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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 | ||
51 | log_set_target(LOG_TARGET_SYSLOG_OR_KMSG); | |
52 | log_parse_environment(); | |
53 | log_open(); | |
54 | ||
4c12626c LP |
55 | umask(0022); |
56 | ||
449ddb2d LP |
57 | if (!(f = setmntent("/etc/fstab", "r"))) { |
58 | log_error("Failed to open /etc/fstab: %m"); | |
59 | goto finish; | |
60 | } | |
61 | ||
62 | if (!(pids = hashmap_new(trivial_hash_func, trivial_compare_func))) { | |
63 | log_error("Failed to allocate set"); | |
64 | goto finish; | |
65 | } | |
66 | ||
22f4096c | 67 | ret = EXIT_SUCCESS; |
449ddb2d LP |
68 | |
69 | while ((me = getmntent(f))) { | |
70 | pid_t pid; | |
71 | int k; | |
72 | char *s; | |
73 | ||
74 | if (!mount_point_is_api(me->mnt_dir)) | |
75 | continue; | |
76 | ||
77 | log_debug("Remounting %s", me->mnt_dir); | |
78 | ||
79 | if ((pid = fork()) < 0) { | |
80 | log_error("Failed to fork: %m"); | |
81 | ret = 1; | |
82 | continue; | |
83 | } | |
84 | ||
85 | if (pid == 0) { | |
86 | const char *arguments[5]; | |
87 | /* Child */ | |
88 | ||
89 | arguments[0] = "/bin/mount"; | |
90 | arguments[1] = me->mnt_dir; | |
91 | arguments[2] = "-o"; | |
92 | arguments[3] = "remount"; | |
93 | arguments[4] = NULL; | |
94 | ||
95 | execv("/bin/mount", (char **) arguments); | |
96 | ||
97 | log_error("Failed to execute /bin/mount: %m"); | |
22f4096c | 98 | _exit(EXIT_FAILURE); |
449ddb2d LP |
99 | } |
100 | ||
101 | /* Parent */ | |
102 | ||
103 | s = strdup(me->mnt_dir); | |
104 | ||
105 | if ((k = hashmap_put(pids, UINT_TO_PTR(pid), s)) < 0) { | |
106 | log_error("Failed to add PID to set: %s", strerror(-k)); | |
22f4096c | 107 | ret = EXIT_FAILURE; |
449ddb2d LP |
108 | continue; |
109 | } | |
110 | } | |
111 | ||
112 | while (!hashmap_isempty(pids)) { | |
113 | siginfo_t si; | |
114 | char *s; | |
115 | ||
116 | zero(si); | |
117 | if (waitid(P_ALL, 0, &si, WEXITED) < 0) { | |
118 | ||
119 | if (errno == EINTR) | |
120 | continue; | |
121 | ||
122 | log_error("waitid() failed: %m"); | |
22f4096c | 123 | ret = EXIT_FAILURE; |
449ddb2d LP |
124 | break; |
125 | } | |
126 | ||
127 | if ((s = hashmap_remove(pids, UINT_TO_PTR(si.si_pid)))) { | |
128 | if (!is_clean_exit(si.si_code, si.si_status)) { | |
129 | if (si.si_code == CLD_EXITED) | |
130 | log_error("/bin/mount for %s exited with exit status %i.", s, si.si_status); | |
131 | else | |
132 | log_error("/bin/mount for %s terminated by signal %s.", s, signal_to_string(si.si_status)); | |
133 | ||
22f4096c | 134 | ret = EXIT_FAILURE; |
449ddb2d LP |
135 | } |
136 | ||
137 | free(s); | |
138 | } | |
139 | } | |
140 | ||
141 | finish: | |
142 | ||
143 | if (pids) | |
144 | hashmap_free_free(pids); | |
145 | ||
146 | if (f) | |
147 | endmntent(f); | |
148 | ||
149 | return ret; | |
150 | } |