diff options
| -rw-r--r-- | text-utils/rev.c | 24 |
1 files changed, 19 insertions, 5 deletions
diff --git a/text-utils/rev.c b/text-utils/rev.c index 76a362030..6c1366d23 100644 --- a/text-utils/rev.c +++ b/text-utils/rev.c @@ -56,6 +56,7 @@ #include <string.h> #include <unistd.h> #include <signal.h> +#include <getopt.h> #include "nls.h" #include "xalloc.h" @@ -70,10 +71,14 @@ static void sig_handler(int signo) _exit(EXIT_SUCCESS); } -static void __attribute__((__noreturn__)) usage(FILE *out) +static void __attribute__ ((__noreturn__)) usage(FILE * out) { - fprintf(out, _("Usage: %s [file ...]\n"), - program_invocation_short_name); + fprintf(out, _("Usage: %s [options] [file ...]\n"), + program_invocation_short_name); + + fprintf(out, _("\nOptions:\n" + " -V, --version output version information and exit\n" + " -h, --help display this help and exit\n")); fprintf(out, _("\nFor more information see rev(1).\n")); @@ -95,9 +100,18 @@ int main(int argc, char *argv[]) signal(SIGINT, sig_handler); signal(SIGTERM, sig_handler); - while ((ch = getopt(argc, argv, "")) != -1) + static const struct option longopts[] = { + { "version", no_argument, 0, 'V' }, + { "help", no_argument, 0, 'h' }, + { NULL, 0, 0, 0 } + }; + + while ((ch = getopt_long(argc, argv, "Vh", longopts, NULL)) != -1) switch(ch) { - case '?': + case 'V': + printf(_("%s from %s\n"), program_invocation_short_name, + PACKAGE_STRING); + exit(EXIT_SUCCESS); case 'h': usage(stdout); default: |