X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=udev-add.c;h=586911acc2956bc368e1fc30190bc8c9604c735d;hp=33ee633fd8765a5fdf0d87a5b87bbb5dfa12c102;hb=4d803d8d04a8493f8efc039c7789c65be33048a0;hpb=5d4754f19521568b775ba7a31465d3af192ce382

diff --git a/udev-add.c b/udev-add.c
index 33ee633fd..586911acc 100644
--- a/udev-add.c
+++ b/udev-add.c
@@ -37,6 +37,7 @@
 #include "udev.h"
 #include "udev_version.h"
 #include "udev_dbus.h"
+#include "logging.h"
 #include "namedev.h"
 #include "udevdb.h"
 #include "libsysfs/libsysfs.h"
@@ -100,6 +101,7 @@ static int create_path(char *file)
 
 static int create_node(struct udevice *dev)
 {
+	struct stat stats;
 	char filename[255];
 	char linktarget[255];
 	char *linkname;
@@ -140,6 +142,7 @@ static int create_node(struct udevice *dev)
 	if (strrchr(dev->name, '/'))
 		create_path(filename);
 
+	info("creating device node '%s'", filename);
 	dbg("mknod(%s, %#o, %u, %u)", filename, dev->mode, dev->major, dev->minor);
 	retval = mknod(filename, dev->mode, res);
 	if (retval)
@@ -152,29 +155,29 @@ static int create_node(struct udevice *dev)
 		dbg("chmod(%s, %#o) failed with error '%s'",
 		    filename, dev->mode, strerror(errno));
 
-	if (*dev->owner) {
+	if (dev->owner[0]) {
 		char *endptr;
 		unsigned long id = strtoul(dev->owner, &endptr, 10);
-		if (*endptr == 0x00)
+		if (endptr[0] == '\0')
 			uid = (uid_t) id;
 		else {
 			struct passwd *pw = getpwnam(dev->owner);
-			if (!pw)
-				dbg("user unknown '%s'", dev->owner);
+			if (pw == NULL)
+				dbg("specified user unknown '%s'", dev->owner);
 			else
 				uid = pw->pw_uid;
 		}
 	}
 
-	if (*dev->group) {
+	if (dev->group[0]) {
 		char *endptr;
 		unsigned long id = strtoul(dev->group, &endptr, 10);
-		if (*endptr == 0x00)
+		if (endptr[0] == '\0')
 			gid = (gid_t) id;
 		else {
 			struct group *gr = getgrnam(dev->group);
-			if (!gr)
-				dbg("group unknown '%s'", dev->group);
+			if (gr == NULL)
+				dbg("specified group unknown '%s'", dev->group);
 			else
 				gid = gr->gr_gid;
 		}
@@ -189,11 +192,11 @@ static int create_node(struct udevice *dev)
 	}
 
 	/* create symlink if requested */
-	if (*dev->symlink) {
+	if (dev->symlink[0]) {
 		symlinks = dev->symlink;
 		while (1) {
 			linkname = strsep(&symlinks, " ");
-			if (linkname == NULL)
+			if (linkname == NULL || linkname[0] == '\0')
 				break;
 
 			strncpy(filename, udev_root, sizeof(filename));
@@ -221,6 +224,16 @@ static int create_node(struct udevice *dev)
 				strcpy(linktarget, "./");
 			strcat(linktarget, &dev->name[tail]);
 
+			/* unlink existing non-directories to ensure that our symlink
+			 * is created */
+			if (lstat(filename, &stats) == 0) {
+				if ((stats.st_mode & S_IFMT) != S_IFDIR) {
+					if (unlink(filename))
+						dbg("unlink(%s) failed with error '%s'",
+						    filename, strerror(errno));
+				}
+			}
+
 			dbg("symlink(%s, %s)", linktarget, filename);
 			retval = symlink(linktarget, filename);
 			if (retval)
@@ -242,9 +255,9 @@ static struct sysfs_class_device *get_class_dev(char *device_name)
 	dbg("looking at '%s'", dev_path);
 
 	/* open up the sysfs class device for this thing... */
-	class_dev = sysfs_open_class_device(dev_path);
+	class_dev = sysfs_open_class_device_path(dev_path);
 	if (class_dev == NULL) {
-		dbg ("sysfs_open_class_device failed");
+		dbg ("sysfs_open_class_device_path failed");
 		goto exit;
 	}
 	dbg("class_dev->name='%s'", class_dev->name);