lib/libc/compat/sys/compat_stat.c

   1 /*      $NetBSD: compat_stat.c,v 1.4 2013/10/04 21:07:37 christos Exp $ */
   2
   3 /*
   4  * Copyright (c) 1997 Frank van der Linden
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. All advertising materials mentioning features or use of this software
  16  *    must display the following acknowledgement:
  17  *      This product includes software developed for the NetBSD Project
  18  *      by Frank van der Linden
  19  * 4. The name of the author may not be used to endorse or promote products
  20  *    derived from this software without specific prior written permission
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  25  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  26  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  27  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  31  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #include <sys/cdefs.h>
  35 #if defined(LIBC_SCCS) && !defined(lint)
  36 __RCSID("$NetBSD: compat_stat.c,v 1.4 2013/10/04 21:07:37 christos Exp $");
  37 #endif /* LIBC_SCCS and not lint */
  38
  39 #define __LIBC12_SOURCE__
  40
  41 #include <sys/types.h>
  42 #include <sys/stat.h>
  43 #include <compat/sys/time.h>
  44 #include <compat/sys/stat.h>
  45
  46 __warn_references(stat,
  47     "warning: reference to compatibility stat(); include <sys/stat.h> to generate correct reference")
  48
  49 __warn_references(fstat,
  50     "warning: reference to compatibility fstat(); include <sys/stat.h> to generate correct reference")
  51
  52 __warn_references(lstat,
  53     "warning: reference to compatibility lstat(); include <sys/stat.h> to generate correct reference")
  54
  55 /*
  56  * Convert from a new to an old stat structure.
  57  */
  58
  59 static void cvtstat(const struct stat *, struct stat12 *);
  60
  61 __strong_alias(stat, __compat_stat)
  62 __strong_alias(lstat, __compat_lstat)
  63 __strong_alias(fstat, __compat_fstat)
  64
  65 static void
  66 cvtstat(const struct stat *st, struct stat12 *ost)
  67 {
  68
  69         ost->st_dev = (uint32_t)st->st_dev;
  70         ost->st_ino = (uint32_t)st->st_ino;
  71         ost->st_mode = st->st_mode;
  72         if (st->st_nlink >= (1 << 15))
  73                 ost->st_nlink = (1 << 15) - 1;
  74         else
  75                 ost->st_nlink = st->st_nlink;
  76         ost->st_uid = st->st_uid;
  77         ost->st_gid = st->st_gid;
  78         ost->st_rdev = (uint32_t)st->st_rdev;
  79         ost->st_atimespec.tv_sec = (int32_t)st->st_atimespec.tv_sec;
  80         ost->st_atimespec.tv_nsec = st->st_atimespec.tv_nsec;
  81         ost->st_mtimespec.tv_sec = (int32_t)st->st_mtimespec.tv_sec;
  82         ost->st_mtimespec.tv_nsec = st->st_mtimespec.tv_nsec;
  83         ost->st_ctimespec.tv_sec = (int32_t)st->st_ctimespec.tv_sec;
  84         ost->st_ctimespec.tv_nsec = st->st_ctimespec.tv_nsec;
  85         ost->st_size = st->st_size;
  86         ost->st_blocks = st->st_blocks;
  87         ost->st_blksize = st->st_blksize;
  88         ost->st_flags = st->st_flags;
  89         ost->st_gen = st->st_gen;
  90 }
  91
  92 int
  93 __compat_stat(const char *file, struct stat12 *ost)
  94 {
  95         struct stat nst;
  96         int ret;
  97
  98         if ((ret = __stat50(file, &nst)) < 0)
  99                 return ret;
 100         cvtstat(&nst, ost);
 101         return ret;
 102 }
 103
 104 int
 105 __compat_fstat(int f, struct stat12 *ost)
 106 {
 107         struct stat nst;
 108         int ret;
 109
 110         if ((ret = __fstat50(f, &nst)) < 0)
 111                 return ret;
 112         cvtstat(&nst, ost);
 113         return ret;
 114 }
 115
 116 int
 117 __compat_lstat(const char *file, struct stat12 *ost)
 118 {
 119         struct stat nst;
 120         int ret;
 121
 122         if ((ret = __lstat50(file, &nst)) < 0)
 123                 return ret;
 124         cvtstat(&nst, ost);
 125         return ret;
 126 }