diff options
Diffstat (limited to 'tools/nettle-pbkdf2.c')
| -rw-r--r-- | tools/nettle-pbkdf2.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/tools/nettle-pbkdf2.c b/tools/nettle-pbkdf2.c index b4e74a26..16040c38 100644 --- a/tools/nettle-pbkdf2.c +++ b/tools/nettle-pbkdf2.c @@ -51,7 +51,7 @@ static void usage (FILE *f) { - fprintf(f, "nettle-pbkdf2 [OPTIONS] SALT\n" + fprintf(f, "Usage: nettle-pbkdf2 [OPTIONS] SALT\n" "Options:\n" " --help Show this help.\n" " -V, --version Show version information.\n" @@ -97,6 +97,9 @@ main (int argc, char **argv) { default: abort(); + case '?': + usage (stderr); + return EXIT_FAILURE; case OPT_HELP: usage (stdout); return EXIT_SUCCESS; |