From: Portisch <hugo.portisch@yahoo.de>
Date: Mon, 8 Nov 2021 11:31:39 +0000 (+0100)
Subject: sysfs: fallback for partitions not including parent name
X-Git-Tag: v2.38-rc1~177^2
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=9b59641bcec3df9c451eea4c7057751a153a3fcb;p=thirdparty%2Futil-linux.git

sysfs: fallback for partitions not including parent name
---

diff --git a/lib/sysfs.c b/lib/sysfs.c
index bb71833193..191d870f66 100644
--- a/lib/sysfs.c
+++ b/lib/sysfs.c
@@ -210,9 +210,10 @@ int sysfs_blkdev_is_partition_dirent(DIR *dir, struct dirent *d, const char *par
 	    d->d_type != DT_UNKNOWN)
 		return 0;
 #endif
+	size_t len = 0;
+
 	if (parent_name) {
 		const char *p = parent_name;
-		size_t len;
 
 		/* /dev/sda --> "sda" */
 		if (*parent_name == '/') {
@@ -223,14 +224,15 @@ int sysfs_blkdev_is_partition_dirent(DIR *dir, struct dirent *d, const char *par
 		}
 
 		len = strlen(p);
-		if (strlen(d->d_name) <= len)
-			return 0;
+		if ((strlen(d->d_name) <= len) || (strncmp(p, d->d_name, len) != 0))
+			len = 0;
+	}
 
+	if (len > 0) {
 		/* partitions subdir name is
 		 *	"<parent>[:digit:]" or "<parent>p[:digit:]"
 		 */
-		return strncmp(p, d->d_name, len) == 0 &&
-		       ((*(d->d_name + len) == 'p' && isdigit(*(d->d_name + len + 1)))
+		return ((*(d->d_name + len) == 'p' && isdigit(*(d->d_name + len + 1)))
 			|| isdigit(*(d->d_name + len)));
 	}