Jeffrey writes:

> As many know, I use rsync in DumpPreUserCmd to run my shadowmountrsync
> routine on the remote client. This routine has many legitimate reasons
> for not returning success.
> 
> However, the backuppc log often shows on failure:
>                  2009-11-24 11:00:04 DumpPreUserCmd returned error status 
> 512... exiting
> 
> I don't understand the 512 status since the rsync man pages lists
> return codes as 0-35. So what does 512 mean?

It's 256 * exitStatus, so the exit status is 2.  The lower 8 bits are
the signal number, if any, that killed the process.

Craig

       $?      The status returned by the last pipe close, backtick ("``")
               command, successful call to wait() or waitpid(), or from the
               system() operator.  This is just the 16-bit status word
               returned by the traditional Unix wait() system call (or else is
               made up to look like it).  Thus, the exit value of the
               subprocess is really ("$? >> 8"), and "$? & 127" gives which
               signal, if any, the process died from, and "$? & 128" reports
               whether there was a core dump.


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