1 /* vi: set sw=4 ts=4: */
3 * Mini swapon/swapoff implementation for busybox
5 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
29 #include <sys/mount.h>
34 static int whichApp; /* default SWAPON_APP */
36 static const int SWAPON_APP = 0;
37 static const int SWAPOFF_APP = 1;
40 static int swap_enable_disable(const char *device)
45 if (stat(device, &st) < 0) {
46 bb_perror_msg_and_die("cannot stat %s", device);
50 if (S_ISREG(st.st_mode)) {
51 if (st.st_blocks * 512 < st.st_size) {
52 bb_error_msg_and_die("swap file has holes");
56 if (whichApp == SWAPON_APP)
57 status = swapon(device, 0);
59 status = swapoff(device);
62 bb_perror_msg("%s", device);
68 static int do_em_all(void)
71 FILE *f = setmntent("/etc/fstab", "r");
75 bb_perror_msg_and_die("/etc/fstab");
76 while ((m = getmntent(f)) != NULL) {
77 if (strcmp(m->mnt_type, MNTTYPE_SWAP)==0) {
78 if(swap_enable_disable(m->mnt_fsname) == EXIT_FAILURE)
87 extern int swap_on_off_main(int argc, char **argv)
89 if (bb_applet_name[5] == 'f') { /* "swapoff" */
90 whichApp = SWAPOFF_APP;
99 /* Parse any options */
100 while (**argv == '-') {
107 if (stat("/etc/fstab", &statBuf) < 0)
108 bb_error_msg_and_die("/etc/fstab file missing");
116 return swap_enable_disable(*argv);