X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=udev.c;h=36ff21d5b71c0ef231e325fb8ca4e728994b2bc4;hp=8ce813fbf516cffdfba0fdece3f73abd35ee9459;hb=c9b8dbfb652a10d2f1c1b122a3806c21cab87ab4;hpb=e6764498e7592f216a1895eacc485448fa4a1660

diff --git a/udev.c b/udev.c
index 8ce813fbf..36ff21d5b 100644
--- a/udev.c
+++ b/udev.c
@@ -37,53 +37,23 @@
 #include "udev_utils.h"
 #include "udev_sysfs.h"
 #include "udev_version.h"
-#include "namedev.h"
+#include "udev_rules.h"
 #include "logging.h"
 
-
 #ifdef USE_LOG
-void log_message(int level, const char *format, ...)
+void log_message(int priority, const char *format, ...)
 {
 	va_list args;
 
-	if (!udev_log)
+	if (priority > udev_log_priority)
 		return;
 
 	va_start(args, format);
-	vsyslog(level, format, args);
+	vsyslog(priority, format, args);
 	va_end(args);
 }
 #endif
 
-/* decide if we should manage the whole hotplug event
- * for now look if the kernel calls udevsend instead of /sbin/hotplug
- */
-static int manage_hotplug_event(void) {
-	char helper[256];
-	int fd;
-	int len;
-
-	/* don't handle hotplug.d if we are called directly */
-	if (!getenv("UDEVD_EVENT"))
-		return 0;
-
-	fd = open("/proc/sys/kernel/hotplug", O_RDONLY);
-	if (fd < 0)
-		return 0;
-
-	len = read(fd, helper, 256);
-	close(fd);
-
-	if (len < 0)
-		return 0;
-	helper[len] = '\0';
-
-	if (strstr(helper, "udevsend"))
-		return 1;
-
-	return 0;
-}
-
 static void asmlinkage sig_handler(int signum)
 {
 	switch (signum) {
@@ -97,15 +67,12 @@ static void asmlinkage sig_handler(int signum)
 
 int main(int argc, char *argv[], char *envp[])
 {
-	struct sysfs_class_device *class_dev;
-	struct sysfs_device *devices_dev;
 	struct udevice udev;
 	char path[PATH_SIZE];
 	const char *error;
 	const char *action;
 	const char *devpath;
 	const char *subsystem;
-	int managed_event;
 	struct sigaction act;
 	int retval = -EINVAL;
 
@@ -115,13 +82,12 @@ int main(int argc, char *argv[], char *envp[])
 	}
 
 	logging_init("udev");
-	dbg("version %s", UDEV_VERSION);
-
 	udev_init_config();
+	dbg("version %s", UDEV_VERSION);
 
 	/* set signal handlers */
 	memset(&act, 0x00, sizeof(act));
-	act.sa_handler = (void (*) (int))sig_handler;
+	act.sa_handler = (void (*)(int)) sig_handler;
 	sigemptyset (&act.sa_mask);
 	act.sa_flags = 0;
 	sigaction(SIGALRM, &act, NULL);
@@ -131,11 +97,6 @@ int main(int argc, char *argv[], char *envp[])
 	/* trigger timeout to prevent hanging processes */
 	alarm(ALARM_TIMEOUT);
 
-	/* let the executed programs know if we handle the whole hotplug event */
-	managed_event = manage_hotplug_event();
-	if (managed_event)
-		setenv("MANAGED_EVENT", "1", 1);
-
 	action = getenv("ACTION");
 	devpath = getenv("DEVPATH");
 	subsystem = getenv("SUBSYSTEM");
@@ -143,95 +104,123 @@ int main(int argc, char *argv[], char *envp[])
 	if (!subsystem && argc == 2)
 		subsystem = argv[1];
 
-	udev_init_device(&udev, devpath, subsystem);
-
 	if (!action || !subsystem || !devpath) {
-		dbg("action, subsystem or devpath missing");
-		goto hotplug;
+		err("action, subsystem or devpath missing");
+		goto exit;
+	}
+
+	/* export log_priority , as called programs may want to do the same as udev */
+	if (udev_log_priority) {
+		char priority[32];
+
+		sprintf(priority, "%i", udev_log_priority);
+		setenv("UDEV_LOG", priority, 1);
 	}
 
-	/* export logging flag, as called scripts may want to do the same as udev */
-	if (udev_log)
-		setenv("UDEV_LOG", "1", 1);
+	udev_init_device(&udev, devpath, subsystem, action);
+	udev_rules_init();
 
 	if (udev.type == DEV_BLOCK || udev.type == DEV_CLASS || udev.type == DEV_NET) {
+		/* handle device node */
 		if (strcmp(action, "add") == 0) {
-			/* wait for sysfs and possibly add node */
-			dbg("udev add");
-
-			/* skip subsystems without "dev", but handle net devices */
-			if (udev.type != DEV_NET && subsystem_expect_no_dev(udev.subsystem)) {
-				dbg("don't care about '%s' devices", udev.subsystem);
-				goto hotplug;
-			}
+			struct sysfs_class_device *class_dev;
 
+			/* wait for sysfs of /sys/class /sys/block */
+			dbg("node add");
 			snprintf(path, sizeof(path), "%s%s", sysfs_path, udev.devpath);
 			path[sizeof(path)-1] = '\0';
 			class_dev = wait_class_device_open(path);
 			if (class_dev == NULL) {
-				dbg ("open class device failed");
-				goto hotplug;
+				dbg("open class device failed");
+				goto run;
 			}
 			dbg("opened class_dev->name='%s'", class_dev->name);
-
 			wait_for_class_device(class_dev, &error);
 
-			/* init rules */
-			namedev_init();
-
-			/* name, create node, store in db */
-			retval = udev_add_device(&udev, class_dev);
-
+			/* get major/minor */
+			if (udev.type == DEV_BLOCK || udev.type == DEV_CLASS)
+				udev.devt = get_devt(class_dev);
+
+			if (udev.type == DEV_NET || udev.devt) {
+				/* name device */
+				udev_rules_get_name(&udev, class_dev);
+				if (udev.ignore_device) {
+					info("device event will be ignored");
+					goto cleanup;
+				}
+				if (udev.name[0] == '\0') {
+					info("device node creation supressed");
+					goto cleanup;
+				}
+				
+				/* create node, store in db */
+				retval = udev_add_device(&udev, class_dev);
+			} else {
+				dbg("no dev-file found");
+				udev_rules_get_run(&udev, NULL);
+				if (udev.ignore_device) {
+					info("device event will be ignored");
+					goto cleanup;
+				}
+			}
 			sysfs_close_class_device(class_dev);
 		} else if (strcmp(action, "remove") == 0) {
-			/* possibly remove a node */
-			dbg("udev remove");
-
-			/* skip subsystems without "dev" */
-			if (subsystem_expect_no_dev(udev.subsystem)) {
-				dbg("don't care about '%s' devices", udev.subsystem);
-				goto hotplug;
+			dbg("node remove");
+			udev_rules_get_run(&udev, NULL);
+			if (udev.ignore_device) {
+				dbg("device event will be ignored");
+				goto cleanup;
 			}
 
-			/* get node from db, remove db-entry, delete created node */
+			/* get name from db, remove db-entry, delete node */
 			retval = udev_remove_device(&udev);
 		}
 
-		/* run dev.d/ scripts if we created/deleted a node or changed a netif name */
-		if (udev.devname[0] != '\0') {
+		/* export name of device node or netif */
+		if (udev.devname[0] != '\0')
 			setenv("DEVNAME", udev.devname, 1);
-			if (udev_dev_d)
-				udev_multiplex_directory(&udev, DEVD_DIR, DEVD_SUFFIX);
+	} else if (udev.type == DEV_DEVICE && strcmp(action, "add") == 0) {
+		struct sysfs_device *devices_dev;
+
+		/* wait for sysfs of /sys/devices/ */
+		dbg("devices add");
+		snprintf(path, sizeof(path), "%s%s", sysfs_path, devpath);
+		path[sizeof(path)-1] = '\0';
+		devices_dev = wait_devices_device_open(path);
+		if (!devices_dev) {
+			dbg("devices device unavailable (probably remove has beaten us)");
+			goto run;
 		}
-	} else if (udev.type == DEV_DEVICE) {
-		if (strcmp(action, "add") == 0) {
-			/* wait for sysfs */
-			dbg("devices add");
-
-			snprintf(path, sizeof(path), "%s%s", sysfs_path, devpath);
-			path[sizeof(path)-1] = '\0';
-			devices_dev = wait_devices_device_open(path);
-			if (!devices_dev) {
-				dbg("devices device unavailable (probably remove has beaten us)");
-				goto hotplug;
-			}
-			dbg("devices device opened '%s'", path);
-
-			wait_for_devices_device(devices_dev, &error);
-
-			sysfs_close_device(devices_dev);
-		} else if (strcmp(action, "remove") == 0) {
-			dbg("devices remove");
+		dbg("devices device opened '%s'", path);
+		wait_for_devices_device(devices_dev, &error);
+		udev_rules_get_run(&udev, devices_dev);
+		sysfs_close_device(devices_dev);
+		if (udev.ignore_device) {
+			info("device event will be ignored");
+			goto cleanup;
 		}
 	} else {
-		dbg("unhandled");
+		dbg("default handling");
+		udev_rules_get_run(&udev, NULL);
+		if (udev.ignore_device) {
+			info("device event will be ignored");
+			goto cleanup;
+		}
+	}
+
+run:
+	if (udev_run && !list_empty(&udev.run_list)) {
+		struct name_entry *name_loop;
+
+		dbg("executing run list");
+		list_for_each_entry(name_loop, &udev.run_list, node)
+			execute_command(name_loop->name, udev.subsystem);
 	}
 
-hotplug:
+cleanup:
 	udev_cleanup_device(&udev);
-	if (udev_hotplug_d && managed_event)
-		udev_multiplex_directory(&udev, HOTPLUGD_DIR, HOTPLUG_SUFFIX);
 
+exit:
 	logging_close();
 	return retval;
 }