/* vi: set sw=4 ts=4: */ /* * Mini swapon/swapoff implementation for busybox * * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org> * * Licensed under the GPL version 2, see the file LICENSE in this tarball. */ #include "busybox.h" #include <mntent.h> #include <sys/swap.h> static int swap_enable_disable(char *device) { int status; struct stat st; xstat(device, &st); #if ENABLE_DESKTOP /* test for holes */ if (S_ISREG(st.st_mode)) if (st.st_blocks * 512 < st.st_size) bb_error_msg("warning: swap file has holes"); #endif if (applet_name[5] == 'n') status = swapon(device, 0); else status = swapoff(device); if (status != 0) { bb_perror_msg("%s", device); return 1; } return 0; } static int do_em_all(void) { struct mntent *m; FILE *f; int err; f = setmntent("/etc/fstab", "r"); if (f == NULL) bb_perror_msg_and_die("/etc/fstab"); err = 0; while ((m = getmntent(f)) != NULL) if (strcmp(m->mnt_type, MNTTYPE_SWAP) == 0) err += swap_enable_disable(m->mnt_fsname); endmntent(f); return err; } int swap_on_off_main(int argc, char **argv); int swap_on_off_main(int argc, char **argv) { int ret; if (argc == 1) bb_show_usage(); ret = getopt32(argc, argv, "a"); if (ret) return do_em_all(); /* ret = 0; redundant */ while (*++argv) ret += swap_enable_disable(*argv); return ret; }