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File indexing completed on 2025-05-11 08:24:15

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002 
0003 /**
0004  *  @file
0005  *
0006  *  @brief Create a Special or Ordinary File 
0007  *  @ingroup libcsupport
0008  */
0009 
0010 /*
0011  *  COPYRIGHT (c) 1989-1999.
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 <sys/stat.h>
0041 
0042 #include <rtems/libio_.h>
0043 
0044 int rtems_filesystem_mknod(
0045   const rtems_filesystem_location_info_t *parentloc,
0046   const char *name,
0047   size_t namelen,
0048   mode_t mode,
0049   dev_t dev
0050 )
0051 {
0052   int rv = 0;
0053 
0054   mode &= ~rtems_filesystem_umask;
0055 
0056   switch (mode & S_IFMT) {
0057     case S_IFBLK:
0058     case S_IFCHR:
0059     case S_IFDIR:
0060     case S_IFIFO:
0061     case S_IFREG:
0062       break;
0063     default:
0064       errno = EINVAL;
0065       rv = -1;
0066       break;
0067   }
0068   
0069   if ( rv == 0 ) {
0070     const rtems_filesystem_operations_table *ops = parentloc->mt_entry->ops;
0071 
0072     rv = (*ops->mknod_h)( parentloc, name, namelen, mode, dev );
0073   }
0074 
0075   return rv;
0076 }
0077 
0078 /**
0079  * This routine is not defined in the POSIX 1003.1b standard but is
0080  *  commonly supported on most UNIX and POSIX systems.  It is the
0081  *  foundation for creating file system objects.
0082  */
0083 int mknod( const char *path, mode_t mode, dev_t dev )
0084 {
0085   int rv = 0;
0086   rtems_filesystem_eval_path_context_t ctx;
0087   int eval_flags = RTEMS_FS_FOLLOW_LINK
0088     | RTEMS_FS_MAKE
0089     | RTEMS_FS_EXCLUSIVE
0090     | (S_ISDIR(mode) ? RTEMS_FS_ACCEPT_RESIDUAL_DELIMITERS : 0);
0091   const rtems_filesystem_location_info_t *currentloc =
0092     rtems_filesystem_eval_path_start( &ctx, path, eval_flags );
0093 
0094   rv = rtems_filesystem_mknod(
0095     currentloc,
0096     rtems_filesystem_eval_path_get_token( &ctx ),
0097     rtems_filesystem_eval_path_get_tokenlen( &ctx ),
0098     mode,
0099     dev
0100   );
0101 
0102   rtems_filesystem_eval_path_cleanup( &ctx );
0103 
0104   return rv;
0105 }