source: rtems/c/src/lib/libc/fpathconf.c @ 0162910

/*
 *  fpathconf() - POSIX 1003.1b - 5.7.1 - Configurable Pathname Varables
 *
 *  COPYRIGHT (c) 1989-1998.
 *  On-Line Applications Research Corporation (OAR).
 *  Copyright assigned to U.S. Government, 1994.
 *
 *  The license and distribution terms for this file may be
 *  found in the file LICENSE in this distribution or at
 *  http://www.OARcorp.com/rtems/license.html.
 *
 *  $Id$
 */

#include "libio_.h"

#include <unistd.h>
#include <errno.h>

long fpathconf(
  int   fd,
  int   name
)
{
  long                                    return_value;
  rtems_libio_t                          *iop;
  rtems_filesystem_limits_and_options_t  *the_limits;

  rtems_libio_check_fd(fd);
  iop = rtems_libio_iop(fd);
  rtems_libio_check_permissions(iop, LIBIO_FLAGS_READ);

  /*
   *  If this file descriptor is mapped to an external set of handlers,
   *  then it is an error since fpathconf() is not included in the 
   *  set.
   */

  if ( iop->flags & LIBIO_FLAGS_HANDLER_MASK )
    set_errno_and_return_minus_one( EBADF );

  /*
   *  Now process the information request.
   */

  the_limits = &iop->pathinfo.mt_entry->pathconf_limits_and_options;

  switch ( name ) {
    case _PC_LINK_MAX:
      return_value = the_limits->link_max;
      break;
    case _PC_MAX_CANON:
      return_value = the_limits->max_canon;
      break;
    case _PC_MAX_INPUT:
      return_value = the_limits->max_input;
      break;
    case _PC_NAME_MAX:
      return_value = the_limits->name_max;
      break;
    case _PC_PATH_MAX:
      return_value = the_limits->path_max;
      break;
    case _PC_PIPE_BUF:
      return_value = the_limits->pipe_buf;
      break;
    case _PC_CHOWN_RESTRICTED:
      return_value = the_limits->posix_chown_restrictions;
      break;
    case _PC_NO_TRUNC:
      return_value = the_limits->posix_no_trunc;
      break;
    case _PC_VDISABLE:
      return_value = the_limits->posix_vdisable;
      break;
    case _PC_ASYNC_IO:
      return_value = the_limits->posix_async_io;
      break;
    case _PC_PRIO_IO:
      return_value = the_limits->posix_prio_io;
      break;
    case _PC_SYNC_IO:
      return_value = the_limits->posix_sync_io;
      break;
    default:
      set_errno_and_return_minus_one( EINVAL );
      break;
  }

  return return_value;
}