/**
** Analogue: fputs().
** Sends two commands to the child: first the "real command", then the
** "tag (trivial) command".
** Uses a "lazy fork" concept; we don't actually start the child
** at the time of the child_open() call but instead when the first cmd
** is sent. This means a program which employs a dispatcher, for instance,
** can do a child_open() in the main function, pass the handle off to
** all the routines it dispatches to, and child_close() before exiting
** without worrying about which of those functions will actually need
** the coprocess. If some of them don't need it, they won't send it
** any commands and will incur no fork/exec overhead.
**/
int
child_puts(char *s, CHILD *handle, AV* perl_out_array, AV* perl_err_array)
{
int n;
if (handle == NULL)
handle = mru_handle;
if ((mru_handle = handle) == NULL)
return 0;
if (handle->cph_pid == 0) {
if (_cp_start_child(handle) != 0) {
fprintf(stderr, "can't start child %s\n", handle->cph_cmd);
exit(1);
}
/* Add file descriptors to poll vector. */
poll_add_fd( fileno(handle->cph_back),
NPOLL_TXT, bck_read, NULL, handle );
poll_add_fd( fileno(handle->cph_err),
NPOLL_TXT, err_read, NULL, handle );
}
/* Save Perl array references for access from callbacks. */
handle->cph_out_array = perl_out_array;
handle->cph_err_array = perl_err_array;
_dbg(F,L,1, "-->> %s", s);
/** set error count to 0 for new command **/
handle->cph_errs = 0;
/** send the cmd down the pipe to the child **/
if ((n = fputs(s, handle->cph_down)) == EOF)
return EOF;
/** be helpful and add a newline if there isn't one **/
if (strrchr(s, '\n') != endof(s) - 1)
if (fputc('\n', handle->cph_down) == EOF)
return EOF;
/** send the tag cmd **/
_dbg(F,L,4, "-->> [TAG]");
if (fputs(handle->cph_tag, handle->cph_down) == EOF)
return EOF;
handle->cph_pending = TRUE;
_dbg(F,L,4, "pending ...");
/** poll **/
poll_rcv( NPOLL_NO_TIMEOUT );
return n;
}
void poll_accept(Poll_t *pol)
{
if(pol->clients_[0].revents & POLLIN)
{
int peerfd = accept(pol->listenfd_, NULL, NULL);
if(peerfd == -1)
ERR_EXIT("accept");
poll_add_fd(pol, peerfd);
}
}
void poll_handle_accept(poll_t *_poll)
{
if (_poll->clients_[0].revents & POLLIN)
{
int peerfd = accept(_poll->listenfd_, NULL, NULL);
if (peerfd == -1)
{
ERR_EXIT("accept");
}
poll_add_fd(_poll, peerfd);
}
}
