libcsupport/src/fpathconf.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /**
0004  *  @file
0005  *
0006  *  @brief Configurable Pathname Varables
0007  *  @ingroup libcsupport
0008  */
0009
0010 /*
0011  *  COPYRIGHT (c) 1989-2011.
0012  *  On-Line Applications Research Corporation (OAR).
0013  *
0014  * Redistribution and use in source and binary forms, with or without
0015  * modification, are permitted provided that the following conditions
0016  * are met:
0017  * 1. Redistributions of source code must retain the above copyright
0018  *    notice, this list of conditions and the following disclaimer.
0019  * 2. Redistributions in binary form must reproduce the above copyright
0020  *    notice, this list of conditions and the following disclaimer in the
0021  *    documentation and/or other materials provided with the distribution.
0022  *
0023  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0024  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0025  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0026  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0027  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0028  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0029  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0030  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0031  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0032  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0033  * POSSIBILITY OF SUCH DAMAGE.
0034  */
0035
0036 #ifdef HAVE_CONFIG_H
0037 #include "config.h"
0038 #endif
0039
0040 #include <rtems/libio_.h>
0041 #include <rtems/seterr.h>
0042
0043 #include <unistd.h>
0044 #include <errno.h>
0045
0046 /**
0047  *  POSIX 1003.1b - 5.7.1 - Configurable Pathname Varables
0048  */
0049 long fpathconf(
0050   int   fd,
0051   int   name
0052 )
0053 {
0054   long                                    return_value;
0055   rtems_libio_t                          *iop;
0056   const rtems_filesystem_limits_and_options_t *the_limits;
0057
0058   LIBIO_GET_IOP( fd, iop );
0059
0060   /*
0061    *  Now process the information request.
0062    */
0063
0064   the_limits = iop->pathinfo.mt_entry->pathconf_limits_and_options;
0065
0066   switch ( name ) {
0067     case _PC_LINK_MAX:
0068       return_value = the_limits->link_max;
0069       break;
0070     case _PC_MAX_CANON:
0071       return_value = the_limits->max_canon;
0072       break;
0073     case _PC_MAX_INPUT:
0074       return_value = the_limits->max_input;
0075       break;
0076     case _PC_NAME_MAX:
0077       return_value = the_limits->name_max;
0078       break;
0079     case _PC_PATH_MAX:
0080       return_value = the_limits->path_max;
0081       break;
0082     case _PC_PIPE_BUF:
0083       return_value = the_limits->pipe_buf;
0084       break;
0085     case _PC_CHOWN_RESTRICTED:
0086       return_value = the_limits->posix_chown_restrictions;
0087       break;
0088     case _PC_NO_TRUNC:
0089       return_value = the_limits->posix_no_trunc;
0090       break;
0091     case _PC_VDISABLE:
0092       return_value = the_limits->posix_vdisable;
0093       break;
0094     case _PC_ASYNC_IO:
0095       return_value = the_limits->posix_async_io;
0096       break;
0097     case _PC_PRIO_IO:
0098       return_value = the_limits->posix_prio_io;
0099       break;
0100     case _PC_SYNC_IO:
0101       return_value = the_limits->posix_sync_io;
0102       break;
0103     default:
0104       errno = EINVAL;
0105       return_value = -1;
0106       break;
0107   }
0108
0109   rtems_libio_iop_drop( iop );
0110   return return_value;
0111 }