diff options
Diffstat (limited to 'src/dirname.c')
| -rw-r--r-- | src/dirname.c | 56 |
1 files changed, 51 insertions, 5 deletions
diff --git a/src/dirname.c b/src/dirname.c index 05612353a..d6227db2f 100644 --- a/src/dirname.c +++ b/src/dirname.c @@ -19,10 +19,36 @@ #include <stdio.h> #include <sys/types.h> +#include <getopt.h> + +#include "version.h" #include "system.h" void strip_trailing_slashes (); +/* The name this program was run with. */ +char *program_name; + +/* If non-zero, display usage information and exit. */ +static int show_help; + +/* If non-zero, print the version on standard error. */ +static int show_version; + +static struct option const long_options[] = +{ + {"help", no_argument, &show_help, 1}, + {"version", no_argument, &show_version, 1}, + {0, 0, 0, 0} +}; + +static void +usage () +{ + fprintf (stderr, "Usage: %s [{--help,--version}] path\n", program_name); + exit (1); +} + void main (argc, argv) int argc; @@ -30,14 +56,35 @@ main (argc, argv) { register char *path; register char *slash; + int c; - if (argc != 2) + program_name = argv[0]; + + while ((c = getopt_long (argc, argv, "", long_options, (int *) 0)) != EOF) + { + switch (c) + { + case 0: + break; + + default: + usage (); + } + } + + if (show_version) { - fprintf (stderr, "Usage: %s path\n", argv[0]); - exit (1); + printf ("%s\n", version_string); + exit (0); } - path = argv[1]; + if (show_help) + usage (); + + if (argc - optind != 1) + usage (); + + path = argv[optind]; strip_trailing_slashes (path); slash = rindex (path, '/'); @@ -54,4 +101,3 @@ main (argc, argv) exit (0); } - |