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document some more on how the terminal state is affected 

From: G.raud Meyer <graud@gmx.com> (mostly)
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tg 2018-04-27 17:10:39 +00:00
parent 8d2c435f0f
commit 7a794d4dee
1 changed files with 17 additions and 8 deletions
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@ -1,4 +1,4 @@
.\" $MirOS: src/bin/mksh/mksh.1,v 1.453 2018/04/16 00:32:35 tg Exp $
.\" $MirOS: src/bin/mksh/mksh.1,v 1.454 2018/04/27 17:10:39 tg Exp $
.\" $OpenBSD: ksh.1,v 1.160 2015/07/04 13:27:04 feinerer Exp $
.\"-
.\" Copyright © 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
@ -77,7 +77,7 @@
.\" with -mandoc, it might implement .Mx itself, but we want to
.\" use our own definition. And .Dd must come *first*, always.
.\"
.Dd $Mdocdate: April 16 2018 $
.Dd $Mdocdate: April 27 2018 $
.\"
.\" Check which macro package we use, and do other -mdoc setup.
.\"
@ -5199,6 +5199,15 @@ option differs: the search path is not affected in
.Ic whence ,
but the search is restricted to the path.
.El
.Ss Terminal state
The state of the controlling terminal can be modified by a command executed
in the shell, whether or not job control is enabled.
The modified terminal state is not retained when the command exits
unsuccessfully (i.e.\& with a non-zero status), or when job control is
enabled and the command had been momentarily stopped (then restarted).
In interactive mode, when line editing is enabled, the terminal state is
saved before being reconfigured by the shell for the line editor, then
restored before running a command.
.Ss Job control
Job control refers to the shell's ability to monitor and control jobs which
are processes or groups of processes created for commands or pipelines.
@ -5213,14 +5222,14 @@ or
.Ic set Fl o Ic monitor ) ,
as it is for interactive shells, the processes of a job are placed in their
own process group.
Foreground jobs can be stopped by typing the suspend
character from the terminal (normally \*(haZ), jobs can be restarted in either the
foreground or background using the
Foreground jobs can be stopped by typing the suspend character from
the terminal (normally \*(haZ); jobs can be restarted in either the
foreground or background using the commands
.Ic fg
and
.Ic bg
commands, and the state of the terminal is saved or restored when a foreground
job is stopped or restarted, respectively.
.Ic bg .
The state of the terminal is saved or restored when a job initially
started in the foreground is stopped or restarted, respectively.
.Pp
Note that only commands that create processes (e.g. asynchronous commands,
subshell commands and non-built-in, non-function commands) can be stopped;