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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
42483a74 | 2 | |
42483a74 | 3 | #include <errno.h> |
cf0fbc49 | 4 | #include <stdio.h> |
42483a74 | 5 | #include <sys/stat.h> |
42483a74 | 6 | |
b5efdb8a LP |
7 | #include "alloc-util.h" |
8 | #include "fileio.h" | |
42483a74 IS |
9 | #include "log.h" |
10 | #include "util.h" | |
42483a74 IS |
11 | |
12 | int main(int argc, char *argv[]) { | |
13 | struct stat st; | |
14 | const char *device; | |
15 | _cleanup_free_ char *major_minor = NULL; | |
16 | int r; | |
17 | ||
18 | if (argc != 2) { | |
19 | log_error("This program expects one argument."); | |
20 | return EXIT_FAILURE; | |
21 | } | |
22 | ||
23 | log_set_target(LOG_TARGET_AUTO); | |
24 | log_parse_environment(); | |
25 | log_open(); | |
26 | ||
27 | umask(0022); | |
28 | ||
ac528e3e LP |
29 | /* Refuse to run unless we are in an initrd() */ |
30 | if (!in_initrd()) | |
31 | return EXIT_SUCCESS; | |
32 | ||
42483a74 IS |
33 | device = argv[1]; |
34 | ||
35 | if (stat(device, &st) < 0) { | |
56f64d95 | 36 | log_error_errno(errno, "Failed to stat '%s': %m", device); |
42483a74 IS |
37 | return EXIT_FAILURE; |
38 | } | |
39 | ||
40 | if (!S_ISBLK(st.st_mode)) { | |
41 | log_error("Resume device '%s' is not a block device.", device); | |
42 | return EXIT_FAILURE; | |
43 | } | |
44 | ||
45 | if (asprintf(&major_minor, "%d:%d", major(st.st_rdev), minor(st.st_rdev)) < 0) { | |
46 | log_oom(); | |
47 | return EXIT_FAILURE; | |
48 | } | |
49 | ||
57512c89 | 50 | r = write_string_file("/sys/power/resume", major_minor, WRITE_STRING_FILE_DISABLE_BUFFER); |
42483a74 | 51 | if (r < 0) { |
da927ba9 | 52 | log_error_errno(r, "Failed to write '%s' to /sys/power/resume: %m", major_minor); |
42483a74 IS |
53 | return EXIT_FAILURE; |
54 | } | |
55 | ||
56 | /* | |
57 | * The write above shall not return. | |
58 | * | |
59 | * However, failed resume is a normal condition (may mean that there is | |
60 | * no hibernation image). | |
61 | */ | |
62 | ||
63 | log_info("Could not resume from '%s' (%s).", device, major_minor); | |
64 | return EXIT_SUCCESS; | |
65 | } |