utils: close parent end in child process after fork

Signed-off-by: Long Wang <w@laoqinren.net>

diff --git a/src/lxc/utils.c b/src/lxc/utils.c
index 620f0525636f4a820ed34d200d5c75bd34011429..9f32f334b1646243aa3144c6042e9b68dcdc8ae8 100644 (file)
--- a/src/lxc/utils.c
+++ b/src/lxc/utils.c
@@ -438,6 +438,9 @@ extern struct lxc_popen_FILE *lxc_popen(const char *command)
                /* child */
                int child_std_end = STDOUT_FILENO;
 
+               close(parent_end);
+               parent_end = -1;
+
                if (child_end != child_std_end) {
                        /* dup2() doesn't dup close-on-exec flag */
                        dup2(child_end, child_std_end);