X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=udev.c;h=38b26916c99a63eb1774b5bb41e8c3361363e683;hp=67b86e5916ced757a921bbbd442bee3e876c6298;hb=35b7d88c0dab4c1104c127ddd644db22307949c9;hpb=5aebfbcb62614fc2bf2b1579d62e3fe272c6751a

diff --git a/udev.c b/udev.c
index 67b86e591..38b26916c 100644
--- a/udev.c
+++ b/udev.c
@@ -3,8 +3,7 @@
  *
  * Userspace devfs
  *
- * Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com>
- *
+ * Copyright (C) 2003,2004 Greg Kroah-Hartman <greg@kroah.com>
  *
  *	This program is free software; you can redistribute it and/or modify it
  *	under the terms of the GNU General Public License as published by the
@@ -24,13 +23,14 @@
 #include <stdlib.h>
 #include <string.h>
 #include <stdio.h>
-#include <fcntl.h>
-#include <unistd.h>
 #include <errno.h>
 #include <ctype.h>
+#include <signal.h>
 
 #include "udev.h"
 #include "udev_version.h"
+#include "udev_dbus.h"
+#include "logging.h"
 #include "namedev.h"
 #include "udevdb.h"
 #include "libsysfs/libsysfs.h"
@@ -39,6 +39,21 @@
 char **main_argv;
 char **main_envp;
 
+static void sig_handler(int signum)
+{
+	dbg("caught signal %d", signum);
+	switch (signum) {
+		case SIGINT:
+		case SIGTERM:
+			sysbus_disconnect();
+			udevdb_exit();
+			exit(20 + signum);
+			break;
+		default:
+			dbg("unhandled signal");
+	}
+}
+
 static inline char *get_action(void)
 {
 	char *action;
@@ -63,79 +78,29 @@ static inline char *get_seqnum(void)
 	return seqnum;
 }
 
-#ifdef USE_DBUS
-
-/** Global variable for the connection the to system message bus or #NULL
- *  if we cannot connect or acquire the org.kernel.udev service
- */
-DBusConnection* sysbus_connection;
-
-/** Disconnect from the system message bus */
-static void sysbus_disconnect()
-{
-        if (sysbus_connection == NULL)
-                return;
-
-        dbus_connection_disconnect(sysbus_connection);
-        sysbus_connection = NULL;
-}
-
-/** Connect to the system message bus */
-static void sysbus_connect()
-{
-        DBusError error;
-
-        /* Connect to a well-known bus instance, the system bus */
-        dbus_error_init(&error);
-        sysbus_connection = dbus_bus_get(DBUS_BUS_SYSTEM, &error);
-        if (sysbus_connection == NULL) {
-                dbg("cannot connect to system message bus, error %s: %s", 
-                    error.name, error.message);
-                dbus_error_free(&error);
-                return;
-        }
-
-        /*  Acquire the org.kernel.udev service such that listeners
-         *  know that the message is really from us and not from a
-         *  random attacker. See the file udev_sysbus_policy.conf for
-         *  details.
-         *
-         *  Note that a service can have multiple owners (though there
-         *  is a concept of a primary owner for reception of messages)
-         *  so no race is introduced if two copies of udev is running
-         *  at the same time.
-         */
-        dbus_bus_acquire_service(sysbus_connection, "org.kernel.udev", 0, 
-                                 &error);
-        if (dbus_error_is_set(&error)) {
-                printf("cannot acquire org.kernel.udev service, error %s: %s'",
-                       error.name, error.message);
-                sysbus_disconnect();
-                return;
-        }
-}
-
-#endif /* USE_DBUS */
+static char *subsystem_blacklist[] = {
+	"net",
+	"scsi_host",
+	"scsi_device",
+	"usb_host",
+	"pci_bus",
+	"",
+};
 
-int main(int argc, char **argv, char **envp)
+static int udev_hotplug(int argc, char **argv)
 {
 	char *action;
 	char *devpath;
 	char *subsystem;
 	int retval = -EINVAL;
-	
-	main_argv = argv;
-	main_envp = envp;
+	int i;
 
-	dbg("version %s", UDEV_VERSION);
-
-	if (argc != 2) {
-		dbg ("unknown number of arguments");
+	action = get_action();
+	if (!action) {
+		dbg ("no action?");
 		goto exit;
 	}
 
-	subsystem = argv[1];
-
 	devpath = get_devpath();
 	if (!devpath) {
 		dbg ("no devpath?");
@@ -150,33 +115,34 @@ int main(int argc, char **argv, char **envp)
 		goto exit;
 	}
 
-	/* but we don't care about net class devices */
-	if (strcmp(subsystem, "net") == 0) {
-		dbg("don't care about net devices");
-		goto exit;
+	/* skip blacklisted subsystems */
+	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);
+			goto exit;
+		}
+		i++;
 	}
 
-	action = get_action();
-	if (!action) {
-		dbg ("no action?");
-		goto exit;
-	}
+	/* connect to the system message bus */
+	sysbus_connect();
 
 	/* initialize our configuration */
 	udev_init_config();
 
-#ifdef USE_DBUS
-        /* connect to the system message bus */
-        sysbus_connect();
-#endif /* USE_DBUS */
-
 	/* initialize udev database */
 	retval = udevdb_init(UDEVDB_DEFAULT);
 	if (retval != 0) {
 		dbg("unable to initialize database");
-		goto exit;
+		goto exit_sysbus;
 	}
 
+	/* set up a default signal handler for now */
+	signal(SIGINT, sig_handler);
+	signal(SIGTERM, sig_handler);
+
 	/* initialize the naming deamon */
 	namedev_init();
 
@@ -192,11 +158,25 @@ int main(int argc, char **argv, char **envp)
 	}
 	udevdb_exit();
 
-#ifdef USE_DBUS
-        /* disconnect from the system message bus */
-        sysbus_disconnect();
-#endif /* USE_DBUS */
+exit_sysbus:
+	/* disconnect from the system message bus */
+	sysbus_disconnect();
+
+exit:
+	if (retval > 0)
+		retval = 0;
 
-exit:	
-	return retval;
+	return -retval;
 }
+
+int main(int argc, char **argv, char **envp)
+{
+	main_argv = argv;
+	main_envp = envp;
+
+	dbg("version %s", UDEV_VERSION);
+
+	return udev_hotplug(argc, argv);
+}
+
+