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      1 /*	$NetBSD: compat_stat.c,v 1.5 2026/01/02 22:22:21 nia 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. The name of the author may not be used to endorse or promote products
     16  *    derived from this software without specific prior written permission
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     23  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     28  */
     29 
     30 #include <sys/cdefs.h>
     31 #if defined(LIBC_SCCS) && !defined(lint)
     32 __RCSID("$NetBSD: compat_stat.c,v 1.5 2026/01/02 22:22:21 nia Exp $");
     33 #endif /* LIBC_SCCS and not lint */
     34 
     35 #define __LIBC12_SOURCE__
     36 
     37 #include <sys/types.h>
     38 #include <sys/stat.h>
     39 #include <compat/sys/time.h>
     40 #include <compat/sys/stat.h>
     41 
     42 __warn_references(stat,
     43     "warning: reference to compatibility stat(); include <sys/stat.h> to generate correct reference")
     44 
     45 __warn_references(fstat,
     46     "warning: reference to compatibility fstat(); include <sys/stat.h> to generate correct reference")
     47 
     48 __warn_references(lstat,
     49     "warning: reference to compatibility lstat(); include <sys/stat.h> to generate correct reference")
     50 
     51 /*
     52  * Convert from a new to an old stat structure.
     53  */
     54 
     55 static void cvtstat(const struct stat *, struct stat12 *);
     56 
     57 __strong_alias(stat, __compat_stat)
     58 __strong_alias(lstat, __compat_lstat)
     59 __strong_alias(fstat, __compat_fstat)
     60 
     61 static void
     62 cvtstat(const struct stat *st, struct stat12 *ost)
     63 {
     64 
     65 	ost->st_dev = (uint32_t)st->st_dev;
     66 	ost->st_ino = (uint32_t)st->st_ino;
     67 	ost->st_mode = st->st_mode;
     68 	if (st->st_nlink >= (1 << 15))
     69 		ost->st_nlink = (1 << 15) - 1;
     70 	else
     71 		ost->st_nlink = st->st_nlink;
     72 	ost->st_uid = st->st_uid;
     73 	ost->st_gid = st->st_gid;
     74 	ost->st_rdev = (uint32_t)st->st_rdev;
     75 	ost->st_atimespec.tv_sec = (int32_t)st->st_atimespec.tv_sec;
     76 	ost->st_atimespec.tv_nsec = st->st_atimespec.tv_nsec;
     77 	ost->st_mtimespec.tv_sec = (int32_t)st->st_mtimespec.tv_sec;
     78 	ost->st_mtimespec.tv_nsec = st->st_mtimespec.tv_nsec;
     79 	ost->st_ctimespec.tv_sec = (int32_t)st->st_ctimespec.tv_sec;
     80 	ost->st_ctimespec.tv_nsec = st->st_ctimespec.tv_nsec;
     81 	ost->st_size = st->st_size;
     82 	ost->st_blocks = st->st_blocks;
     83 	ost->st_blksize = st->st_blksize;
     84 	ost->st_flags = st->st_flags;
     85 	ost->st_gen = st->st_gen;
     86 }
     87 
     88 int
     89 __compat_stat(const char *file, struct stat12 *ost)
     90 {
     91 	struct stat nst;
     92 	int ret;
     93 
     94 	if ((ret = __stat50(file, &nst)) < 0)
     95 		return ret;
     96 	cvtstat(&nst, ost);
     97 	return ret;
     98 }
     99 
    100 int
    101 __compat_fstat(int f, struct stat12 *ost)
    102 {
    103 	struct stat nst;
    104 	int ret;
    105 
    106 	if ((ret = __fstat50(f, &nst)) < 0)
    107 		return ret;
    108 	cvtstat(&nst, ost);
    109 	return ret;
    110 }
    111 
    112 int
    113 __compat_lstat(const char *file, struct stat12 *ost)
    114 {
    115 	struct stat nst;
    116 	int ret;
    117 
    118 	if ((ret = __lstat50(file, &nst)) < 0)
    119 		return ret;
    120 	cvtstat(&nst, ost);
    121 	return ret;
    122 }
    123