libxl: actually print an error when execve (in libxl__exec) fails

The header comment says libxl__exec logs errors.  So it should do so.

Signed-off-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>

diff --git a/tools/libxl/libxl_exec.c b/tools/libxl/libxl_exec.c
index 6c212209f306474343f99f84273b7a1af7b7a5d1..e770fd3e0943390bef3fafc8dd85b70998de99d7 100644 (file)
--- a/tools/libxl/libxl_exec.c
+++ b/tools/libxl/libxl_exec.c
@@ -55,6 +55,8 @@ void libxl__exec(int stdinfd, int stdoutfd, int stderrfd, const char *arg0,
      * to assume they got DFL. */
 
     execvp(arg0, args);
+
+    fprintf(stderr, "libxl: cannot execute %s: %s\n", arg0, strerror(errno));
     _exit(-1);
 }