usr.bin/find/ls.c

   1 /*
   2  * Copyright (c) 1989, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  * @(#)ls.c     8.1 (Berkeley) 6/6/93
  34  * $FreeBSD: src/usr.bin/find/ls.c,v 1.17 2004/01/20 09:27:03 des Exp $
  35  * $DragonFly: src/usr.bin/find/ls.c,v 1.6 2005/02/22 01:52:44 joerg Exp $
  36  */
  37
  38 #include <sys/param.h>
  39 #include <sys/stat.h>
  40
  41 #include <err.h>
  42 #include <errno.h>
  43 #include <fts.h>
  44 #include <grp.h>
  45 #include <inttypes.h>
  46 #include <langinfo.h>
  47 #include <pwd.h>
  48 #include <stdio.h>
  49 #include <stdlib.h>
  50 #include <string.h>
  51 #include <time.h>
  52 #include <unistd.h>
  53
  54 #include "find.h"
  55
  56 #ifndef PRId64
  57 #define PRId64 "lld"
  58 #endif
  59
  60 /* Derived from the print routines in the ls(1) source code. */
  61
  62 static void printlink(char *);
  63 static void printtime(time_t);
  64
  65 void
  66 printlong(char *name, char *accpath, struct stat *sb)
  67 {
  68         char modep[15];
  69
  70         printf("%6lu %8"PRId64" ", (u_long) sb->st_ino, sb->st_blocks);
  71         strmode(sb->st_mode, modep);
  72         printf("%s %3u %-*s %-*s ", modep, sb->st_nlink, MAXLOGNAME - 1,
  73             user_from_uid(sb->st_uid, 0), MAXLOGNAME - 1,
  74             group_from_gid(sb->st_gid, 0));
  75
  76         if (S_ISCHR(sb->st_mode) || S_ISBLK(sb->st_mode))
  77                 printf("%3d, %3d ", major(sb->st_rdev),
  78                     minor(sb->st_rdev));
  79         else
  80                 printf("%8"PRId64" ", sb->st_size);
  81         printtime(sb->st_mtime);
  82         printf("%s", name);
  83         if (S_ISLNK(sb->st_mode))
  84                 printlink(accpath);
  85         putchar('\n');
  86 }
  87
  88 static void
  89 printtime(time_t ftime)
  90 {
  91         char longstring[80];
  92         static time_t lnow;
  93         const char *format;
  94         static int d_first = -1;
  95
  96         if (d_first < 0)
  97                 d_first = (*nl_langinfo(D_MD_ORDER) == 'd');
  98         if (lnow == 0)
  99                 lnow = time(NULL);
 100
 101 #define SIXMONTHS       ((365 / 2) * 86400)
 102         if (ftime + SIXMONTHS > lnow && ftime < lnow + SIXMONTHS)
 103                 /* mmm dd hh:mm || dd mmm hh:mm */
 104                 format = d_first ? "%e %b %R " : "%b %e %R ";
 105         else
 106                 /* mmm dd  yyyy || dd mmm  yyyy */
 107                 format = d_first ? "%e %b  %Y " : "%b %e  %Y ";
 108         strftime(longstring, sizeof(longstring), format, localtime(&ftime));
 109         fputs(longstring, stdout);
 110 }
 111
 112 static void
 113 printlink(char *name)
 114 {
 115         int lnklen;
 116         char path[MAXPATHLEN];
 117
 118         if ((lnklen = readlink(name, path, MAXPATHLEN - 1)) == -1) {
 119                 warn("%s", name);
 120                 return;
 121         }
 122         path[lnklen] = '\0';
 123         printf(" -> %s", path);
 124 }