X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=udev.c;h=0ef4cf8657f17d79e0bf3628fb7a5ec15e7ff8c6;hp=0aba8c4bf9aa133999dedb8b8e209d078593aaf3;hb=eb6c7cd03635ffc28798734f0b87b9e21dae6f9e;hpb=c27e69116d3ef0ea069a3c5146009ced08a0238b

diff --git a/udev.c b/udev.c
index 0aba8c4bf..0ef4cf865 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
@@ -21,106 +20,171 @@
  *
  */
 
+#include <stdio.h>
+#include <stddef.h>
 #include <stdlib.h>
 #include <string.h>
-#include <stdio.h>
-#include <fcntl.h>
-#include <unistd.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 "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;
 
-static char *get_action(void)
+#ifdef LOG
+unsigned char logname[LOGNAME_SIZE];
+void log_message(int level, const char *format, ...)
 {
-	char *action;
+	va_list args;
 
-	action = getenv("ACTION");
-	return action;
-}
+	if (!udev_log)
+		return;
 
+	va_start(args, format);
+	vsyslog(level, format, args);
+	va_end(args);
+}
+#endif
 
-static char *get_device(void)
+asmlinkage static void sig_handler(int signum)
 {
-	char *device;
-
-	device = getenv("DEVPATH");
-	return device;
+	switch (signum) {
+		case SIGINT:
+		case SIGTERM:
+			udevdb_exit();
+			exit(20 + signum);
+		default:
+			dbg("unhandled signal %d", signum);
+	}
 }
 
-char **main_argv;
-char **main_envp;
+static char *subsystem_blacklist[] = {
+	"scsi_host",
+	"scsi_device",
+	"usb_host",
+	"pci_bus",
+	"pcmcia_socket",
+	""
+};
 
-int main(int argc, char **argv, char **envp)
+int __udev_hotplug(char *action, const char *devpath, const char *subsystem)
 {
-	char *action;
-	char *device;
-	char *subsystem;
 	int retval = -EINVAL;
-	
-	main_argv = argv;
-	main_envp = envp;
+	int i;
+	struct sigaction act;
+	const int nofake = 0;
 
-	if (argc != 2) {
-		dbg ("unknown number of arguments");
+	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;
 	}
 
-	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++;
+	}
 
-	device = get_device();
-	if (!device) {
-		dbg ("no device?");
+	/* initialize udev database */
+	retval = udevdb_init(UDEVDB_DEFAULT);
+	if (retval != 0) {
+		dbg("unable to initialize database");
 		goto exit;
 	}
-	dbg("looking at %s", device);
 
-	/* we only care about class devices and block stuff */
-	if (!strstr(device, "class") &&
-	    !strstr(device, "block")) {
-		dbg("not block or class");
-		goto exit;
+	/* 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);
+
+	if (strcmp(action, "add") == 0) {
+		/* Already done. */
+		if (!is_udevstart)
+			namedev_init();
+		retval = udev_add_device(devpath, subsystem, nofake);
+		goto action_done;
 	}
 
-	/* but we don't care about net class devices */
-	if (strcmp(subsystem, "net") == 0) {
-		dbg("don't care about net devices");
-		goto exit;
+	if (strcmp(action, "remove") == 0) {
+		retval = udev_remove_device(devpath, subsystem);
+		goto action_done;
 	}
 
+	dbg("unknown action '%s'", action);
+	retval = -EINVAL;
+
+action_done:
+	udevdb_exit();
+
+exit:
+	return retval;
+}
+
+static int udev_hotplug(void)
+{
+	char *action;
+	char *devpath;
+	char *subsystem;
+
 	action = get_action();
 	if (!action) {
-		dbg ("no action?");
-		goto exit;
+		dbg("no action?");
+		return -EINVAL;
 	}
 
-	/* initialize udev database */
-	retval = udevdb_init(UDEVDB_DEFAULT);
-	if (retval != 0) {
-		dbg("Unable to initialize database.");
-		goto exit;
+	devpath = get_devpath();
+	if (!devpath) {
+		dbg("no devpath?");
+		return -EINVAL;
 	}
 
-	/* initialize the naming deamon */
-	namedev_init();
+	/* skip blacklisted subsystems */
+	subsystem = get_subsystem(main_argv[1]);
+	if (!subsystem) {
+		dbg("no subsystem?");
+		return -EINVAL;
+	}
 
-	if (strcmp(action, "add") == 0)
-		retval = udev_add_device(device, argv[1]);
+	return __udev_hotplug(action, devpath, subsystem);
+}
 
-	else if (strcmp(action, "remove") == 0)
-		retval = udev_remove_device(device, argv[1]);
+int main(int argc, char *argv[], char *envp[])
+{
+	main_argv = argv;
+	main_envp = envp;
 
-	else {
-		dbg("Unknown action: %s", action);
-		retval = -EINVAL;
-	}
-	udevdb_exit();
+	if (strstr(argv[0], "udevstart"))
+		is_udevstart = 1;
 
-exit:	
-	return retval;
-}
+	/* initialize our configuration */
+	udev_init_config();
+
+	dbg("version %s", UDEV_VERSION);
 
+	if (is_udevstart) {
+		namedev_init();
+		return udev_start();
+	} else
+		return udev_hotplug();
+}