[libvirt] [PATCH v5 1/6] qemu-char: Add MSG_CMSG_CLOEXEC flag to recvmsg

Set the close-on-exec flag for the file descriptor received via SCM_RIGHTS. v4 -This patch is new in v4 (eblake(a)redhat.com) v5 -Fallback to FD_CLOEXEC if MSG_CMSG_CLOEXEC is not available (eblake(a)redhat.com, stefanha(a)linux.vnet.ibm.com) Signed-off-by: Corey Bryant <coreyb(a)linux.vnet.ibm.com&gt; --- qemu-char.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/qemu-char.c b/qemu-char.c index c2aaaee..eedf66d 100644 --- a/qemu-char.c +++ b/qemu-char.c @@ -2263,9 +2263,17 @@ static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len) msg.msg_control = &msg_control; msg.msg_controllen = sizeof(msg_control); +#ifdef MSG_CMSG_CLOEXEC + ret = recvmsg(s->fd, &msg, MSG_CMSG_CLOEXEC); +#else ret = recvmsg(s->fd, &msg, 0); - if (ret > 0 && s->is_unix) + if (ret > 0) { + qemu_set_cloexec(s->fd); + } +#endif + if (ret > 0 && s->is_unix) { unix_process_msgfd(chr, &msg); + } return ret; } -- 1.7.10.4