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diff --git a/doc/html/man/tset.1.html b/doc/html/man/tset.1.html
index 8d2b4e3e..4c5ad2fd 100644
--- a/doc/html/man/tset.1.html
+++ b/doc/html/man/tset.1.html
@@ -1,6 +1,6 @@
@@ -45,60 +45,75 @@
-
-
+
tset, reset - terminal initialization
-
-
+
tset [-IQVcqrsw] [-] [-e ch] [-i ch] [-k ch] [-m mapping]
[terminal]
reset [-IQVcqrsw] [-] [-e ch] [-i ch] [-k ch] [-m mapping]
[terminal]
-
-
- Tset initializes terminals. Tset first determines the
- type of terminal that you are using. This determination
- is done as follows, using the first terminal type found.
+
+
+
+ This program initializes terminals.
+
+ First, tset retrieves the current terminal mode settings
+ for your terminal. It does this by successively testing
+
+ o the standard error,
+
+ o standard output,
+
+ o standard input and
+
+ o ultimately "/dev/tty"
+
+ to obtain terminal settings. Having retrieved these set-
+ tings, tset remembers which file descriptor to use when
+ updating settings.
+
+ Next, tset determines the type of terminal that you are
+ using. This determination is done as follows, using the
+ first terminal type found.
1. The terminal argument specified on the command line.
2. The value of the TERM environmental variable.
- 3. (BSD systems only.) The terminal type associated with
- the standard error output device in the /etc/ttys file.
- (On System-V-like UNIXes and systems using that conven-
+ 3. (BSD systems only.) The terminal type associated with
+ the standard error output device in the /etc/ttys file.
+ (On System-V-like UNIXes and systems using that conven-
tion, getty does this job by setting TERM according to the
type passed to it by /etc/inittab.)
4. The default terminal type, "unknown".
- If the terminal type was not specified on the command-
- line, the -m option mappings are then applied (see the
+ If the terminal type was not specified on the command-
+ line, the -m option mappings are then applied (see the
section TERMINAL TYPE MAPPING for more information).
- Then, if the terminal type begins with a question mark
+ Then, if the terminal type begins with a question mark
("?"), the user is prompted for confirmation of the termi-
- nal 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 terminfo entry
- for the terminal is retrieved. If no terminfo entry is
- found for the type, the user is prompted for another ter-
+ nal 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 terminfo entry
+ for the terminal is retrieved. If no terminfo entry is
+ found for the type, the user is prompted for another ter-
minal type.
- Once the terminfo entry is retrieved, the window size,
- backspace, interrupt and line kill characters (among many
+ Once the terminfo entry is retrieved, the window size,
+ backspace, interrupt and line kill characters (among many
other things) are set and the terminal and tab initializa-
- tion strings are sent to the standard error output.
- 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.
- Use the -c or -w option to select only the window sizing
- versus the other initialization. If neither option is
- given, both are assumed.
+ tion strings are sent to the standard error output.
+ 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.
+
+
When invoked as reset, tset sets cooked and echo modes,
turns off cbreak and raw modes, turns on newline transla-
tion and resets any unset special characters to their
@@ -107,13 +122,15 @@
leaving a terminal in an abnormal state. Note, you may
have to type
- <LF>reset<LF>
+ <LF>reset<LF>
(the line-feed character is normally control-J) to get the
terminal to work, as carriage-return may no longer work in
the abnormal state. Also, the terminal will often not
echo the command.
+
+
The options are as follows:
-c Set control characters and modes.
@@ -138,7 +155,7 @@
-q The terminal type is displayed to the standard out-
put, and the terminal is not initialized in any way.
- The option `-' by itself is equivalent but archaic.
+ The option "-" by itself is equivalent but archaic.
-r Print the terminal type to the standard error output.
@@ -154,12 +171,13 @@
setupterm is not able to detect the window size.
The arguments for the -e, -i, and -k options may either be
- entered as actual characters or by using the `hat' nota-
+ entered as actual characters or by using the "hat" nota-
tion, i.e., control-h may be specified as "^H" or "^h".
+ If neither -c or -w is given, both options are assumed.
-
-
+
+
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 -s option.
@@ -176,8 +194,7 @@
eval `tset -s options ... `
-
-
+
When the terminal is not hardwired into the system (or the
current system information is incorrect) the terminal type
derived from the /etc/ttys file or the TERM environmental
@@ -186,10 +203,10 @@
often desirable to provide information about the type of
terminal used on such ports.
- The purpose of the -m option is to map from some set of
- conditions to a terminal type, that is, to tell tset "If
- I'm on this port at a particular speed, guess that I'm on
- that kind of terminal".
+ The -m options maps from some set of conditions to a ter-
+ minal type, that is, to tell tset "If I'm on this port at
+ a particular speed, guess that I'm on that kind of termi-
+ nal".
The argument to the -m option consists of an optional port
type, an optional operator, an optional baud rate specifi-
@@ -236,32 +253,54 @@
marks ("!").
-
-
- The tset command appeared in BSD 3.0. The ncurses imple-
- mentation was lightly adapted from the 4.4BSD sources for
- a terminfo environment by Eric S. Raymond <esr@snark.thyr-
- sus.com>.
+
+ A reset command appeared in 2BSD (1979), written by Kurt
+ Shoens.
+ A separate tset command was provided in 2BSD by Eric All-
+ man. While the oldest published source (from 1979) pro-
+ vides both programs, Allman's comments in the 2BSD source
+ code indicate that he began work in October 1977, continu-
+ ing development over the next few years.
-
-
- The tset utility has been provided for backward-compati-
- bility with BSD environments (under most modern UNIXes,
- /etc/inittab and getty(1) can set TERM appropriately for
- each dial-up line; this obviates what was tset's most
- important use). This implementation behaves like 4.4BSD
- tset, with a few exceptions specified here.
-
- The -S option of BSD tset no longer works; it prints an
- error message to stderr and dies. The -s option only sets
- TERM, not TERMCAP. Both of these changes are because the
- TERMCAP variable is no longer supported under terminfo-
- based ncurses, which makes tset -S useless (we made it die
- noisily rather than silently induce lossage).
+ In 1980, Eric Allman modified tset to provide a "reset"
+ feature when the program was invoked as reset.
+
+ The ncurses implementation was lightly adapted from the
+ 4.4BSD sources for a terminfo environment by Eric S. Ray-
+ mond <esr@snark.thyrsus.com>.
+
+
+
+ Neither IEEE Std 1003.1/The Open Group Base Specifications
+ Issue 7 (POSIX.1-2008) nor X/Open Curses Issue 7 documents
+ tset or reset.
+
+ The AT&T tput utility (AIX, HPUX, Solaris) incorporated
+ the terminal-mode manipulation as well as termcap-based
+ features such as resetting tabstops from tset in BSD
+ (4.1c), presumably with the intention of making tset obso-
+ lete. However, each of those systems still provides tset.
+ In fact, the commonly-used reset utility is always an
+ alias for tset.
+
+ The tset utility provides for backward-compatibility with
+ BSD environments (under most modern UNIXes, /etc/inittab
+ and getty(1) can set TERM appropriately for each dial-up
+ line; this obviates what was tset's most important use).
+ This implementation behaves like 4.4BSD tset, with a few
+ exceptions specified here.
+
+ A few options are different because the TERMCAP variable
+ is no longer supported under terminfo-based ncurses:
+
+ o The -S option of BSD tset no longer works; it prints
+ an error message to the standard error and dies.
+
+ o The -s option only sets TERM, not TERMCAP.
There was an undocumented 4.4BSD feature that invoking
- tset via a link named `TSET` (or via any other name begin-
+ tset via a link named "TSET" (or via any other name begin-
ning with an upper-case letter) set the terminal to use
upper-case only. This feature has been omitted.
@@ -271,23 +310,54 @@
-d, and -p 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 -m option instead. The -n
- option remains, but has no effect. The -adnp options are
- therefore omitted from the usage summary above.
-
- It is still permissible to specify the -e, -i, and -k
- options without arguments, although it is strongly recom-
- mended that such usage be fixed to explicitly specify the
+ options be changed to use the -m option instead. The -a,
+ -d, and -p 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 tset provided a
+ -n 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 -e, -i, and -k
+ options without arguments, although it is strongly recom-
+ mended that such usage be fixed to explicitly specify the
character.
- As of 4.4BSD, executing tset as reset no longer implies
+ As of 4.4BSD, executing tset as reset no longer implies
the -Q option. Also, the interaction between the - option
and the terminal argument in some historic implementations
of tset has been removed.
-
-
-
+ The -c and -w options are not found in earlier implementa-
+ tions. However, a different window size-change feature
+ was provided in 4.4BSD.
+
+ o In 4.4BSD, tset uses the window size from the termcap
+ description to set the window size if tset is not able
+ to obtain the window size from the operating system.
+
+ o In ncurses, tset obtains the window size using
+ setupterm, which may be from the operating system, the
+ LINES and COLUMNS environment variables or the termi-
+ nal description.
+
+ Obtaining the window size from the terminal description is
+ common to both implementations, but considered obsoles-
+ cent. 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 oper-
+ ating system (and setupterm would still fail). For that
+ reason, the LINES and COLUMNS 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 resize(1) program.
+
+
+
The tset command uses these environment variables:
SHELL
@@ -299,13 +369,12 @@
TERMCAP
may denote the location of a termcap database. If it
- is not an absolute pathname, e.g., begins with a `/',
+ is not an absolute pathname, e.g., begins with a "/",
tset removes the variable from the environment before
looking for the terminal description.
-
-
+
/etc/ttys
system port name to terminal type mapping database
(BSD versions only).
@@ -314,12 +383,11 @@
terminal capability database
-
-
+
csh(1), sh(1), stty(1), curs_terminfo(3x), tty(4),
terminfo(5), ttys(5), environ(7)
- This describes ncurses version 6.0 (patch 20151205).
+ This describes ncurses version 6.0 (patch 20161224).
@@ -329,7 +397,13 @@