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	swapon.c - ubase - suckless linux base utils
	git clone git://git.suckless.org/ubase
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	swapon.c (1145B)
	---
	1 /* See LICENSE file for copyright and license details. */
	2 #include <sys/swap.h>
	3
	4 #include <mntent.h>
	5 #include <stdio.h>
	6 #include <stdlib.h>
	7 #include <string.h>
	8
	9 #include "util.h"
	10
	11 static void
	12 usage(void)
	13 {
	14 eprintf("usage: %s [-dp] -a \| device\n", argv0);
	15 }
	16
	17 int
	18 main(int argc, char *argv[])
	19 {
	20 int i;
	21 int ret = 0;
	22 int flags = 0;
	23 int all = 0;
	24 struct mntent *me;
	25 FILE *fp;
	26
	27 ARGBEGIN {
	28 case 'a':
	29 all = 1;
	30 break;
	31 case 'd':
	32 flags \|= SWAP_FLAG_DISCARD;
	33 break;
	34 case 'p':
	35 flags \|= SWAP_FLAG_PREFER;
	36 break;
	37 default:
	38 usage();
	39 } ARGEND;
	40
	41 if ((!all && argc < 1) \|\| (all && argc > 0))
	42 usage();
	43
	44 if (all) {
	45 fp = setmntent("/etc/fstab", "r");
	46 if (!fp)
	47 eprintf("setmntent %s:", "/etc/fstab");
	48 while ((me = getmntent(fp)) != NULL) {
	49 if (strcmp(me->mnt_type, MNTTYPE_SWAP) == 0
	50 && (hasmntopt(me, MNTOPT_NOAUTO) == NULL)) {
	51 if (swapon(me->mnt_fsname, flags) < 0) {
	52 weprintf("swapon %s:", me->mnt_f…
	53 ret = 1;
	54 }
	55 }
	56 }
	57 endmntent(fp);
	58 } else {
	59 for (i = 0; i < argc; i++) {
	60 if (swapon(argv[i], flags) < 0) {
	61 weprintf("swapon %s:", argv[i]);
	62 ret = 1;
	63 }
	64 }
	65 }
	66 return ret;
	67 }