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      1 /*	$NetBSD: compat_statvfs.c,v 1.1 2019/09/22 22:59:38 christos Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2019 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Christos Zoulas
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 
     33 #include <sys/cdefs.h>
     34 #if defined(LIBC_SCCS) && !defined(lint)
     35 __RCSID("$NetBSD: compat_statvfs.c,v 1.1 2019/09/22 22:59:38 christos Exp $");
     36 #endif /* LIBC_SCCS and not lint */
     37 
     38 #define __LIBC12_SOURCE__
     39 
     40 #include <stdlib.h>
     41 #include <sys/types.h>
     42 #include <sys/statvfs.h>
     43 #include <compat/include/fstypes.h>
     44 #include <compat/sys/statvfs.h>
     45 
     46 __warn_references(statvfs,
     47     "warning: reference to compatibility statvfs(); include <sys/statvfs.h> to generate correct reference")
     48 __warn_references(statvfs1,
     49     "warning: reference to compatibility statvfs1(); include <sys/statvfs.h> to generate correct reference")
     50 
     51 __warn_references(fstatvfs,
     52     "warning: reference to compatibility fstatvfs(); include <sys/statvfs.h> to generate correct reference")
     53 __warn_references(fstatvfs1,
     54     "warning: reference to compatibility fstatvfs1(); include <sys/statvfs.h> to generate correct reference")
     55 
     56 __warn_references(getvfsstat,
     57     "warning: reference to compatibility getvfsstat(); include <sys/statvfs.h> to generate correct reference")
     58 
     59 __strong_alias(statvfs, __compat_statvfs)
     60 __strong_alias(statvfs1, __compat_statvfs1)
     61 __strong_alias(fstatvfs, __compat_fstatvfs)
     62 __strong_alias(fstatvfs1, __compat_fstatvfs1)
     63 __strong_alias(getvfsstat, __compat_getvfsstat)
     64 
     65 int
     66 __compat_statvfs(const char *path, struct statvfs90 *buf)
     67 {
     68 	struct statvfs sb;
     69 	int error = __statvfs190(path, &sb, 0);
     70 	if (error != -1)
     71 		statvfs_to_statvfs90(&sb, buf);
     72 	return error;
     73 }
     74 
     75 int
     76 __compat_statvfs1(const char *path, struct statvfs90 *buf, int flags)
     77 {
     78 	struct statvfs sb;
     79 	int error = __statvfs190(path, &sb, flags);
     80 	if (error != -1)
     81 		statvfs_to_statvfs90(&sb, buf);
     82 	return error;
     83 }
     84 
     85 int
     86 __compat_fstatvfs(int fd, struct statvfs90 *buf)
     87 {
     88 	struct statvfs sb;
     89 	int error = __fstatvfs190(fd, &sb, 0);
     90 	if (error != -1)
     91 		statvfs_to_statvfs90(&sb, buf);
     92 	return error;
     93 }
     94 
     95 int
     96 __compat_fstatvfs1(int fd, struct statvfs90 *buf, int flags)
     97 {
     98 	struct statvfs sb;
     99 	int error = __fstatvfs190(fd, &sb, flags);
    100 	if (error != -1)
    101 		statvfs_to_statvfs90(&sb, buf);
    102 	return error;
    103 }
    104 
    105 int
    106 __compat_getvfsstat(struct statvfs90 *buf, size_t size, int flags)
    107 {
    108 	size_t count = size / sizeof(*buf);
    109 	struct statvfs *sb = calloc(count, sizeof(*sb));
    110 
    111 	if (sb == NULL)
    112 		return -1;
    113 
    114 	int error = __getvfsstat90(sb, count * sizeof(*sb), flags);
    115 	if (error != -1) {
    116 		for (size_t i = 0; i < count; i++)
    117 			statvfs_to_statvfs90(sb + i, buf + i);
    118 	}
    119 	free(sb);
    120 	return error;
    121 }
    122