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.
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.
32 #include "udev_rules.h"
33 #include "udev_selinux.h"
36 void log_message(int priority
, const char *format
, ...)
40 if (priority
> udev_log_priority
)
43 va_start(args
, format
);
44 vsyslog(priority
, format
, args
);
49 static void asmlinkage
sig_handler(int signum
)
60 int main(int argc
, char *argv
[], char *envp
[])
62 struct sysfs_device
*dev
;
64 const char *maj
, *min
;
65 struct udev_rules rules
;
68 const char *subsystem
;
73 if (argc
== 2 && strcmp(argv
[1], "-V") == 0) {
74 printf("%s\n", UDEV_VERSION
);
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
);
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
)
93 err("open /dev/null failed: %s", strerror(errno
));
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
);
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)
117 if (action
== NULL
|| subsystem
== NULL
|| devpath
== NULL
) {
118 err("action, subsystem or devpath missing");
122 /* export log_priority , as called programs may want to do the same as udev */
123 if (udev_log_priority
) {
126 sprintf(priority
, "%i", udev_log_priority
);
127 setenv("UDEV_LOG", priority
, 1);
131 udev_rules_init(&rules
, 0);
133 dev
= sysfs_device_get(devpath
);
135 info("unable to open '%s'", devpath
);
139 udev
= udev_device_init(NULL
);
143 /* override built-in sysfs device */
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
));
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
);
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
);
176 udev_rules_cleanup(&rules
);