. Once the terminal type has been - determined, the terminal description for the terminal is retrieved. If - no terminal description is found for the type, the user is prompted for - another terminal type. + If the terminal type was not specified on the command-line, the <STRONG>-m</STRONG> + option mappings are then applied; see subsection "Terminal Type + Mapping". Then, if the terminal type begins with a question mark + ("?"), the user is prompted for confirmation of the terminal type. An + empty response confirms the type, or, another type can be entered to + specify a new type. Once the terminal type has been determined, the + terminal description for the terminal is retrieved. If no terminal + description is found for the type, the user is prompted for another + terminal type. Once the terminal description is retrieved, - <STRONG>o</STRONG> if the "<STRONG>-w</STRONG>" option is enabled, <STRONG>tset</STRONG> may update the terminal's + <STRONG>o</STRONG> if the "<STRONG>-w</STRONG>" option is enabled, <STRONG>tset</STRONG> may update the terminal's window size. - If the window size cannot be obtained from the operating system, - but the terminal description (or environment, e.g., <STRONG>LINES</STRONG> and - <STRONG>COLUMNS</STRONG> variables specify this), use this to set the operating + If the window size cannot be obtained from the operating system, + but the terminal description (or environment, e.g., <EM>LINES</EM> and + <EM>COLUMNS</EM> variables specify this), use this to set the operating system's notion of the window size. - <STRONG>o</STRONG> if the "<STRONG>-c</STRONG>" option is enabled, the backspace, interrupt and line + <STRONG>o</STRONG> if the "<STRONG>-c</STRONG>" option is enabled, the backspace, interrupt and line kill characters (among many other things) are set - <STRONG>o</STRONG> unless the "<STRONG>-I</STRONG>" option is enabled, the terminal and tab - <EM>initialization</EM> strings are sent to the standard error output, and + <STRONG>o</STRONG> unless the "<STRONG>-I</STRONG>" option is enabled, the terminal and tab + <EM>initialization</EM> strings are sent to the standard error output, and <STRONG>tset</STRONG> waits one second (in case a hardware reset was issued). - <STRONG>o</STRONG> Finally, if the erase, interrupt and line kill characters have - changed, or are not set to their default values, their values are + <STRONG>o</STRONG> Finally, if the erase, interrupt and line kill characters have + changed, or are not set to their default values, their values are displayed to the standard error output. -</PRE><H3><a name="h3-reset---reinitialization">reset - reinitialization</a></H3><PRE> +</PRE><H3><a name="h3-reset----reinitialization"><EM>reset</EM> -- reinitialization</a></H3><PRE> When invoked as <STRONG>reset</STRONG>, <STRONG>tset</STRONG> sets the terminal modes to "sane" values: <STRONG>o</STRONG> sets cooked and echo modes, @@ -132,10 +135,10 @@ <STRONG>o</STRONG> resets any unset special characters to their default values before doing the terminal initialization described above. Also, rather - than using the terminal <EM>initialization</EM> strings, it uses the terminal + than using the terminal <EM>initialization</EM> strings, it uses the terminal <EM>reset</EM> strings. - The <STRONG>reset</STRONG> command is useful after a program dies leaving a terminal in + The <STRONG>reset</STRONG> command is useful after a program dies leaving a terminal in an abnormal state: <STRONG>o</STRONG> you may have to type @@ -143,76 +146,31 @@ <EM><LF></EM><STRONG>reset</STRONG><EM><LF></EM> (the line-feed character is normally control-J) to get the terminal - to work, as carriage-return may no longer work in the abnormal + to work, as carriage-return may no longer work in the abnormal state. <STRONG>o</STRONG> Also, the terminal will often not echo the command. -</PRE><H2><a name="h2-OPTIONS">OPTIONS</a></H2><PRE> - The options are as follows: - - <STRONG>-c</STRONG> Set control characters and modes. - - <STRONG>-e</STRONG> Set the erase character to <EM>ch</EM>. - - <STRONG>-I</STRONG> Do not send the terminal or tab initialization strings to the - terminal. - - <STRONG>-i</STRONG> Set the interrupt character to <EM>ch</EM>. - - <STRONG>-k</STRONG> Set the line kill character to <EM>ch</EM>. - - <STRONG>-m</STRONG> Specify a mapping from a port type to a terminal. See the section - <STRONG>TERMINAL</STRONG> <STRONG>TYPE</STRONG> <STRONG>MAPPING</STRONG> for more information. - - <STRONG>-Q</STRONG> Do not display any values for the erase, interrupt and line kill - characters. Normally <STRONG>tset</STRONG> displays the values for control - characters which differ from the system's default values. - - <STRONG>-q</STRONG> The terminal type is displayed to the standard output, and the - terminal is not initialized in any way. The option "-" by itself - is equivalent but archaic. - - <STRONG>-r</STRONG> Print the terminal type to the standard error output. - - <STRONG>-s</STRONG> Print the sequence of shell commands to initialize the environment - variable <STRONG>TERM</STRONG> to the standard output. See the section <STRONG>SETTING</STRONG> <STRONG>THE</STRONG> - <STRONG>ENVIRONMENT</STRONG> for details. - - <STRONG>-V</STRONG> reports the version of ncurses which was used in this program, and - exits. - - <STRONG>-w</STRONG> Resize the window to match the size deduced via <STRONG><A HREF="curs_terminfo.3x.html">setupterm(3x)</A></STRONG>. - Normally this has no effect, unless <STRONG>setupterm</STRONG> is not able to - detect the window size. - - The arguments for the <STRONG>-e</STRONG>, <STRONG>-i</STRONG>, and <STRONG>-k</STRONG> options may either be entered as - actual characters or by using the "hat" notation, i.e., control-h may - be specified as "^H" or "^h". - - If neither <STRONG>-c</STRONG> or <STRONG>-w</STRONG> is given, both options are assumed. - - -</PRE><H2><a name="h2-SETTING-THE-ENVIRONMENT">SETTING THE ENVIRONMENT</a></H2><PRE> +</PRE><H3><a name="h3-Setting-the-Environment">Setting the Environment</a></H3><PRE> It is often desirable to enter the terminal type and information about the terminal's capabilities into the shell's environment. This is done using the <STRONG>-s</STRONG> option. When the <STRONG>-s</STRONG> option is specified, the commands to enter the information into the shell's environment are written to the standard output. If - the <STRONG>SHELL</STRONG> environmental variable ends in "csh", the commands are for - <STRONG>csh</STRONG>, otherwise, they are for <STRONG>sh</STRONG>. Note, the <STRONG>csh</STRONG> commands set and unset + the <EM>SHELL</EM> environment variable ends in "csh", the commands are for + <STRONG>csh(1)</STRONG>, otherwise, they are for <STRONG>sh(1)</STRONG>. The <EM>csh</EM> commands set and unset the shell variable <STRONG>noglob</STRONG>, leaving it unset. The following line in the <STRONG>.login</STRONG> or <STRONG>.profile</STRONG> files will initialize the environment correctly: eval `tset -s options ... ` -</PRE><H2><a name="h2-TERMINAL-TYPE-MAPPING">TERMINAL TYPE MAPPING</a></H2><PRE> +</PRE><H3><a name="h3-Terminal-Type-Mapping">Terminal Type Mapping</a></H3><PRE> When the terminal is not hardwired into the system (or the current system information is incorrect) the terminal type derived from the - <EM>/etc/ttys</EM> file or the <STRONG>TERM</STRONG> environmental variable is often something + <EM>/etc/ttys</EM> file or the <EM>TERM</EM> environment variable is often something generic like <STRONG>network</STRONG>, <STRONG>dialup</STRONG>, or <STRONG>unknown</STRONG>. When <STRONG>tset</STRONG> is used in a startup script it is often desirable to provide information about the type of terminal used on such ports. @@ -254,148 +212,188 @@ No whitespace characters are permitted in the <STRONG>-m</STRONG> option argument. Also, to avoid problems with meta-characters, it is suggested that the entire <STRONG>-m</STRONG> option argument be placed within single quote characters, and - that <STRONG>csh</STRONG> users insert a backslash character ("\") before any + that <EM>csh</EM> users insert a backslash character ("\") before any exclamation marks ("!"). -</PRE><H2><a name="h2-HISTORY">HISTORY</a></H2><PRE> - A <STRONG>reset</STRONG> command appeared in 2BSD (April 1979), written by Kurt Shoens. - This program set the <EM>erase</EM> and <EM>kill</EM> characters to <STRONG>^H</STRONG> (backspace) and <STRONG>@</STRONG> - respectively. Mark Horton improved that in 3BSD (October 1979), adding - <EM>intr</EM>, <EM>quit</EM>, <EM>start</EM>/<EM>stop</EM> and <EM>eof</EM> characters as well as changing the - program to avoid modifying any user settings. +</PRE><H2><a name="h2-OPTIONS">OPTIONS</a></H2><PRE> + The options are as follows: - Later in 4.1BSD (December 1980), Mark Horton added a call to the <STRONG>tset</STRONG> - program using the <STRONG>-I</STRONG> and <STRONG>-Q</STRONG> options, i.e., using that to improve the - terminal modes. With those options, that version of <STRONG>reset</STRONG> did not use - the termcap database. + <STRONG>-c</STRONG> Set control characters and modes. - A separate <STRONG>tset</STRONG> command was provided in 2BSD by Eric Allman. While the - oldest published source (from 1979) provides both <STRONG>tset</STRONG> and <STRONG>reset</STRONG>, - Allman's comments in the 2BSD source code indicate that he began work - in October 1977, continuing development over the next few years. + <STRONG>-e</STRONG> <EM>ch</EM> + Set the erase character to <EM>ch</EM>. - In September 1980, Eric Allman modified <STRONG>tset</STRONG>, adding the code from the - existing "reset" feature when <STRONG>tset</STRONG> was invoked as <STRONG>reset</STRONG>. Rather than - simply copying the existing program, in this merged version, <STRONG>tset</STRONG> used - the termcap database to do additional (re)initialization of the - terminal. This version appeared in 4.1cBSD, late in 1982. + <STRONG>-I</STRONG> Do not send the terminal or tab initialization strings to the + terminal. + + <STRONG>-i</STRONG> <EM>ch</EM> + Set the interrupt character to <EM>ch</EM>. + + <STRONG>-k</STRONG> <EM>ch</EM> + Set the line kill character to <EM>ch</EM>. + + <STRONG>-m</STRONG> <EM>mapping</EM> + Specify a mapping from a port type to a terminal; see subsection + "Terminal Type Mapping". + + <STRONG>-Q</STRONG> Do not display any values for the erase, interrupt and line kill + characters. Normally <STRONG>tset</STRONG> displays the values for control + characters which differ from the system's default values. - Other developers (e.g., Keith Bostic and Jim Bloom) continued to modify - <STRONG>tset</STRONG> until 4.4BSD was released in 1993. + <STRONG>-q</STRONG> The terminal type is displayed to the standard output, and the + terminal is not initialized in any way. The option "-" by itself + is equivalent but archaic. - The <STRONG>ncurses</STRONG> implementation was lightly adapted from the 4.4BSD sources - for a terminfo environment by Eric S. Raymond <esr@snark.thyrsus.com>. + <STRONG>-r</STRONG> Print the terminal type to the standard error output. + <STRONG>-s</STRONG> Print the sequence of shell commands to initialize the environment + variable <EM>TERM</EM> to the standard output; see subsection "Setting the + Environment". -</PRE><H2><a name="h2-COMPATIBILITY">COMPATIBILITY</a></H2><PRE> - Neither IEEE Std 1003.1/The Open Group Base Specifications Issue 7 + <STRONG>-V</STRONG> reports the version of <EM>ncurses</EM> which was used in this program, and + exits. + + <STRONG>-w</STRONG> Resize the window to match the size deduced via <STRONG><A HREF="curs_terminfo.3x.html">setupterm(3x)</A></STRONG>. + Normally this has no effect, unless <STRONG>setupterm</STRONG> is not able to + detect the window size. + + The arguments for the <STRONG>-e</STRONG>, <STRONG>-i</STRONG>, and <STRONG>-k</STRONG> options may either be entered as + actual characters or by using the "hat" notation, i.e., control-h may + be specified as "^H" or "^h". + + If neither <STRONG>-c</STRONG> or <STRONG>-w</STRONG> is given, both options are assumed. + + +</PRE><H2><a name="h2-ENVIRONMENT">ENVIRONMENT</a></H2><PRE> + The <STRONG>tset</STRONG> command uses these environment variables: + + <EM>SHELL</EM> + tells <STRONG>tset</STRONG> whether to initialize <EM>TERM</EM> using <STRONG>sh(1)</STRONG> or <STRONG>csh(1)</STRONG> + syntax. + + <EM>TERM</EM> Denotes your terminal type. Each terminal type is distinct, + though many are similar. + + <EM>TERMCAP</EM> + may denote the location of a termcap database. If it is not an + absolute pathname, e.g., begins with a "/", <STRONG>tset</STRONG> removes the + variable from the environment before looking for the terminal + description. + + +</PRE><H2><a name="h2-FILES">FILES</a></H2><PRE> + <EM>/etc/ttys</EM> + system port name to terminal type mapping database (BSD versions + only). + + <EM>/usr/share/terminfo</EM> + compiled terminal description database directory + + +</PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE> + Neither IEEE Std 1003.1/The Open Group Base Specifications Issue 7 (POSIX.1-2008) nor X/Open Curses Issue 7 documents <STRONG>tset</STRONG> or <STRONG>reset</STRONG>. - The AT&T <STRONG>tput</STRONG> utility (AIX, HPUX, Solaris) incorporated the terminal- - mode manipulation as well as termcap-based features such as resetting - tabstops from <STRONG>tset</STRONG> in BSD (4.1c), presumably with the intention of - making <STRONG>tset</STRONG> obsolete. However, each of those systems still provides - <STRONG>tset</STRONG>. In fact, the commonly-used <STRONG>reset</STRONG> utility is always an alias for + The AT&T <STRONG>tput</STRONG> utility (AIX, HP-UX, Solaris) incorporated the terminal- + mode manipulation as well as termcap-based features such as resetting + tabstops from <STRONG>tset</STRONG> in BSD (4.1c), presumably with the intention of + making <STRONG>tset</STRONG> obsolete. However, each of those systems still provides + <STRONG>tset</STRONG>. In fact, the commonly-used <STRONG>reset</STRONG> utility is always an alias for <STRONG>tset</STRONG>. - The <STRONG>tset</STRONG> utility provides for backward-compatibility with BSD - environments (under most modern UNIXes, <STRONG>/etc/inittab</STRONG> and <STRONG>getty(1)</STRONG> can - set <STRONG>TERM</STRONG> appropriately for each dial-up line; this obviates what was - <STRONG>tset</STRONG>'s most important use). This implementation behaves like 4.4BSD - <STRONG>tset</STRONG>, with a few exceptions specified here. + The <STRONG>tset</STRONG> utility provides backward compatibility with BSD environments; + under most modern Unices, <EM>/etc/inittab</EM> and <STRONG>getty(8)</STRONG> can set <EM>TERM</EM> + appropriately for each dial-up line, obviating what was <STRONG>tset</STRONG>'s most + important use. This implementation behaves like 4.4BSD <STRONG>tset</STRONG>, with a + few exceptions we shall consider now. - A few options are different because the <STRONG>TERMCAP</STRONG> variable is no longer - supported under terminfo-based <STRONG>ncurses</STRONG>: + A few options are different because the <EM>TERMCAP</EM> variable is no longer + supported under terminfo-based <EM>ncurses</EM>: - <STRONG>o</STRONG> The <STRONG>-S</STRONG> option of BSD <STRONG>tset</STRONG> no longer works; it prints an error + <STRONG>o</STRONG> The <STRONG>-S</STRONG> option of BSD <STRONG>tset</STRONG> no longer works; it prints an error message to the standard error and dies. - <STRONG>o</STRONG> The <STRONG>-s</STRONG> option only sets <STRONG>TERM</STRONG>, not <STRONG>TERMCAP</STRONG>. + <STRONG>o</STRONG> The <STRONG>-s</STRONG> option only sets <EM>TERM</EM>, not <EM>TERMCAP</EM>. - There was an undocumented 4.4BSD feature that invoking <STRONG>tset</STRONG> via a link - named "TSET" (or via any other name beginning with an upper-case + There was an undocumented 4.4BSD feature that invoking <STRONG>tset</STRONG> via a link + named "TSET" (or via any other name beginning with an upper-case letter) set the terminal to use upper-case only. This feature has been omitted. The <STRONG>-A</STRONG>, <STRONG>-E</STRONG>, <STRONG>-h</STRONG>, <STRONG>-u</STRONG> and <STRONG>-v</STRONG> options were deleted from the <STRONG>tset</STRONG> utility in - 4.4BSD. None of them were documented in 4.3BSD and all are of limited - utility at best. The <STRONG>-a</STRONG>, <STRONG>-d</STRONG>, and <STRONG>-p</STRONG> options are similarly not - documented or useful, but were retained as they appear to be in - widespread use. It is strongly recommended that any usage of these + 4.4BSD. None of them were documented in 4.3BSD and all are of limited + utility at best. The <STRONG>-a</STRONG>, <STRONG>-d</STRONG>, and <STRONG>-p</STRONG> options are similarly not + documented or useful, but were retained as they appear to be in + widespread use. It is strongly recommended that any usage of these three options be changed to use the <STRONG>-m</STRONG> option instead. The <STRONG>-a</STRONG>, <STRONG>-d</STRONG>, and <STRONG>-p</STRONG> options are therefore omitted from the usage summary above. - Very old systems, e.g., 3BSD, used a different terminal driver which - was replaced in 4BSD in the early 1980s. To accommodate these older - systems, the 4BSD <STRONG>tset</STRONG> provided a <STRONG>-n</STRONG> option to specify that the new - terminal driver should be used. This implementation does not provide + Very old systems, e.g., 3BSD, used a different terminal driver which + was replaced in 4BSD in the early 1980s. To accommodate these older + systems, the 4BSD <STRONG>tset</STRONG> provided a <STRONG>-n</STRONG> option to specify that the new + terminal driver should be used. This implementation does not provide that choice. - It is still permissible to specify the <STRONG>-e</STRONG>, <STRONG>-i</STRONG>, and <STRONG>-k</STRONG> options without + It is still permissible to specify the <STRONG>-e</STRONG>, <STRONG>-i</STRONG>, and <STRONG>-k</STRONG> options without arguments, although it is strongly recommended that such usage be fixed to explicitly specify the character. - As of 4.4BSD, executing <STRONG>tset</STRONG> as <STRONG>reset</STRONG> no longer implies the <STRONG>-Q</STRONG> option. + As of 4.4BSD, executing <STRONG>tset</STRONG> as <STRONG>reset</STRONG> no longer implies the <STRONG>-Q</STRONG> option. Also, the interaction between the - option and the <EM>terminal</EM> argument in some historic implementations of <STRONG>tset</STRONG> has been removed. - The <STRONG>-c</STRONG> and <STRONG>-w</STRONG> options are not found in earlier implementations. + The <STRONG>-c</STRONG> and <STRONG>-w</STRONG> options are not found in earlier implementations. However, a different window size-change feature was provided in 4.4BSD. - <STRONG>o</STRONG> In 4.4BSD, <STRONG>tset</STRONG> uses the window size from the termcap description - to set the window size if <STRONG>tset</STRONG> is not able to obtain the window + <STRONG>o</STRONG> In 4.4BSD, <STRONG>tset</STRONG> uses the window size from the termcap description + to set the window size if <STRONG>tset</STRONG> is not able to obtain the window size from the operating system. - <STRONG>o</STRONG> In ncurses, <STRONG>tset</STRONG> obtains the window size using <STRONG>setupterm</STRONG>, which may - be from the operating system, the <STRONG>LINES</STRONG> and <STRONG>COLUMNS</STRONG> environment + <STRONG>o</STRONG> In <EM>ncurses</EM>, <STRONG>tset</STRONG> obtains the window size using <STRONG><A HREF="curs_terminfo.3x.html">setupterm(3x)</A></STRONG>, which + may be from the operating system, the <EM>LINES</EM> and <EM>COLUMNS</EM> environment variables or the terminal description. - Obtaining the window size from the terminal description is common to - both implementations, but considered obsolescent. Its only practical - use is for hardware terminals. Generally speaking, a window size would - be unset only if there were some problem obtaining the value from the - operating system (and <STRONG>setupterm</STRONG> would still fail). For that reason, - the <STRONG>LINES</STRONG> and <STRONG>COLUMNS</STRONG> environment variables may be useful for working - around window-size problems. Those have the drawback that if the - window is resized, those variables must be recomputed and reassigned. - To do this more easily, use the <STRONG><A HREF="resize.1.html">resize(1)</A></STRONG> program. + Obtaining the window size from a terminal's type description is common + to both implementations, but considered obsolescent. Its only + practical use is for hardware terminals. Generally, the window size + will remain uninitialized only if there were a problem obtaining the + value from the operating system (and <STRONG>setupterm</STRONG> would still fail). The + <EM>LINES</EM> and <EM>COLUMNS</EM> environment variables may thus be useful for working + around window-size problems, but have the drawback that if the window + is resized, their values must be recomputed and reassigned. The + <STRONG>resize(1)</STRONG> program distributed with <STRONG>xterm(1)</STRONG> assists this activity. -</PRE><H2><a name="h2-ENVIRONMENT">ENVIRONMENT</a></H2><PRE> - The <STRONG>tset</STRONG> command uses these environment variables: - - SHELL - tells <STRONG>tset</STRONG> whether to initialize <STRONG>TERM</STRONG> using <STRONG>sh</STRONG> or <STRONG>csh</STRONG> syntax. - - TERM Denotes your terminal type. Each terminal type is distinct, - though many are similar. - - TERMCAP - may denote the location of a termcap database. If it is not an - absolute pathname, e.g., begins with a "/", <STRONG>tset</STRONG> removes the - variable from the environment before looking for the terminal - description. - - -</PRE><H2><a name="h2-FILES">FILES</a></H2><PRE> - /etc/ttys - system port name to terminal type mapping database (BSD versions - only). - - /usr/share/terminfo - terminal capability database +</PRE><H2><a name="h2-HISTORY">HISTORY</a></H2><PRE> + A <STRONG>reset</STRONG> command written by Kurt Shoens appeared in 1BSD (March 1978). + It set the <EM>erase</EM> and <EM>kill</EM> characters to <STRONG>^H</STRONG> (backspace) and <STRONG>@</STRONG> + respectively. Mark Horton improved this <STRONG>reset</STRONG> in 3BSD (October 1979), + adding <EM>intr</EM>, <EM>quit</EM>, <EM>start</EM>/<EM>stop</EM>, and <EM>eof</EM> characters as well as changing + the program to avoid modifying any user settings. That version of + <STRONG>reset</STRONG> did not use <EM>termcap</EM>. + + Eric Allman wrote a distinct <STRONG>tset</STRONG> command for 1BSD, using a forerunner + of <EM>termcap</EM> called <EM>ttycap</EM>. Allman's comments in the source code + indicate that he began work in October 1977, continuing development + over the next few years. By late 1979, it had migrated to <EM>termcap</EM> and + handled the <EM>TERMCAP</EM> variable. Later comments indicate that <STRONG>tset</STRONG> was + modified in September 1980 to use logic copied from the 3BSD "reset" + program when it was invoked as <STRONG>reset</STRONG>. This version appeared in + 4.1cBSD, late in 1982. Other developers such as Keith Bostic and Jim + Bloom continued to modify <STRONG>tset</STRONG> until 4.4BSD was released in 1993. + + The <EM>ncurses</EM> implementation was lightly adapted from the 4.4BSD sources + to use the <EM>terminfo</EM> API by Eric S. Raymond <esr@snark.thyrsus.com>. </PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE> <STRONG>csh(1)</STRONG>, <STRONG>sh(1)</STRONG>, <STRONG>stty(1)</STRONG>, <STRONG><A HREF="curs_terminfo.3x.html">curs_terminfo(3x)</A></STRONG>, <STRONG>tty(4)</STRONG>, <STRONG><A HREF="terminfo.5.html">terminfo(5)</A></STRONG>, <STRONG>ttys(5)</STRONG>, <STRONG>environ(7)</STRONG> - This describes <STRONG>ncurses</STRONG> version 6.2 (patch 20210109). - - <STRONG><A HREF="tset.1.html">tset(1)</A></STRONG> +ncurses 6.5 2024-04-27 <STRONG><A HREF="tset.1.html">tset(1)</A></STRONG> </PRE> <div class="nav"> <ul> @@ -403,17 +401,17 @@ <li><a href="#h2-SYNOPSIS">SYNOPSIS</a></li> <li><a href="#h2-DESCRIPTION">DESCRIPTION</a> <ul> -<li><a href="#h3-tset---initialization">tset - initialization</a></li> -<li><a href="#h3-reset---reinitialization">reset - reinitialization</a></li> +<li><a href="#h3-tset----initialization">tset -- initialization</a></li> +<li><a href="#h3-reset----reinitialization">reset -- reinitialization</a></li> +<li><a href="#h3-Setting-the-Environment">Setting the Environment</a></li> +<li><a href="#h3-Terminal-Type-Mapping">Terminal Type Mapping</a></li> </ul> </li> <li><a href="#h2-OPTIONS">OPTIONS</a></li> -<li><a href="#h2-SETTING-THE-ENVIRONMENT">SETTING THE ENVIRONMENT</a></li> -<li><a href="#h2-TERMINAL-TYPE-MAPPING">TERMINAL TYPE MAPPING</a></li> -<li><a href="#h2-HISTORY">HISTORY</a></li> -<li><a href="#h2-COMPATIBILITY">COMPATIBILITY</a></li> <li><a href="#h2-ENVIRONMENT">ENVIRONMENT</a></li> <li><a href="#h2-FILES">FILES</a></li> +<li><a href="#h2-PORTABILITY">PORTABILITY</a></li> +<li><a href="#h2-HISTORY">HISTORY</a></li> <li><a href="#h2-SEE-ALSO">SEE ALSO</a></li> </ul> </div> |