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virsocket: Simplify virSocketSendFD()

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After previous cleanups, virSocketSendFD() is but a thin wrapper
over virSocketSendMsgWithFDs(). Replace the body of the former
with a call to the latter.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
This commit is contained in:
Michal Privoznik 2024-02-02 13:05:20 +01:00
parent 495a826dbf
commit 91f4ebbac8
2 changed files with 5 additions and 29 deletions
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4
src/util/virfile.c
View File

@ -2445,9 +2445,7 @@ virFileOpenForked(const char *path, int openflags, mode_t mode,
goto childerror;
}
do {
ret = virSocketSendFD(pair[1], fd);
} while (ret < 0 && errno == EINTR);
ret = virSocketSendFD(pair[1], fd);
if (ret < 0) {
ret = -errno;

30
src/util/virsocket.c
View File

@ -382,38 +382,16 @@ vir_socket(int domain, int type, int protocol)
/* virSocketSendFD sends the file descriptor fd along the socket
to a process calling virSocketRecvFD on the other end.
Return 0 on success, or -1 with errno set in case of error.
Return 1 on success, or -1 with errno set in case of error.
*/
int
virSocketSendFD(int sock, int fd)
{
char byte = 0;
struct iovec iov;
struct msghdr msg = { 0 };
struct cmsghdr *cmsg;
char buf[CMSG_SPACE(sizeof(fd))];
int fds[] = { fd };
/* send at least one char */
iov.iov_base = &byte;
iov.iov_len = 1;
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
msg.msg_name = NULL;
msg.msg_namelen = 0;
msg.msg_control = buf;
msg.msg_controllen = sizeof(buf);
cmsg = CMSG_FIRSTHDR(&msg);
cmsg->cmsg_level = SOL_SOCKET;
cmsg->cmsg_type = SCM_RIGHTS;
cmsg->cmsg_len = CMSG_LEN(sizeof(fd));
/* Initialize the payload: */
memcpy(CMSG_DATA(cmsg), &fd, sizeof(fd));
msg.msg_controllen = cmsg->cmsg_len;
if (sendmsg(sock, &msg, 0) != iov.iov_len)
return -1;
return 0;
return virSocketSendMsgWithFDs(sock, &byte, sizeof(byte),
fds, G_N_ELEMENTS(fds));
}