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6cf8d46c KZ |
1 | #include <stdlib.h> |
2 | #include <stdio.h> | |
3 | #include <getopt.h> | |
4 | #include <string.h> | |
5 | #include <mntent.h> | |
6 | #include <errno.h> | |
7 | #include <sys/stat.h> | |
8 | #include <unistd.h> | |
9 | #include <sys/types.h> | |
10 | #include <sys/wait.h> | |
11 | #include <fcntl.h> | |
12 | #include <stdint.h> | |
13 | #include <ctype.h> | |
14 | ||
15 | #ifdef HAVE_SYS_SWAP_H | |
16 | # include <sys/swap.h> | |
17 | #endif | |
18 | ||
19 | #include "nls.h" | |
20 | #include "c.h" | |
21 | #include "closestream.h" | |
22 | ||
23 | #include "swapon-common.h" | |
24 | ||
25 | #ifndef SWAPON_HAS_TWO_ARGS | |
26 | /* libc is insane, let's call the kernel */ | |
27 | # include <sys/syscall.h> | |
28 | # define swapoff(path) syscall(SYS_swapoff, path) | |
29 | #endif | |
30 | ||
31 | static int verbose; | |
32 | static int all; | |
33 | ||
34 | #define QUIET 1 | |
35 | #define CANONIC 1 | |
36 | ||
37 | static int do_swapoff(const char *orig_special, int quiet, int canonic) | |
38 | { | |
39 | const char *special = orig_special; | |
40 | ||
41 | if (verbose) | |
e7b63bea | 42 | printf(_("swapoff %s\n"), orig_special); |
6cf8d46c KZ |
43 | |
44 | if (!canonic) { | |
45 | special = mnt_resolve_spec(orig_special, mntcache); | |
46 | if (!special) | |
47 | return cannot_find(orig_special); | |
48 | } | |
49 | ||
50 | if (swapoff(special) == 0) | |
51 | return 0; /* success */ | |
52 | ||
53 | if (errno == EPERM) | |
54 | errx(EXIT_FAILURE, _("Not superuser.")); | |
55 | ||
56 | if (!quiet || errno == ENOMEM) | |
57 | warn(_("%s: swapoff failed"), orig_special); | |
58 | ||
59 | return -1; | |
60 | } | |
61 | ||
62 | static int swapoff_by_label(const char *label, int quiet) | |
63 | { | |
64 | const char *special = mnt_resolve_tag("LABEL", label, mntcache); | |
65 | return special ? do_swapoff(special, quiet, CANONIC) : cannot_find(label); | |
66 | } | |
67 | ||
68 | static int swapoff_by_uuid(const char *uuid, int quiet) | |
69 | { | |
70 | const char *special = mnt_resolve_tag("UUID", uuid, mntcache); | |
71 | return special ? do_swapoff(special, quiet, CANONIC) : cannot_find(uuid); | |
72 | } | |
73 | ||
74 | static void usage(FILE *out, int n) | |
75 | { | |
76 | fputs(_("\nUsage:\n"), out); | |
77 | fprintf(out, _(" %s [options] [<spec>]\n"), program_invocation_short_name); | |
78 | ||
79 | fputs(_("\nOptions:\n"), out); | |
80 | fputs(_(" -a, --all disable all swaps from /proc/swaps\n" | |
81 | " -h, --help display help and exit\n" | |
82 | " -v, --verbose verbose mode\n" | |
83 | " -V, --version display version and exit\n"), out); | |
84 | ||
85 | fputs(_("\nThe <spec> parameter:\n" \ | |
86 | " -L <label> LABEL of device to be used\n" \ | |
87 | " -U <uuid> UUID of device to be used\n" \ | |
88 | " LABEL=<label> LABEL of device to be used\n" \ | |
89 | " UUID=<uuid> UUID of device to be used\n" \ | |
90 | " <device> name of device to be used\n" \ | |
91 | " <file> name of file to be used\n\n"), out); | |
92 | exit(n); | |
93 | } | |
94 | ||
e7b63bea KZ |
95 | static int swapoff_all(void) |
96 | { | |
97 | int status = 0; | |
98 | struct libmnt_table *tb; | |
99 | struct libmnt_fs *fs; | |
100 | struct libmnt_iter *itr = mnt_new_iter(MNT_ITER_BACKWARD); | |
101 | ||
102 | if (!itr) | |
103 | err(EXIT_FAILURE, _("failed to initialize libmount iterator")); | |
104 | ||
105 | /* | |
106 | * In case /proc/swaps exists, unswap stuff listed there. We are quiet | |
107 | * but report errors in status. Errors might mean that /proc/swaps | |
108 | * exists as ordinary file, not in procfs. do_swapoff() exits | |
109 | * immediately on EPERM. | |
110 | */ | |
111 | tb = get_swaps(); | |
112 | ||
113 | while (tb && mnt_table_find_next_fs(tb, itr, match_swap, NULL, &fs) == 0) | |
114 | status |= do_swapoff(mnt_fs_get_source(fs), QUIET, CANONIC); | |
115 | ||
116 | /* | |
117 | * Unswap stuff mentioned in /etc/fstab. Probably it was unmounted | |
118 | * already, so errors are not bad. Doing swapoff -a twice should not | |
119 | * give error messages. | |
120 | */ | |
121 | tb = get_fstab(); | |
122 | mnt_reset_iter(itr, MNT_ITER_FORWARD); | |
123 | ||
124 | while (tb && mnt_table_find_next_fs(tb, itr, match_swap, NULL, &fs) == 0) { | |
125 | if (!is_active_swap(mnt_fs_get_source(fs))) | |
126 | do_swapoff(mnt_fs_get_source(fs), QUIET, !CANONIC); | |
127 | } | |
128 | ||
129 | mnt_free_iter(itr); | |
130 | return status; | |
131 | } | |
6cf8d46c KZ |
132 | |
133 | int main(int argc, char *argv[]) | |
134 | { | |
6cf8d46c KZ |
135 | int status = 0, c; |
136 | size_t i; | |
137 | ||
138 | static const struct option long_opts[] = { | |
139 | { "all", 0, 0, 'a' }, | |
140 | { "help", 0, 0, 'h' }, | |
141 | { "verbose", 0, 0, 'v' }, | |
142 | { "version", 0, 0, 'V' }, | |
143 | { NULL, 0, 0, 0 } | |
144 | }; | |
145 | ||
146 | setlocale(LC_ALL, ""); | |
147 | bindtextdomain(PACKAGE, LOCALEDIR); | |
148 | textdomain(PACKAGE); | |
149 | atexit(close_stdout); | |
150 | ||
151 | while ((c = getopt_long(argc, argv, "ahvVL:U:", | |
152 | long_opts, NULL)) != -1) { | |
153 | switch (c) { | |
154 | case 'a': /* all */ | |
155 | ++all; | |
156 | break; | |
157 | case 'h': /* help */ | |
158 | usage(stdout, 0); | |
159 | break; | |
160 | case 'v': /* be chatty */ | |
161 | ++verbose; | |
162 | break; | |
163 | case 'V': /* version */ | |
164 | printf(UTIL_LINUX_VERSION); | |
165 | return EXIT_SUCCESS; | |
166 | case 'L': | |
167 | add_label(optarg); | |
168 | break; | |
169 | case 'U': | |
170 | add_uuid(optarg); | |
171 | break; | |
172 | case 0: | |
173 | break; | |
174 | case '?': | |
175 | default: | |
176 | usage(stderr, 1); | |
177 | } | |
178 | } | |
179 | argv += optind; | |
180 | ||
181 | if (!all && !numof_labels() && !numof_uuids() && *argv == NULL) | |
182 | usage(stderr, 2); | |
183 | ||
184 | mnt_init_debug(0); | |
185 | mntcache = mnt_new_cache(); | |
186 | ||
6cf8d46c KZ |
187 | for (i = 0; i < numof_labels(); i++) |
188 | status |= swapoff_by_label(get_label(i), !QUIET); | |
189 | ||
190 | for (i = 0; i < numof_uuids(); i++) | |
191 | status |= swapoff_by_uuid(get_uuid(i), !QUIET); | |
192 | ||
193 | while (*argv != NULL) | |
194 | status |= do_swapoff(*argv++, !QUIET, !CANONIC); | |
195 | ||
e7b63bea KZ |
196 | if (all) |
197 | status |= swapoff_all(); | |
6cf8d46c KZ |
198 | |
199 | free_tables(); | |
200 | mnt_free_cache(mntcache); | |
201 | ||
202 | return status; | |
203 | } |