d455b0085d
RUN="socket:<name>" will send the environment in the kernel uevent
format to the named destination. Using the socket instead of the program
to pass the hotplug events to the HAL daemon, cuts down the running
time of udevstart from 0.8 to 0.4 seconds on my box.
env -i ACTION=add DEVPATH=/block/hda/hda1 strace -s10000 ./udev block
sendto(3, "add@/block/hda/hda1\0
ACTION=add\0DEVPATH=/block/hda/hda1\0UDEV_LOG=3\0
ID_TYPE=disk\0ID_MODEL=HTS726060M9AT00\0ID_SERIAL=MRH401M4G6UM9B\0
ID_REVISION=MH4OA6BA\0ID_BUS=ata\0ID_PATH=pci-0000:00:1f.1-ide-0:0\0
ID_FS_USAGE=other\0ID_FS_TYPE=swap\0ID_FS_VERSION=2\0
ID_FS_UUID=9352cfef-7687-47bc-a2a3-34cf136f72e1\0
ID_FS_LABEL=ThisIsSwap\0ID_FS_LABEL_SAFE=ThisIsSwap\0
DEVNAME=/dev/hda1\0"
Signed-off-by: Kay Sievers <kay.sievers@suse.de>
140 lines
3.3 KiB
C
140 lines
3.3 KiB
C
/*
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* udev.c
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*
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* Copyright (C) 2003-2004 Greg Kroah-Hartman <greg@kroah.com>
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* Copyright (C) 2004-2005 Kay Sievers <kay.sievers@vrfy.org>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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#include <stdio.h>
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#include <stddef.h>
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#include <stdlib.h>
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#include <string.h>
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#include <fcntl.h>
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#include <ctype.h>
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#include <errno.h>
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#include <signal.h>
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#include <unistd.h>
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#include "libsysfs/sysfs/libsysfs.h"
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#include "udev_libc_wrapper.h"
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#include "udev.h"
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#include "udev_utils.h"
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#include "udev_sysfs.h"
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#include "udev_version.h"
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#include "udev_rules.h"
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#include "logging.h"
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#ifdef USE_LOG
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void log_message(int priority, const char *format, ...)
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{
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va_list args;
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if (priority > udev_log_priority)
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return;
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va_start(args, format);
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vsyslog(priority, format, args);
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va_end(args);
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}
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#endif
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static void asmlinkage sig_handler(int signum)
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{
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switch (signum) {
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case SIGALRM:
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exit(1);
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case SIGINT:
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case SIGTERM:
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exit(20 + signum);
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}
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}
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int main(int argc, char *argv[], char *envp[])
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{
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struct udevice udev;
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struct udev_rules rules;
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const char *action;
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const char *devpath;
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const char *subsystem;
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struct sigaction act;
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int retval = -EINVAL;
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if (argc == 2 && strcmp(argv[1], "-V") == 0) {
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printf("%s\n", UDEV_VERSION);
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exit(0);
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}
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logging_init("udev");
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udev_init_config();
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dbg("version %s", UDEV_VERSION);
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/* set signal handlers */
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memset(&act, 0x00, sizeof(act));
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act.sa_handler = (void (*)(int)) sig_handler;
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sigemptyset (&act.sa_mask);
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act.sa_flags = 0;
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sigaction(SIGALRM, &act, NULL);
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sigaction(SIGINT, &act, NULL);
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sigaction(SIGTERM, &act, NULL);
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/* trigger timeout to prevent hanging processes */
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alarm(UDEV_ALARM_TIMEOUT);
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action = getenv("ACTION");
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devpath = getenv("DEVPATH");
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subsystem = getenv("SUBSYSTEM");
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/* older kernels passed the SUBSYSTEM only as argument */
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if (!subsystem && argc == 2)
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subsystem = argv[1];
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if (!action || !subsystem || !devpath) {
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err("action, subsystem or devpath missing");
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goto exit;
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}
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/* export log_priority , as called programs may want to do the same as udev */
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if (udev_log_priority) {
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char priority[32];
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sprintf(priority, "%i", udev_log_priority);
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setenv("UDEV_LOG", priority, 1);
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}
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udev_init_device(&udev, devpath, subsystem, action);
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udev_rules_init(&rules, 0);
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retval = udev_process_event(&rules, &udev);
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if (!retval && udev_run && !list_empty(&udev.run_list)) {
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struct name_entry *name_loop;
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dbg("executing run list");
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list_for_each_entry(name_loop, &udev.run_list, node) {
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if (strncmp(name_loop->name, "socket:", strlen("socket:")) == 0)
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pass_env_to_socket(&name_loop->name[strlen("socket:")], devpath, action);
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else
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execute_program(name_loop->name, udev.subsystem, NULL, 0, NULL);
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}
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}
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udev_cleanup_device(&udev);
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exit:
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logging_close();
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return retval;
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}
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