bin/ls/cmp.c

   1 /*      $NetBSD: cmp.c,v 1.17 2003/08/07 09:05:14 agc Exp $     */
   2
   3 /*
   4  * Copyright (c) 1989, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * This code is derived from software contributed to Berkeley by
   8  * Michael Fischbein.
   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  * 3. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  */
  34
  35 #include <sys/cdefs.h>
  36 #ifndef lint
  37 #if 0
  38 static char sccsid[] = "@(#)cmp.c       8.1 (Berkeley) 5/31/93";
  39 #else
  40 __RCSID("$NetBSD: cmp.c,v 1.17 2003/08/07 09:05:14 agc Exp $");
  41 #endif
  42 #endif /* not lint */
  43
  44 #include <sys/types.h>
  45 #include <sys/stat.h>
  46
  47 #include <fts.h>
  48 #include <string.h>
  49
  50 #include "ls.h"
  51 #include "extern.h"
  52
  53 #if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) || \
  54     defined(_XOPEN_SOURCE) || defined(__NetBSD__)
  55 #define ATIMENSEC_CMP(x, op, y) ((x)->st_atimensec op (y)->st_atimensec)
  56 #define CTIMENSEC_CMP(x, op, y) ((x)->st_ctimensec op (y)->st_ctimensec)
  57 #define MTIMENSEC_CMP(x, op, y) ((x)->st_mtimensec op (y)->st_mtimensec)
  58 #else
  59 #define ATIMENSEC_CMP(x, op, y) \
  60         ((x)->st_atimespec.tv_nsec op (y)->st_atimespec.tv_nsec)
  61 #define CTIMENSEC_CMP(x, op, y) \
  62         ((x)->st_ctimespec.tv_nsec op (y)->st_ctimespec.tv_nsec)
  63 #define MTIMENSEC_CMP(x, op, y) \
  64         ((x)->st_mtimespec.tv_nsec op (y)->st_mtimespec.tv_nsec)
  65 #endif
  66
  67 int
  68 namecmp(const FTSENT *a, const FTSENT *b)
  69 {
  70
  71         return (strcmp(a->fts_name, b->fts_name));
  72 }
  73
  74 int
  75 revnamecmp(const FTSENT *a, const FTSENT *b)
  76 {
  77
  78         return (strcmp(b->fts_name, a->fts_name));
  79 }
  80
  81 int
  82 modcmp(const FTSENT *a, const FTSENT *b)
  83 {
  84
  85         if (b->fts_statp->st_mtime > a->fts_statp->st_mtime)
  86                 return (1);
  87         else if (b->fts_statp->st_mtime < a->fts_statp->st_mtime)
  88                 return (-1);
  89         else if (MTIMENSEC_CMP(b->fts_statp, >, a->fts_statp))
  90                 return (1);
  91         else if (MTIMENSEC_CMP(b->fts_statp, <, a->fts_statp))
  92                 return (-1);
  93         else
  94                 return (namecmp(a, b));
  95 }
  96
  97 int
  98 revmodcmp(const FTSENT *a, const FTSENT *b)
  99 {
 100
 101         if (b->fts_statp->st_mtime > a->fts_statp->st_mtime)
 102                 return (-1);
 103         else if (b->fts_statp->st_mtime < a->fts_statp->st_mtime)
 104                 return (1);
 105         else if (MTIMENSEC_CMP(b->fts_statp, >, a->fts_statp))
 106                 return (-1);
 107         else if (MTIMENSEC_CMP(b->fts_statp, <, a->fts_statp))
 108                 return (1);
 109         else
 110                 return (revnamecmp(a, b));
 111 }
 112
 113 int
 114 acccmp(const FTSENT *a, const FTSENT *b)
 115 {
 116
 117         if (b->fts_statp->st_atime > a->fts_statp->st_atime)
 118                 return (1);
 119         else if (b->fts_statp->st_atime < a->fts_statp->st_atime)
 120                 return (-1);
 121         else if (ATIMENSEC_CMP(b->fts_statp, >, a->fts_statp))
 122                 return (1);
 123         else if (ATIMENSEC_CMP(b->fts_statp, <, a->fts_statp))
 124                 return (-1);
 125         else
 126                 return (namecmp(a, b));
 127 }
 128
 129 int
 130 revacccmp(const FTSENT *a, const FTSENT *b)
 131 {
 132
 133         if (b->fts_statp->st_atime > a->fts_statp->st_atime)
 134                 return (-1);
 135         else if (b->fts_statp->st_atime < a->fts_statp->st_atime)
 136                 return (1);
 137         else if (ATIMENSEC_CMP(b->fts_statp, >, a->fts_statp))
 138                 return (-1);
 139         else if (ATIMENSEC_CMP(b->fts_statp, <, a->fts_statp))
 140                 return (1);
 141         else
 142                 return (revnamecmp(a, b));
 143 }
 144
 145 int
 146 statcmp(const FTSENT *a, const FTSENT *b)
 147 {
 148
 149         if (b->fts_statp->st_ctime > a->fts_statp->st_ctime)
 150                 return (1);
 151         else if (b->fts_statp->st_ctime < a->fts_statp->st_ctime)
 152                 return (-1);
 153         else if (CTIMENSEC_CMP(b->fts_statp, >, a->fts_statp))
 154                 return (1);
 155         else if (CTIMENSEC_CMP(b->fts_statp, <, a->fts_statp))
 156                 return (-1);
 157         else
 158                 return (namecmp(a, b));
 159 }
 160
 161 int
 162 revstatcmp(const FTSENT *a, const FTSENT *b)
 163 {
 164
 165         if (b->fts_statp->st_ctime > a->fts_statp->st_ctime)
 166                 return (-1);
 167         else if (b->fts_statp->st_ctime < a->fts_statp->st_ctime)
 168                 return (1);
 169         else if (CTIMENSEC_CMP(b->fts_statp, >, a->fts_statp))
 170                 return (-1);
 171         else if (CTIMENSEC_CMP(b->fts_statp, <, a->fts_statp))
 172                 return (1);
 173         else
 174                 return (revnamecmp(a, b));
 175 }
 176
 177 int
 178 sizecmp(const FTSENT *a, const FTSENT *b)
 179 {
 180
 181         if (b->fts_statp->st_size > a->fts_statp->st_size)
 182                 return (1);
 183         if (b->fts_statp->st_size < a->fts_statp->st_size)
 184                 return (-1);
 185         else
 186                 return (namecmp(a, b));
 187 }
 188
 189 int
 190 revsizecmp(const FTSENT *a, const FTSENT *b)
 191 {
 192
 193         if (b->fts_statp->st_size > a->fts_statp->st_size)
 194                 return (-1);
 195         if (b->fts_statp->st_size < a->fts_statp->st_size)
 196                 return (1);
 197         else
 198                 return (revnamecmp(a, b));
 199 }