haraldwolff/qemu-patch-raspberry4
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qemu-char: Add MSG_CMSG_CLOEXEC flag to recvmsg

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Set the close-on-exec flag for the file descriptor received
via SCM_RIGHTS.

Signed-off-by: Corey Bryant <coreyb@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Corey Bryant 2012-08-14 16:43:42 -04:00 committed by Kevin Wolf
parent 03834e22ab
commit 06138651f3
1 changed files with 10 additions and 2 deletions
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12
qemu-char.c
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@ -2238,6 +2238,9 @@ static void unix_process_msgfd(CharDriverState *chr, struct msghdr *msg)
if (fd < 0)
continue;
#ifndef MSG_CMSG_CLOEXEC
qemu_set_cloexec(fd);
#endif
if (s->msgfd != -1)
close(s->msgfd);
s->msgfd = fd;
@ -2253,6 +2256,7 @@ static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
struct cmsghdr cmsg;
char control[CMSG_SPACE(sizeof(int))];
} msg_control;
int flags = 0;
ssize_t ret;
iov[0].iov_base = buf;
@ -2263,9 +2267,13 @@ static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
msg.msg_control = &msg_control;
msg.msg_controllen = sizeof(msg_control);
ret = recvmsg(s->fd, &msg, 0);
if (ret > 0 && s->is_unix)
#ifdef MSG_CMSG_CLOEXEC
flags |= MSG_CMSG_CLOEXEC;
#endif
ret = recvmsg(s->fd, &msg, flags);
if (ret > 0 && s->is_unix) {
unix_process_msgfd(chr, &msg);
}
return ret;
}