libcsupport/src/fstat.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /*
0004  *  fstat() - POSIX 1003.1b 5.6.2 - Get File Status
0005  *
0006  *  COPYRIGHT (c) 1989-1999.
0007  *  On-Line Applications Research Corporation (OAR).
0008  *
0009  * Redistribution and use in source and binary forms, with or without
0010  * modification, are permitted provided that the following conditions
0011  * are met:
0012  * 1. Redistributions of source code must retain the above copyright
0013  *    notice, this list of conditions and the following disclaimer.
0014  * 2. Redistributions in binary form must reproduce the above copyright
0015  *    notice, this list of conditions and the following disclaimer in the
0016  *    documentation and/or other materials provided with the distribution.
0017  *
0018  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0019  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0020  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0021  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0022  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0023  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0024  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0025  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0026  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0027  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0028  * POSSIBILITY OF SUCH DAMAGE.
0029  */
0030
0031 #ifdef HAVE_CONFIG_H
0032 #include "config.h"
0033 #endif
0034
0035 #include <sys/stat.h>
0036 #include <unistd.h>
0037 #include <string.h>
0038
0039 #include <rtems/libio_.h>
0040 #include <rtems/seterr.h>
0041
0042 int fstat(
0043   int          fd,
0044   struct stat *sbuf
0045 )
0046 {
0047   rtems_libio_t *iop;
0048   int            rv;
0049
0050   /*
0051    *  Check to see if we were passed a valid pointer.
0052    */
0053   if ( !sbuf )
0054     rtems_set_errno_and_return_minus_one( EFAULT );
0055
0056   /*
0057    *  Now process the stat() request.
0058    */
0059   LIBIO_GET_IOP( fd, iop );
0060
0061   /*
0062    *  Zero out the stat structure so the various support
0063    *  versions of stat don't have to.
0064    */
0065   memset( sbuf, 0, sizeof(struct stat) );
0066
0067   rv = (*iop->pathinfo.handlers->fstat_h)( &iop->pathinfo, sbuf );
0068   rtems_libio_iop_drop( iop );
0069   return rv;
0070 }
0071
0072 /*
0073  *  _fstat_r
0074  *
0075  *  This is the Newlib dependent reentrant version of fstat().
0076  */
0077
0078 #if defined(RTEMS_NEWLIB) && !defined(HAVE_FSTAT_R)
0079
0080 #include <reent.h>
0081
0082 int _fstat_r(
0083   struct _reent *ptr RTEMS_UNUSED,
0084   int            fd,
0085   struct stat   *buf
0086 )
0087 {
0088   return fstat( fd, buf );
0089 }
0090 #endif