1/* vi: set sw=4 ts=4: */ 2/* 3 * Mini swapon/swapoff implementation for busybox 4 * 5 * 6 * Copyright (C) 1999,2000,2001 by Lineo, inc. 7 * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org> 8 * 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 25#include <stdio.h> 26#include <mntent.h> 27#include <dirent.h> 28#include <errno.h> 29#include <string.h> 30#include <stdlib.h> 31#include <sys/mount.h> 32 33#if __GNU_LIBRARY__ < 5 34/* libc5 doesn't have sys/swap.h, define these here. */ 35extern int swapon (__const char *__path, int __flags); 36extern int swapoff (__const char *__path); 37#else 38#include <sys/swap.h> 39#endif 40 41#include "busybox.h" 42 43static int whichApp; 44 45static const int SWAPON_APP = 1; 46static const int SWAPOFF_APP = 2; 47 48 49static void swap_enable_disable(char *device) 50{ 51 int status; 52 53 if (whichApp == SWAPON_APP) 54 status = swapon(device, 0); 55 else 56 status = swapoff(device); 57 58 if (status != 0) 59 perror_msg_and_die(applet_name); 60} 61 62static void do_em_all() 63{ 64 struct mntent *m; 65 FILE *f = setmntent("/etc/fstab", "r"); 66 67 if (f == NULL) 68 perror_msg_and_die("/etc/fstab"); 69 while ((m = getmntent(f)) != NULL) { 70 if (strcmp(m->mnt_type, MNTTYPE_SWAP)==0) { 71 swap_enable_disable(m->mnt_fsname); 72 } 73 } 74 endmntent(f); 75 exit(EXIT_SUCCESS); 76} 77 78 79extern int swap_on_off_main(int argc, char **argv) 80{ 81 if (strcmp(applet_name, "swapon") == 0) { 82 whichApp = SWAPON_APP; 83 } else { 84 whichApp = SWAPOFF_APP; 85 } 86 87 if (argc != 2) { 88 goto usage_and_exit; 89 } 90 argc--; 91 argv++; 92 93 /* Parse any options */ 94 while (**argv == '-') { 95 while (*++(*argv)) 96 switch (**argv) { 97 case 'a': 98 { 99 struct stat statBuf; 100 101 if (stat("/etc/fstab", &statBuf) < 0) 102 error_msg_and_die("/etc/fstab file missing"); 103 } 104 do_em_all(); 105 break; 106 default: 107 goto usage_and_exit; 108 } 109 } 110 swap_enable_disable(*argv); 111 return EXIT_SUCCESS; 112 113 usage_and_exit: 114 show_usage(); 115} 116