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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" |
5e332028 | 13 | #include "main-func.h" |
4349cd7c LP |
14 | #include "mount-setup.h" |
15 | #include "mount-util.h" | |
9eb977db | 16 | #include "path-util.h" |
b16fee15 | 17 | #include "process-util.h" |
24882e06 | 18 | #include "signal-util.h" |
b16fee15 | 19 | #include "strv.h" |
4349cd7c | 20 | #include "util.h" |
449ddb2d LP |
21 | |
22 | /* Goes through /etc/fstab and remounts all API file systems, applying | |
23 | * options that are in /etc/fstab that systemd might not have | |
24 | * respected */ | |
25 | ||
6e61c701 | 26 | static int run(int argc, char *argv[]) { |
b16fee15 | 27 | _cleanup_hashmap_free_free_ Hashmap *pids = NULL; |
5862d652 | 28 | _cleanup_endmntent_ FILE *f = NULL; |
449ddb2d | 29 | struct mntent* me; |
b16fee15 | 30 | int r; |
449ddb2d | 31 | |
6bf3c61c | 32 | log_setup_service(); |
449ddb2d | 33 | |
6e61c701 ZJS |
34 | if (argc > 1) { |
35 | log_error("This program takes no arguments."); | |
36 | return -EINVAL; | |
37 | } | |
38 | ||
4c12626c LP |
39 | umask(0022); |
40 | ||
9ffcff0e | 41 | f = setmntent("/etc/fstab", "re"); |
adb2ce5f | 42 | if (!f) { |
6e61c701 ZJS |
43 | if (errno == ENOENT) |
44 | return 0; | |
e0295d26 | 45 | |
6e61c701 | 46 | return log_error_errno(errno, "Failed to open /etc/fstab: %m"); |
449ddb2d LP |
47 | } |
48 | ||
d5099efc | 49 | pids = hashmap_new(NULL); |
6e61c701 ZJS |
50 | if (!pids) |
51 | return log_oom(); | |
449ddb2d | 52 | |
449ddb2d | 53 | while ((me = getmntent(f))) { |
6e61c701 | 54 | _cleanup_free_ char *s = NULL; |
449ddb2d LP |
55 | pid_t pid; |
56 | int k; | |
449ddb2d | 57 | |
b4efdf97 | 58 | /* Remount the root fs, /usr and all API VFS */ |
2b93b027 | 59 | if (!mount_point_is_api(me->mnt_dir) && |
b4efdf97 LP |
60 | !path_equal(me->mnt_dir, "/") && |
61 | !path_equal(me->mnt_dir, "/usr")) | |
449ddb2d LP |
62 | continue; |
63 | ||
64 | log_debug("Remounting %s", me->mnt_dir); | |
65 | ||
b6e1fff1 LP |
66 | r = safe_fork("(remount)", FORK_RESET_SIGNALS|FORK_DEATHSIG|FORK_LOG, &pid); |
67 | if (r < 0) | |
6e61c701 | 68 | return r; |
4c253ed1 | 69 | if (r == 0) { |
449ddb2d LP |
70 | /* Child */ |
71 | ||
b16fee15 | 72 | execv(MOUNT_PATH, STRV_MAKE(MOUNT_PATH, me->mnt_dir, "-o", "remount")); |
449ddb2d | 73 | |
f00929ad | 74 | log_error_errno(errno, "Failed to execute " MOUNT_PATH ": %m"); |
22f4096c | 75 | _exit(EXIT_FAILURE); |
449ddb2d LP |
76 | } |
77 | ||
78 | /* Parent */ | |
79 | ||
80 | s = strdup(me->mnt_dir); | |
6e61c701 ZJS |
81 | if (!s) |
82 | return log_oom(); | |
adb2ce5f | 83 | |
4a0b58c4 | 84 | k = hashmap_put(pids, PID_TO_PTR(pid), s); |
6e61c701 ZJS |
85 | if (k < 0) |
86 | return log_oom(); | |
87 | TAKE_PTR(s); | |
449ddb2d LP |
88 | } |
89 | ||
b16fee15 | 90 | r = 0; |
449ddb2d | 91 | while (!hashmap_isempty(pids)) { |
b92bea5d | 92 | siginfo_t si = {}; |
6e61c701 | 93 | _cleanup_free_ char *s = NULL; |
449ddb2d | 94 | |
449ddb2d | 95 | if (waitid(P_ALL, 0, &si, WEXITED) < 0) { |
449ddb2d LP |
96 | if (errno == EINTR) |
97 | continue; | |
98 | ||
6e61c701 | 99 | return log_error_errno(errno, "waitid() failed: %m"); |
449ddb2d LP |
100 | } |
101 | ||
4a0b58c4 | 102 | s = hashmap_remove(pids, PID_TO_PTR(si.si_pid)); |
6e61c701 ZJS |
103 | if (s && |
104 | !is_clean_exit(si.si_code, si.si_status, EXIT_CLEAN_COMMAND, NULL)) { | |
105 | if (si.si_code == CLD_EXITED) | |
106 | log_error(MOUNT_PATH " for %s exited with exit status %i.", s, si.si_status); | |
107 | else | |
108 | log_error(MOUNT_PATH " for %s terminated by signal %s.", s, signal_to_string(si.si_status)); | |
109 | ||
110 | r = -ENOEXEC; | |
449ddb2d LP |
111 | } |
112 | } | |
113 | ||
6e61c701 | 114 | return r; |
449ddb2d | 115 | } |
6e61c701 ZJS |
116 | |
117 | DEFINE_MAIN_FUNCTION(run); |