libxl: correctly handle readlink() errors

readlink() returns a ssize_t with a negative value on failure.

Coverity-ID: 1055566
Signed-off-by: Matthew Daley <mattjd@gmail.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>

diff --git a/tools/libxl/libxl_exec.c b/tools/libxl/libxl_exec.c
index 98bfd716ace3a6e59d31b7382d08c07d7ece50a3..7eddaef2e3335bd3b9a96f1d820bfee7c60ea7ff 100644 (file)
--- a/tools/libxl/libxl_exec.c
+++ b/tools/libxl/libxl_exec.c
@@ -33,7 +33,7 @@ static void check_open_fds(const char *what)
 
     for (i = 4; i < 256; i++) {
 #ifdef __linux__
-        size_t len;
+        ssize_t len;
         char path[PATH_MAX];
         char linkpath[PATH_MAX+1];
 #endif