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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" | |
34 | ||
35 | /* Goes through /etc/fstab and remounts all API file systems, applying | |
36 | * options that are in /etc/fstab that systemd might not have | |
37 | * respected */ | |
38 | ||
39 | int main(int argc, char *argv[]) { | |
40 | int ret = 1; | |
41 | FILE *f = NULL; | |
42 | struct mntent* me; | |
43 | Hashmap *pids = NULL; | |
44 | ||
45 | if (argc > 1) { | |
46 | log_error("This program takes no argument."); | |
47 | return 1; | |
48 | } | |
49 | ||
50 | log_set_target(LOG_TARGET_SYSLOG_OR_KMSG); | |
51 | log_parse_environment(); | |
52 | log_open(); | |
53 | ||
54 | if (!(f = setmntent("/etc/fstab", "r"))) { | |
55 | log_error("Failed to open /etc/fstab: %m"); | |
56 | goto finish; | |
57 | } | |
58 | ||
59 | if (!(pids = hashmap_new(trivial_hash_func, trivial_compare_func))) { | |
60 | log_error("Failed to allocate set"); | |
61 | goto finish; | |
62 | } | |
63 | ||
64 | ret = 0; | |
65 | ||
66 | while ((me = getmntent(f))) { | |
67 | pid_t pid; | |
68 | int k; | |
69 | char *s; | |
70 | ||
71 | if (!mount_point_is_api(me->mnt_dir)) | |
72 | continue; | |
73 | ||
74 | log_debug("Remounting %s", me->mnt_dir); | |
75 | ||
76 | if ((pid = fork()) < 0) { | |
77 | log_error("Failed to fork: %m"); | |
78 | ret = 1; | |
79 | continue; | |
80 | } | |
81 | ||
82 | if (pid == 0) { | |
83 | const char *arguments[5]; | |
84 | /* Child */ | |
85 | ||
86 | arguments[0] = "/bin/mount"; | |
87 | arguments[1] = me->mnt_dir; | |
88 | arguments[2] = "-o"; | |
89 | arguments[3] = "remount"; | |
90 | arguments[4] = NULL; | |
91 | ||
92 | execv("/bin/mount", (char **) arguments); | |
93 | ||
94 | log_error("Failed to execute /bin/mount: %m"); | |
95 | _exit(1); | |
96 | } | |
97 | ||
98 | /* Parent */ | |
99 | ||
100 | s = strdup(me->mnt_dir); | |
101 | ||
102 | if ((k = hashmap_put(pids, UINT_TO_PTR(pid), s)) < 0) { | |
103 | log_error("Failed to add PID to set: %s", strerror(-k)); | |
104 | ret = 1; | |
105 | continue; | |
106 | } | |
107 | } | |
108 | ||
109 | while (!hashmap_isempty(pids)) { | |
110 | siginfo_t si; | |
111 | char *s; | |
112 | ||
113 | zero(si); | |
114 | if (waitid(P_ALL, 0, &si, WEXITED) < 0) { | |
115 | ||
116 | if (errno == EINTR) | |
117 | continue; | |
118 | ||
119 | log_error("waitid() failed: %m"); | |
120 | ret = 1; | |
121 | break; | |
122 | } | |
123 | ||
124 | if ((s = hashmap_remove(pids, UINT_TO_PTR(si.si_pid)))) { | |
125 | if (!is_clean_exit(si.si_code, si.si_status)) { | |
126 | if (si.si_code == CLD_EXITED) | |
127 | log_error("/bin/mount for %s exited with exit status %i.", s, si.si_status); | |
128 | else | |
129 | log_error("/bin/mount for %s terminated by signal %s.", s, signal_to_string(si.si_status)); | |
130 | ||
131 | ret = 1; | |
132 | } | |
133 | ||
134 | free(s); | |
135 | } | |
136 | } | |
137 | ||
138 | finish: | |
139 | ||
140 | if (pids) | |
141 | hashmap_free_free(pids); | |
142 | ||
143 | if (f) | |
144 | endmntent(f); | |
145 | ||
146 | return ret; | |
147 | } |