X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=udevinfo.c;h=0551eb2e3287ae1cf2efbe6c4d8d29687f805611;hb=77ab93ed972d3a83d8f48d434c7e28153ae6dab6;hp=5445b0fcc13e0ad1e6463a9b8439490e0afada35;hpb=492e76c9c1108a28eae356cc8bd7955ccf234980;p=elogind.git

diff --git a/udevinfo.c b/udevinfo.c
index 5445b0fcc..0551eb2e3 100644
--- a/udevinfo.c
+++ b/udevinfo.c
@@ -104,6 +104,10 @@ static int print_device_chain(const char *devpath)
 {
 	struct sysfs_device *dev;
 
+	dev = sysfs_device_get(devpath);
+	if (dev == NULL)
+		return -1;
+
 	printf("\n"
 	       "Udevinfo starts with the device specified by the devpath and then\n"
 	       "walks up the chain of parent devices. It prints for every device\n"
@@ -112,10 +116,6 @@ static int print_device_chain(const char *devpath)
 	       "and the attributes from one single parent device.\n"
 	       "\n");
 
-	dev = sysfs_device_get(devpath);
-	if (dev == NULL)
-		return -1;
-
 	printf("  looking at device '%s':\n", dev->devpath);
 	printf("    KERNEL==\"%s\"\n", dev->kernel);
 	printf("    SUBSYSTEM==\"%s\"\n", dev->subsystem);
@@ -308,7 +308,7 @@ int main(int argc, char *argv[], char *envp[])
 			       "  --root            prepend to query result or print udev_root\n"
 			       "  --attribute-walk  print all SYSFS_attributes along the device chain\n"
 			       "  --export-db       export the content of the udev database\n"
-			       "  --verision        print udev version\n"
+			       "  --version        print udev version\n"
 			       "  --help            print this text\n"
 			       "\n");
 			goto exit;
@@ -377,7 +377,11 @@ int main(int argc, char *argv[], char *envp[])
 		break;
 	case ACTION_ATTRIBUTE_WALK:
 		if (path[0] != '\0') {
-			print_device_chain(path);
+			if (print_device_chain(path) != 0) {
+				fprintf(stderr, "device not found\n");
+				rc = 4;
+				goto exit;
+			}
 		} else if (name[0] != '\0') {
 			char devpath[PATH_SIZE];
 
@@ -386,7 +390,11 @@ int main(int argc, char *argv[], char *envp[])
 				rc = 4;
 				goto exit;
 			}
-			print_device_chain(devpath);
+			if (print_device_chain(devpath) != 0) {
+				fprintf(stderr, "device not found\n");
+				rc = 4;
+				goto exit;
+			}
 		} else {
 			fprintf(stderr, "attribute walk needs --path or node --name specified\n");
 			rc = 5;