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-rw-r--r--lib/strerror.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/lib/strerror.c b/lib/strerror.c
index c730670c9..0309e4ff7 100644
--- a/lib/strerror.c
+++ b/lib/strerror.c
@@ -5,7 +5,7 @@
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
- * Copyright (C) 2004, 2006, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 2004 - 2006, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
@@ -637,8 +637,11 @@ const char *Curl_strerror(struct connectdata *conn, int err)
char *msg = strerror_r(err, buffer, sizeof(buffer));
/* this version of strerror_r() only *might* use the buffer we pass to
the function, but it always returns the error message as a pointer,
- so we must copy that string unconditionally */
- strncpy(buf, msg, max);
+ so we must copy that string unconditionally (if non-NULL) */
+ if(msg)
+ strncpy(buf, msg, max);
+ else
+ snprintf(buf, max, "Unknown error %d", err);
}
#endif /* end of HAVE_GLIBC_STRERROR_R */
#else /* HAVE_STRERROR_R */