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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> | |
23 | #include <fcntl.h> | |
24 | #include <errno.h> | |
25 | #include <string.h> | |
26 | #include <sys/stat.h> | |
27 | #include <sys/wait.h> | |
28 | #include <mntent.h> | |
29 | ||
30 | #include "log.h" | |
31 | #include "util.h" | |
9eb977db | 32 | #include "path-util.h" |
449ddb2d LP |
33 | #include "set.h" |
34 | #include "mount-setup.h" | |
9a57c629 | 35 | #include "exit-status.h" |
449ddb2d LP |
36 | |
37 | /* Goes through /etc/fstab and remounts all API file systems, applying | |
38 | * options that are in /etc/fstab that systemd might not have | |
39 | * respected */ | |
40 | ||
41 | int main(int argc, char *argv[]) { | |
22f4096c | 42 | int ret = EXIT_FAILURE; |
5862d652 | 43 | _cleanup_endmntent_ FILE *f = NULL; |
449ddb2d LP |
44 | struct mntent* me; |
45 | Hashmap *pids = NULL; | |
46 | ||
47 | if (argc > 1) { | |
48 | log_error("This program takes no argument."); | |
22f4096c | 49 | return EXIT_FAILURE; |
449ddb2d LP |
50 | } |
51 | ||
4cfa2c99 | 52 | log_set_target(LOG_TARGET_AUTO); |
449ddb2d LP |
53 | log_parse_environment(); |
54 | log_open(); | |
55 | ||
4c12626c LP |
56 | umask(0022); |
57 | ||
adb2ce5f LP |
58 | f = setmntent("/etc/fstab", "r"); |
59 | if (!f) { | |
5862d652 ZJS |
60 | if (errno == ENOENT) |
61 | return EXIT_SUCCESS; | |
e0295d26 | 62 | |
449ddb2d | 63 | log_error("Failed to open /etc/fstab: %m"); |
5862d652 | 64 | return EXIT_FAILURE; |
449ddb2d LP |
65 | } |
66 | ||
d5099efc | 67 | pids = hashmap_new(NULL); |
adb2ce5f | 68 | if (!pids) { |
449ddb2d LP |
69 | log_error("Failed to allocate set"); |
70 | goto finish; | |
71 | } | |
72 | ||
22f4096c | 73 | ret = EXIT_SUCCESS; |
449ddb2d LP |
74 | |
75 | while ((me = getmntent(f))) { | |
76 | pid_t pid; | |
77 | int k; | |
78 | char *s; | |
79 | ||
b4efdf97 | 80 | /* Remount the root fs, /usr and all API VFS */ |
2b93b027 | 81 | if (!mount_point_is_api(me->mnt_dir) && |
b4efdf97 LP |
82 | !path_equal(me->mnt_dir, "/") && |
83 | !path_equal(me->mnt_dir, "/usr")) | |
449ddb2d LP |
84 | continue; |
85 | ||
86 | log_debug("Remounting %s", me->mnt_dir); | |
87 | ||
adb2ce5f LP |
88 | pid = fork(); |
89 | if (pid < 0) { | |
449ddb2d | 90 | log_error("Failed to fork: %m"); |
adb2ce5f | 91 | ret = EXIT_FAILURE; |
449ddb2d LP |
92 | continue; |
93 | } | |
94 | ||
95 | if (pid == 0) { | |
96 | const char *arguments[5]; | |
97 | /* Child */ | |
98 | ||
99 | arguments[0] = "/bin/mount"; | |
100 | arguments[1] = me->mnt_dir; | |
101 | arguments[2] = "-o"; | |
102 | arguments[3] = "remount"; | |
103 | arguments[4] = NULL; | |
104 | ||
105 | execv("/bin/mount", (char **) arguments); | |
106 | ||
107 | log_error("Failed to execute /bin/mount: %m"); | |
22f4096c | 108 | _exit(EXIT_FAILURE); |
449ddb2d LP |
109 | } |
110 | ||
111 | /* Parent */ | |
112 | ||
113 | s = strdup(me->mnt_dir); | |
adb2ce5f | 114 | if (!s) { |
0d0f0c50 | 115 | log_oom(); |
adb2ce5f LP |
116 | ret = EXIT_FAILURE; |
117 | continue; | |
118 | } | |
119 | ||
449ddb2d | 120 | |
adb2ce5f LP |
121 | k = hashmap_put(pids, UINT_TO_PTR(pid), s); |
122 | if (k < 0) { | |
0a1beeb6 | 123 | log_error_errno(-k, "Failed to add PID to set: %m"); |
22f4096c | 124 | ret = EXIT_FAILURE; |
449ddb2d LP |
125 | continue; |
126 | } | |
127 | } | |
128 | ||
129 | while (!hashmap_isempty(pids)) { | |
b92bea5d | 130 | siginfo_t si = {}; |
449ddb2d LP |
131 | char *s; |
132 | ||
449ddb2d LP |
133 | if (waitid(P_ALL, 0, &si, WEXITED) < 0) { |
134 | ||
135 | if (errno == EINTR) | |
136 | continue; | |
137 | ||
138 | log_error("waitid() failed: %m"); | |
22f4096c | 139 | ret = EXIT_FAILURE; |
449ddb2d LP |
140 | break; |
141 | } | |
142 | ||
adb2ce5f LP |
143 | s = hashmap_remove(pids, UINT_TO_PTR(si.si_pid)); |
144 | if (s) { | |
96342de6 | 145 | if (!is_clean_exit(si.si_code, si.si_status, NULL)) { |
449ddb2d LP |
146 | if (si.si_code == CLD_EXITED) |
147 | log_error("/bin/mount for %s exited with exit status %i.", s, si.si_status); | |
148 | else | |
149 | log_error("/bin/mount for %s terminated by signal %s.", s, signal_to_string(si.si_status)); | |
150 | ||
22f4096c | 151 | ret = EXIT_FAILURE; |
449ddb2d LP |
152 | } |
153 | ||
154 | free(s); | |
155 | } | |
156 | } | |
157 | ||
158 | finish: | |
159 | ||
160 | if (pids) | |
161 | hashmap_free_free(pids); | |
162 | ||
449ddb2d LP |
163 | return ret; |
164 | } |