libmemif: fix insecure uses of strncpy

[vpp.git] / extras / libmemif / src / memif_private.h

diff --git a/extras/libmemif/src/memif_private.h b/extras/libmemif/src/memif_private.h
index dd58d62..59899fd 100644 (file)
--- a/extras/libmemif/src/memif_private.h
+++ b/extras/libmemif/src/memif_private.h
@@ -66,6 +66,33 @@ _Static_assert (strlen (MEMIF_DEFAULT_APP_NAME) <= MEMIF_NAME_LEN,
 #define DBG(...)
 #endif /* MEMIF_DBG */
 
+#ifndef HAS_LIB_BSD
+static inline size_t
+strlcpy (char *dest, const char *src, size_t len)
+{
+  const char *s = src;
+  size_t n = len;
+
+  while (--n > 0)
+    {
+      if ((*dest++ = *s++) == '\0')
+       break;
+    }
+
+  if (n == 0)
+    {
+      if (len != 0)
+       *dest = '\0';
+      while (*s++)
+       ;
+    }
+
+  return (s - src - 1);
+}
+#else
+#include <bsd/string.h>
+#endif
+
 typedef enum
 {
   MEMIF_SOCKET_TYPE_NONE = 0,  /* unassigned, not used by any interface */