1 /* vi: set sw=4 ts=4: */
3 * Mini swapon/swapoff implementation for busybox
5 * Copyright (C) 1999,2000 by Lineo, inc. and Erik Andersen
6 * Copyright (C) 1999,2000,2001 by Erik Andersen <andersee@debian.org>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
30 #include <sys/mount.h>
32 #if __GNU_LIBRARY__ < 5
33 /* libc5 doesn't have sys/swap.h, define these here. */
34 extern int swapon (__const char *__path, int __flags);
35 extern int swapoff (__const char *__path);
42 static int whichApp; /* default SWAPON_APP */
44 static const int SWAPON_APP = 0;
45 static const int SWAPOFF_APP = 1;
48 static int swap_enable_disable(const char *device)
53 if (stat(device, &st) < 0) {
54 bb_perror_msg_and_die("cannot stat %s", device);
58 if (S_ISREG(st.st_mode)) {
59 if (st.st_blocks * 512 < st.st_size) {
60 bb_error_msg_and_die("swap file has holes");
64 if (whichApp == SWAPON_APP)
65 status = swapon(device, 0);
67 status = swapoff(device);
70 bb_perror_msg("%s", device);
76 static int do_em_all(void)
79 FILE *f = setmntent("/etc/fstab", "r");
83 bb_perror_msg_and_die("/etc/fstab");
84 while ((m = getmntent(f)) != NULL) {
85 if (strcmp(m->mnt_type, MNTTYPE_SWAP)==0) {
86 if(swap_enable_disable(m->mnt_fsname) == EXIT_FAILURE)
95 extern int swap_on_off_main(int argc, char **argv)
97 if (bb_applet_name[5] == 'f') { /* "swapoff" */
98 whichApp = SWAPOFF_APP;
107 /* Parse any options */
108 while (**argv == '-') {
115 if (stat("/etc/fstab", &statBuf) < 0)
116 bb_error_msg_and_die("/etc/fstab file missing");
124 return swap_enable_disable(*argv);