[PATCH] Document a bug in GNU Bash with {...} blocks and redirections.

[Benoit Sigoure]

        * doc/autoconf.texi (Limitations of Builtins): Mention that GNU Bash
        doesn't properly set $? when `{ ... } >/bad' fails.
        (Use re-wording from Jim Meyering)

Signed-off-by: Benoit Sigoure <address@hidden>
---
 ChangeLog         |    7 +++++++
 doc/autoconf.texi |   15 +++++++++++++++
 2 files changed, 22 insertions(+), 0 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 1407834..6c4f1b2 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2007-11-02  Benoit Sigoure  <address@hidden>
+
+       Document a bug in GNU Bash with {...} blocks and redirections.
+       * doc/autoconf.texi (Limitations of Builtins): Mention that GNU Bash
+       doesn't properly set $? when `{ ... } >/bad' fails.
+       (Use re-wording from Jim Meyering)
+
 2007-10-31  Benoit Sigoure  <address@hidden>
 
        Explain how to define $(AUTOM4TE) to generate `testsuite'.
diff --git a/doc/autoconf.texi b/doc/autoconf.texi
index 5d2b564..1b54739 100644
--- a/doc/autoconf.texi
+++ b/doc/autoconf.texi
@@ -13494,6 +13494,7 @@ the @samp{x} into account later in the pipe.
 
 @table @asis
 @item @command{.}
address@hidden --------------
 @prindex @command{.}
 Use @command{.} only with regular files (use @samp{test -f}).  Bash
 2.03, for instance, chokes on @samp{. /dev/null}.  Also, remember that
@@ -13502,6 +13503,7 @@ you want to use @command{.} on a file @file{foo} in the 
current
 directory, you must use @samp{. ./foo}.
 
 @item @command{!}
address@hidden --------------
 @prindex @command{!}
 The Unix version 7 shell did not support
 negating the exit status of commands with @command{!}, and this feature
@@ -13528,6 +13530,19 @@ More generally, one can always rewrite @samp{! 
@var{command}} as:
 if @var{command}; then (exit 1); else :; fi
 @end example
 
address@hidden @address@hidden@}}
address@hidden --------------------
address@hidden @address@hidden@}}
+Some versions of GNU Bash do not properly set @samp{$?} when
+writing the output from a @address@hidden@}} block fails.
+
address@hidden
+$ sh -c '@{ echo foo; @} >/bad; echo $?'
+sh: line 1: /bad: Permission denied
+0
address@hidden example
+
+
 @item @command{break}
 @c ------------------
 @prindex @command{break}
-- 
1.5.3.4.398.g859b