1 /* vi: set sw=4 ts=4: */
3 * Mini swapon/swapoff implementation for busybox
6 * Copyright (C) 1999,2000 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>
32 _syscall2(int, swapon, const char *, path, int, flags);
33 _syscall1(int, swapoff, const char *, path);
37 static const char *appName;
39 static const char swapoff_usage[] =
40 "swapoff [OPTION] [device]\n"
41 #ifndef BB_FEATURE_TRIVIAL_HELP
42 "\nStop swapping virtual memory pages on the given device.\n\n"
44 "\t-a\tStop swapping on all swap devices\n"
48 static const char swapon_usage[] =
49 "swapon [OPTION] [device]\n"
50 #ifndef BB_FEATURE_TRIVIAL_HELP
51 "\nStart swapping virtual memory pages on the given device.\n\n"
53 "\t-a\tStart swapping on all swap devices\n"
62 static void swap_enable_disable(char *device)
66 if (whichApp == SWAPON_APP)
67 status = swapon(device, 0);
69 status = swapoff(device);
77 static void do_em_all()
80 FILE *f = setmntent("/etc/fstab", "r");
86 while ((m = getmntent(f)) != NULL) {
87 if (strcmp(m->mnt_type, MNTTYPE_SWAP)==0) {
88 swap_enable_disable(m->mnt_fsname);
96 extern int swap_on_off_main(int argc, char **argv)
98 if (strcmp(*argv, "swapon") == 0) {
100 whichApp = SWAPON_APP;
104 whichApp = SWAPOFF_APP;
113 /* Parse any options */
114 while (**argv == '-') {
121 if (stat("/etc/fstab", &statBuf) < 0)
122 fatalError("/etc/fstab file missing\n");
130 swap_enable_disable(*argv);
134 usage((whichApp == SWAPON_APP) ? swapon_usage : swapoff_usage);