X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=udev_utils.c;h=e6580d2c0acdca0404e17b2cddb1eee19ec0ad6d;hb=5e39f90b14ccf242618086a0242000fc11317a75;hp=364037f7a98edf9f5e2ea267e57b09b422f79b81;hpb=85925517e67b85c94180b1de5e2cbd6a1c67c54c;p=elogind.git

diff --git a/udev_utils.c b/udev_utils.c
index 364037f7a..e6580d2c0 100644
--- a/udev_utils.c
+++ b/udev_utils.c
@@ -47,15 +47,15 @@ void udev_init_device(struct udevice *udev, const char* devpath, const char *sub
 		strfieldcpy(udev->subsystem, subsystem);
 
 	if (strcmp(udev->subsystem, "block") == 0)
-		udev->type = 'b';
+		udev->type = BLOCK;
 	else if (strcmp(udev->subsystem, "net") == 0)
-		udev->type = 'n';
+		udev->type = NET;
 	else if (strncmp(udev->devpath, "/block/", 7) == 0)
-		udev->type = 'b';
+		udev->type = BLOCK;
 	else if (strncmp(udev->devpath, "/class/net/", 11) == 0)
-		udev->type = 'n';
+		udev->type = NET;
 	else if (strncmp(udev->devpath, "/class/", 7) == 0)
-		udev->type = 'c';
+		udev->type = CLASS;
 
 	udev->mode = 0660;
 	strcpy(udev->owner, "root");
@@ -112,6 +112,31 @@ int create_path(const char *path)
 	return mkdir(p, 0755);
 }
 
+/* Reset permissions on the device node, before unlinking it to make sure,
+ * that permisions of possible hard links will be removed too.
+ */
+int unlink_secure(const char *filename)
+{
+	int retval;
+
+	retval = chown(filename, 0, 0);
+	if (retval)
+		dbg("chown(%s, 0, 0) failed with error '%s'", filename, strerror(errno));
+
+	retval = chmod(filename, 0000);
+	if (retval)
+		dbg("chmod(%s, 0000) failed with error '%s'", filename, strerror(errno));
+
+	retval = unlink(filename);
+	if (errno == ENOENT)
+		retval = 0;
+
+	if (retval)
+		dbg("unlink(%s) failed with error '%s'", filename, strerror(errno));
+
+	return retval;
+}
+
 int parse_get_pair(char **orig_string, char **left, char **right)
 {
 	char *temp;
@@ -200,11 +225,11 @@ size_t buf_get_line(const char *buf, size_t buflen, size_t cur)
 
 void no_trailing_slash(char *path)
 {
-	int len;
+	size_t len;
 
 	len = strlen(path);
-	if (len > 0 && path[len-1] == '/')
-		path[len-1] = '\0';
+	while (len > 0 && path[len-1] == '/')
+		path[--len] = '\0';
 }
 
 struct files {