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. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * @(#)ls.c     8.1 (Berkeley) 6/6/93
  30  * $FreeBSD: head/usr.bin/find/ls.c 241015 2012-09-27 23:31:19Z mdf $
  31  */
  32
  33 #include <sys/param.h>
  34 #include <sys/stat.h>
  35
  36 #include <err.h>
  37 #include <errno.h>
  38 #include <fts.h>
  39 #include <grp.h>
  40 #include <inttypes.h>
  41 #include <langinfo.h>
  42 #include <pwd.h>
  43 #include <stdio.h>
  44 #include <string.h>
  45 #include <time.h>
  46 #include <unistd.h>
  47
  48 #include "find.h"
  49
  50 /* Derived from the print routines in the ls(1) source code. */
  51
  52 static void printlink(char *);
  53 static void printtime(time_t);
  54
  55 void
  56 printlong(char *name, char *accpath, struct stat *sb)
  57 {
  58         char modep[15];
  59
  60         (void)printf("%6ju %8"PRId64" ", (uintmax_t)sb->st_ino, sb->st_blocks);
  61         (void)strmode(sb->st_mode, modep);
  62         (void)printf("%s %3u %-*s %-*s ", modep, sb->st_nlink, MAXLOGNAME - 1,
  63             user_from_uid(sb->st_uid, 0), MAXLOGNAME - 1,
  64             group_from_gid(sb->st_gid, 0));
  65
  66         if (S_ISCHR(sb->st_mode) || S_ISBLK(sb->st_mode))
  67                 (void)printf("%#8jx ", (uintmax_t)sb->st_rdev);
  68         else
  69                 (void)printf("%8"PRId64" ", sb->st_size);
  70         printtime(sb->st_mtime);
  71         (void)printf("%s", name);
  72         if (S_ISLNK(sb->st_mode))
  73                 printlink(accpath);
  74         (void)putchar('\n');
  75 }
  76
  77 static void
  78 printtime(time_t ftime)
  79 {
  80         char longstring[80];
  81         static time_t lnow;
  82         const char *format;
  83         static int d_first = -1;
  84
  85         if (d_first < 0)
  86                 d_first = (*nl_langinfo(D_MD_ORDER) == 'd');
  87         if (lnow == 0)
  88                 lnow = time(NULL);
  89
  90 #define SIXMONTHS       ((365 / 2) * 86400)
  91         if (ftime + SIXMONTHS > lnow && ftime < lnow + SIXMONTHS)
  92                 /* mmm dd hh:mm || dd mmm hh:mm */
  93                 format = d_first ? "%e %b %R " : "%b %e %R ";
  94         else
  95                 /* mmm dd  yyyy || dd mmm  yyyy */
  96                 format = d_first ? "%e %b  %Y " : "%b %e  %Y ";
  97         strftime(longstring, sizeof(longstring), format, localtime(&ftime));
  98         fputs(longstring, stdout);
  99 }
 100
 101 static void
 102 printlink(char *name)
 103 {
 104         int lnklen;
 105         char path[MAXPATHLEN];
 106
 107         if ((lnklen = readlink(name, path, MAXPATHLEN - 1)) == -1) {
 108                 warn("%s", name);
 109                 return;
 110         }
 111         path[lnklen] = '\0';
 112         (void)printf(" -> %s", path);
 113 }