#include <ctype.h>
#include <errno.h>
#include <signal.h>
+#include <unistd.h>
#include "libsysfs/sysfs/libsysfs.h"
#include "udev.h"
#include "udev_lib.h"
+#include "udev_sysfs.h"
#include "udev_version.h"
#include "logging.h"
#include "namedev.h"
#include "udevdb.h"
-/* global variables */
-char **main_argv;
-char **main_envp;
-
-/* local variables */
-static int is_udevstart;
#ifdef LOG
unsigned char logname[LOGNAME_SIZE];
}
#endif
-asmlinkage static void sig_handler(int signum)
+static void asmlinkage sig_handler(int signum)
{
switch (signum) {
+ case SIGALRM:
+ exit(1);
case SIGINT:
case SIGTERM:
- udevdb_exit();
exit(20 + signum);
- default:
- dbg("unhandled signal %d", signum);
}
}
-static char *subsystem_blacklist[] = {
- "scsi_host",
- "scsi_device",
- "usb_host",
- "pci_bus",
- "pcmcia_socket",
- ""
-};
-
-int __udev_hotplug(char *action, const char *devpath, const char *subsystem)
+int main(int argc, char *argv[], char *envp[])
{
- int retval = -EINVAL;
- int i;
struct sigaction act;
- const int nofake = 0;
+ struct sysfs_class_device *class_dev;
+ struct udevice udev;
+ char path[SYSFS_PATH_MAX];
+ int retval = -EINVAL;
+ enum {
+ ADD,
+ REMOVE,
+ UDEVSTART,
+ } act_type;
- dbg("looking at '%s'", devpath);
+ dbg("version %s", UDEV_VERSION);
+ logging_init("udev");
+ udev_init_config();
- /* we only care about class devices and block stuff */
- if (!strstr(devpath, "class") &&
- !strstr(devpath, "block")) {
- dbg("not a block or class device");
- goto exit;
- }
+ if (strstr(argv[0], "udevstart") || (argv[1] != NULL && strstr(argv[1], "udevstart"))) {
+ act_type = UDEVSTART;
+ } else {
+ const char *action = getenv("ACTION");
+ const char *devpath = getenv("DEVPATH");
+ const char *subsystem = argv[1];
- i = 0;
- while (subsystem_blacklist[i][0] != '\0') {
- if (strcmp(subsystem, subsystem_blacklist[i]) == 0) {
- dbg("don't care about '%s' devices", subsystem);
+ if (!action) {
+ dbg("no action?");
goto exit;
}
- i++;
- }
+ if (strcmp(action, "add") == 0) {
+ act_type = ADD;
+ } else if (strcmp(action, "remove") == 0) {
+ act_type = REMOVE;
+ } else {
+ dbg("no action '%s' for us", action);
+ goto exit;
+ }
+
+ if (!devpath) {
+ dbg("no devpath?");
+ goto exit;
+ }
+ dbg("looking at '%s'", devpath);
+
+ /* we only care about class devices and block stuff */
+ if (!strstr(devpath, "class") && !strstr(devpath, "block")) {
+ dbg("not a block or class device");
+ goto exit;
+ }
+
+ if (!subsystem) {
+ dbg("no subsystem");
+ goto exit;
+ }
+
+ udev_set_values(&udev, devpath, subsystem, action);
+
+ /* skip blacklisted subsystems */
+ if (udev.type != 'n' && subsystem_expect_no_dev(subsystem)) {
+ dbg("don't care about '%s' devices", subsystem);
+ goto exit;
+ };
- /* initialize udev database */
- retval = udevdb_init(UDEVDB_DEFAULT);
- if (retval != 0) {
- dbg("unable to initialize database");
- goto exit;
}
/* set signal handlers */
- act.sa_handler = sig_handler;
+ act.sa_handler = (void (*) (int))sig_handler;
sigemptyset (&act.sa_mask);
- act.sa_flags = SA_RESTART;
+ act.sa_flags = 0;
+ /* alarm must not restart syscalls*/
+ sigaction(SIGALRM, &act, NULL);
sigaction(SIGINT, &act, NULL);
sigaction(SIGTERM, &act, NULL);
- if (strcmp(action, "add") == 0) {
- /* Already done. */
- if (!is_udevstart)
- namedev_init();
- retval = udev_add_device(devpath, subsystem, nofake);
- goto action_done;
- }
+ /* trigger timout to interrupt blocking syscalls */
+ alarm(ALARM_TIMEOUT);
- if (strcmp(action, "remove") == 0) {
- retval = udev_remove_device(devpath, subsystem);
- goto action_done;
- }
+ switch(act_type) {
+ case UDEVSTART:
+ dbg("udevstart");
+ namedev_init();
+ retval = udev_start();
+ break;
+ case ADD:
+ dbg("udev add");
+
+ /* open the device */
+ snprintf(path, SYSFS_PATH_MAX, "%s%s", sysfs_path, udev.devpath);
+ class_dev = sysfs_open_class_device_path(path);
+ if (class_dev == NULL) {
+ dbg ("sysfs_open_class_device_path failed");
+ break;
+ }
+ dbg("opened class_dev->name='%s'", class_dev->name);
- dbg("unknown action '%s'", action);
- retval = -EINVAL;
+ /* init rules */
+ namedev_init();
-action_done:
- udevdb_exit();
+ /* name, create node, store in db */
+ retval = udev_add_device(&udev, class_dev);
-exit:
- return retval;
-}
+ /* run scripts */
+ dev_d_execute(&udev);
-static int udev_hotplug(void)
-{
- char *action;
- char *devpath;
- char *subsystem;
-
- action = get_action();
- if (!action) {
- dbg("no action?");
- return -EINVAL;
- }
+ sysfs_close_class_device(class_dev);
+ break;
+ case REMOVE:
+ dbg("udev remove");
- devpath = get_devpath();
- if (!devpath) {
- dbg("no devpath?");
- return -EINVAL;
- }
+ /* get node from db, delete it*/
+ retval = udev_remove_device(&udev);
- /* skip blacklisted subsystems */
- subsystem = get_subsystem(main_argv[1]);
- if (!subsystem) {
- dbg("no subsystem?");
- return -EINVAL;
+ /* run scripts */
+ dev_d_execute(&udev);
}
- return __udev_hotplug(action, devpath, subsystem);
-}
-
-int main(int argc, char *argv[], char *envp[])
-{
- main_argv = argv;
- main_envp = envp;
-
- if (strstr(argv[0], "udevstart"))
- is_udevstart = 1;
-
- /* initialize our configuration */
- udev_init_config();
-
- dbg("version %s", UDEV_VERSION);
-
- if (is_udevstart) {
- namedev_init();
- return udev_start();
- } else
- return udev_hotplug();
+exit:
+ logging_close();
+ return retval;
}
~ianmdlvl / elogind.git / blobdiff