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add basic --help

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This commit is contained in:
Mike Frysinger 2007-04-13 15:09:37 +00:00
parent bc91e51d43
commit 6dde29a0c9
1 changed files with 27 additions and 13 deletions
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40
src/mountinfo.c
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@ -128,6 +128,28 @@ static char **find_mounts (regex_t *node_regex, regex_t *fstype_regex,
# error "Operating system not supported!" # error "Operating system not supported!"
#endif #endif
#define getoptstring "F:N:S:fnrhV"
static struct option longopts[] = {
{ "fstype-regex", 1, NULL, 'F'},
{ "node-regex", 1, NULL, 'N'},
{ "skip-regex", 1, NULL, 'S'},
{ "fstype", 0, NULL, 'f'},
{ "node", 0, NULL, 'n'},
{ "reverse", 0, NULL, 'r'},
{ "help", 0, NULL, 'h'},
{ NULL, 0, NULL, 0}
};
static void usage (int exit_status)
{
int i;
printf ("Usage: mountinfo [options]\n\n");
printf ("Options:\n");
for (i = 0; longopts[i].name; ++i)
printf (" -%c, --%s\n", longopts[i].val, longopts[i].name);
exit (exit_status);
}
int main (int argc, char **argv) int main (int argc, char **argv)
{ {
int i; int i;
@ -144,17 +166,7 @@ int main (int argc, char **argv)
char **mounts = NULL; char **mounts = NULL;
char c; char c;
static struct option longopts[] = { while ((c = getopt_long (argc, argv, getoptstring,
{ "fstype-regex", 1, NULL, 'F'},
{ "node-regex", 1, NULL, 'N'},
{ "skip-regex", 1, NULL, 'S'},
{ "fstype", 0, NULL, 'f'},
{ "node", 0, NULL, 'n'},
{ "reverse", 0, NULL, 'r'},
{ NULL, 0, NULL, 0}
};
while ((c = getopt_long (argc, argv, "F:N:S:fnr",
longopts, (int *) 0)) != -1) longopts, (int *) 0)) != -1)
switch (c) { switch (c) {
case 'F': case 'F':
@ -207,8 +219,11 @@ int main (int argc, char **argv)
reverse = true; reverse = true;
break; break;
case 'h':
usage (EXIT_SUCCESS);
default: default:
exit (EXIT_FAILURE); usage (EXIT_FAILURE);
} }
while (optind < argc) { while (optind < argc) {
@ -241,4 +256,3 @@ int main (int argc, char **argv)
exit (result); exit (result);
} }