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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) | |
42 | printf(_("swapoff %s\n"), orig_special); | |
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 | ||
95 | ||
96 | int main(int argc, char *argv[]) | |
97 | { | |
98 | FILE *fp; | |
99 | struct mntent *fstab; | |
100 | int status = 0, c; | |
101 | size_t i; | |
102 | ||
103 | static const struct option long_opts[] = { | |
104 | { "all", 0, 0, 'a' }, | |
105 | { "help", 0, 0, 'h' }, | |
106 | { "verbose", 0, 0, 'v' }, | |
107 | { "version", 0, 0, 'V' }, | |
108 | { NULL, 0, 0, 0 } | |
109 | }; | |
110 | ||
111 | setlocale(LC_ALL, ""); | |
112 | bindtextdomain(PACKAGE, LOCALEDIR); | |
113 | textdomain(PACKAGE); | |
114 | atexit(close_stdout); | |
115 | ||
116 | while ((c = getopt_long(argc, argv, "ahvVL:U:", | |
117 | long_opts, NULL)) != -1) { | |
118 | switch (c) { | |
119 | case 'a': /* all */ | |
120 | ++all; | |
121 | break; | |
122 | case 'h': /* help */ | |
123 | usage(stdout, 0); | |
124 | break; | |
125 | case 'v': /* be chatty */ | |
126 | ++verbose; | |
127 | break; | |
128 | case 'V': /* version */ | |
129 | printf(UTIL_LINUX_VERSION); | |
130 | return EXIT_SUCCESS; | |
131 | case 'L': | |
132 | add_label(optarg); | |
133 | break; | |
134 | case 'U': | |
135 | add_uuid(optarg); | |
136 | break; | |
137 | case 0: | |
138 | break; | |
139 | case '?': | |
140 | default: | |
141 | usage(stderr, 1); | |
142 | } | |
143 | } | |
144 | argv += optind; | |
145 | ||
146 | if (!all && !numof_labels() && !numof_uuids() && *argv == NULL) | |
147 | usage(stderr, 2); | |
148 | ||
149 | mnt_init_debug(0); | |
150 | mntcache = mnt_new_cache(); | |
151 | ||
152 | /* | |
153 | * swapoff any explicitly given arguments. | |
154 | * Complain in case the swapoff call fails. | |
155 | */ | |
156 | for (i = 0; i < numof_labels(); i++) | |
157 | status |= swapoff_by_label(get_label(i), !QUIET); | |
158 | ||
159 | for (i = 0; i < numof_uuids(); i++) | |
160 | status |= swapoff_by_uuid(get_uuid(i), !QUIET); | |
161 | ||
162 | while (*argv != NULL) | |
163 | status |= do_swapoff(*argv++, !QUIET, !CANONIC); | |
164 | ||
165 | if (all) { | |
166 | /* | |
167 | * In case /proc/swaps exists, unswap stuff listed there. | |
168 | * We are quiet but report errors in status. | |
169 | * Errors might mean that /proc/swaps | |
170 | * exists as ordinary file, not in procfs. | |
171 | * do_swapoff() exits immediately on EPERM. | |
172 | */ | |
173 | struct libmnt_table *st = get_swaps(); | |
174 | ||
175 | if (st && mnt_table_get_nents(st) > 0) { | |
176 | struct libmnt_iter *itr = mnt_new_iter(MNT_ITER_BACKWARD); | |
177 | struct libmnt_fs *fs; | |
178 | ||
179 | while (itr && mnt_table_next_fs(st, itr, &fs) == 0) | |
180 | status |= do_swapoff(mnt_fs_get_source(fs), | |
181 | QUIET, CANONIC); | |
182 | ||
183 | mnt_free_iter(itr); | |
184 | } | |
185 | ||
186 | /* | |
187 | * Unswap stuff mentioned in /etc/fstab. | |
188 | * Probably it was unmounted already, so errors are not bad. | |
189 | * Doing swapoff -a twice should not give error messages. | |
190 | */ | |
191 | fp = setmntent(_PATH_MNTTAB, "r"); | |
192 | if (fp == NULL) | |
193 | err(2, _("%s: open failed"), _PATH_MNTTAB); | |
194 | ||
195 | while ((fstab = getmntent(fp)) != NULL) { | |
196 | const char *special; | |
197 | ||
198 | if (strcmp(fstab->mnt_type, MNTTYPE_SWAP) != 0) | |
199 | continue; | |
200 | ||
201 | special = mnt_resolve_spec(fstab->mnt_fsname, mntcache); | |
202 | if (!special) | |
203 | continue; | |
204 | ||
205 | if (!is_active_swap(special)) | |
206 | do_swapoff(special, QUIET, CANONIC); | |
207 | } | |
208 | fclose(fp); | |
209 | } | |
210 | ||
211 | free_tables(); | |
212 | mnt_free_cache(mntcache); | |
213 | ||
214 | return status; | |
215 | } |