X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=udev.c;h=116acf538976a070aadaff0ed30187e9dd506747;hp=1d66410b6c0085ba1c9c780497fb4f8f94b98bc1;hb=f1db055ab2e349ce22254562faaece66d6a4a873;hpb=d12ecb53cf8c5955135b94e4b671ad28dfb3a7b4

diff --git a/udev.c b/udev.c
index 1d66410b6..116acf538 100644
--- a/udev.c
+++ b/udev.c
@@ -29,6 +29,7 @@
 #include <errno.h>
 #include <ctype.h>
 #include <signal.h>
+#include <stdarg.h>
 
 #include "udev.h"
 #include "udev_version.h"
@@ -81,27 +82,78 @@ static inline char *get_seqnum(void)
 	return seqnum;
 }
 
-int main(int argc, char **argv, char **envp)
+static inline int udev_user(int argc, char **argv)
 {
-	char *action;
-	char *devpath;
-	char *subsystem;
+	static const char short_options[] = "q:rVh";
+	int option;
 	int retval = -EINVAL;
+	struct udevice dev;
 
-	signal(SIGINT, sig_handler);
-	signal(SIGTERM, sig_handler);
-	signal(SIGKILL, sig_handler);
+	while (1) {
+		option = getopt(argc, argv, short_options);
+		if (option == -1)
+			break;
 
-	main_argv = argv;
-	main_envp = envp;
+		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;
 
-	dbg("version %s", UDEV_VERSION);
+		case 'r':
+			printf("%s\n", udev_root);
+			return 0;
 
-	if (argc != 2) {
-		dbg ("unknown number of arguments");
-		goto exit;
+		case 'V':
+			printf("udev, version %s\n", UDEV_VERSION);
+			return 0;
+
+		case 'h':
+			retval = 0;
+		case '?':
+		default:
+			goto help;
+		}
 	}
 
+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");
+
+	return retval;
+}
+
+static char *subsystem_blacklist[] = {
+	"net",
+	"scsi_host",
+	"scsi_device",
+	"",
+};
+
+static inline int udev_hotplug(int argc, char **argv)
+{
+	char *action;
+	char *devpath;
+	char *subsystem;
+	int retval = -EINVAL;
+	int i;
+
 	subsystem = argv[1];
 
 	devpath = get_devpath();
@@ -118,10 +170,14 @@ 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 */
+	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();
@@ -130,9 +186,6 @@ int main(int argc, char **argv, char **envp)
 		goto exit;
 	}
 
-	/* initialize our configuration */
-	udev_init_config();
-
 	/* connect to the system message bus */
 	sysbus_connect();
 
@@ -143,6 +196,11 @@ int main(int argc, char **argv, char **envp)
 		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();
 
@@ -163,5 +221,32 @@ exit_sysbus:
 	sysbus_disconnect();
 
 exit:
+	if (retval > 0)
+		retval = 0;
+
+	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;
 }
+
+