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Commit | Line | Data |
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f0083e3d | 1 | /* |
e8d569b4 | 2 | * Copyright (C) 2003-2004 Greg Kroah-Hartman <greg@kroah.com> |
55e9959b | 3 | * Copyright (C) 2004-2008 Kay Sievers <kay.sievers@vrfy.org> |
f0083e3d | 4 | * |
55e9959b KS |
5 | * This program is free software: you can redistribute it and/or modify |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation, either version 2 of the License, or | |
8 | * (at your option) any later version. | |
f0083e3d | 9 | * |
55e9959b KS |
10 | * This program is distributed in the hope that it will be useful, |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
f0083e3d GKH |
17 | */ |
18 | ||
c81b35c0 KS |
19 | #include <stdio.h> |
20 | #include <stddef.h> | |
f0083e3d GKH |
21 | #include <stdlib.h> |
22 | #include <string.h> | |
c449b25e | 23 | #include <fcntl.h> |
e8baccca | 24 | #include <ctype.h> |
c81b35c0 | 25 | #include <errno.h> |
1ceba936 | 26 | #include <unistd.h> |
27f877e6 | 27 | #include <syslog.h> |
44aff4cd | 28 | #include <grp.h> |
4cb72937 KS |
29 | #include <sched.h> |
30 | #include <sys/mount.h> | |
2181d30a | 31 | #include <sys/signalfd.h> |
85511f02 | 32 | |
f0083e3d | 33 | #include "udev.h" |
f0083e3d | 34 | |
dd8a93e0 | 35 | void udev_main_log(struct udev *udev, int priority, |
912541b0 KS |
36 | const char *file, int line, const char *fn, |
37 | const char *format, va_list args) {} | |
dd8a93e0 | 38 | |
4cb72937 KS |
39 | static int fake_filesystems(void) { |
40 | static const struct fakefs { | |
41 | const char *src; | |
42 | const char *target; | |
43 | const char *error; | |
44 | } fakefss[] = { | |
45 | { "test/sys", "/sys", "failed to mount test /sys" }, | |
46 | { "test/dev", "/dev", "failed to mount test /dev" }, | |
47 | { "test/run", "/run", "failed to mount test /run" }, | |
48 | { "test/run", "/etc/udev/rules.d", "failed to mount empty /etc/udev/rules.d" }, | |
49 | { "test/run", "/usr/lib/udev/rules.d", "failed to mount empty /usr/lib/udev/rules.d" }, | |
50 | }; | |
51 | unsigned int i; | |
52 | int err; | |
53 | ||
54 | err = unshare(CLONE_NEWNS); | |
55 | if (err < 0) { | |
56 | err = -errno; | |
04eaa668 KS |
57 | fprintf(stderr, "failed to call unshare(): %m\n"); |
58 | goto out; | |
59 | } | |
60 | ||
61 | if (mount(NULL, "/", NULL, MS_PRIVATE|MS_REC, NULL) < 0) { | |
62 | err = -errno; | |
63 | fprintf(stderr, "failed to mount / as private: %m\n"); | |
64 | goto out; | |
4cb72937 KS |
65 | } |
66 | ||
67 | for (i = 0; i < ELEMENTSOF(fakefss); i++) { | |
68 | err = mount(fakefss[i].src, fakefss[i].target, NULL, MS_BIND, NULL); | |
69 | if (err < 0) { | |
70 | err = -errno; | |
71 | fprintf(stderr, "%s %m", fakefss[i].error); | |
72 | return err; | |
73 | } | |
74 | } | |
04eaa668 | 75 | out: |
4cb72937 KS |
76 | return err; |
77 | } | |
78 | ||
79 | ||
59345311 | 80 | int main(int argc, char *argv[]) |
f4dc8d11 | 81 | { |
912541b0 KS |
82 | struct udev *udev; |
83 | struct udev_event *event = NULL; | |
84 | struct udev_device *dev = NULL; | |
85 | struct udev_rules *rules = NULL; | |
86 | char syspath[UTIL_PATH_SIZE]; | |
87 | const char *devpath; | |
88 | const char *action; | |
89 | sigset_t mask, sigmask_orig; | |
4cb72937 KS |
90 | int err; |
91 | ||
92 | err = fake_filesystems(); | |
93 | if (err < 0) | |
94 | return EXIT_FAILURE; | |
912541b0 KS |
95 | |
96 | udev = udev_new(); | |
97 | if (udev == NULL) | |
1c0f62e3 | 98 | exit(EXIT_FAILURE); |
baa30fbc | 99 | log_debug("version %s\n", VERSION); |
0f9963a8 | 100 | label_init("/dev"); |
912541b0 KS |
101 | |
102 | sigprocmask(SIG_SETMASK, NULL, &sigmask_orig); | |
103 | ||
104 | action = argv[1]; | |
105 | if (action == NULL) { | |
baa30fbc | 106 | log_error("action missing\n"); |
912541b0 KS |
107 | goto out; |
108 | } | |
109 | ||
110 | devpath = argv[2]; | |
111 | if (devpath == NULL) { | |
baa30fbc | 112 | log_error("devpath missing\n"); |
912541b0 KS |
113 | goto out; |
114 | } | |
115 | ||
116 | rules = udev_rules_new(udev, 1); | |
117 | ||
4cb72937 | 118 | util_strscpyl(syspath, sizeof(syspath), "/sys", devpath, NULL); |
912541b0 KS |
119 | dev = udev_device_new_from_syspath(udev, syspath); |
120 | if (dev == NULL) { | |
baa30fbc | 121 | log_debug("unknown device '%s'\n", devpath); |
912541b0 KS |
122 | goto out; |
123 | } | |
124 | ||
125 | udev_device_set_action(dev, action); | |
126 | event = udev_event_new(dev); | |
127 | ||
128 | sigfillset(&mask); | |
129 | sigprocmask(SIG_SETMASK, &mask, &sigmask_orig); | |
130 | event->fd_signal = signalfd(-1, &mask, SFD_NONBLOCK|SFD_CLOEXEC); | |
131 | if (event->fd_signal < 0) { | |
132 | fprintf(stderr, "error creating signalfd\n"); | |
133 | goto out; | |
134 | } | |
135 | ||
136 | /* do what devtmpfs usually provides us */ | |
137 | if (udev_device_get_devnode(dev) != NULL) { | |
83cd6b75 | 138 | mode_t mode = 0600; |
912541b0 KS |
139 | |
140 | if (strcmp(udev_device_get_subsystem(dev), "block") == 0) | |
141 | mode |= S_IFBLK; | |
142 | else | |
143 | mode |= S_IFCHR; | |
144 | ||
145 | if (strcmp(action, "remove") != 0) { | |
d2e54fae | 146 | mkdir_parents_label(udev_device_get_devnode(dev), 0755); |
912541b0 KS |
147 | mknod(udev_device_get_devnode(dev), mode, udev_device_get_devnum(dev)); |
148 | } else { | |
149 | unlink(udev_device_get_devnode(dev)); | |
150 | util_delete_path(udev, udev_device_get_devnode(dev)); | |
151 | } | |
152 | } | |
153 | ||
154 | err = udev_event_execute_rules(event, rules, &sigmask_orig); | |
155 | if (err == 0) | |
156 | udev_event_execute_run(event, NULL); | |
2181d30a | 157 | out: |
912541b0 KS |
158 | if (event != NULL && event->fd_signal >= 0) |
159 | close(event->fd_signal); | |
160 | udev_event_unref(event); | |
161 | udev_device_unref(dev); | |
162 | udev_rules_unref(rules); | |
e9a5ef7c | 163 | label_finish(); |
912541b0 KS |
164 | udev_unref(udev); |
165 | if (err != 0) | |
1c0f62e3 KS |
166 | return EXIT_FAILURE; |
167 | return EXIT_SUCCESS; | |
f0083e3d | 168 | } |