Function recv_fd

cdb2api/cdb2api.c:645–659

This wrapper ensures that on error we close any file descriptor that we * may have received before the error occured. Alse we make sure that we * preserve the value of errno which may be needed if the error was * PASSFD_RECVMSG. */

 * preserve the value of errno which may be needed if the error was
 * PASSFD_RECVMSG. */
static int recv_fd(int sockfd, void *data, size_t nbytes, int *fd_recvd)
{
    int rc;
    rc = recv_fd_int(sockfd, data, nbytes, fd_recvd);
    if (rc != 0 && *fd_recvd != -1) {
        int errno_save = errno;
        if (close(*fd_recvd) == -1) {
            fprintf(stderr, "%s: close(%d) error: %d %s\n", __func__, *fd_recvd,
                    errno, strerror(errno));
        }
        *fd_recvd = -1;
        errno = errno_save;
    }
    return rc;
}

static int send_fd_to(int sockfd, const void *data, size_t nbytes,
                      int fd_to_send, int timeoutms)