Function cupsdPipeCommand

scheduler/util.c:233–322

 */

cups_file_t *				/* O - CUPS file or NULL on error */
cupsdPipeCommand(int        *pid,	/* O - Process ID or 0 on error */
                 const char *command,	/* I - Command to run */
                 char       **argv,	/* I - Arguments to pass to command */
		 uid_t      user)	/* I - User to run as or 0 for current */
{
  int	fd,				/* Temporary file descriptor */
	fds[2];				/* Pipe file descriptors */


 /*
  * First create the pipe...
  */

  if (pipe(fds))
  {
    *pid = 0;
    return (NULL);
  }

 /*
  * Set the "close on exec" flag on each end of the pipe...
  */

  if (fcntl(fds[0], F_SETFD, fcntl(fds[0], F_GETFD) | FD_CLOEXEC))
  {
    close(fds[0]);
    close(fds[1]);

    *pid = 0;

    return (NULL);
  }

  if (fcntl(fds[1], F_SETFD, fcntl(fds[1], F_GETFD) | FD_CLOEXEC))
  {
    close(fds[0]);
    close(fds[1]);

    *pid = 0;

    return (NULL);
  }

 /*
  * Then run the command...
  */

  if ((*pid = fork()) < 0)
  {
   /*
    * Unable to fork!
    */

    *pid = 0;
    close(fds[0]);
    close(fds[1]);