tls.c

   1 /* -*- c-file-style: "linux" -*-
   2  *
   3  * Copyright (C) 2001, 2002 by Martin Pool <mbp@samba.org>
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License version
   7  * 2 as published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17  */
  18
  19 /**
  20  * @file tls.c
  21  *
  22  * Trivial @c ls for comparing two directories after running an rsync.
  23  *
  24  * The problem with using the system's own ls is that some features
  25  * have little quirks that make directories look different when for
  26  * our purposes they're the same -- for example, the BSD braindamage
  27  * about setting the mode on symlinks based on your current umask.
  28  *
  29  * All the filenames must be given on the command line -- tls does not
  30  * even read directories, let alone recurse.  The typical usage is
  31  * "find|sort|xargs tls".
  32  *
  33  * The format is not exactly the same as any particular Unix ls(1).
  34  *
  35  * A key requirement for this program is that the output be "very
  36  * reproducible."  So we mask away information that can accidentally
  37  * change.
  38  **/
  39
  40
  41 #include "rsync.h"
  42
  43 #define PROGRAM "tls"
  44
  45 /* These are to make syscall.o shut up. */
  46 int dry_run = 0;
  47 int read_only = 1;
  48 int list_only = 0;
  49 int preserve_perms = 0;
  50
  51
  52 static void failed(char const *what, char const *where)
  53 {
  54         fprintf(stderr, PROGRAM ": %s %s: %s\n",
  55                 what, where, strerror(errno));
  56         exit(1);
  57 }
  58
  59
  60
  61 static void list_file(const char *fname)
  62 {
  63         STRUCT_STAT buf;
  64         char permbuf[PERMSTRING_SIZE];
  65         struct tm *mt;
  66         char datebuf[50];
  67         char linkbuf[4096];
  68
  69         if (do_lstat(fname, &buf) < 0)
  70                 failed("stat", fname);
  71
  72         /* The size of anything but a regular file is probably not
  73          * worth thinking about. */
  74         if (!S_ISREG(buf.st_mode))
  75                 buf.st_size = 0;
  76
  77         /* On some BSD platforms the mode bits of a symlink are
  78          * undefined.  Also it tends not to be possible to reset a
  79          * symlink's mtime, so we have to ignore it too. */
  80         if (S_ISLNK(buf.st_mode)) {
  81                 int len;
  82                 buf.st_mode &= ~0777;
  83                 buf.st_mtime = (time_t)0;
  84                 buf.st_uid = buf.st_gid = 0;
  85                 strcpy(linkbuf, " -> ");
  86                 /* const-cast required for silly UNICOS headers */
  87                 len = readlink((char *) fname, linkbuf+4, sizeof(linkbuf) - 4);
  88                 if (len == -1)
  89                         failed("readlink", fname);
  90                 else
  91                         /* it's not nul-terminated */
  92                         linkbuf[4+len] = 0;
  93         } else {
  94                 linkbuf[0] = 0;
  95         }
  96
  97         permstring(permbuf, buf.st_mode);
  98
  99         if (buf.st_mtime) {
 100                 mt = gmtime(&buf.st_mtime);
 101
 102                 sprintf(datebuf, "%04d-%02d-%02d %02d:%02d:%02d",
 103                         mt->tm_year + 1900,
 104                         mt->tm_mon + 1,
 105                         mt->tm_mday,
 106                         mt->tm_hour,
 107                         mt->tm_min,
 108                         mt->tm_sec);
 109         } else {
 110                 strcpy(datebuf, "                   ");
 111         }
 112
 113         /* TODO: Perhaps escape special characters in fname? */
 114
 115         printf("%s ", permbuf);
 116         if (S_ISCHR(buf.st_mode) || S_ISBLK(buf.st_mode)) {
 117                 printf("%5ld,%6ld",
 118                     (long)major(buf.st_rdev),
 119                     (long)minor(buf.st_rdev));
 120         } else /* NB: use double for size since it might not fit in a long. */
 121                 printf("%12.0f", (double)buf.st_size);
 122         printf(" %6ld.%-6ld %6ld %s %s%s\n",
 123                (long)buf.st_uid, (long)buf.st_gid, (long)buf.st_nlink,
 124                datebuf, fname, linkbuf);
 125 }
 126
 127
 128 int
 129 main(int argc, char *argv[])
 130 {
 131         if (argc < 2) {
 132                 fprintf(stderr, "usage: " PROGRAM " DIR ...\n"
 133                         "Trivial file listing program for portably checking rsync\n");
 134                 return 1;
 135         }
 136
 137         for (argv++; *argv; argv++) {
 138                 list_file(*argv);
 139         }
 140
 141         return 0;
 142 }