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[821] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * Mini swapon/swapoff implementation for busybox
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| 4 | *
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| 5 | * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
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| 6 | *
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[1765] | 7 | * Licensed under the GPL version 2, see the file LICENSE in this tarball.
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[821] | 8 | */
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| 9 |
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[1765] | 10 | #include "libbb.h"
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[821] | 11 | #include <mntent.h>
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| 12 | #include <sys/swap.h>
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| 13 |
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[1765] | 14 | static int swap_enable_disable(char *device)
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[821] | 15 | {
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| 16 | int status;
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| 17 | struct stat st;
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| 18 |
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| 19 | xstat(device, &st);
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| 20 |
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[1765] | 21 | #if ENABLE_DESKTOP
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[821] | 22 | /* test for holes */
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| 23 | if (S_ISREG(st.st_mode))
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| 24 | if (st.st_blocks * 512 < st.st_size)
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[1765] | 25 | bb_error_msg("warning: swap file has holes");
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| 26 | #endif
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[821] | 27 |
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[1765] | 28 | if (applet_name[5] == 'n')
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[821] | 29 | status = swapon(device, 0);
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| 30 | else
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| 31 | status = swapoff(device);
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| 32 |
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| 33 | if (status != 0) {
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| 34 | bb_perror_msg("%s", device);
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| 35 | return 1;
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| 36 | }
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| 37 |
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| 38 | return 0;
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| 39 | }
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| 40 |
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| 41 | static int do_em_all(void)
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| 42 | {
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| 43 | struct mntent *m;
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| 44 | FILE *f;
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| 45 | int err;
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| 46 |
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| 47 | f = setmntent("/etc/fstab", "r");
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| 48 | if (f == NULL)
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| 49 | bb_perror_msg_and_die("/etc/fstab");
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| 50 |
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| 51 | err = 0;
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| 52 | while ((m = getmntent(f)) != NULL)
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| 53 | if (strcmp(m->mnt_type, MNTTYPE_SWAP) == 0)
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| 54 | err += swap_enable_disable(m->mnt_fsname);
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| 55 |
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| 56 | endmntent(f);
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| 57 |
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| 58 | return err;
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| 59 | }
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| 60 |
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[1765] | 61 | int swap_on_off_main(int argc, char **argv);
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[821] | 62 | int swap_on_off_main(int argc, char **argv)
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| 63 | {
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| 64 | int ret;
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| 65 |
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| 66 | if (argc == 1)
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| 67 | bb_show_usage();
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| 68 |
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[1765] | 69 | ret = getopt32(argv, "a");
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| 70 | if (ret)
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[821] | 71 | return do_em_all();
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| 72 |
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[1765] | 73 | /* ret = 0; redundant */
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[821] | 74 | while (*++argv)
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| 75 | ret += swap_enable_disable(*argv);
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| 76 | return ret;
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| 77 | }
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