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src/subversion/subversion/libsvn_subr/prompt.c  view on Meta::CPAN

#endif

  /* Close terminal handles. */
  if (close_handles && terminal->close_handles)
    {
      apr_file_t *const infd = terminal->infd;
      apr_file_t *const outfd = terminal->outfd;

      if (infd)
        {
          terminal->infd = NULL;
          status = apr_file_close(infd);
        }

      if (!status && outfd && outfd != infd)
        {
          terminal->outfd = NULL;
          status = apr_file_close(terminal->outfd);
        }
    }
  return status;
}

/* Normal pool cleanup for a terminal. */
static apr_status_t terminal_plain_cleanup(void *baton)
{
  return terminal_cleanup_handler(baton, FALSE, TRUE);
}

/* Child pool cleanup for a terminal -- does not restore echo state. */
static apr_status_t terminal_child_cleanup(void *baton)
{
  return terminal_cleanup_handler(baton, FALSE, FALSE);
}

/* Explicitly close the terminal, removing its cleanup handlers. */
static svn_error_t *
terminal_close(terminal_handle_t *terminal)
{
  apr_status_t status;

  /* apr_pool_cleanup_kill() removes both normal and child cleanup */
  apr_pool_cleanup_kill(terminal->pool, terminal, terminal_plain_cleanup);

  status = terminal_cleanup_handler(terminal, TRUE, TRUE);
  if (status)
    return svn_error_create(status, NULL, _("Can't close terminal"));
  return SVN_NO_ERROR;
}

/* Allocate and open *TERMINAL. If NOECHO is TRUE, try to turn off
   terminal echo.  Use POOL for all allocations.*/
static svn_error_t *
terminal_open(terminal_handle_t **terminal, svn_boolean_t noecho,
              apr_pool_t *pool)
{
  apr_status_t status;

#ifdef WIN32
  /* On Windows, we'll use the console API directly if the process has
     a console attached; otherwise we'll just use stdin and stderr. */
  const HANDLE conin = CreateFileW(L"CONIN$", GENERIC_READ,
                                   FILE_SHARE_READ | FILE_SHARE_WRITE,
                                   NULL, OPEN_EXISTING,
                                   FILE_ATTRIBUTE_NORMAL, NULL);
  *terminal = apr_palloc(pool, sizeof(terminal_handle_t));
  if (conin != INVALID_HANDLE_VALUE)
    {
      /* The process has a console. */
      CloseHandle(conin);
      terminal_handle_init(*terminal, NULL, NULL, noecho, FALSE, NULL);
      return SVN_NO_ERROR;
    }
#else  /* !WIN32 */
  /* Without evidence to the contrary, we'll assume this is *nix and
     try to open /dev/tty. If that fails, we'll use stdin for input
     and stderr for prompting. */
  apr_file_t *tmpfd;
  status = apr_file_open(&tmpfd, "/dev/tty",
                         APR_READ | APR_WRITE,
                         APR_OS_DEFAULT, pool);
  *terminal = apr_palloc(pool, sizeof(terminal_handle_t));
  if (!status)
    {
      /* We have a terminal handle that we can use for input and output. */
      terminal_handle_init(*terminal, tmpfd, tmpfd, FALSE, TRUE, pool);
    }
#endif /* !WIN32 */
  else
    {
      /* There is no terminal. Sigh. */
      apr_file_t *infd;
      apr_file_t *outfd;

      status = apr_file_open_stdin(&infd, pool);
      if (status)
        return svn_error_wrap_apr(status, _("Can't open stdin"));
      status = apr_file_open_stderr(&outfd, pool);
      if (status)
        return svn_error_wrap_apr(status, _("Can't open stderr"));
      terminal_handle_init(*terminal, infd, outfd, FALSE, FALSE, pool);
    }

#ifdef HAVE_TERMIOS_H
  /* Set terminal state */
  if (0 == apr_os_file_get(&(*terminal)->osinfd, (*terminal)->infd))
    {
      if (0 == tcgetattr((*terminal)->osinfd, &(*terminal)->attr))
        {
          struct termios attr = (*terminal)->attr;
          /* Turn off signal handling and canonical input mode */
          attr.c_lflag &= ~(ISIG | ICANON);
          attr.c_cc[VMIN] = 1;          /* Read one byte at a time */
          attr.c_cc[VTIME] = 0;         /* No timeout, wait indefinitely */
          attr.c_lflag &= ~(ECHO);      /* Turn off echo */
          if (0 == tcsetattr((*terminal)->osinfd, TCSAFLUSH, &attr))
            {
              (*terminal)->noecho = noecho;
              (*terminal)->restore_state = TRUE;
            }
        }