diff options
| author | Meador Inge <meadori@codesourcery.com> | 2015-07-06 11:03:40 -0700 |
|---|---|---|
| committer | Riku Voipio <riku.voipio@linaro.org> | 2015-09-28 16:04:20 +0300 |
| commit | 138940bf08df1d8e9b862ad019a0d7d451e2413a (patch) | |
| tree | 61c5d0eccdf628b4704ca6fb42afae672f09e5a9 /linux-user/main.c | |
| parent | daaf8c8eb7135386134bc7075b9cf4dd57107c43 (diff) | |
linux-user: Add proper error messages for bad options
This patch adds better support for diagnosing option
parser errors. The previous implementation just printed
the usage text and exited when a bad option or argument
was found. This made it very difficult to determine why
the usage was being displayed and it was doubly confusing
for cases like '--help' (it wasn't clear that --help was
actually an error).
Signed-off-by: Meador Inge <meadori@codesourcery.com>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Diffstat (limited to 'linux-user/main.c')
| -rw-r--r-- | linux-user/main.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/linux-user/main.c b/linux-user/main.c index 58d8d8dff5..31aa4d98e4 100644 --- a/linux-user/main.c +++ b/linux-user/main.c @@ -4029,7 +4029,9 @@ static int parse_args(int argc, char **argv) if (!strcmp(r, arginfo->argv)) { if (arginfo->has_arg) { if (optind >= argc) { - usage(1); + (void) fprintf(stderr, + "qemu: missing argument for option '%s'\n", r); + exit(1); } arginfo->handle_opt(argv[optind]); optind++; @@ -4042,12 +4044,14 @@ static int parse_args(int argc, char **argv) /* no option matched the current argv */ if (arginfo->handle_opt == NULL) { - usage(1); + (void) fprintf(stderr, "qemu: unknown option '%s'\n", r); + exit(1); } } if (optind >= argc) { - usage(1); + (void) fprintf(stderr, "qemu: no user program specified\n"); + exit(1); } filename = argv[optind]; |