[libvirt] [PATCH] lxc: check for waitpid failure

[Eric Blake]

Detected by Coverity.  waitpid() can leak resources if it fails with
EINTR, so it should never be used without checking return status.

* src/lxc/lxc_container.c (lxcContainerAvailable): Use safer
virWaitPid.
---
 src/lxc/lxc_container.c |    5 ++---
 1 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/src/lxc/lxc_container.c b/src/lxc/lxc_container.c
index e9891f7..06ccf7e 100644
--- a/src/lxc/lxc_container.c
+++ b/src/lxc/lxc_container.c
@@ -1229,7 +1229,6 @@ int lxcContainerAvailable(int features)
     int cpid;
     char *childStack;
     char *stack;
-    int childStatus;

     if (features & LXC_CONTAINER_FEATURE_USER)
         flags |= CLONE_NEWUSER;
@@ -1251,8 +1250,8 @@ int lxcContainerAvailable(int features)
         VIR_DEBUG("clone call returned %s, container support is not enabled",
               virStrerror(errno, ebuf, sizeof ebuf));
         return -1;
-    } else {
-        waitpid(cpid, &childStatus, 0);
+    } else if (virPidWait(cpid, NULL) < 0) {
+        return -1;
     }

     VIR_DEBUG("Mounted all filesystems");
-- 
1.7.4.4