libcsupport/src/stat.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /**
0004  *  @file
0005  *
0006  *  @brief Get File Status
0007  *  @ingroup libcsupport
0008  */
0009
0010 /*
0011  *  COPYRIGHT (c) 1989-2013.
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 /*
0041  *  lstat() and stat() share the same implementation with a minor
0042  *  difference on how links are evaluated.
0043  */
0044
0045 #ifndef _STAT_NAME
0046 #define _STAT_NAME         stat
0047 #define _STAT_R_NAME       _stat_r
0048 #define _STAT_FOLLOW_LINKS RTEMS_FS_FOLLOW_LINK
0049 #endif
0050
0051 #include <sys/stat.h>
0052 #include <string.h>
0053
0054 #include <rtems/libio_.h>
0055
0056 /*
0057  *  Prototype to avoid warnings
0058  */
0059 int _STAT_NAME( const char *path, struct stat *buf );
0060
0061 /**
0062  *  POSIX 1003.1b 5.6.2 - Get File Status
0063  *
0064  *  Reused from lstat().
0065  */
0066 int _STAT_NAME( const char *path, struct stat *buf )
0067 {
0068   int rv = 0;
0069   rtems_filesystem_eval_path_context_t ctx;
0070   int eval_flags = _STAT_FOLLOW_LINKS;
0071   const rtems_filesystem_location_info_t *currentloc =
0072     rtems_filesystem_eval_path_start( &ctx, path, eval_flags );
0073
0074   memset( buf, 0, sizeof( *buf ) );
0075
0076   rv = (*currentloc->handlers->fstat_h)( currentloc, buf );
0077
0078   rtems_filesystem_eval_path_cleanup( &ctx );
0079
0080   return rv;
0081 }
0082
0083 #if defined(RTEMS_NEWLIB)
0084
0085 #include <reent.h>
0086
0087 /*
0088  *  Prototype to avoid warnings
0089  */
0090 int _STAT_R_NAME(
0091   struct _reent *ptr RTEMS_UNUSED,
0092   const char    *path,
0093   struct stat   *buf
0094 );
0095
0096 /**
0097  *  This is the Newlib dependent reentrant version of stat() and lstat().
0098  */
0099 int _STAT_R_NAME(
0100   struct _reent *ptr RTEMS_UNUSED,
0101   const char    *path,
0102   struct stat   *buf
0103 )
0104 {
0105   return _STAT_NAME( path, buf );
0106 }
0107 #endif