ubase/swapon.c

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