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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 | |
9 | under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
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 | |
16 | General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
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" | |
32 | #include "set.h" | |
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; |
449ddb2d LP |
42 | FILE *f = NULL; |
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) { | |
449ddb2d LP |
59 | log_error("Failed to open /etc/fstab: %m"); |
60 | goto finish; | |
61 | } | |
62 | ||
adb2ce5f LP |
63 | pids = hashmap_new(trivial_hash_func, trivial_compare_func); |
64 | if (!pids) { | |
449ddb2d LP |
65 | log_error("Failed to allocate set"); |
66 | goto finish; | |
67 | } | |
68 | ||
22f4096c | 69 | ret = EXIT_SUCCESS; |
449ddb2d LP |
70 | |
71 | while ((me = getmntent(f))) { | |
72 | pid_t pid; | |
73 | int k; | |
74 | char *s; | |
75 | ||
76 | if (!mount_point_is_api(me->mnt_dir)) | |
77 | continue; | |
78 | ||
79 | log_debug("Remounting %s", me->mnt_dir); | |
80 | ||
adb2ce5f LP |
81 | pid = fork(); |
82 | if (pid < 0) { | |
449ddb2d | 83 | log_error("Failed to fork: %m"); |
adb2ce5f | 84 | ret = EXIT_FAILURE; |
449ddb2d LP |
85 | continue; |
86 | } | |
87 | ||
88 | if (pid == 0) { | |
89 | const char *arguments[5]; | |
90 | /* Child */ | |
91 | ||
92 | arguments[0] = "/bin/mount"; | |
93 | arguments[1] = me->mnt_dir; | |
94 | arguments[2] = "-o"; | |
95 | arguments[3] = "remount"; | |
96 | arguments[4] = NULL; | |
97 | ||
98 | execv("/bin/mount", (char **) arguments); | |
99 | ||
100 | log_error("Failed to execute /bin/mount: %m"); | |
22f4096c | 101 | _exit(EXIT_FAILURE); |
449ddb2d LP |
102 | } |
103 | ||
104 | /* Parent */ | |
105 | ||
106 | s = strdup(me->mnt_dir); | |
adb2ce5f LP |
107 | if (!s) { |
108 | log_error("Out of memory."); | |
109 | ret = EXIT_FAILURE; | |
110 | continue; | |
111 | } | |
112 | ||
449ddb2d | 113 | |
adb2ce5f LP |
114 | k = hashmap_put(pids, UINT_TO_PTR(pid), s); |
115 | if (k < 0) { | |
449ddb2d | 116 | log_error("Failed to add PID to set: %s", strerror(-k)); |
22f4096c | 117 | ret = EXIT_FAILURE; |
449ddb2d LP |
118 | continue; |
119 | } | |
120 | } | |
121 | ||
122 | while (!hashmap_isempty(pids)) { | |
123 | siginfo_t si; | |
124 | char *s; | |
125 | ||
126 | zero(si); | |
127 | if (waitid(P_ALL, 0, &si, WEXITED) < 0) { | |
128 | ||
129 | if (errno == EINTR) | |
130 | continue; | |
131 | ||
132 | log_error("waitid() failed: %m"); | |
22f4096c | 133 | ret = EXIT_FAILURE; |
449ddb2d LP |
134 | break; |
135 | } | |
136 | ||
adb2ce5f LP |
137 | s = hashmap_remove(pids, UINT_TO_PTR(si.si_pid)); |
138 | if (s) { | |
449ddb2d LP |
139 | if (!is_clean_exit(si.si_code, si.si_status)) { |
140 | if (si.si_code == CLD_EXITED) | |
141 | log_error("/bin/mount for %s exited with exit status %i.", s, si.si_status); | |
142 | else | |
143 | log_error("/bin/mount for %s terminated by signal %s.", s, signal_to_string(si.si_status)); | |
144 | ||
22f4096c | 145 | ret = EXIT_FAILURE; |
449ddb2d LP |
146 | } |
147 | ||
148 | free(s); | |
149 | } | |
150 | } | |
151 | ||
152 | finish: | |
153 | ||
154 | if (pids) | |
155 | hashmap_free_free(pids); | |
156 | ||
157 | if (f) | |
158 | endmntent(f); | |
159 | ||
160 | return ret; | |
161 | } |