/* vi: set sw=4 ts=4: */ /* * Mini swapon/swapoff implementation for busybox * * Copyright (C) 1999,2000 by Lineo, inc. and Erik Andersen * Copyright (C) 1999,2000,2001 by Erik Andersen <andersee@debian.org> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * */ #include <stdio.h> #include <mntent.h> #include <dirent.h> #include <errno.h> #include <string.h> #include <stdlib.h> #include <sys/mount.h> #if __GNU_LIBRARY__ < 5 /* libc5 doesn't have sys/swap.h, define these here. */ extern int swapon (__const char *__path, int __flags); extern int swapoff (__const char *__path); #else #include <sys/swap.h> #endif #include "busybox.h" static int whichApp; static const int SWAPON_APP = 1; static const int SWAPOFF_APP = 2; static void swap_enable_disable(char *device) { int status; if (whichApp == SWAPON_APP) status = swapon(device, 0); else status = swapoff(device); if (status != 0) perror_msg_and_die(applet_name); } static void do_em_all(void) { struct mntent *m; FILE *f = setmntent("/etc/fstab", "r"); if (f == NULL) perror_msg_and_die("/etc/fstab"); while ((m = getmntent(f)) != NULL) { if (strcmp(m->mnt_type, MNTTYPE_SWAP)==0) { swap_enable_disable(m->mnt_fsname); } } endmntent(f); exit(EXIT_SUCCESS); } extern int swap_on_off_main(int argc, char **argv) { if (strcmp(applet_name, "swapon") == 0) { whichApp = SWAPON_APP; } else { whichApp = SWAPOFF_APP; } if (argc != 2) { goto usage_and_exit; } argc--; argv++; /* Parse any options */ while (**argv == '-') { while (*++(*argv)) switch (**argv) { case 'a': { struct stat statBuf; if (stat("/etc/fstab", &statBuf) < 0) error_msg_and_die("/etc/fstab file missing"); } do_em_all(); break; default: goto usage_and_exit; } } swap_enable_disable(*argv); return EXIT_SUCCESS; usage_and_exit: show_usage(); }