On Wed, May 14, 2008 at 02:29:09PM +0000, Eric Blake wrote:
> Does anyone have access to FreeBSD, or know what shell heritage their /bin/sh
> has? This patch was extracted from reports on the git mailing list against
> the
> FreeBSD 6.1 /bin/sh, which I don't have access to. But I reproduced the
> issues
> using cygwin's ash, so I'm documenting them.
Indeed, ash and {Free,Net}BSD /bin/sh have a common origin.
> http://marc.info/?l=git&m=121073772610342&w=2
> corrupted $? when combining && and |
>
> $ sh -c 'true && ! true | true; echo $?'
> 1
> $ ash -c 'true && ! true | true; echo $?'
> 0
This bug is unrelated to `&&', affecting any `!'-ed pipeline:
$ sh -c '! : | :'; echo $?
1
$ ash -c '! : | :'; echo $?
0
Ash evaluates the pipeline like `{ ! :; } | :'. Also note this bug affecting
`!' with a compound command.
$ sh -c '! { :; }'
$ ash -c '! { :; }'
{: not found
Syntax error: "}" unexpected
