/* wrappi
 * Copyright (C) 2011-2012 Red Hat Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include <config.h>

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>

#include "wrappi.h"
#include "internal.h"

void
wrap_int_connect_ssh (wrap_h *w)
{
  int rfd[2];
  int wfd[2];

  if (pipe (rfd) == -1) {
    set_error_errno ("pipe");
    return;
  }

  if (pipe (wfd) == -1) {
    set_error_errno ("pipe");
    close (rfd[0]);
    close (rfd[1]);
    return;
  }

  w->pid = fork ();
  if (w->pid == -1) {
    set_error_errno ("fork");
    close (rfd[0]);
    close (rfd[1]);
    close (wfd[0]);
    close (wfd[1]);
    return;
  }

  if (w->pid == 0) {
    /* Child process. */
    close (wfd[1]);
    close (rfd[0]);

    close (0);
    close (1);
    dup2 (rfd[1], 1);
    dup2 (wfd[0], 0);

    execlp ("ssh",
            "ssh",
            "-T", "-o", "BatchMode=yes", "-e", "none",
            w->hostname,
            "sh", "-c", w->wrappid_path ? : "wrappid",
            NULL);
    perror ("ssh");
    _exit (EXIT_FAILURE);
  }

  /* Parent process. */
  close (wfd[0]);
  close (rfd[1]);

  if (w->rfp) {
    fclose (w->rfp);
    w->rfp = NULL;
  }

  if (w->wfp) {
    fclose (w->wfp);
    w->wfp = NULL;
  }

  w->rfp = fdopen (rfd[0], "r");
  if (w->rfp == NULL) {
    set_error_errno ("fdopen: rfp");
    close (rfd[0]);
    close (wfd[1]);
    waitpid (w->pid, NULL, 0);
    w->pid = 0;
    return;
  }

  w->wfp = fdopen (wfd[1], "w");
  if (w->wfp == NULL) {
    set_error_errno ("fdopen: wfp");
    fclose (w->rfp);
    w->rfp = NULL;
    close (wfd[1]);
    waitpid (w->pid, NULL, 0);
    w->pid = 0;
    return;
  }
}