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portable hogwash

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tg 2010-08-14 19:55:37 +00:00
parent c187f3089f
commit 14dc6071e7
1 changed files with 2 additions and 19 deletions
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mksh.1
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@ -1,4 +1,4 @@
.\" $MirOS: src/bin/mksh/mksh.1,v 1.232 2010/07/17 22:09:37 tg Exp $ .\" $MirOS: src/bin/mksh/mksh.1,v 1.233 2010/08/14 19:55:37 tg Exp $
.\" $OpenBSD: ksh.1,v 1.136 2010/07/15 20:04:35 schwarze Exp $ .\" $OpenBSD: ksh.1,v 1.136 2010/07/15 20:04:35 schwarze Exp $
.\"- .\"-
.\" Copyright © 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 .\" Copyright © 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
@ -71,7 +71,7 @@
.\" with -mandoc, it might implement .Mx itself, but we want to .\" with -mandoc, it might implement .Mx itself, but we want to
.\" use our own definition. And .Dd must come *first*, always. .\" use our own definition. And .Dd must come *first*, always.
.\" .\"
.Dd $Mdocdate: July 17 2010 $ .Dd $Mdocdate: August 14 2010 $
.\" .\"
.\" Check which macro package we use .\" Check which macro package we use
.\" .\"
@ -601,15 +601,6 @@ done fi in until {
elif for select while } elif for select while }
.Ed .Ed
.Pp .Pp
.Sy Note :
Some shells (but not this one) execute control structure commands in a
subshell when one or more of their file descriptors are redirected, so any
environment changes inside them may fail.
To be portable, the
.Ic exec
statement should be used instead to redirect file descriptors before the
control structure.
.Pp
In the following compound command descriptions, command lists (denoted as In the following compound command descriptions, command lists (denoted as
.Em list ) .Em list )
that are followed by reserved words must end with a semicolon, a newline, or that are followed by reserved words must end with a semicolon, a newline, or
@ -905,14 +896,6 @@ expressions are patterns (e.g. the comparison
.Ic \&[[ foobar = f*r ]] .Ic \&[[ foobar = f*r ]]
succeeds). succeeds).
.It .It
The single argument form of
.Ic test ,
which tests if the argument has a non-zero length, is not portable,
e.g. instead of
.No \&[ Ar str No \&]
use
.No \&[[ \-n Ar str No \&]] .
.It
Parameter, command, and arithmetic substitutions are performed as expressions Parameter, command, and arithmetic substitutions are performed as expressions
are evaluated and lazy expression evaluation is used for the are evaluated and lazy expression evaluation is used for the
.Ql && .Ql &&