1 /* vi: set sw=4 ts=4: */
3 * Mini swapon/swapoff implementation for busybox
6 * Copyright (C) 1999 by Lineo, inc.
7 * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
27 #include <sys/mount.h>
36 static const char *appName;
38 static const char swapoff_usage[] =
41 "\nStop swapping virtual memory pages on the given device.\n";
42 static const char swapon_usage[] =
45 "\nStart swapping virtual memory pages on the given device.\n";
52 static void swap_enable_disable(char *device)
56 if (whichApp == SWAPON_APP)
57 status = swapon(device, 0);
59 status = swapoff(device);
67 static void do_em_all()
70 FILE *f = setmntent("/etc/fstab", "r");
76 while ((m = getmntent(f)) != NULL) {
77 if (!strstr(m->mnt_type, MNTTYPE_SWAP)) {
78 swap_enable_disable(m->mnt_fsname);
86 extern int swap_on_off_main(int argc, char **argv)
90 if (stat("/etc/fstab", &statBuf) < 0)
92 "/etc/fstab file missing -- Please install one.\n\n");
94 if (strcmp(*argv, "swapon") == 0) {
96 whichApp = SWAPON_APP;
100 whichApp = SWAPOFF_APP;
108 /* Parse any options */
109 while (**argv == '-') {
119 swap_enable_disable(*argv);
123 usage((whichApp == SWAPON_APP) ? swapon_usage : swapoff_usage);