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      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 }
    127