Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1 | /* vi: set sw=4 ts=4: */ |
Eric Andersen | 8759006 | 1999-10-18 21:22:59 +0000 | [diff] [blame] | 2 | /* |
| 3 | * Mini swapon/swapoff implementation for busybox |
| 4 | * |
Eric Andersen | c499601 | 1999-10-20 22:08:37 +0000 | [diff] [blame] | 5 | * |
Erik Andersen | 61677fe | 2000-04-13 01:18:56 +0000 | [diff] [blame] | 6 | * Copyright (C) 1999,2000 by Lineo, inc. |
Eric Andersen | c499601 | 1999-10-20 22:08:37 +0000 | [diff] [blame] | 7 | * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org> |
Eric Andersen | 8759006 | 1999-10-18 21:22:59 +0000 | [diff] [blame] | 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 "internal.h" |
| 26 | #include <stdio.h> |
| 27 | #include <sys/mount.h> |
| 28 | #include <sys/swap.h> |
| 29 | #include <mntent.h> |
| 30 | #include <dirent.h> |
| 31 | #include <fstab.h> |
| 32 | #include <errno.h> |
| 33 | |
| 34 | |
| 35 | static int whichApp; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 36 | static const char *appName; |
Eric Andersen | 8759006 | 1999-10-18 21:22:59 +0000 | [diff] [blame] | 37 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 38 | static const char swapoff_usage[] = |
Erik Andersen | 7ab9c7e | 2000-05-12 19:41:47 +0000 | [diff] [blame] | 39 | "swapoff [OPTION] [device]\n" |
| 40 | #ifndef BB_FEATURE_TRIVIAL_HELP |
| 41 | "\nStop swapping virtual memory pages on the given device.\n\n" |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 42 | "Options:\n" |
Erik Andersen | 7ab9c7e | 2000-05-12 19:41:47 +0000 | [diff] [blame] | 43 | "\t-a\tStop swapping on all swap devices\n" |
| 44 | #endif |
| 45 | ; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 46 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 47 | static const char swapon_usage[] = |
Erik Andersen | 7ab9c7e | 2000-05-12 19:41:47 +0000 | [diff] [blame] | 48 | "swapon [OPTION] [device]\n" |
| 49 | #ifndef BB_FEATURE_TRIVIAL_HELP |
| 50 | "\nStart swapping virtual memory pages on the given device.\n\n" |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 51 | "Options:\n" |
Erik Andersen | 7ab9c7e | 2000-05-12 19:41:47 +0000 | [diff] [blame] | 52 | "\t-a\tStart swapping on all swap devices\n" |
| 53 | #endif |
| 54 | ; |
Eric Andersen | 8759006 | 1999-10-18 21:22:59 +0000 | [diff] [blame] | 55 | |
| 56 | |
| 57 | #define SWAPON_APP 1 |
| 58 | #define SWAPOFF_APP 2 |
| 59 | |
| 60 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 61 | static void swap_enable_disable(char *device) |
Eric Andersen | 8759006 | 1999-10-18 21:22:59 +0000 | [diff] [blame] | 62 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 63 | int status; |
Eric Andersen | 8759006 | 1999-10-18 21:22:59 +0000 | [diff] [blame] | 64 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 65 | if (whichApp == SWAPON_APP) |
| 66 | status = swapon(device, 0); |
| 67 | else |
| 68 | status = swapoff(device); |
| 69 | |
| 70 | if (status != 0) { |
| 71 | perror(appName); |
| 72 | exit(FALSE); |
| 73 | } |
Eric Andersen | 8759006 | 1999-10-18 21:22:59 +0000 | [diff] [blame] | 74 | } |
| 75 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 76 | static void do_em_all() |
Eric Andersen | 8759006 | 1999-10-18 21:22:59 +0000 | [diff] [blame] | 77 | { |
| 78 | struct mntent *m; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 79 | FILE *f = setmntent("/etc/fstab", "r"); |
Eric Andersen | 8759006 | 1999-10-18 21:22:59 +0000 | [diff] [blame] | 80 | |
| 81 | if (f == NULL) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 82 | perror("/etc/fstab"); |
| 83 | exit(FALSE); |
Eric Andersen | 8759006 | 1999-10-18 21:22:59 +0000 | [diff] [blame] | 84 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 85 | while ((m = getmntent(f)) != NULL) { |
Eric Andersen | a42982e | 2000-06-07 17:28:53 +0000 | [diff] [blame] | 86 | if (strcmp(m->mnt_type, MNTTYPE_SWAP)==0) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 87 | swap_enable_disable(m->mnt_fsname); |
| 88 | } |
Eric Andersen | 8759006 | 1999-10-18 21:22:59 +0000 | [diff] [blame] | 89 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 90 | endmntent(f); |
| 91 | exit(TRUE); |
Eric Andersen | 8759006 | 1999-10-18 21:22:59 +0000 | [diff] [blame] | 92 | } |
| 93 | |
| 94 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 95 | extern int swap_on_off_main(int argc, char **argv) |
Eric Andersen | 8759006 | 1999-10-18 21:22:59 +0000 | [diff] [blame] | 96 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 97 | if (strcmp(*argv, "swapon") == 0) { |
| 98 | appName = *argv; |
| 99 | whichApp = SWAPON_APP; |
Eric Andersen | 8759006 | 1999-10-18 21:22:59 +0000 | [diff] [blame] | 100 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 101 | } else { |
| 102 | appName = *argv; |
| 103 | whichApp = SWAPOFF_APP; |
Eric Andersen | 8759006 | 1999-10-18 21:22:59 +0000 | [diff] [blame] | 104 | } |
Eric Andersen | 8759006 | 1999-10-18 21:22:59 +0000 | [diff] [blame] | 105 | |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 106 | if (argc != 2) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 107 | goto usage_and_exit; |
Erik Andersen | e132f4b | 2000-02-09 04:16:43 +0000 | [diff] [blame] | 108 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 109 | argc--; |
| 110 | argv++; |
| 111 | |
| 112 | /* Parse any options */ |
| 113 | while (**argv == '-') { |
| 114 | while (*++(*argv)) |
| 115 | switch (**argv) { |
| 116 | case 'a': |
Erik Andersen | 3364d78 | 2000-03-28 00:58:14 +0000 | [diff] [blame] | 117 | { |
| 118 | struct stat statBuf; |
| 119 | |
| 120 | if (stat("/etc/fstab", &statBuf) < 0) |
| 121 | fatalError("/etc/fstab file missing\n"); |
| 122 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 123 | do_em_all(); |
| 124 | break; |
| 125 | default: |
| 126 | goto usage_and_exit; |
| 127 | } |
| 128 | } |
| 129 | swap_enable_disable(*argv); |
| 130 | exit(TRUE); |
| 131 | |
| 132 | usage_and_exit: |
| 133 | usage((whichApp == SWAPON_APP) ? swapon_usage : swapoff_usage); |
| 134 | exit(FALSE); |
Eric Andersen | 8759006 | 1999-10-18 21:22:59 +0000 | [diff] [blame] | 135 | } |