X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=udev.c;h=90c34d800a9ca22533f276bf475cd7dc6a450e3a;hp=9f10cc212539466e5e03edc05016976d90069e24;hb=2410242aa4d21335026d3b90116078c9146a32f3;hpb=d026a35d747c0a993281408a9644ab843cf89fdd

diff --git a/udev.c b/udev.c
index 9f10cc212..90c34d800 100644
--- a/udev.c
+++ b/udev.c
@@ -20,30 +20,34 @@
  *
  */
 
+#include <stdio.h>
+#include <stddef.h>
 #include <stdlib.h>
 #include <string.h>
-#include <stdio.h>
-#include <errno.h>
 #include <ctype.h>
+#include <errno.h>
 #include <signal.h>
 
+#include "libsysfs/sysfs/libsysfs.h"
 #include "udev.h"
+#include "udev_lib.h"
 #include "udev_version.h"
-#include "udev_dbus.h"
 #include "logging.h"
 #include "namedev.h"
 #include "udevdb.h"
-#include "libsysfs/libsysfs.h"
 
 /* global variables */
 char **main_argv;
 char **main_envp;
 
+/* local variables */
+static int is_udevstart;
+
 #ifdef LOG
-unsigned char logname[42];
-void log_message (int level, const char *format, ...)
+unsigned char logname[LOGNAME_SIZE];
+void log_message(int level, const char *format, ...)
 {
-	va_list	args;
+	va_list args;
 
 	if (!udev_log)
 		return;
@@ -54,72 +58,34 @@ void log_message (int level, const char *format, ...)
 }
 #endif
 
-static void sig_handler(int signum)
+asmlinkage static void sig_handler(int signum)
 {
 	switch (signum) {
 		case SIGINT:
 		case SIGTERM:
-			sysbus_disconnect();
 			udevdb_exit();
 			exit(20 + signum);
 		default:
-			dbg("unhandled signal");
+			dbg("unhandled signal %d", signum);
 	}
 }
 
-static inline char *get_action(void)
-{
-	char *action;
-
-	action = getenv("ACTION");
-	return action;
-}
-
-static inline char *get_devpath(void)
-{
-	char *devpath;
-
-	devpath = getenv("DEVPATH");
-	return devpath;
-}
-
-static inline char *get_seqnum(void)
-{
-	char *seqnum;
-
-	seqnum = getenv("SEQNUM");
-	return seqnum;
-}
-
 static char *subsystem_blacklist[] = {
-	"net",
 	"scsi_host",
 	"scsi_device",
 	"usb_host",
 	"pci_bus",
-	"",
+	"pcmcia_socket",
+	""
 };
 
-static int udev_hotplug(int argc, char **argv)
+int __udev_hotplug(char *action, const char *devpath, const char *subsystem)
 {
-	char *action;
-	char *devpath;
-	char *subsystem;
 	int retval = -EINVAL;
 	int i;
 	struct sigaction act;
+	const int nofake = 0;
 
-	action = get_action();
-	if (!action) {
-		dbg ("no action?");
-		goto exit;
-	}
-
-	devpath = get_devpath();
-	if (!devpath) {
-		dbg ("no devpath?");
-		goto exit;
-	}
 	dbg("looking at '%s'", devpath);
 
 	/* we only care about class devices and block stuff */
@@ -129,8 +95,6 @@ static int udev_hotplug(int argc, char **argv)
 		goto exit;
 	}
 
-	/* skip blacklisted subsystems */
-	subsystem = argv[1];
 	i = 0;
 	while (subsystem_blacklist[i][0] != '\0') {
 		if (strcmp(subsystem, subsystem_blacklist[i]) == 0) {
@@ -140,61 +104,90 @@ static int udev_hotplug(int argc, char **argv)
 		i++;
 	}
 
-	/* connect to the system message bus */
-	sysbus_connect();
-
-	/* initialize our configuration */
-	udev_init_config();
-
 	/* initialize udev database */
 	retval = udevdb_init(UDEVDB_DEFAULT);
 	if (retval != 0) {
 		dbg("unable to initialize database");
-		goto exit_sysbus;
+		goto exit;
 	}
 
-	/* set up a default signal handler for now */
+	/* set signal handlers */
 	act.sa_handler = sig_handler;
 	sigemptyset (&act.sa_mask);
 	act.sa_flags = SA_RESTART;
 	sigaction(SIGINT, &act, NULL);
 	sigaction(SIGTERM, &act, NULL);
 
-	/* initialize the naming deamon */
-	namedev_init();
-
-	if (strcmp(action, "add") == 0)
-		retval = udev_add_device(devpath, subsystem);
+	if (strcmp(action, "add") == 0) {
+		/* Already done. */
+		if (!is_udevstart)
+			namedev_init();
+		retval = udev_add_device(devpath, subsystem, nofake);
+		goto action_done;
+	}
 
-	else if (strcmp(action, "remove") == 0)
+	if (strcmp(action, "remove") == 0) {
 		retval = udev_remove_device(devpath, subsystem);
-
-	else {
-		dbg("unknown action '%s'", action);
-		retval = -EINVAL;
+		goto action_done;
 	}
-	udevdb_exit();
 
-exit_sysbus:
-	/* disconnect from the system message bus */
-	sysbus_disconnect();
+	dbg("unknown action '%s'", action);
+	retval = -EINVAL;
+
+action_done:
+	udevdb_exit();
 
 exit:
-	if (retval > 0)
-		retval = 0;
+	return retval;
+}
+
+static int udev_hotplug(void)
+{
+	char *action;
+	char *devpath;
+	char *subsystem;
 
-	return -retval;
+	action = get_action();
+	if (!action) {
+		dbg("no action?");
+		return -EINVAL;
+	}
+
+	devpath = get_devpath();
+	if (!devpath) {
+		dbg("no devpath?");
+		return -EINVAL;
+	}
+
+	/* skip blacklisted subsystems */
+	subsystem = get_subsystem(main_argv[1]);
+	if (!subsystem) {
+		dbg("no subsystem?");
+		return -EINVAL;
+	}
+
+	return __udev_hotplug(action, devpath, subsystem);
 }
 
-int main(int argc, char **argv, char **envp)
+int main(int argc, char *argv[], char *envp[])
 {
 	main_argv = argv;
 	main_envp = envp;
 
-	init_logging("udev");
-	dbg("version %s", UDEV_VERSION);
+	if (strstr(argv[0], "udevstart")) {
+		/* Setup env variables. */
+		setenv("UDEV_NO_SLEEP", "1", 1);
+		is_udevstart = 1;
+	}
 
-	return udev_hotplug(argc, argv);
-}
+	/* initialize our configuration */
+	udev_init_config();
 
+	dbg("version %s", UDEV_VERSION);
 
+	if (is_udevstart) {
+		namedev_init();
+		return udev_start();
+	} else
+		return udev_hotplug();
+}