ubase/swapon.c
Hiltjo Posthuma faa6fe28e2 swapon, swapoff: show usage with -a device
... and small cleanup.
2015-02-06 15:16:24 +00:00

68 lines
1.1 KiB
C

/* See LICENSE file for copyright and license details. */
#include <sys/swap.h>
#include <mntent.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "util.h"
static void
usage(void)
{
eprintf("usage: %s [-dp] -a | device\n", argv0);
}
int
main(int argc, char *argv[])
{
int i;
int ret = 0;
int flags = 0;
int all = 0;
struct mntent *me;
FILE *fp;
ARGBEGIN {
case 'a':
all = 1;
break;
case 'd':
flags |= SWAP_FLAG_DISCARD;
break;
case 'p':
flags |= SWAP_FLAG_PREFER;
break;
default:
usage();
} ARGEND;
if ((!all && argc < 1) || (all && argc > 0))
usage();
if (all) {
fp = setmntent("/etc/fstab", "r");
if (!fp)
eprintf("setmntent %s:", "/etc/fstab");
while ((me = getmntent(fp)) != NULL) {
if (strcmp(me->mnt_type, MNTTYPE_SWAP) == 0
&& (hasmntopt(me, MNTOPT_NOAUTO) == NULL)) {
if (swapon(me->mnt_fsname, flags) < 0) {
weprintf("swapon %s:", me->mnt_fsname);
ret = 1;
}
}
}
endmntent(fp);
} else {
for (i = 0; i < argc; i++) {
if (swapon(argv[i], flags) < 0) {
weprintf("swapon %s:", argv[i]);
ret = 1;
}
}
}
return ret;
}