From a53cc4e0cb30eb55e5ccbd376d1ea803aefa060d Mon Sep 17 00:00:00 2001
From: Karel Zak
Date: Tue, 19 Nov 2013 17:41:28 +0100
Subject: libmount: add mnt_tag_is_valid()

Signed-off-by: Karel Zak <kzak@redhat.com>
---
 libmount/src/utils.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

(limited to 'libmount/src/utils.c')

diff --git a/libmount/src/utils.c b/libmount/src/utils.c
index 0d5a22716..66203d2b4 100644
--- a/libmount/src/utils.c
+++ b/libmount/src/utils.c
@@ -14,6 +14,7 @@
 #include <fcntl.h>
 #include <pwd.h>
 #include <grp.h>
+#include <blkid.h>
 
 #include "strutils.h"
 #include "pathnames.h"
@@ -71,6 +72,22 @@ int mnt_valid_tagname(const char *tagname)
 	return 0;
 }
 
+/**
+ * mnt_tag_is_valid:
+ * @tag: NAME=value string
+ *
+ * Returns: 1 if the @tag is parsable and tag NAME= is supported by libmount, or 0.
+ */
+int mnt_tag_is_valid(const char *tag)
+{
+	char *t = NULL;
+	int rc = tag && blkid_parse_tag_string(tag, &t, NULL) == 0
+		     && mnt_valid_tagname(t);
+
+	free(t);
+	return rc;
+}
+
 int mnt_parse_offset(const char *str, size_t len, uintmax_t *res)
 {
 	char *p;
-- 
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