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#!/bin/sh
# sh is buggy on RS/6000 AIX 3.2. Replace above line with #!/bin/ksh
# Zcmp and zdiff are used to invoke the cmp or the diff pro-
# gram on compressed files. All options specified are passed
# directly to cmp or diff. If only 1 file is specified, then
# the files compared are file1 and an uncompressed file1.gz.
# If two files are specified, then they are uncompressed (if
# necessary) and fed to cmp or diff. The exit status from cmp
# or diff is preserved.
prog=`echo $0 | sed 's|.*/||'`
case "$prog" in
*cmp) comp=${CMP-cmp} ;;
*) comp=${DIFF-diff} ;;
esac
OPTIONS=
FILES=
for ARG
do
case "$ARG" in
-*) OPTIONS="$OPTIONS $ARG";;
*) if test -f "$ARG"; then
FILES="$FILES $ARG"
else
echo "${prog}: $ARG not found or not a regular file"
exit 1
fi ;;
esac
done
if test -z "$FILES"; then
echo "Usage: $prog [${comp}_options] file [file]"
exit 1
fi
set $FILES
if test $# -eq 1; then
FILE=`echo "$1" | sed 's/[-.][zZtga]*$//'`
gzip -cd "$1" | $comp $OPTIONS - "$FILE"
STAT="$?"
elif test $# -eq 2; then
case "$1" in
*[-.]gz* | *[-.][zZ] | *.t[ga]z)
case "$2" in
*[-.]gz* | *[-.][zZ] | *.t[ga]z)
F=`echo "$2" | sed 's|.*/||;s|[-.][zZtga]*||'`
gzip -cdfq "$2" > /tmp/"$F".$$
gzip -cdfq "$1" | $comp $OPTIONS - /tmp/"$F".$$
STAT="$?"
/bin/rm -f /tmp/"$F".$$;;
*) gzip -cdfq "$1" | $comp $OPTIONS - "$2"
STAT="$?";;
esac;;
*) case "$2" in
*[-.]gz* | *[-.][zZ] | *.t[ga]z)
gzip -cdfq "$2" | $comp $OPTIONS "$1" -
STAT="$?";;
*) $comp $OPTIONS "$1" "$2"
STAT="$?";;
esac;;
esac
exit "$STAT"
else
echo "Usage: $prog [${comp}_options] file [file]"
exit 1
fi
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