Contents of /trunk/mkinitrd-magellan/busybox/util-linux/swaponoff.c
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Sat Sep 1 22:45:15 2007 UTC (17 years ago) by niro
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Sat Sep 1 22:45:15 2007 UTC (17 years ago) by niro
File MIME type: text/plain
File size: 1310 byte(s)
-import if magellan mkinitrd; it is a fork of redhats mkinitrd-5.0.8 with all magellan patches and features; deprecates magellan-src/mkinitrd
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * Mini swapon/swapoff implementation for busybox |
4 | * |
5 | * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org> |
6 | * |
7 | * Licensed under the GPL version 2, see the file LICENSE in this tarball. |
8 | */ |
9 | |
10 | #include "busybox.h" |
11 | #include <mntent.h> |
12 | #include <sys/swap.h> |
13 | |
14 | |
15 | static int swap_enable_disable(char *device) |
16 | { |
17 | int status; |
18 | struct stat st; |
19 | |
20 | xstat(device, &st); |
21 | |
22 | /* test for holes */ |
23 | if (S_ISREG(st.st_mode)) |
24 | if (st.st_blocks * 512 < st.st_size) |
25 | bb_error_msg_and_die("swap file has holes"); |
26 | |
27 | if (applet_name[5] == 'n') |
28 | status = swapon(device, 0); |
29 | else |
30 | status = swapoff(device); |
31 | |
32 | if (status != 0) { |
33 | bb_perror_msg("%s", device); |
34 | return 1; |
35 | } |
36 | |
37 | return 0; |
38 | } |
39 | |
40 | static int do_em_all(void) |
41 | { |
42 | struct mntent *m; |
43 | FILE *f; |
44 | int err; |
45 | |
46 | f = setmntent("/etc/fstab", "r"); |
47 | if (f == NULL) |
48 | bb_perror_msg_and_die("/etc/fstab"); |
49 | |
50 | err = 0; |
51 | while ((m = getmntent(f)) != NULL) |
52 | if (strcmp(m->mnt_type, MNTTYPE_SWAP) == 0) |
53 | err += swap_enable_disable(m->mnt_fsname); |
54 | |
55 | endmntent(f); |
56 | |
57 | return err; |
58 | } |
59 | |
60 | #define DO_ALL 0x01 |
61 | |
62 | int swap_on_off_main(int argc, char **argv) |
63 | { |
64 | int ret; |
65 | |
66 | if (argc == 1) |
67 | bb_show_usage(); |
68 | |
69 | ret = getopt32(argc, argv, "a"); |
70 | if (ret & DO_ALL) |
71 | return do_em_all(); |
72 | |
73 | ret = 0; |
74 | while (*++argv) |
75 | ret += swap_enable_disable(*argv); |
76 | return ret; |
77 | } |