X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=udev.c;h=0d0a5da2074d22d1ab731831021da0570dd72946;hb=fb43c2b2e8aee09662226cb8ee8cb9ac93f32890;hp=a562bc27bea63ceb570598f4e2bed65300e6108f;hpb=f7b4eca455c7dbf850d984892756f22dbd9ddc3d;p=elogind.git

diff --git a/udev.c b/udev.c
index a562bc27b..0d0a5da20 100644
--- a/udev.c
+++ b/udev.c
@@ -27,9 +27,13 @@
 #include <fcntl.h>
 #include <unistd.h>
 #include <errno.h>
+#include <ctype.h>
+#include <signal.h>
+#include <stdarg.h>
 
 #include "udev.h"
 #include "udev_version.h"
+#include "udev_dbus.h"
 #include "namedev.h"
 #include "udevdb.h"
 #include "libsysfs/libsysfs.h"
@@ -38,13 +42,21 @@
 char **main_argv;
 char **main_envp;
 
-char sysfs_path[SYSFS_PATH_MAX];
-char *udev_config_dir = UDEV_CONFIG_DIR;
-char *udev_root = UDEV_ROOT;
-char udev_db_filename[PATH_MAX+NAME_MAX];
-char udev_config_permission_filename[PATH_MAX+NAME_MAX];
-char udev_config_filename[PATH_MAX+NAME_MAX];
-
+static void sig_handler(int signum)
+{
+	dbg("caught signal %d", signum);
+	switch (signum) {
+		case SIGINT:
+		case SIGTERM:
+		case SIGKILL:
+			sysbus_disconnect();
+			udevdb_exit();
+			exit(20 + signum);
+			break;
+		default:
+			dbg("unhandled signal");
+	}
+}
 
 static inline char *get_action(void)
 {
@@ -70,69 +82,69 @@ static inline char *get_seqnum(void)
 	return seqnum;
 }
 
-static void get_dirs(void)
+static inline int udev_user(int argc, char **argv)
 {
-	char *temp;
-	char *udev_db = UDEV_DB;
-	char *udev_config = UDEV_CONFIG_FILE;
-	char *udev_permission = UDEV_CONFIG_PERMISSION_FILE;
-	int retval;
-
-	retval = sysfs_get_mnt_path(sysfs_path, SYSFS_PATH_MAX);
-	if (retval)
-		dbg("sysfs_get_mnt_path failed");
-
-	/* see if we should try to override any of the default values */
-	temp = getenv("UDEV_TEST");
-	if (temp != NULL) {
-		/* hm testing is happening, use the specified values, if they are present */
-		temp = getenv("SYSFS_PATH");
-		if (temp)
-			strncpy(sysfs_path, temp, sizeof(sysfs_path));
-		temp = getenv("UDEV_CONFIG_DIR");
-		if (temp)
-			udev_config_dir = temp;
-		temp = getenv("UDEV_ROOT");
-		if (temp)
-			udev_root = temp;
-		temp = getenv("UDEV_DB");
-		if (temp)
-			udev_db = temp;
-		temp = getenv("UDEV_CONFIG_FILE");
-		if (temp)
-			udev_config = temp;
-		temp = getenv("UDEV_PERMISSION_FILE");
-		if (temp)
-			udev_permission = temp;
+	static const char short_options[] = "q:rVh";
+	int option;
+	int retval = -EINVAL;
+	struct udevice dev;
+
+	while (1) {
+		option = getopt(argc, argv, short_options);
+		if (option == -1)
+			break;
+
+		dbg("option '%c'", option);
+		switch (option) {
+		case 'q':
+			dbg("udev query: %s\n", optarg);
+			retval = udevdb_open_ro();
+			if (retval != 0) {
+				printf("unable to open udev database\n");
+				return -1;
+			}
+			retval = udevdb_get_dev(optarg, &dev);
+			if (retval == 0) {
+				printf("%s\n", dev.name);
+			} else {
+				printf("device not found in udev database\n");
+			}
+			udevdb_exit();
+			return retval;
+
+		case 'r':
+			printf("%s\n", udev_root);
+			return 0;
+
+		case 'V':
+			printf("udev, version %s\n", UDEV_VERSION);
+			return 0;
+
+		case 'h':
+			retval = 0;
+		case '?':
+		default:
+			goto help;
+		}
 	}
-	dbg("sysfs_path='%s'", sysfs_path);
 
-	strncpy(udev_db_filename, udev_config_dir, sizeof(udev_db_filename));
-	strncat(udev_db_filename, udev_db, sizeof(udev_db_filename));
+help:
+	printf("Usage: [-qrVh]\n"
+	       "  -q <path>  query database for the name of the created node\n"
+	       "  -r         print udev root\n"
+	       "  -V         print udev version\n"
+	       "  -h         print this help text\n"
+	       "\n");
 
-	strncpy(udev_config_filename, udev_config_dir, sizeof(udev_config_filename));
-	strncat(udev_config_filename, udev_config, sizeof(udev_config_filename));
-	
-	strncpy(udev_config_permission_filename, udev_config_dir, sizeof(udev_config_permission_filename));
-	strncat(udev_config_permission_filename, udev_permission, sizeof(udev_config_permission_filename));
+	return retval;
 }
 
-int main(int argc, char **argv, char **envp)
+static inline int udev_hotplug(int argc, char **argv)
 {
 	char *action;
 	char *devpath;
 	char *subsystem;
 	int retval = -EINVAL;
-	
-	main_argv = argv;
-	main_envp = envp;
-
-	dbg("version %s", UDEV_VERSION);
-
-	if (argc != 2) {
-		dbg ("unknown number of arguments");
-		goto exit;
-	}
 
 	subsystem = argv[1];
 
@@ -162,14 +174,21 @@ int main(int argc, char **argv, char **envp)
 		goto exit;
 	}
 
+	/* connect to the system message bus */
+	sysbus_connect();
+
 	/* initialize udev database */
-	get_dirs();
 	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);
+	signal(SIGKILL, sig_handler);
+
 	/* initialize the naming deamon */
 	namedev_init();
 
@@ -185,6 +204,34 @@ int main(int argc, char **argv, char **envp)
 	}
 	udevdb_exit();
 
-exit:	
+exit_sysbus:
+	/* disconnect from the system message bus */
+	sysbus_disconnect();
+
+exit:
+	return retval;
+}
+
+int main(int argc, char **argv, char **envp)
+{
+	main_argv = argv;
+	main_envp = envp;
+	int retval;
+
+	dbg("version %s", UDEV_VERSION);
+
+	/* initialize our configuration */
+	udev_init_config();
+
+	if (argc == 2 && argv[1][0] != '-') {
+		dbg("called by hotplug");
+		retval = udev_hotplug(argc, argv);
+	} else {
+		dbg("called by user");
+		retval = udev_user(argc, argv);
+	}
+
 	return retval;
 }
+
+