[Libguestfs] [PATCH libguestfs 2/8] build: suppress an ignored-dup-return-value warning

[Jim Meyering]

From: Jim Meyering <meyering at redhat.com>

* src/guestfs.c (guestfs_launch): Handle dup failure.
---
 src/guestfs.c |   11 +++++++++--
 1 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/src/guestfs.c b/src/guestfs.c
index ecdf9e5..1cd4f9e 100644
--- a/src/guestfs.c
+++ b/src/guestfs.c
@@ -1162,11 +1162,18 @@ guestfs_launch (guestfs_h *g)
     close (1);
     close (wfd[1]);
     close (rfd[0]);
-    dup (wfd[0]);
-    dup (rfd[1]);
+
+    int fail = 0;
+    fail |= dup (wfd[0]);
+    fail |= dup (rfd[1]);
     close (wfd[0]);
     close (rfd[1]);

+    if (fail) {
+      perror ("dup failed");
+      _exit (1);
+    }
+
 #if 0
     /* Set up a new process group, so we can signal this process
      * and all subprocesses (eg. if qemu is really a shell script).
-- 
1.6.4.378.g88f2f