From 9404cc7f65217f205ef9bf994012d6f8ce4f4060 Mon Sep 17 00:00:00 2001 From: Francesco Cosoleto Date: Fri, 8 Apr 2011 15:51:50 +0200 Subject: elvtune, isosize: print usage text in case of invalid option Signed-off-by: Francesco Cosoleto --- disk-utils/isosize.c | 16 +++++++++++----- 1 file changed, 11 insertions(+), 5 deletions(-) (limited to 'disk-utils/isosize.c') 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 ] 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 ] iso9660-image\n"), - program_invocation_short_name); - exit(1); + usage(stderr); } for (j = optind; j < argc; j++) { -- cgit v1.2.3-55-g7522