On Wed, Jun 05, 2002 at 05:23:07PM -0400, Mike Dresser wrote: > Here's a code fragment i'm trying to work on in bash > > I'm pulling a backup, and if smbtar aborts for whatever reason, I need > to know not to rotate the backup. > > smbtar -s $username -x $share -p $password -t - | gzip -1 > $filename.tar.gz > if [ $? -eq 0 ]; then > # rotate the backup; > fi; > # else go on to the next machine > > The problem is, $? reports the result of the last command, which is gzip, > which will ALWAYS report 0(well, unless the hd is full or the moon is > full), because smbtar spits out data to it. If I remove the gzip -1, it > works as expected.
man bash
search for PIPESTATUS:
PIPESTATUS
An array variable (see Arrays below) containing a list of
exit status values from the processes in the
most-recently-executed foreground pipeline
(which may contain only a single command).
> I need to gzip on the fly, because smbtar doesn't a) support compression,
> and b) 2gb filesize limits and these workstations are over 2gb in some
> cases, and c) disk space isn't free. If it wasn't for b) I'd gzip after a
> backup is done.
>
> Anyone have any ideas? My current method is to check if the backup is
> over a predefined size, but that doesn't work if the backup crashed over
> that size), so I'm trying to do it properly.
>
> Mike
>
>
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--
Karl E. Jørgensen
[EMAIL PROTECTED]
www.karl.jorgensen.com
==== Today's fortune:
Anyone who imagines that all fruits ripen at the same time
as the strawberries, knows nothing about grapes.
-- Philippus Paracelsus
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