[Libguestfs] [PATCH 2/2] Use 'error' function for fprintf followed by exit.
Pino Toscano
ptoscano at redhat.com
Mon Apr 4 13:06:52 UTC 2016
On Monday 04 April 2016 13:28:51 Richard W.M. Jones wrote:
> Like with the previous commit, this replaces instances of:
>
> if (something_bad) {
> fprintf (stderr, "%s: error message\n", guestfs_int_program_name);
> exit (EXIT_FAILURE);
> }
>
> with:
>
> if (something_bad)
> error (EXIT_FAILURE, 0, "error message");
>
> (except in a few cases were errno was incorrectly being ignored, in
> which case I have fixed that).
>
> It's slightly more complex than the previous commit because we must be
> careful to:
>
> - Remove the program name (since error(3) prints it).
>
> - Remove any trailing \n character from the message.
>
> Candidates for replacement were found using:
>
> pcregrep --buffer-size 10M -M '\bfprintf\b.*\n.*\bexit\b' `git ls-files`
> ---
Really nice improvement -- just a couple of notes.
> @@ -130,10 +131,8 @@ main (int argc, char *argv[])
> int r;
>
> g = guestfs_create ();
> - if (g == NULL) {
> - fprintf (stderr, _("guestfs_create: failed to create handle\n"));
> - exit (EXIT_FAILURE);
> - }
> + if (g == NULL)
> + error (EXIT_FAILURE, errno, "guestfs_create");
What about
error (EXIT_FAILURE, errno, _("failed to create handle"));
instead? Also for all the occurrences of this change, in public tools
only (i.e. not for tests, nor p2v).
Something I noticed while reading the changes is that some of the error
messages end with period, while it seems most of them don't. Should
all of them be without?
Thanks,
--
Pino Toscano
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