1 /* vi: set sw=4 ts=4: */
3 * Mini swapon/swapoff implementation for busybox
5 * Copyright (C) 1999-2003 by Erik Andersen <andersen@codepoet.org>
6 * Copyright (C) 1999-2003 by Erik Andersen <andersen@codepoet.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>
35 static int whichApp; /* default SWAPON_APP */
37 static const int SWAPON_APP = 0;
38 static const int SWAPOFF_APP = 1;
41 static int swap_enable_disable(const char *device)
46 if (stat(device, &st) < 0) {
47 bb_perror_msg_and_die("cannot stat %s", device);
51 if (S_ISREG(st.st_mode)) {
52 if (st.st_blocks * 512 < st.st_size) {
53 bb_error_msg_and_die("swap file has holes");
57 if (whichApp == SWAPON_APP)
58 status = swapon(device, 0);
60 status = swapoff(device);
63 bb_perror_msg("%s", device);
69 static int do_em_all(void)
72 FILE *f = setmntent("/etc/fstab", "r");
76 bb_perror_msg_and_die("/etc/fstab");
77 while ((m = getmntent(f)) != NULL) {
78 if (strcmp(m->mnt_type, MNTTYPE_SWAP)==0) {
79 if(swap_enable_disable(m->mnt_fsname) == EXIT_FAILURE)
88 extern int swap_on_off_main(int argc, char **argv)
90 if (bb_applet_name[5] == 'f') { /* "swapoff" */
91 whichApp = SWAPOFF_APP;
100 /* Parse any options */
101 while (**argv == '-') {
108 if (stat("/etc/fstab", &statBuf) < 0)
109 bb_error_msg_and_die("/etc/fstab file missing");
117 return swap_enable_disable(*argv);