static int lxc_cmd_send(const char *name, struct lxc_cmd_rr *cmd,
const char *lxcpath, const char *hashed_sock_name)
{
int client_fd, saved_errno;
ssize_t ret = -1;
client_fd = lxc_cmd_connect(name, lxcpath, hashed_sock_name, "command");
if (client_fd < 0)
return -1;
ret = lxc_abstract_unix_send_credential(client_fd, &cmd->req,
sizeof(cmd->req));
if (ret < 0 || (size_t)ret != sizeof(cmd->req))
goto on_error;
if (cmd->req.datalen <= 0)
return client_fd;
errno = EMSGSIZE;
ret = lxc_send_nointr(client_fd, (void *)cmd->req.data,
cmd->req.datalen, MSG_NOSIGNAL);
if (ret < 0 || ret != (ssize_t)cmd->req.datalen)
goto on_error;
return client_fd;
on_error:
saved_errno = errno;
close(client_fd);
errno = saved_errno;
return -1;
}
static int lxc_cmd_send(const char *name, struct lxc_cmd_rr *cmd,
const char *lxcpath, const char *hashed_sock_name)
{
__do_close_prot_errno int client_fd = -EBADF;
ssize_t ret = -1;
client_fd = lxc_cmd_connect(name, lxcpath, hashed_sock_name, "command");
if (client_fd < 0)
return -1;
ret = lxc_abstract_unix_send_credential(client_fd, &cmd->req,
sizeof(cmd->req));
if (ret < 0 || (size_t)ret != sizeof(cmd->req))
return -1;
if (cmd->req.datalen <= 0)
return move_fd(client_fd);
errno = EMSGSIZE;
ret = lxc_send_nointr(client_fd, (void *)cmd->req.data,
cmd->req.datalen, MSG_NOSIGNAL);
if (ret < 0 || ret != (ssize_t)cmd->req.datalen)
return -1;
return move_fd(client_fd);
}
/*
* lxc_cmd_rsp_send: Send a command response
*
* @fd : file descriptor of socket to send response on
* @rsp : response to send
*
* Returns 0 on success, < 0 on failure
*/
static int lxc_cmd_rsp_send(int fd, struct lxc_cmd_rsp *rsp)
{
ssize_t ret;
errno = EMSGSIZE;
ret = lxc_send_nointr(fd, rsp, sizeof(*rsp), MSG_NOSIGNAL);
if (ret < 0 || (size_t)ret != sizeof(*rsp)) {
SYSERROR("Failed to send command response %zd", ret);
return -1;
}
if (!rsp->data || rsp->datalen <= 0)
return 0;
errno = EMSGSIZE;
ret = lxc_send_nointr(fd, rsp->data, rsp->datalen, MSG_NOSIGNAL);
if (ret < 0 || ret != (ssize_t)rsp->datalen) {
SYSWARN("Failed to send command response data %zd", ret);
return -1;
}
return 0;
}
