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Re: [PATCH] Shell functions and variables may share a namespace.
From: |
Ralf Wildenhues |
Subject: |
Re: [PATCH] Shell functions and variables may share a namespace. |
Date: |
Thu, 15 Nov 2007 07:58:40 +0100 |
User-agent: |
Mutt/1.5.13 (2006-08-11) |
Hi Eric,
* Eric Blake wrote on Thu, Nov 15, 2007 at 02:25:51AM CET:
> According to Ralf Wildenhues on 11/14/2007 2:01 PM:
> > * doc/autoconf.texi (Portable Shell): Mention Solaris sh limitation.
> > ---
> > OK to apply?
>
> Yes. Is it worth also mentioning the workaround that autotest uses of a
> reserved prefix like at_func_ for all functions?
Sure, why not. Applied like this.
Thanks,
Ralf
Shell functions and variables may share a namespace.
* doc/autoconf.texi (Portable Shell): Mention Solaris sh
limitation.
diff --git a/doc/autoconf.texi b/doc/autoconf.texi
index 12eef55..c7f8d2a 100644
--- a/doc/autoconf.texi
+++ b/doc/autoconf.texi
@@ -12162,7 +12162,16 @@ you should not rely on the error status of a subshell
if the last
command of that subshell was @code{exit} or @code{trap}, as this
triggers bugs in zsh 4.x; while Autoconf tries to find a shell that
does not exhibit the bug, zsh might be the only shell present on the
-user's machine.
+user's machine. Also, variables and functions may share a namespace,
+for example with Solaris 10 @command{/bin/sh}:
+
address@hidden
+$ @kbd{f () @{ :; @}; f=; f}
+f: not found
address@hidden example
+
address@hidden
+For this reason, Autotest uses the prefix @samp{at_func_} for its functions.
Some ancient systems have quite
small limits on the length of the @samp{#!} line; for instance, 32