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#!/bin/sh
# sh is buggy on RS/6000 AIX 3.2. Replace above line with #!/bin/ksh
# Copyright (C) 1998, 2002, 2006-2007, 2009-2018 Free Software Foundation, Inc.
# Copyright (C) 1993 Jean-loup Gailly
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
case $1 in
--__cmp) shift
prog=cmp; cmp='${CMP-cmp}' ;;
*) prog=diff; cmp='${DIFF-diff}';;
esac
version="z$prog (gzip) 1.9
Copyright (C) 2009, 2011-2017 Free Software Foundation, Inc.
This is free software. You may redistribute copies of it under the terms of
the GNU General Public License <https://www.gnu.org/licenses/gpl.html>.
There is NO WARRANTY, to the extent permitted by law.
Written by Jean-loup Gailly."
usage="Usage: $0 [OPTION]... FILE1 [FILE2]
Compare FILE1 to FILE2, using their uncompressed contents if they are
compressed. If FILE2 is omitted, compare FILE1 to the uncompressed
contents of FILE1.gz. Do comparisons like '$prog' does.
OPTIONs are the same as for '$prog'.
Report bugs to <bug-gzip@gnu.org>."
# sed script to escape all ' for the shell, and then (to handle trailing
# newlines correctly) turn trailing X on last line into '.
escape='
s/'\''/'\''\\'\'''\''/g
$s/X$/'\''/
'
while :; do
case $1 in
--h*) printf '%s\n' "$usage" || exit 2; exit;;
--v*) printf '%s\n' "$version" || exit 2; exit;;
--) shift; break;;
-*\'*) cmp="$cmp '"`printf '%sX\n' "$1" | sed "$escape"`;;
-?*) cmp="$cmp '$1'";;
*) break;;
esac
shift
done
cmp="$cmp --"
for file
do
test "X$file" = X- || <"$file" || exit 2
done
gzip_status=0
exec 3>&1
if test $# -eq 1; then
case $1 in
*[-.]gz* | *[-.][zZ] | *.t[ga]z)
FILE=`expr "X$1" : 'X\(.*\)[-.][zZtga]*$'`
gzip_status=$(
exec 4>&1
(gzip -cd -- "$1" 4>&-; echo $? >&4) 3>&- | eval "$cmp" - '"$FILE"' >&3
);;
*)
printf >&2 '%s\n' "$0: $1: unknown compressed file extension"
exit 2;;
esac
elif test $# -eq 2; then
case "$1" in
*[-.]gz* | *[-.][zZ] | *.t[ga]z | -)
case "$2" in
*[-.]gz* | *[-.][zZ] | *.t[ga]z | -)
if test "$1$2" = --; then
gzip_status=$(
exec 4>&1
(gzip -cdfq - 4>&-; echo $? >&4) 3>&- |
eval "$cmp" - - >&3
)
elif
# Reject Solaris 8's buggy /bin/bash 2.03.
echo X |
(echo X | eval "$cmp" /dev/fd/5 - >/dev/null 2>&1) \
5<&0
then
gzip_status=$(
exec 4>&1
(gzip -cdfq -- "$1" 4>&-; echo $? >&4) 3>&- |
( (gzip -cdfq -- "$2" 4>&-; echo $? >&4) 3>&- 5<&- </dev/null |
eval "$cmp" /dev/fd/5 - >&3) 5<&0
)
cmp_status=$?
case $gzip_status in
*[1-9]*) gzip_status=1;;
*) gzip_status=0;;
esac
(exit $cmp_status)
else
tmp=
trap '
test -n "$tmp" && rm -f "$tmp"
(exit 2); exit 2
' HUP INT PIPE TERM 0
case $TMPDIR in
/ | /*/) ;;
/*) TMPDIR=$TMPDIR/;;
*) TMPDIR=/tmp/;;
esac
if type mktemp >/dev/null 2>&1; then
tmp=`mktemp "${TMPDIR}zdiffXXXXXXXXX"` ||
exit 2
else
set -C
tmp=${TMPDIR}zdiff$$
fi
gzip -cdfq -- "$2" > "$tmp" || exit 2
gzip_status=$(
exec 4>&1
(gzip -cdfq -- "$1" 4>&-; echo $? >&4) 3>&- |
eval "$cmp" - '"$tmp"' >&3
)
cmp_status=$?
rm -f "$tmp" || gzip_status=$?
trap - HUP INT PIPE TERM 0
(exit $cmp_status)
fi;;
*)
gzip_status=$(
exec 4>&1
(gzip -cdfq -- "$1" 4>&-; echo $? >&4) 3>&- |
eval "$cmp" - '"$2"' >&3
);;
esac;;
*) case "$2" in
*[-.]gz* | *[-.][zZ] | *.t[ga]z | -)
gzip_status=$(
exec 4>&1
(gzip -cdfq -- "$2" 4>&-; echo $? >&4) 3>&- |
eval "$cmp" '"$1"' - >&3
);;
*) eval "$cmp" '"$1"' '"$2"';;
esac;;
esac
else
printf >&2 '%s\n' \
"$0: invalid number of operands; try \`$0 --help' for help"
exit 2
fi
cmp_status=$?
test "$gzip_status" -eq 0 || exit 2
exit $cmp_status
........