memtool: let mw create the target file if it doesn't exist

Signed-off-by: Uwe Kleine-König <[email protected]>
pengutronix · Oct 21, 2016 · a36d06a · a36d06a
1 parent e7f2867
commit a36d06a
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/memtool.c b/memtool.c
@@ -208,7 +208,8 @@ static void *memmap(const char *file, off_t addr, size_t *size, int readonly)
 	if (pagesize < 0)
 		pagesize = 4096;
 
-	memfd = open(file, readonly ? O_RDONLY : O_RDWR);
+	memfd = open(file, readonly ? O_RDONLY : (O_RDWR | O_CREAT),
+		     S_IRUSR | S_IWUSR);
 	if (memfd < 0) {
 		perror("open");
 		return NULL;