[Libguestfs] [PATCH v2 1/2] lib: command: If command fails, exit with 126 or 127 as defined by POSIX.

[Pino Toscano]

On Friday, 6 October 2017 15:52:16 CET Richard W.M. Jones wrote:
> If running the external command fails in "argv mode" (ie. when
> not using the shell), then exit with either 126 or 127 as defined
> by POSIX.
> 
> This is mostly the same as what bash does, see
> execute_cmd.c:shell_execve in the bash sources.
> 
> Note: saving errno around perror(3) if necessary, otherwise you will
> see different behaviour between verbose and non-verbose mode.  In
> non-verbose mode, perror(3) tried to print to a closed file
> descriptor, failing and overwriting errno.  That took some time to
> debug.
> ---

LGTM.

Thanks,
-- 
Pino Toscano
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