Paolo Bonzini writes:
> Use the location management facilities that the emulator uses, so that
> the current command line option appears in the error message.
>
> Before:
>
> $ storage-daemon/qemu-storage-daemon --nbd key..=
> qemu-storage-daemon: Invalid parameter 'key..'
>
> After:
>
> $ storage-daemon/qemu-storage-daemon --nbd key..=
> qemu-storage-daemon: --nbd key..=: Invalid parameter 'key..'
>
> Reviewed-by: Eric Blake
> Signed-off-by: Paolo Bonzini
I have a similar patch in an unfinished branch. You win :)
> ---
> storage-daemon/qemu-storage-daemon.c | 17 -
> 1 file changed, 16 insertions(+), 1 deletion(-)
>
> diff --git a/storage-daemon/qemu-storage-daemon.c
> b/storage-daemon/qemu-storage-daemon.c
> index 9aa82e7d96..78ddf619d4 100644
> --- a/storage-daemon/qemu-storage-daemon.c
> +++ b/storage-daemon/qemu-storage-daemon.c
> @@ -152,6 +152,20 @@ static void init_qmp_commands(void)
> qmp_marshal_qmp_capabilities, QCO_ALLOW_PRECONFIG);
> }
>
> +static int getopt_set_loc(int argc, char **argv, const char *optstring,
> + const struct option *longopts)
> +{
> +int c, save_index;
> +
> +optarg = NULL;
> +save_index = optind;
> +c = getopt_long(argc, argv, optstring, longopts, NULL);
> +if (optarg) {
> +loc_set_cmdline(argv, save_index, MAX(1, optind - save_index));
> +}
> +return c;
> +}
> +
I think this function is more widely applicable:
$ git-grep -l getopt_long | xargs grep -l error_report
qemu-img.c
qemu-io.c
qemu-nbd.c
scsi/qemu-pr-helper.c
storage-daemon/qemu-storage-daemon.c
> static void process_options(int argc, char *argv[])
> {
> int c;
> @@ -174,7 +188,7 @@ static void process_options(int argc, char *argv[])
> * they are given on the command lines. This means that things must be
> * defined first before they can be referenced in another option.
> */
> -while ((c = getopt_long(argc, argv, "-hT:V", long_options, NULL)) != -1)
> {
> +while ((c = getopt_set_loc(argc, argv, "-hT:V", long_options)) != -1) {
> switch (c) {
> case '?':
> exit(EXIT_FAILURE);
> @@ -275,12 +289,13 @@ static void process_options(int argc, char *argv[])
> break;
> }
> case 1:
> -error_report("Unexpected argument: %s", optarg);
> +error_report("Unexpected argument");
> exit(EXIT_FAILURE);
> default:
> g_assert_not_reached();
> }
> }
> +loc_set_none();
> }
>
> int main(int argc, char *argv[])
