diff options
| author | Francesco Cosoleto | 2011-04-08 15:51:50 +0200 |
|---|---|---|
| committer | Karel Zak | 2011-04-12 12:36:48 +0200 |
| commit | 9404cc7f65217f205ef9bf994012d6f8ce4f4060 (patch) | |
| tree | 54eb27f28819a089dcd4d7a6d74781cbcd395489 /disk-utils/isosize.c | |
| parent | isosize: use program_invocation_short_name (diff) | |
| download | kernel-qcow2-util-linux-9404cc7f65217f205ef9bf994012d6f8ce4f4060.tar.gz kernel-qcow2-util-linux-9404cc7f65217f205ef9bf994012d6f8ce4f4060.tar.xz kernel-qcow2-util-linux-9404cc7f65217f205ef9bf994012d6f8ce4f4060.zip | |
elvtune, isosize: print usage text in case of invalid option
Signed-off-by: Francesco Cosoleto <cosoleto@gmail.com>
Diffstat (limited to 'disk-utils/isosize.c')
| -rw-r--r-- | disk-utils/isosize.c | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/disk-utils/isosize.c b/disk-utils/isosize.c index cba107c82..7857a22a1 100644 --- a/disk-utils/isosize.c +++ b/disk-utils/isosize.c @@ -154,6 +154,14 @@ isosize(char *filenamep) { close(fd); } +static void __attribute__((__noreturn__)) usage(FILE *out) +{ + fprintf(out, _("Usage: %s [-x] [-d <num>] iso9660-image\n"), + program_invocation_short_name); + + exit(out == stderr ? EXIT_FAILURE : EXIT_SUCCESS); +} + int main(int argc, char * argv[]) { int j, ct; @@ -166,7 +174,7 @@ main(int argc, char * argv[]) { if (argc >= 2 && (!strcmp(argv[1], "-V") || !strcmp(argv[1], "--version"))) { printf(_("%s (%s)\n"), program_invocation_short_name, PACKAGE_STRING); - exit(0); + return EXIT_SUCCESS; } for (;;) { @@ -183,16 +191,14 @@ main(int argc, char * argv[]) { xflag = 1; break; default: - exit(1); + usage(stderr); } } ct = argc - optind; if (ct <= 0) { - fprintf(stderr, _("Usage: %s [-x] [-d <num>] iso9660-image\n"), - program_invocation_short_name); - exit(1); + usage(stderr); } for (j = optind; j < argc; j++) { |