Merge branch 'VLAN-MultiSSID' into Toastman-VLAN
[tomato.git] / release / src / router / udev / test-udev.c
blobba3601591146bc8f810c6a08234e46b3510083c7
1 /*
2 * Copyright (C) 2003-2004 Greg Kroah-Hartman <greg@kroah.com>
3 * Copyright (C) 2004-2006 Kay Sievers <kay.sievers@vrfy.org>
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation version 2 of the License.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
20 #include <stdio.h>
21 #include <stddef.h>
22 #include <stdlib.h>
23 #include <string.h>
24 #include <fcntl.h>
25 #include <ctype.h>
26 #include <errno.h>
27 #include <signal.h>
28 #include <unistd.h>
29 #include <syslog.h>
31 #include "udev.h"
32 #include "udev_rules.h"
33 #include "udev_selinux.h"
35 #ifdef USE_LOG
36 void log_message(int priority, const char *format, ...)
38 va_list args;
40 if (priority > udev_log_priority)
41 return;
43 va_start(args, format);
44 vsyslog(priority, format, args);
45 va_end(args);
47 #endif
49 static void asmlinkage sig_handler(int signum)
51 switch (signum) {
52 case SIGALRM:
53 exit(1);
54 case SIGINT:
55 case SIGTERM:
56 exit(20 + signum);
60 int main(int argc, char *argv[], char *envp[])
62 struct sysfs_device *dev;
63 struct udevice *udev;
64 const char *maj, *min;
65 struct udev_rules rules;
66 const char *action;
67 const char *devpath;
68 const char *subsystem;
69 struct sigaction act;
70 int devnull;
71 int retval = -EINVAL;
73 if (argc == 2 && strcmp(argv[1], "-V") == 0) {
74 printf("%s\n", UDEV_VERSION);
75 exit(0);
78 /* set std fd's to /dev/null, /sbin/hotplug forks us, we don't have them at all */
79 devnull = open("/dev/null", O_RDWR);
80 if (devnull >= 0) {
81 if (devnull != STDIN_FILENO)
82 dup2(devnull, STDIN_FILENO);
83 if (devnull != STDOUT_FILENO)
84 dup2(devnull, STDOUT_FILENO);
85 if (devnull != STDERR_FILENO)
86 dup2(devnull, STDERR_FILENO);
87 if (devnull > STDERR_FILENO)
88 close(devnull);
91 logging_init("udev");
92 if (devnull < 0)
93 err("open /dev/null failed: %s", strerror(errno));
94 udev_config_init();
95 selinux_init();
96 dbg("version %s", UDEV_VERSION);
98 /* set signal handlers */
99 memset(&act, 0x00, sizeof(act));
100 act.sa_handler = (void (*)(int)) sig_handler;
101 sigemptyset (&act.sa_mask);
102 act.sa_flags = 0;
103 sigaction(SIGALRM, &act, NULL);
104 sigaction(SIGINT, &act, NULL);
105 sigaction(SIGTERM, &act, NULL);
107 /* trigger timeout to prevent hanging processes */
108 alarm(UDEV_ALARM_TIMEOUT);
110 action = getenv("ACTION");
111 devpath = getenv("DEVPATH");
112 subsystem = getenv("SUBSYSTEM");
113 /* older kernels passed the SUBSYSTEM only as argument */
114 if (subsystem == NULL && argc == 2)
115 subsystem = argv[1];
117 if (action == NULL || subsystem == NULL || devpath == NULL) {
118 err("action, subsystem or devpath missing");
119 goto exit;
122 /* export log_priority , as called programs may want to do the same as udev */
123 if (udev_log_priority) {
124 char priority[32];
126 sprintf(priority, "%i", udev_log_priority);
127 setenv("UDEV_LOG", priority, 1);
130 sysfs_init();
131 udev_rules_init(&rules, 0);
133 dev = sysfs_device_get(devpath);
134 if (dev == NULL) {
135 info("unable to open '%s'", devpath);
136 goto fail;
139 udev = udev_device_init(NULL);
140 if (udev == NULL)
141 goto fail;
143 /* override built-in sysfs device */
144 udev->dev = dev;
145 strlcpy(udev->action, action, sizeof(udev->action));
147 /* get dev_t from environment, which is needed for "remove" to work, "add" works also from sysfs */
148 maj = getenv("MAJOR");
149 min = getenv("MINOR");
150 if (maj != NULL && min != NULL)
151 udev->devt = makedev(atoi(maj), atoi(min));
152 else
153 udev->devt = udev_device_get_devt(udev);
155 retval = udev_device_event(&rules, udev);
157 if (retval == 0 && !udev->ignore_device && udev_run) {
158 struct name_entry *name_loop;
160 dbg("executing run list");
161 list_for_each_entry(name_loop, &udev->run_list, node) {
162 if (strncmp(name_loop->name, "socket:", strlen("socket:")) == 0)
163 pass_env_to_socket(&name_loop->name[strlen("socket:")], devpath, action);
164 else {
165 char program[PATH_SIZE];
167 strlcpy(program, name_loop->name, sizeof(program));
168 udev_rules_apply_format(udev, program, sizeof(program));
169 run_program(program, udev->dev->subsystem, NULL, 0, NULL, (udev_log_priority >= LOG_INFO));
174 udev_device_cleanup(udev);
175 fail:
176 udev_rules_cleanup(&rules);
177 sysfs_cleanup();
178 selinux_exit();
180 exit:
181 logging_close();
182 if (retval != 0)
183 return 1;
184 return 0;