zdiff.in

   1 #!/bin/sh
   2 # sh is buggy on RS/6000 AIX 3.2. Replace above line with #!/bin/ksh
   3
   4 # Copyright (C) 1998, 2002, 2006-2007, 2009-2015 Free Software Foundation,
   5 # Inc.
   6 # Copyright (C) 1993 Jean-loup Gailly
   7
   8 # This program is free software; you can redistribute it and/or modify
   9 # it under the terms of the GNU General Public License as published by
  10 # the Free Software Foundation; either version 3 of the License, or
  11 # (at your option) any later version.
  12
  13 # This program is distributed in the hope that it will be useful,
  14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 # GNU General Public License for more details.
  17
  18 # You should have received a copy of the GNU General Public License along
  19 # with this program; if not, write to the Free Software Foundation, Inc.,
  20 # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  21
  22 bindir=@bindir@
  23 case $1 in
  24 --__bindir) bindir=${2?}; shift; shift;;
  25 esac
  26 PATH=$bindir:$PATH
  27
  28 case $1 in
  29   --__cmp) shift
  30         prog=cmp;  cmp='${CMP-cmp}'  ;;
  31   *)    prog=diff; cmp='${DIFF-diff}';;
  32 esac
  33
  34 version="z$prog (gzip) @VERSION@
  35 Copyright (C) 2009, 2011-2015 Free Software Foundation, Inc.
  36 This is free software.  You may redistribute copies of it under the terms of
  37 the GNU General Public License <http://www.gnu.org/licenses/gpl.html>.
  38 There is NO WARRANTY, to the extent permitted by law.
  39
  40 Written by Jean-loup Gailly."
  41
  42 usage="Usage: $0 [OPTION]... FILE1 [FILE2]
  43 Compare FILE1 to FILE2, using their uncompressed contents if they are
  44 compressed.  If FILE2 is omitted, compare FILE1 to the uncompressed
  45 contents of FILE1.gz.  Do comparisons like '$prog' does.
  46
  47 OPTIONs are the same as for '$prog'.
  48
  49 Report bugs to <bug-gzip@gnu.org>."
  50
  51 # sed script to escape all ' for the shell, and then (to handle trailing
  52 # newlines correctly) turn trailing X on last line into '.
  53 escape='
  54   s/'\''/'\''\\'\'''\''/g
  55   $s/X$/'\''/
  56 '
  57
  58 while :; do
  59   case $1 in
  60   --h*) printf '%s\n' "$usage" || exit 2; exit;;
  61   --v*) echo "$version" || exit 2; exit;;
  62   --) shift; break;;
  63   -*\'*) cmp="$cmp '"`printf '%sX\n' "$1" | sed "$escape"`;;
  64   -?*) cmp="$cmp '$1'";;
  65   *) break;;
  66   esac
  67   shift
  68 done
  69 cmp="$cmp --"
  70
  71 for file
  72 do
  73   test "X$file" = X- || <"$file" || exit 2
  74 done
  75
  76 gzip_status=0
  77 exec 3>&1
  78
  79 if test $# -eq 1; then
  80   case $1 in
  81   *[-.]gz* | *[-.][zZ] | *.t[ga]z)
  82     FILE=`expr "X$1" : 'X\(.*\)[-.][zZtga]*$'`
  83     gzip_status=$(
  84       exec 4>&1
  85       (gzip -cd -- "$1" 4>&-; echo $? >&4) 3>&- | eval "$cmp" - '"$FILE"' >&3
  86     );;
  87   *)
  88     echo >&2 "$0: $1: unknown compressed file extension"
  89     exit 2;;
  90   esac
  91 elif test $# -eq 2; then
  92         case "$1" in
  93         *[-.]gz* | *[-.][zZ] | *.t[ga]z | -)
  94                 case "$2" in
  95                 *[-.]gz* | *[-.][zZ] | *.t[ga]z | -)
  96                     if test "$1$2" = --; then
  97                         gzip_status=$(
  98                           exec 4>&1
  99                           (gzip -cdfq - 4>&-; echo $? >&4) 3>&- |
 100                             eval "$cmp" - - >&3
 101                         )
 102                     elif
 103                         # Reject Solaris 8's buggy /bin/bash 2.03.
 104                         echo X |
 105                          (echo X | eval "$cmp" /dev/fd/5 - >/dev/null 2>&1) \
 106                                 5<&0
 107                     then
 108                         gzip_status=$(
 109                           exec 4>&1
 110                           (gzip -cdfq -- "$1" 4>&-; echo $? >&4) 3>&- |
 111                             ( (gzip -cdfq -- "$2" 4>&-; echo $? >&4) 3>&- 5<&- </dev/null |
 112                                eval "$cmp" /dev/fd/5 - >&3) 5<&0
 113                         )
 114                         cmp_status=$?
 115                         case $gzip_status in
 116                           *[1-9]*) gzip_status=1;;
 117                           *) gzip_status=0;;
 118                         esac
 119                         (exit $cmp_status)
 120                     else
 121                         F=`expr "/$2" : '.*/\(.*\)[-.][zZtga]*$'` || F=$prog
 122                         tmp=
 123                         trap '
 124                           test -n "$tmp" && rm -f "$tmp"
 125                           (exit 2); exit 2
 126                         ' HUP INT PIPE TERM 0
 127                         if type mktemp >/dev/null 2>&1; then
 128                           tmp=`mktemp -t -- "$F.XXXXXX"` || exit 2
 129                         else
 130                           set -C
 131                           tmp=${TMPDIR-/tmp}/$F.$$
 132                         fi
 133                         gzip -cdfq -- "$2" > "$tmp" || exit 2
 134                         gzip_status=$(
 135                           exec 4>&1
 136                           (gzip -cdfq -- "$1" 4>&-; echo $? >&4) 3>&- |
 137                             eval "$cmp" - '"$tmp"' >&3
 138                         )
 139                         cmp_status=$?
 140                         rm -f "$tmp" || gzip_status=$?
 141                         trap - HUP INT PIPE TERM 0
 142                         (exit $cmp_status)
 143                     fi;;
 144                 *)
 145                     gzip_status=$(
 146                       exec 4>&1
 147                       (gzip -cdfq -- "$1" 4>&-; echo $? >&4) 3>&- |
 148                         eval "$cmp" - '"$2"' >&3
 149                     );;
 150                 esac;;
 151         *)      case "$2" in
 152                 *[-.]gz* | *[-.][zZ] | *.t[ga]z | -)
 153                         gzip_status=$(
 154                           exec 4>&1
 155                           (gzip -cdfq -- "$2" 4>&-; echo $? >&4) 3>&- |
 156                             eval "$cmp" '"$1"' - >&3
 157                         );;
 158                 *)      eval "$cmp" '"$1"' '"$2"';;
 159                 esac;;
 160         esac
 161 else
 162         echo >&2 "$0: invalid number of operands; try \`$0 --help' for help"
 163         exit 2
 164 fi
 165
 166 cmp_status=$?
 167 test "$gzip_status" -eq 0 || exit 2
 168 exit $cmp_status