X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=udev.c;h=e6f2744fcbefe0826255550a0879e9f2f1c440a3;hp=1ac1c985076be16e6d1eab73fdd65d7b58cb7d33;hb=a551c7b0ceb72145a5256cdd53b0b52ff9f766de;hpb=f0083e3d4eb49e11fd7e37532dc64a6e6f5d4039

diff --git a/udev.c b/udev.c
index 1ac1c9850..e6f2744fc 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
@@ -21,63 +20,162 @@
  *
  */
 
+#include <stdio.h>
+#include <stddef.h>
 #include <stdlib.h>
 #include <string.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"
 
+/* global variables */
+char **main_argv;
+char **main_envp;
 
-static char *get_action(void)
+#ifdef LOG
+unsigned char logname[LOGNAME_SIZE];
+void log_message(int level, const char *format, ...)
 {
-	char *action;
-
-	action = getenv("ACTION");
-	return action;
-}
+	va_list args;
 
+	if (!udev_log)
+		return;
 
-/* yeah this should be dynamically allocated... */
-static char device[255];
+	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 *temp;
-
-	temp = getenv("DEVPATH");
-	if (temp == NULL)
-		return NULL;
-	strcpy(device, SYSFS_ROOT);
-	strcat(device, temp);
-
-	return device;
+	switch (signum) {
+		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 main(int argc, char *argv[])
+int main(int argc, char *argv[], char *envp[])
 {
-	char *subsystem;
+	main_argv = argv;
+	main_envp = envp;
+	struct sigaction act;
 	char *action;
-	char *dev;
-	
-	if (argc != 2) {
-		dbg ("unknown number of arguments");
-		return 1;
+	char *devpath = "";
+	char *subsystem = "";
+	int i;
+	int retval = -EINVAL;
+	enum {
+		ADD,
+		REMOVE,
+		UDEVSTART,
+	} act_type;
+
+	dbg("version %s", UDEV_VERSION);
+
+	/* initialize our configuration */
+	udev_init_config();
+
+	if (strstr(argv[0], "udevstart")) {
+		act_type = UDEVSTART;
+	} else {
+		action = get_action();
+		if (!action) {
+			dbg("no action?");
+			goto exit;
+		}
+		if (strcmp(action, "add") == 0) {
+			act_type = ADD;
+		} else if (strcmp(action, "remove") == 0) {
+			act_type = REMOVE;
+		} else {
+			dbg("unknown action '%s'", 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 */
+		if (!strstr(devpath, "class") && !strstr(devpath, "block")) {
+			dbg("not a block or class device");
+			goto exit;
+		}
+
+		subsystem = get_subsystem(main_argv[1]);
+		if (!subsystem) {
+			dbg("no subsystem?");
+			goto exit;
+		}
+
+		/* skip blacklisted subsystems */
+		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++;
+		}
 	}
 
-	subsystem = argv[1];
-
-	action = get_action();
-	if (!action) {
-		dbg ("no action?");
-		return 1;
+	/* 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 udev database */
+	if (udevdb_init(UDEVDB_DEFAULT) != 0) {
+		dbg("unable to initialize database");
+		goto exit;
 	}
 
-	dev = get_device();
-	if (!dev) {
-		dbg ("no device?");
-		return 1;
+	switch(act_type) {
+	case UDEVSTART:
+		dbg("udevstart");
+		namedev_init();
+		udev_sleep = 0;
+		retval = udev_start();
+		break;
+	case ADD:
+		dbg("udev add");
+		namedev_init();
+		retval = udev_add_device(devpath, subsystem, NOFAKE);
+		break;
+	case REMOVE:
+		dbg("udev remove");
+		retval = udev_remove_device(devpath, subsystem);
 	}
 
-	return 0;
-}
+	udevdb_exit();
 
+exit:
+	return retval;
+}