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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
449ddb2d | 2 | |
449ddb2d | 3 | #include <errno.h> |
cf0fbc49 | 4 | #include <mntent.h> |
449ddb2d | 5 | #include <string.h> |
b16fee15 | 6 | #include <sys/prctl.h> |
449ddb2d LP |
7 | #include <sys/stat.h> |
8 | #include <sys/wait.h> | |
cf0fbc49 | 9 | #include <unistd.h> |
449ddb2d | 10 | |
4349cd7c | 11 | #include "exit-status.h" |
449ddb2d | 12 | #include "log.h" |
4349cd7c LP |
13 | #include "mount-setup.h" |
14 | #include "mount-util.h" | |
9eb977db | 15 | #include "path-util.h" |
b16fee15 | 16 | #include "process-util.h" |
24882e06 | 17 | #include "signal-util.h" |
b16fee15 | 18 | #include "strv.h" |
4349cd7c | 19 | #include "util.h" |
449ddb2d LP |
20 | |
21 | /* Goes through /etc/fstab and remounts all API file systems, applying | |
22 | * options that are in /etc/fstab that systemd might not have | |
23 | * respected */ | |
24 | ||
25 | int main(int argc, char *argv[]) { | |
b16fee15 | 26 | _cleanup_hashmap_free_free_ Hashmap *pids = NULL; |
5862d652 | 27 | _cleanup_endmntent_ FILE *f = NULL; |
449ddb2d | 28 | struct mntent* me; |
b16fee15 | 29 | int r; |
449ddb2d LP |
30 | |
31 | if (argc > 1) { | |
32 | log_error("This program takes no argument."); | |
22f4096c | 33 | return EXIT_FAILURE; |
449ddb2d LP |
34 | } |
35 | ||
4cfa2c99 | 36 | log_set_target(LOG_TARGET_AUTO); |
449ddb2d LP |
37 | log_parse_environment(); |
38 | log_open(); | |
39 | ||
4c12626c LP |
40 | umask(0022); |
41 | ||
9ffcff0e | 42 | f = setmntent("/etc/fstab", "re"); |
adb2ce5f | 43 | if (!f) { |
b16fee15 LP |
44 | if (errno == ENOENT) { |
45 | r = 0; | |
46 | goto finish; | |
47 | } | |
e0295d26 | 48 | |
b16fee15 LP |
49 | r = log_error_errno(errno, "Failed to open /etc/fstab: %m"); |
50 | goto finish; | |
449ddb2d LP |
51 | } |
52 | ||
d5099efc | 53 | pids = hashmap_new(NULL); |
adb2ce5f | 54 | if (!pids) { |
b16fee15 | 55 | r = log_oom(); |
449ddb2d LP |
56 | goto finish; |
57 | } | |
58 | ||
449ddb2d LP |
59 | while ((me = getmntent(f))) { |
60 | pid_t pid; | |
61 | int k; | |
62 | char *s; | |
63 | ||
b4efdf97 | 64 | /* Remount the root fs, /usr and all API VFS */ |
2b93b027 | 65 | if (!mount_point_is_api(me->mnt_dir) && |
b4efdf97 LP |
66 | !path_equal(me->mnt_dir, "/") && |
67 | !path_equal(me->mnt_dir, "/usr")) | |
449ddb2d LP |
68 | continue; |
69 | ||
70 | log_debug("Remounting %s", me->mnt_dir); | |
71 | ||
b6e1fff1 LP |
72 | r = safe_fork("(remount)", FORK_RESET_SIGNALS|FORK_DEATHSIG|FORK_LOG, &pid); |
73 | if (r < 0) | |
b16fee15 | 74 | goto finish; |
4c253ed1 | 75 | if (r == 0) { |
449ddb2d LP |
76 | /* Child */ |
77 | ||
b16fee15 | 78 | execv(MOUNT_PATH, STRV_MAKE(MOUNT_PATH, me->mnt_dir, "-o", "remount")); |
449ddb2d | 79 | |
f00929ad | 80 | log_error_errno(errno, "Failed to execute " MOUNT_PATH ": %m"); |
22f4096c | 81 | _exit(EXIT_FAILURE); |
449ddb2d LP |
82 | } |
83 | ||
84 | /* Parent */ | |
85 | ||
86 | s = strdup(me->mnt_dir); | |
adb2ce5f | 87 | if (!s) { |
b16fee15 LP |
88 | r = log_oom(); |
89 | goto finish; | |
adb2ce5f LP |
90 | } |
91 | ||
4a0b58c4 | 92 | k = hashmap_put(pids, PID_TO_PTR(pid), s); |
adb2ce5f | 93 | if (k < 0) { |
b16fee15 LP |
94 | free(s); |
95 | r = log_oom(); | |
96 | goto finish; | |
449ddb2d LP |
97 | } |
98 | } | |
99 | ||
b16fee15 | 100 | r = 0; |
449ddb2d | 101 | while (!hashmap_isempty(pids)) { |
b92bea5d | 102 | siginfo_t si = {}; |
449ddb2d LP |
103 | char *s; |
104 | ||
449ddb2d LP |
105 | if (waitid(P_ALL, 0, &si, WEXITED) < 0) { |
106 | ||
107 | if (errno == EINTR) | |
108 | continue; | |
109 | ||
b16fee15 LP |
110 | r = log_error_errno(errno, "waitid() failed: %m"); |
111 | goto finish; | |
449ddb2d LP |
112 | } |
113 | ||
4a0b58c4 | 114 | s = hashmap_remove(pids, PID_TO_PTR(si.si_pid)); |
adb2ce5f | 115 | if (s) { |
1f0958f6 | 116 | if (!is_clean_exit(si.si_code, si.si_status, EXIT_CLEAN_COMMAND, NULL)) { |
449ddb2d | 117 | if (si.si_code == CLD_EXITED) |
f00929ad | 118 | log_error(MOUNT_PATH " for %s exited with exit status %i.", s, si.si_status); |
449ddb2d | 119 | else |
f00929ad | 120 | log_error(MOUNT_PATH " for %s terminated by signal %s.", s, signal_to_string(si.si_status)); |
449ddb2d | 121 | |
b16fee15 | 122 | r = -ENOEXEC; |
449ddb2d LP |
123 | } |
124 | ||
125 | free(s); | |
126 | } | |
127 | } | |
128 | ||
129 | finish: | |
b16fee15 | 130 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; |
449ddb2d | 131 | } |