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some manpage improvements, mostly from OpenBSD

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tg 2004-12-13 18:24:34 +00:00
parent 85a62c2ea2
commit f4b8bc819c
2 changed files with 117 additions and 105 deletions
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ksh.1tbl
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@ -1,6 +1,6 @@
.\" $MirBSD: src/bin/ksh/ksh.1tbl,v 2.1 2004/12/10 18:09:41 tg Exp $
.\" $MirBSD: src/bin/ksh/ksh.1tbl,v 2.2 2004/12/13 18:24:33 tg Exp $
.\" $OpenBSD: ksh.1tbl,v 1.79 2004/12/04 07:05:13 jaredy Exp $
.\" $OpenBSD: sh.1tbl,v 1.52 2004/11/09 21:56:54 jmc Exp $
.\" $OpenBSD: sh.1tbl,v 1.53 2004/12/10 01:56:56 jaredy Exp $
.\"
.\" Copyright (c) 1980, 1990, 1993
.\" The Regents of the University of California. All rights reserved.
@ -120,7 +120,7 @@ If there are no non-option
arguments, the shell reads commands from the standard input.
The name of
the shell (i.e., the contents of
.Va $0 )
.Ic $0 )
is determined as follows: if the
.Fl c
option is used and there is a non-option argument, it is used as the name;
@ -133,8 +133,8 @@ A shell is
.Dq interactive
if the
.Fl i
option is used or if both standard input and standard error are attached
to a tty.
option is used or if both standard input and standard error are attached to a
.Xr tty 4 .
An interactive shell has job control enabled (if available), ignores the
.Dv SIGINT ,
.Dv SIGQUIT
@ -347,7 +347,7 @@ The first three of these are the above mentioned quoting characters (see
.Sx Quoting
below);
.Ql # ,
if used at the beginning of a word, introduces a comment -- everything after
if used at the beginning of a word, introduces a comment \(em everything after
the
.Ql #
up to the nearest newline is ignored;
@ -450,7 +450,7 @@ only if the exit status of
.Ar cmd1
is zero;
.Ql ||
is the opposite --
is the opposite \(em
.Ar cmd2
is executed only if the exit status of
.Ar cmd1
@ -545,14 +545,14 @@ In the following compound command descriptions, command lists (denoted as
that are followed by reserved words must end with a semicolon, a newline, or
a (syntactically correct) reserved word.
For example,
.Bd -unfilled -offset -indent
.Bd -unfilled -offset indent
.Ic { echo foo; echo bar; }
.Ic { echo foo; echo bar<newline> }
.Ic { { echo foo; echo bar; } }
.Ed
.Pp
are all valid, but
.Bd -unfilled -offset -indent
.Bd -unfilled -offset indent
.Ic { echo foo; echo bar }
.Ed
.Pp
@ -630,7 +630,7 @@ If
.Ic in
is not used to specify a word list, the positional parameters
.Po
.Va $1 , $2 ,
.Ic $1 , $2 ,
etc.\&
.Pc
are used instead.
@ -721,7 +721,7 @@ statement is executed inside the loop.
If
.Ic in Ar word ...\&
is omitted, the positional parameters are used (i.e.,
.Va $1 , $2 ,
.Ic $1 , $2 ,
etc.).
For historical reasons, open and close braces may be used instead of
.Ic do
@ -1017,8 +1017,8 @@ As a special case, leading and trailing
.Ev IFS
whitespace and trailing
.Ev IFS
non-whitespace is stripped (i.e., no leading or trailing
empty field is created by it); leading or trailing
non-whitespace are stripped (i.e., no leading or trailing
empty field is created by it); leading
.Pf non- Ev IFS
whitespace does create an empty field.
.Pp
@ -1312,7 +1312,7 @@ Process ID of the last background process started.
If no background processes have been started, the parameter is not set.
.It Ev \&#
The number of positional parameters (i.e.,
.Va $1 , $2 ,
.Ic $1 , $2 ,
etc.).
.It Ev \&$
The process ID of the shell, or the
@ -1356,7 +1356,7 @@ Further positional parameters may be accessed using
.Ic ${ Ns Ar number Ns Ic \&} .
.It Ev \&*
All positional parameters (except parameter 0); i.e.,
.Va $1 , $2 , $3 ,
.Ic $1 , $2 , $3 ,
\&...
If used
outside of double quotes, parameters are separate words (which are subjected
@ -2028,7 +2028,7 @@ any redirections must appear at the end.
Redirections are processed after
pipelines are created and in the order they are given, so
.Pp
.Ic cat /foo/bar 2\&>&1 \&> /dev/null \&| cat -n
.Dl Ic cat /foo/bar 2\*(Gt&1 \*(Gt /dev/null \&| cat -n
.Pp
will print an error with a line number prepended to it.
.Ss Arithmetic expressions
@ -2262,7 +2262,7 @@ in that they are executed in the current environment.
However, unlike
.Li .-scripts ,
shell arguments (i.e., positional parameters
.Va $1 , $2 ,
.Ic $1 , $2 ,
etc.) are never visible
inside them.
When the shell is determining the location of a command, functions
@ -2321,7 +2321,9 @@ assignments made inside functions are visible after the function completes.
If this is not the desired effect, the
.Ic typeset
command can be used inside a function to create a local parameter.
Note that special parameters (e.g., $$, $\&!) can't be scoped in this way.
Note that special parameters (e.g.
.Ic \&$$ , $\&! )
can't be scoped in this way.
.Pp
The exit status of a function is that of the last command executed in the
function.
@ -2337,8 +2339,11 @@ defined with the
notation:
.Bl -bullet
.It
The $0 parameter is set to the name of the function (Bourne-style functions
leave $0 untouched).
The
.Ic $0
parameter is set to the name of the function (Bourne-style functions leave
.Ic $0
untouched).
.It
Parameter assignments preceding function calls are not kept in the shell
environment (executing Bourne-style functions will keep assignments).
@ -2438,7 +2443,7 @@ mode, signal names are listed one per line; in
.Pf non- Tn POSIX
mode,
signal numbers, names, and descriptions are printed in columns.
In future, a new option
In the future, a new option
.Po Fl v
\ perhaps
.Pc
@ -2596,7 +2601,9 @@ mode, the expression
.Sq Ic \&!
arguments) is always true as it is a non-zero length string; in
.Pf non- Tn POSIX
mode, it tests if file descriptor 1 is a tty (i.e., the
mode, it tests if file descriptor 1 is a
.Xr tty 4
(i.e., the
.Ar fd
argument to the
.Fl t
@ -2640,7 +2647,9 @@ special commands
.Ic readonly , return , set , shift ,
.Ic trap , unset
.Pp
Additional ksh special commands
Additional
.Nm
special commands
.Pp
.Ic builtin , times , typeset
.Pp
@ -2657,12 +2666,16 @@ regular commands
.Ic jobs , kill , read , true ,
.Ic umask , unalias , wait
.Pp
Additional ksh regular commands
Additional
.Nm
regular commands
.Pp
.Ic \&[ , echo , let , print ,
.Ic pwd , test , ulimit , whence
.Pp
In the future, the additional ksh special and regular commands may be treated
In the future, the additional
.Nm
special and regular commands may be treated
differently from the
.Tn POSIX
special and regular commands.
@ -2693,8 +2706,7 @@ Exit status is set to zero.
.Op Ic +-
.Oo Ar name
.Op Ns = Ns Ar value
.Ar ...
.Oc
.Ar ... Oc
.Xc
Without arguments,
.Ic alias
@ -2944,7 +2956,7 @@ The shell exits with the specified exit status.
If
.Ar status
is not specified, the exit status is the current value of the
.Ic \&?
.Ic $\&?
parameter.
.It Xo Ic export Op Fl p
.Op Ar parameter Ns Op \&= Ns Ar value
@ -3118,10 +3130,10 @@ below for the format of
.Ar job
and the displayed job.
.It Xo Ic kill
.Oo Fl s Ar signame No \&|
.Fl signum No \&| Fl signame Oc {
.Ar job No \&|
.Ar pid No \&|
.Oo Fl s Ar signame \*(Ba
.Fl Ar signum | Fl Ar signame Oc {
.Ar job |
.Ar pid |
.Ar pgrp No } Ar ...
.Xc
Send the specified signal to the specified jobs, process IDs, or process
@ -3153,7 +3165,7 @@ Since expressions may need to be quoted,
is syntactic sugar for
.Ic let \&" Ns Ar expr Ns Ic \&" .
.It Xo Ic print
.Oo Fl nprsu Ns Ar n No \&|
.Oo Fl nprsu Ns Ar n \*(Ba
.Fl R Op Fl en Oc
.Op Ar argument ...
.Xc
@ -3205,7 +3217,7 @@ The
.Fl R
option is used to emulate, to some degree, the
.Bx
.Xr echo
.Xr echo 1
command, which does not process
.Ql \e
sequences unless the
@ -3258,7 +3270,9 @@ exits with a non-zero status.
.Pp
The first parameter may have a question mark and a string appended to it, in
which case the string is used as a prompt (printed to standard error before
any input is read) if the input is a tty (e.g.,
any input is read) if the input is a
.Xr tty 4
(e.g.,
.Ic read nfoo?'number of foos: ' ) .
.Pp
The
@ -3517,7 +3531,9 @@ Enable vi-like command-line editing (interactive shells only).
No effect.
In the original Korn shell, unless
.Ic viraw
was set, the vi command-line mode would let the tty driver do the work until
was set, the vi command-line mode would let the
.Xr tty 4
driver do the work until
.Tn ESC
(^[) was entered.
.Nm pdksh
@ -3547,7 +3563,7 @@ will print the long names of all options that are currently on.
.Pp
Remaining arguments, if any, are positional parameters and are assigned, in
order, to the positional parameters (i.e.
.Va $1 , $2 ,
.Ic $1 , $2 ,
etc.).
If options end with
.Ql --
@ -3555,7 +3571,7 @@ and there are no remaining arguments, all positional parameters are cleared.
If no options or arguments are given, the values of all names are printed.
For unknown historical reasons, a lone
.Ql -
option is treated specially -- it clears both the
option is treated specially \(em it clears both the
.Fl x
and
.Fl v
@ -3674,35 +3690,24 @@ doesn't exist (thus
returns true if and only if option
.Ar foo
exists).
.It Ar file Fl nt Ar file
first
.Ar file
is newer than second
.Ar file
or first
.Ar file
exists and the second
.Ar file
does not.
.It Ar file Fl ot Ar file
first
.Ar file
is older than second
.Ar file
or second
.Ar file
exists and the first
.Ar file
does not.
.It Ar file Fl ef Ar file
first
.Ar file
is the same file as second
.Ar file .
.It Ar file1 Fl nt Ar file2
.Ar file1
is newer than
.Ar file2 .
.It Ar file1 Fl ot Ar file2
.Ar file1
is older than
.Ar file2 .
.It Ar file1 Fl ef Ar file2
.Ar file1
is the same file as
.Ar file2 .
.It Fl t Op Ar fd
File descriptor
.Ar fd
is a tty device.
is a
.Xr tty 4
device.
If the
.Ic posix
option is not set,
@ -3713,7 +3718,24 @@ to the special
rules described below).
.It Ar string
.Ar string
is not empty.
is not empty (has non-zero length).
Note that there is the potential for problems if
.Ar string
turns out to be an operator (e.g.,
.Fl r ) .
It is generally better to use a test like
.Sm off
.Ic \&[\ X\&" Ar string Ic \&" Ic \ \&]
.Sm on
or (on
.Nm ksh
only)
.Sm off
.Ic \&[\&[ Fl n Ar string Ic \ \&]\&]
.Sm on
instead (double quotes are used in case
.Ar string
contains spaces or file globbing characters).
.It Fl z Ar string
.Ar string
is empty.
@ -3846,8 +3868,8 @@ but those of the second command do.
Print the accumulated user and system times used by the shell and by processes
which have exited that the shell started.
.It Ic trap Op Ar handler signal ...
Sets trap handler that is to be executed when any of the specified signals are
received.
Sets a trap handler that is to be executed when any of the
specified signals are received.
.Ar handler
is either a
.Dv NULL
@ -3894,7 +3916,7 @@ commands, the current state of the traps that have been set since the shell
started.
Note that the output of
.Ic trap
can not be usefully piped to another process (an artifact of the fact that
cannot be usefully piped to another process (an artifact of the fact that
traps are cleared when subprocesses are created).
.Pp
The original Korn shell's
@ -4019,7 +4041,7 @@ This is the default action (option exists for ksh93 compatibility).
.It Fl r
Read-only attribute.
Parameters with this attribute may not be assigned to or unset.
Once this attribute is set, it can not be turned off.
Once this attribute is set, it cannot be turned off.
.It Fl t
Tag attribute.
Has no meaning to the shell; provided for application use.
@ -4071,7 +4093,7 @@ limit is imposed.
Note that some systems may not allow limits to be increased
once they are set.
Also note that the types of limits available are system
dependent -- some systems have only the
dependent \(em some systems have only the
.Fl f
limit.
.Bl -tag -width 5n
@ -4287,8 +4309,9 @@ A job may be referred to in the
and
.Ic wait
commands either by the process ID of the last process in the command pipeline
(as stored in the $! parameter) or by prefixing the job number with a percent
sign
(as stored in the
.Ic $\&!
parameter) or by prefixing the job number with a percent sign
.Pq Sq % .
Other percent sequences can also be used to refer to jobs:
.Bl -tag -width 10n
@ -4317,8 +4340,9 @@ The job starting with string
.Pp
When a job changes state (e.g., a background job finishes or foreground job is
stopped), the shell prints the following status information:
.Pp
.Bd -unfilled -offset indent
.Ic \&[ Ar number Ic \&] Ar flag status command
.Ed
.Pp
where
.Bl -tag -width "status"
@ -4340,7 +4364,7 @@ indicates the current state of the job and can be:
The job has neither stopped nor exited (note that running does not necessarily
mean consuming
.Tn CPU
time -- the process could be blocked waiting for some
time \(em the process could be blocked waiting for some
event).
.It Cm Done Op Ar number
The job exited.
@ -4384,15 +4408,18 @@ is immediately made to exit the shell, the running jobs are sent a
.Dv SIGHUP
signal and the shell exits.
.Ss Interactive input line editing
The shell supports three modes of reading command lines from a tty in an
interactive session, which is controlled by the
The shell supports three modes of reading command lines from a
.Xr tty 4
in an interactive session, which is controlled by the
.Ic emacs ,
.Ic gmacs
and
.Ic vi
options (at most one of these can be set at once).
If none of these options are enabled, the shell simply reads lines using the
normal tty driver.
If none of these options are enabled, the shell simply
reads lines using the normal
.Xr tty 4
driver.
If the
.Ic emacs
or
@ -4503,7 +4530,9 @@ Furthermore, many editing commands are useful only on terminals with
a visible cursor.
The default bindings were chosen to resemble corresponding
Emacs key bindings.
The users' tty characters (e.g.,
The users'
.Xr tty 4
characters (e.g.,
.Dv ERASE )
are bound to
reasonable substitutes and override the default bindings.
@ -4793,8 +4822,9 @@ mode.
In insert mode, most characters are simply put in the buffer at the
current cursor position as they are typed; however, some characters are
treated specially.
In particular, the following characters are taken from
current tty settings (see
In particular, the following characters are taken from current
.Xr tty 4
settings (see
.Xr tty 1 )
and have their usual meaning (normal values are in parentheses): kill (^U),
erase (^?), werase (^W), eof (^D), intr (^C), and quit (^\e).
@ -5219,6 +5249,7 @@ deleted and a new prompt to be printed.
.Xr srand 3 ,
.Xr srandom 3 ,
.Xr system 3 ,
.Xr tty 4 ,
.Xr environ 7
.Pp
.Pa http://docsrv.sco.com:507/en/man/html.C/sh.C.html

29
sh.1tbl
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@ -1,4 +1,4 @@
.\" $MirBSD: src/bin/ksh/sh.1tbl,v 2.1 2004/12/10 18:09:42 tg Exp $
.\" $MirBSD: src/bin/ksh/sh.1tbl,v 2.2 2004/12/13 18:24:34 tg Exp $
.\" _MirBSD: src/bin/ksh/ksh.1tbl,v 1.41 2004/11/10 17:18:29 tg Exp $
.\" $OpenBSD: ksh.1tbl,v 1.78 2004/11/08 23:42:02 jmc Exp $
.\" $OpenBSD: sh.1tbl,v 1.52 2004/11/09 21:56:54 jmc Exp $
@ -2333,15 +2333,6 @@ is assumed.
This command is only available on systems which support job control (see
.Sx Job control
below for more information).
.It Xo
.Ic bind Op Fl m
.Oo Ar key
.Op Ns = Ns Ar editing-command
.Ar ... Oc
.Xc
Set or view the current emacs command editing key bindings/macros.
.Nm
should now have the emacs mode according to the Bourne shell documentation.
.It Ic break Op Ar level
Exit the
.Ar level Ns th
@ -3075,20 +3066,6 @@ and
statements.
The following basic expressions are available:
.Bl -tag -width 17n
.It Ar str
.Ar str
has non-zero length.
Note that there is the potential for problems if
.Ar str
turns out to be an operator (e.g.,
.Fl r ) .
It is generally better to use a test like
.Sm off
.Ic \&[\ X\&" Ar str Ic \&" Ic \ \&]
.Sm on
instead (double quotes are used in case
.Ar str
contains spaces or file globbing characters).
.It Fl r Ar file
.Ar file
exists and is readable.
@ -3334,6 +3311,10 @@ lists, as a series of
.Ic trap
commands, the current state of the traps that have been set since the shell
started.
Note that the output of
.Ic trap
cannot be usefully piped to another process (an artifact of the fact that
traps are cleared when subprocesses are created).
.Pp
The original Korn shell's
.Dv DEBUG