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Erik Andersene49d5ec2000-02-08 19:58:47 +00001/* vi: set sw=4 ts=4: */
Eric Andersen87590061999-10-18 21:22:59 +00002/*
3 * Mini swapon/swapoff implementation for busybox
4 *
Eric Andersenc4996011999-10-20 22:08:37 +00005 *
Erik Andersen61677fe2000-04-13 01:18:56 +00006 * Copyright (C) 1999,2000 by Lineo, inc.
Eric Andersenc4996011999-10-20 22:08:37 +00007 * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
Eric Andersen87590061999-10-18 21:22:59 +00008 *
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.
13 *
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.
18 *
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
22 *
23 */
24
Eric Andersen3570a342000-09-25 21:45:58 +000025#include "busybox.h"
Eric Andersen87590061999-10-18 21:22:59 +000026#include <stdio.h>
Eric Andersen87590061999-10-18 21:22:59 +000027#include <mntent.h>
28#include <dirent.h>
Eric Andersen87590061999-10-18 21:22:59 +000029#include <errno.h>
Eric Andersened3ef502001-01-27 08:24:39 +000030#include <stdlib.h>
31#include <sys/mount.h>
32#include <sys/syscall.h>
33#include <linux/unistd.h>
Eric Andersen5e29c6f2000-06-19 18:25:49 +000034
35_syscall2(int, swapon, const char *, path, int, flags);
36_syscall1(int, swapoff, const char *, path);
Eric Andersen87590061999-10-18 21:22:59 +000037
38
39static int whichApp;
Eric Andersen87590061999-10-18 21:22:59 +000040
Mark Whitley59ab0252001-01-23 22:30:04 +000041static const int SWAPON_APP = 1;
42static const int SWAPOFF_APP = 2;
Eric Andersen87590061999-10-18 21:22:59 +000043
44
Erik Andersene49d5ec2000-02-08 19:58:47 +000045static void swap_enable_disable(char *device)
Eric Andersen87590061999-10-18 21:22:59 +000046{
Erik Andersene49d5ec2000-02-08 19:58:47 +000047 int status;
Eric Andersen87590061999-10-18 21:22:59 +000048
Erik Andersene49d5ec2000-02-08 19:58:47 +000049 if (whichApp == SWAPON_APP)
50 status = swapon(device, 0);
51 else
52 status = swapoff(device);
53
Matt Kraaia9819b22000-12-22 01:48:07 +000054 if (status != 0)
55 perror_msg_and_die(applet_name);
Eric Andersen87590061999-10-18 21:22:59 +000056}
57
Erik Andersene49d5ec2000-02-08 19:58:47 +000058static void do_em_all()
Eric Andersen87590061999-10-18 21:22:59 +000059{
60 struct mntent *m;
Erik Andersene49d5ec2000-02-08 19:58:47 +000061 FILE *f = setmntent("/etc/fstab", "r");
Eric Andersen87590061999-10-18 21:22:59 +000062
Matt Kraaia9819b22000-12-22 01:48:07 +000063 if (f == NULL)
64 perror_msg_and_die("/etc/fstab");
Erik Andersene49d5ec2000-02-08 19:58:47 +000065 while ((m = getmntent(f)) != NULL) {
Eric Andersena42982e2000-06-07 17:28:53 +000066 if (strcmp(m->mnt_type, MNTTYPE_SWAP)==0) {
Erik Andersene49d5ec2000-02-08 19:58:47 +000067 swap_enable_disable(m->mnt_fsname);
68 }
Eric Andersen87590061999-10-18 21:22:59 +000069 }
Erik Andersene49d5ec2000-02-08 19:58:47 +000070 endmntent(f);
Matt Kraai3e856ce2000-12-01 02:55:13 +000071 exit(EXIT_SUCCESS);
Eric Andersen87590061999-10-18 21:22:59 +000072}
73
74
Erik Andersene49d5ec2000-02-08 19:58:47 +000075extern int swap_on_off_main(int argc, char **argv)
Eric Andersen87590061999-10-18 21:22:59 +000076{
Matt Kraaie58771e2000-07-12 15:38:49 +000077 if (strcmp(applet_name, "swapon") == 0) {
Erik Andersene49d5ec2000-02-08 19:58:47 +000078 whichApp = SWAPON_APP;
Erik Andersene49d5ec2000-02-08 19:58:47 +000079 } else {
Erik Andersene49d5ec2000-02-08 19:58:47 +000080 whichApp = SWAPOFF_APP;
Eric Andersen87590061999-10-18 21:22:59 +000081 }
Eric Andersen87590061999-10-18 21:22:59 +000082
Erik Andersene132f4b2000-02-09 04:16:43 +000083 if (argc != 2) {
Erik Andersene49d5ec2000-02-08 19:58:47 +000084 goto usage_and_exit;
Erik Andersene132f4b2000-02-09 04:16:43 +000085 }
Erik Andersene49d5ec2000-02-08 19:58:47 +000086 argc--;
87 argv++;
88
89 /* Parse any options */
90 while (**argv == '-') {
91 while (*++(*argv))
92 switch (**argv) {
93 case 'a':
Erik Andersen3364d782000-03-28 00:58:14 +000094 {
95 struct stat statBuf;
96
97 if (stat("/etc/fstab", &statBuf) < 0)
Mark Whitleyf57c9442000-12-07 19:56:48 +000098 error_msg_and_die("/etc/fstab file missing\n");
Erik Andersen3364d782000-03-28 00:58:14 +000099 }
Erik Andersene49d5ec2000-02-08 19:58:47 +0000100 do_em_all();
101 break;
102 default:
103 goto usage_and_exit;
104 }
105 }
106 swap_enable_disable(*argv);
Matt Kraai3e856ce2000-12-01 02:55:13 +0000107 return EXIT_SUCCESS;
Erik Andersene49d5ec2000-02-08 19:58:47 +0000108
109 usage_and_exit:
110 usage((whichApp == SWAPON_APP) ? swapon_usage : swapoff_usage);
Eric Andersen87590061999-10-18 21:22:59 +0000111}