From: Antonio Ospite Date: Sun, 26 May 2013 22:05:00 +0000 (+0200) Subject: examples: print the usage message when a required option is missing X-Git-Tag: v0.1.4~30 X-Git-Url: https://git.ao2.it/libam7xxx.git/commitdiff_plain/74c1a41d0765df9716732ac053df9ed7f24f38f0 examples: print the usage message when a required option is missing While at it specify which option is missing when picoproj fails.. --- diff --git a/examples/am7xxx-play.c b/examples/am7xxx-play.c index 38812a4..e958eee 100644 --- a/examples/am7xxx-play.c +++ b/examples/am7xxx-play.c @@ -777,7 +777,8 @@ int main(int argc, char *argv[]) } if (input_path == NULL) { - fprintf(stderr, "The -i option must always be passed\n"); + fprintf(stderr, "The -i option must always be passed\n\n"); + usage(argv[0]); ret = -EINVAL; goto out; } diff --git a/examples/picoproj.c b/examples/picoproj.c index 8341527..610e148 100644 --- a/examples/picoproj.c +++ b/examples/picoproj.c @@ -168,7 +168,8 @@ int main(int argc, char *argv[]) } if (filename[0] == '\0') { - fprintf(stderr, "An image file MUST be specified.\n"); + fprintf(stderr, "An image file MUST be specified with the -f option.\n\n"); + usage(argv[0]); exit_code = EXIT_FAILURE; goto out; }