fix all cases of strcpy on overlapping strings.

[oweals/busybox.git] / libbb / safe_strncpy.c

diff --git a/libbb/safe_strncpy.c b/libbb/safe_strncpy.c
index 649fa10cf78052c60271cba48d6a5f83dcca0001..4acd9766ba7c896076826e0f538d7fddc55af8f2 100644 (file)
--- a/libbb/safe_strncpy.c
+++ b/libbb/safe_strncpy.c
@@ -16,3 +16,12 @@ char* FAST_FUNC safe_strncpy(char *dst, const char *src, size_t size)
        dst[--size] = '\0';
        return strncpy(dst, src, size);
 }
+
+/* Like strcpy but can copy overlapping strings. */
+void FAST_FUNC overlapping_strcpy(char *dst, const char *src)
+{
+       while ((*dst = *src) != '\0') {
+               dst++;
+               src++;
+       }
+}