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449ddb2d LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
9 | under the terms of the GNU Lesser General Public License as published by |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
449ddb2d LP |
11 | (at your option) any later version. |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 16 | Lesser General Public License for more details. |
449ddb2d | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
449ddb2d LP |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
22 | #include <unistd.h> | |
449ddb2d LP |
23 | #include <errno.h> |
24 | #include <string.h> | |
25 | #include <sys/stat.h> | |
26 | #include <sys/wait.h> | |
27 | #include <mntent.h> | |
28 | ||
29 | #include "log.h" | |
30 | #include "util.h" | |
9eb977db | 31 | #include "path-util.h" |
24882e06 | 32 | #include "signal-util.h" |
449ddb2d | 33 | #include "mount-setup.h" |
9a57c629 | 34 | #include "exit-status.h" |
449ddb2d LP |
35 | |
36 | /* Goes through /etc/fstab and remounts all API file systems, applying | |
37 | * options that are in /etc/fstab that systemd might not have | |
38 | * respected */ | |
39 | ||
40 | int main(int argc, char *argv[]) { | |
22f4096c | 41 | int ret = EXIT_FAILURE; |
5862d652 | 42 | _cleanup_endmntent_ FILE *f = NULL; |
449ddb2d LP |
43 | struct mntent* me; |
44 | Hashmap *pids = NULL; | |
45 | ||
46 | if (argc > 1) { | |
47 | log_error("This program takes no argument."); | |
22f4096c | 48 | return EXIT_FAILURE; |
449ddb2d LP |
49 | } |
50 | ||
4cfa2c99 | 51 | log_set_target(LOG_TARGET_AUTO); |
449ddb2d LP |
52 | log_parse_environment(); |
53 | log_open(); | |
54 | ||
4c12626c LP |
55 | umask(0022); |
56 | ||
adb2ce5f LP |
57 | f = setmntent("/etc/fstab", "r"); |
58 | if (!f) { | |
5862d652 ZJS |
59 | if (errno == ENOENT) |
60 | return EXIT_SUCCESS; | |
e0295d26 | 61 | |
56f64d95 | 62 | log_error_errno(errno, "Failed to open /etc/fstab: %m"); |
5862d652 | 63 | return EXIT_FAILURE; |
449ddb2d LP |
64 | } |
65 | ||
d5099efc | 66 | pids = hashmap_new(NULL); |
adb2ce5f | 67 | if (!pids) { |
449ddb2d LP |
68 | log_error("Failed to allocate set"); |
69 | goto finish; | |
70 | } | |
71 | ||
22f4096c | 72 | ret = EXIT_SUCCESS; |
449ddb2d LP |
73 | |
74 | while ((me = getmntent(f))) { | |
75 | pid_t pid; | |
76 | int k; | |
77 | char *s; | |
78 | ||
b4efdf97 | 79 | /* Remount the root fs, /usr and all API VFS */ |
2b93b027 | 80 | if (!mount_point_is_api(me->mnt_dir) && |
b4efdf97 LP |
81 | !path_equal(me->mnt_dir, "/") && |
82 | !path_equal(me->mnt_dir, "/usr")) | |
449ddb2d LP |
83 | continue; |
84 | ||
85 | log_debug("Remounting %s", me->mnt_dir); | |
86 | ||
adb2ce5f LP |
87 | pid = fork(); |
88 | if (pid < 0) { | |
56f64d95 | 89 | log_error_errno(errno, "Failed to fork: %m"); |
adb2ce5f | 90 | ret = EXIT_FAILURE; |
449ddb2d LP |
91 | continue; |
92 | } | |
93 | ||
94 | if (pid == 0) { | |
95 | const char *arguments[5]; | |
96 | /* Child */ | |
97 | ||
ce30c8dc LP |
98 | (void) reset_all_signal_handlers(); |
99 | (void) reset_signal_mask(); | |
100 | ||
f00929ad | 101 | arguments[0] = MOUNT_PATH; |
449ddb2d LP |
102 | arguments[1] = me->mnt_dir; |
103 | arguments[2] = "-o"; | |
104 | arguments[3] = "remount"; | |
105 | arguments[4] = NULL; | |
106 | ||
f00929ad | 107 | execv(MOUNT_PATH, (char **) arguments); |
449ddb2d | 108 | |
f00929ad | 109 | log_error_errno(errno, "Failed to execute " MOUNT_PATH ": %m"); |
22f4096c | 110 | _exit(EXIT_FAILURE); |
449ddb2d LP |
111 | } |
112 | ||
113 | /* Parent */ | |
114 | ||
115 | s = strdup(me->mnt_dir); | |
adb2ce5f | 116 | if (!s) { |
0d0f0c50 | 117 | log_oom(); |
adb2ce5f LP |
118 | ret = EXIT_FAILURE; |
119 | continue; | |
120 | } | |
121 | ||
449ddb2d | 122 | |
adb2ce5f LP |
123 | k = hashmap_put(pids, UINT_TO_PTR(pid), s); |
124 | if (k < 0) { | |
da927ba9 | 125 | log_error_errno(k, "Failed to add PID to set: %m"); |
22f4096c | 126 | ret = EXIT_FAILURE; |
449ddb2d LP |
127 | continue; |
128 | } | |
129 | } | |
130 | ||
131 | while (!hashmap_isempty(pids)) { | |
b92bea5d | 132 | siginfo_t si = {}; |
449ddb2d LP |
133 | char *s; |
134 | ||
449ddb2d LP |
135 | if (waitid(P_ALL, 0, &si, WEXITED) < 0) { |
136 | ||
137 | if (errno == EINTR) | |
138 | continue; | |
139 | ||
56f64d95 | 140 | log_error_errno(errno, "waitid() failed: %m"); |
22f4096c | 141 | ret = EXIT_FAILURE; |
449ddb2d LP |
142 | break; |
143 | } | |
144 | ||
adb2ce5f LP |
145 | s = hashmap_remove(pids, UINT_TO_PTR(si.si_pid)); |
146 | if (s) { | |
96342de6 | 147 | if (!is_clean_exit(si.si_code, si.si_status, NULL)) { |
449ddb2d | 148 | if (si.si_code == CLD_EXITED) |
f00929ad | 149 | log_error(MOUNT_PATH " for %s exited with exit status %i.", s, si.si_status); |
449ddb2d | 150 | else |
f00929ad | 151 | log_error(MOUNT_PATH " for %s terminated by signal %s.", s, signal_to_string(si.si_status)); |
449ddb2d | 152 | |
22f4096c | 153 | ret = EXIT_FAILURE; |
449ddb2d LP |
154 | } |
155 | ||
156 | free(s); | |
157 | } | |
158 | } | |
159 | ||
160 | finish: | |
161 | ||
162 | if (pids) | |
163 | hashmap_free_free(pids); | |
164 | ||
449ddb2d LP |
165 | return ret; |
166 | } |