.\" authorization. *
.\"***************************************************************************
.\"
-.\" $Id: tset.1,v 1.73 2023/10/14 19:24:28 tom Exp $
-.TH @TSET@ 1 2023-10-14 "ncurses 6.4" "User commands"
+.\" $Id: tset.1,v 1.75 2023/11/25 14:32:36 tom Exp $
+.TH @TSET@ 1 2023-11-25 "ncurses 6.4" "User commands"
.ie \n(.g \{\
.ds `` \(lq
.ds '' \(rq
\fB\%@RESET@\fP \-
initialize or reset terminal state
.SH SYNOPSIS
-\fB@TSET@\fP [\fB\-IQVcqrsw\fP] [\fB\-\fP] [\fB\-e\fP \fIch\fP] [\fB\-i\fP \fIch\fP] [\fB\-k\fP \fIch\fP] [\fB\-m\fP \fImapping\fP] [\fIterminal\fP]
+\fB@TSET@\fP [\fB\-IQVcqrsw\fP] [\fB\-\fP] [\fB\-e\fP \fIch\fP] [\fB\-i\fP \fIch\fP] [\fB\-k\fP \fIch\fP] [\fB\-m\fP \fImapping\fP] [\fIterminal-type\fP]
.br
-\fB@RESET@\fP [\fB\-IQVcqrsw\fP] [\fB\-\fP] [\fB\-e\fP \fIch\fP] [\fB\-i\fP \fIch\fP] [\fB\-k\fP \fIch\fP] [\fB\-m\fP \fImapping\fP] [\fIterminal\fP]
+\fB@RESET@\fP [\fB\-IQVcqrsw\fP] [\fB\-\fP] [\fB\-e\fP \fIch\fP] [\fB\-i\fP \fIch\fP] [\fB\-k\fP \fIch\fP] [\fB\-m\fP \fImapping\fP] [\fIterminal-type\fP]
.SH DESCRIPTION
.SS tset - initialization
This program initializes terminals.
.PP
3. (BSD systems only.) The terminal type associated with the standard
error output device in the \fI/etc/ttys\fP file.
-(On System\-V-like UNIXes and systems using that convention,
+(On System\-V-like Unices and systems using that convention,
\fBgetty\fP(1) does this job by setting
\fBTERM\fP according to the type passed to it by \fI/etc/inittab\fP.)
.PP
is not suitable for curses applications.
.PP
If the terminal type was not specified on the command-line, the \fB\-m\fP
-option mappings are then applied (see the section
-.B TERMINAL TYPE MAPPING
-for more information).
+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
to work, as carriage-return may no longer work in the abnormal state.
.bP
Also, the terminal will often not echo the command.
-.SH OPTIONS
-The options are as follows:
-.TP 5
-.B \-c
-Set control characters and modes.
-.TP 5
-.BI \-e\ ch
-Set the erase character to \fIch\fP.
-.TP
-.B \-I
-Do not send the terminal or tab initialization strings to the terminal.
-.TP
-.BI \-i\ ch
-Set the interrupt character to \fIch\fP.
-.TP
-.BI \-k\ ch
-Set the line kill character to \fIch\fP.
-.TP
-.BI \-m\ mapping
-Specify a mapping from a port type to a terminal.
-See the section
-.B TERMINAL TYPE MAPPING
-for more information.
-.TP
-.B \-Q
-Do not display any values for the erase, interrupt and line kill characters.
-Normally \fB@TSET@\fP displays the values for control characters which
-differ from the system's default values.
-.TP
-.B \-q
-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.
-.TP
-.B \-r
-Print the terminal type to the standard error output.
-.TP
-.B \-s
-Print the sequence of shell commands to initialize the environment variable
-\fBTERM\fP to the standard output.
-See the section
-.B SETTING THE ENVIRONMENT
-for details.
-.TP
-.B \-V
-reports the version of ncurses which was used in this program, and exits.
-.TP
-.B \-w
-Resize the window to match the size deduced via \fBsetupterm\fP(3X).
-Normally this has no effect,
-unless \fBsetupterm\fP is not able to detect the window size.
-.PP
-The arguments for the \fB\-e\fP, \fB\-i\fP, and \fB\-k\fP
-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\*(''.
-.PP
-If neither \fB\-c\fP or \fB\-w\fP is given, both options are assumed.
-.
-.SH SETTING THE ENVIRONMENT
+.SS "Setting the Environment"
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 \fB\-s\fP option.
.sp
eval \(ga@TSET@ \-s options ... \(ga
.
-.SH TERMINAL TYPE MAPPING
+.SS "Terminal Type Mapping"
When the terminal is not hardwired into the system (or the current
system information is incorrect) the terminal type derived from the
\fI/etc/ttys\fP file or the \fBTERM\fP environmental variable is often
entire \fB\-m\fP option argument be placed within single quote characters,
and that \fBcsh\fP users insert a backslash character (\*(``\e\*('') before
any exclamation marks (\*(``!\*('').
-.SH HISTORY
-A \fBreset\fP command appeared in 1BSD (March 1978), written by Kurt Shoens.
-This program set the \fIerase\fP and \fIkill\fP characters
-to \fB\*^H\fP (backspace) and \fB@\fP respectively.
-Mark Horton improved that in 3BSD (October 1979), adding
-\fIintr\fP, \fIquit\fP, \fIstart\fP/\fIstop\fP and \fIeof\fP characters
-as well as changing the program to avoid modifying any user settings.
-That version of \fBreset\fP did not use the termcap database.
-.PP
-A separate \fBtset\fP command was provided in 1BSD by Eric Allman,
-using the termcap database.
-Allman's comments in the source code indicate
-that he began work in October 1977,
-continuing development over the next few years.
-.PP
-According to comments in the source code,
-the \fBtset\fP program was modified in September 1980,
-to use logic copied from the 3BSD \*(``reset\*(''
-when it was invoked as \fBreset\fP.
-This version appeared in 4.1cBSD, late in 1982.
+.SH OPTIONS
+The options are as follows:
+.TP 5
+.B \-c
+Set control characters and modes.
+.TP 5
+.BI \-e\ ch
+Set the erase character to \fIch\fP.
+.TP
+.B \-I
+Do not send the terminal or tab initialization strings to the terminal.
+.TP
+.BI \-i\ ch
+Set the interrupt character to \fIch\fP.
+.TP
+.BI \-k\ ch
+Set the line kill character to \fIch\fP.
+.TP
+.BI \-m\ mapping
+Specify a mapping from a port type to a terminal;
+see subsection \*(``Terminal Type Mapping\*(''.
+.TP
+.B \-Q
+Do not display any values for the erase, interrupt and line kill characters.
+Normally \fB@TSET@\fP displays the values for control characters which
+differ from the system's default values.
+.TP
+.B \-q
+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.
+.TP
+.B \-r
+Print the terminal type to the standard error output.
+.TP
+.B \-s
+Print the sequence of shell commands to initialize the environment variable
+\fBTERM\fP to the standard output;
+see subsection \*(``Setting the Environment\*(''.
+.TP
+.B \-V
+reports the version of ncurses which was used in this program, and exits.
+.TP
+.B \-w
+Resize the window to match the size deduced via \fBsetupterm\fP(3X).
+Normally this has no effect,
+unless \fBsetupterm\fP is not able to detect the window size.
.PP
-Other developers (e.g., Keith Bostic and Jim Bloom)
-continued to modify \fBtset\fP until 4.4BSD was released in 1993.
+The arguments for the \fB\-e\fP, \fB\-i\fP, and \fB\-k\fP
+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\*(''.
.PP
-The \fBncurses\fP implementation
-was lightly adapted from the 4.4BSD sources for a terminfo environment by Eric
-S. Raymond <esr@snark.thyrsus.com>.
-.SH COMPATIBILITY
+If neither \fB\-c\fP or \fB\-w\fP is given, both options are assumed.
+.SH ENVIRONMENT
+The \fB@TSET@\fP command uses these environment variables:
+.TP 5
+SHELL
+tells \fB@TSET@\fP whether to initialize \fBTERM\fP using \fBsh\fP(1) or
+\fBcsh\fP(1) syntax.
+.TP 5
+TERM
+Denotes your terminal type.
+Each terminal type is distinct, though many are similar.
+.TP 5
+TERMCAP
+may denote the location of a termcap database.
+If it is not an absolute pathname, e.g., begins with a \*(``/\*('',
+\fB@TSET@\fP removes the variable from the environment before looking
+for the terminal description.
+.SH FILES
+.TP 5
+/etc/ttys
+system port name to terminal type mapping database (BSD versions only).
+.TP
+.I \*d
+compiled terminal description database directory
+.SH PORTABILITY
Neither IEEE Std 1003.1/The Open Group Base Specifications Issue 7
(POSIX.1-2008) nor
X/Open Curses Issue 7 documents \fB@TSET@\fP or \fB@RESET@\fP.
.PP
-The AT&T \fBtput\fP utility (AIX, HPUX, Solaris)
+The AT&T \fBtput\fP utility (AIX, HP-UX, Solaris)
incorporated the terminal-mode manipulation as well as termcap-based features
such as resetting tabstops from \fBtset\fP in BSD (4.1c),
presumably with the intention of making \fBtset\fP obsolete.
is always an alias for \fBtset\fP.
.PP
The \fB@TSET@\fP utility provides for backward-compatibility with BSD
-environments (under most modern UNIXes, \fB/etc/inittab\fP and \fBgetty\fP(1)
+environments (under most modern Unices, \fB/etc/inittab\fP and \fBgetty\fP(1)
can set \fBTERM\fP appropriately for each dial-up line; this obviates what was
\fB@TSET@\fP's most important use).
This implementation behaves like 4.4BSD
Those have the drawback that if the window is resized,
those variables must be recomputed and reassigned.
To do this more easily, use the \fBresize\fP(1) program.
-.SH ENVIRONMENT
-The \fB@TSET@\fP command uses these environment variables:
-.TP 5
-SHELL
-tells \fB@TSET@\fP whether to initialize \fBTERM\fP using \fBsh\fP(1) or
-\fBcsh\fP(1) syntax.
-.TP 5
-TERM
-Denotes your terminal type.
-Each terminal type is distinct, though many are similar.
-.TP 5
-TERMCAP
-may denote the location of a termcap database.
-If it is not an absolute pathname, e.g., begins with a \*(``/\*('',
-\fB@TSET@\fP removes the variable from the environment before looking
-for the terminal description.
-.SH FILES
-.TP 5
-/etc/ttys
-system port name to terminal type mapping database (BSD versions only).
-.TP
-.I \*d
-compiled terminal description database directory
+.SH HISTORY
+A \fB\%reset\fP command written by Kurt Shoens appeared in 1BSD
+(March 1978).
+.\" https://minnie.tuhs.org/cgi-bin/utree.pl?file=1BSD/s6/reset.c
+It set the \fIerase\fP and \fIkill\fP characters
+to \fB\*^H\fP (backspace) and \fB@\fP respectively.
+Mark Horton improved this \fB\%reset\fP in 3BSD
+(October 1979),
+adding \fIintr\fP,
+\fIquit\fP,
+\fIstart\fP/\fIstop\fP,
+and \fIeof\fP
+characters as well as changing the program to avoid modifying any user
+settings.
+.\" https://minnie.tuhs.org/cgi-bin/utree.pl?file=3BSD/usr/src/cmd/\
+.\" reset.c
+That version of \fB\%reset\fP did not use \fI\%termcap\fP.
+.PP
+Eric Allman wrote a distinct \fBtset\fP command for 1BSD,
+using a forerunner of \fI\%termcap\fP called \fI\%ttycap\fP.
+.\" https://minnie.tuhs.org/cgi-bin/utree.pl?file=1BSD/s6/tset.c
+.\" https://minnie.tuhs.org/cgi-bin/utree.pl?file=1BSD/man7/ttycap.7
+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 \fI\%termcap\fP and handled the \fI\%TERMCAP\fP
+variable.
+.\" https://minnie.tuhs.org/cgi-bin/utree.pl?file=3BSD/usr/src/cmd/\
+.\" tset/tset.c
+Later comments indicate that \fBtset\fP was modified in September 1980
+to use logic copied from the 3BSD \*(``reset\*('' program when it was
+invoked as \fB\%reset\fP.
+.\" https://minnie.tuhs.org/cgi-bin/utree.pl?file=2.9BSD/usr/src/ucb/\
+.\" tset/tset.c
+This version appeared in 4.1cBSD, \" and backported to 2.9BSD
+late in 1982.
+Other developers such as Keith Bostic and Jim Bloom continued to modify
+\fBtset\fP until 4.4BSD was released in 1993.
+.PP
+The \fI\%ncurses\fP implementation was lightly adapted from the 4.4BSD
+sources to use the \fI\%terminfo\fP API by Eric S.\& Raymond
+<esr@snark.thyrsus.com>.
.SH SEE ALSO
\fB\%csh\fP(1),
\fB\%sh\fP(1),
projects / ncurses.git / blobdiff