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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; |
449ddb2d LP |
43 | FILE *f = NULL; |
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) { | |
e0295d26 LP |
60 | if (errno == ENOENT) { |
61 | ret = EXIT_SUCCESS; | |
62 | goto finish; | |
63 | } | |
64 | ||
449ddb2d LP |
65 | log_error("Failed to open /etc/fstab: %m"); |
66 | goto finish; | |
67 | } | |
68 | ||
adb2ce5f LP |
69 | pids = hashmap_new(trivial_hash_func, trivial_compare_func); |
70 | if (!pids) { | |
449ddb2d LP |
71 | log_error("Failed to allocate set"); |
72 | goto finish; | |
73 | } | |
74 | ||
22f4096c | 75 | ret = EXIT_SUCCESS; |
449ddb2d LP |
76 | |
77 | while ((me = getmntent(f))) { | |
78 | pid_t pid; | |
79 | int k; | |
80 | char *s; | |
81 | ||
b4efdf97 | 82 | /* Remount the root fs, /usr and all API VFS */ |
2b93b027 | 83 | if (!mount_point_is_api(me->mnt_dir) && |
b4efdf97 LP |
84 | !path_equal(me->mnt_dir, "/") && |
85 | !path_equal(me->mnt_dir, "/usr")) | |
449ddb2d LP |
86 | continue; |
87 | ||
88 | log_debug("Remounting %s", me->mnt_dir); | |
89 | ||
adb2ce5f LP |
90 | pid = fork(); |
91 | if (pid < 0) { | |
449ddb2d | 92 | log_error("Failed to fork: %m"); |
adb2ce5f | 93 | ret = EXIT_FAILURE; |
449ddb2d LP |
94 | continue; |
95 | } | |
96 | ||
97 | if (pid == 0) { | |
98 | const char *arguments[5]; | |
99 | /* Child */ | |
100 | ||
101 | arguments[0] = "/bin/mount"; | |
102 | arguments[1] = me->mnt_dir; | |
103 | arguments[2] = "-o"; | |
104 | arguments[3] = "remount"; | |
105 | arguments[4] = NULL; | |
106 | ||
107 | execv("/bin/mount", (char **) arguments); | |
108 | ||
109 | log_error("Failed to execute /bin/mount: %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) { | |
449ddb2d | 125 | log_error("Failed to add PID to set: %s", strerror(-k)); |
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 | ||
140 | log_error("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 LP |
148 | if (si.si_code == CLD_EXITED) |
149 | log_error("/bin/mount for %s exited with exit status %i.", s, si.si_status); | |
150 | else | |
151 | log_error("/bin/mount for %s terminated by signal %s.", s, signal_to_string(si.si_status)); | |
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 | ||
165 | if (f) | |
166 | endmntent(f); | |
167 | ||
168 | return ret; | |
169 | } |