From: Dongsu Park <dongsu.park(a)profitbricks.com&gt; If fcntl with F_DUPFD_CLOEXEC fails, we need to try again to use dup() to get the fd, instead of giving up right away. Signed-off-by: Dongsu Park <dongsu.park(a)profitbricks.com&gt; Signed-off-by: Vasilis Liaskovitis <vasilis.liaskovitis(a)profitbricks.com&gt; --- src/rpc/virnetsocket.c | 9 ++++++++- 1 files changed, 8 insertions(+), 1 deletions(-) diff --git a/src/rpc/virnetsocket.c b/src/rpc/virnetsocket.c index af4fc5e..25c7891 100644 --- a/src/rpc/virnetsocket.c +++ b/src/rpc/virnetsocket.c @@ -778,8 +778,15 @@ int virNetSocketDupFD(virNetSocketPtr sock, bool cloexec) { int fd; - if (cloexec) + if (cloexec) { fd = fcntl(sock->fd, F_DUPFD_CLOEXEC); + /* retry to use dup if fcntl fails */ + if (fd < 0) { + virReportSystemError(errno, "%s", + _("fcntl failed, reverting to dup")); + fd = dup(sock->fd); + } + } else fd = dup(sock->fd); if (fd < 0) { -- 1.7.7.2