-:
#!/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.
-
-PATH="BINDIR:$PATH"; export PATH
-prog=`echo $0 | sed 's|.*/||'`
-case "$prog" in
- *cmp) comp=${CMP-cmp} ;;
- *) comp=${DIFF-diff} ;;
+# Copyright (C) 1998, 2002, 2006, 2007 Free Software Foundation
+# 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 2 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.
+
+PATH=BINDIR:$PATH
+
+case $1 in
+ --__cmp) shift
+ prog=cmp; cmp='${CMP-cmp}' ;;
+ *) prog=diff; cmp='${DIFF-diff}';;
esac
-OPTIONS=
-FILES=
-for ARG
+version="z$prog (gzip) @VERSION@
+Copyright (C) 2007 Free Software Foundation, Inc.
+This is free software. You may redistribute copies of it under the terms of
+the GNU General Public License <http://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*) echo "$version" || exit 2; exit;;
+ --) shift; break;;
+ -*\'*) cmp="$cmp '"`printf '%sX\n' "$1" | sed "$escape"`;;
+ -?*) cmp="$cmp '$1'";;
+ *) break;;
+ esac
+ shift
+done
+cmp="$cmp --"
+
+for file
do
- case "$ARG" in
- -*) OPTIONS="$OPTIONS $ARG";;
- *) if test -f "$ARG"; then
- FILES="$FILES $ARG"
- else
- echo "${prog}: $ARG not found or not a regular file"
- exit 2
- fi ;;
- esac
+ test "X$file" = X- || <"$file" || exit 2
done
-if test -z "$FILES"; then
- echo "Usage: $prog [${comp}_options] file [file]"
- exit 2
-fi
-set $FILES
-if test $# -eq 1; then
- FILE=`echo "$1" | sed 's/[-.][zZtga]*$//'`
- gzip -cd "$1" | $comp $OPTIONS - "$FILE"
+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
+ );;
+ *)
+ echo >&2 "$0: $1: unknown compressed file extension"
+ exit 2;;
+ esac
elif test $# -eq 2; then
case "$1" in
- *[-.]gz* | *[-.][zZ] | *.t[ga]z)
+ *[-.]gz* | *[-.][zZ] | *.t[ga]z | -)
case "$2" in
- *[-.]gz* | *[-.][zZ] | *.t[ga]z)
- F=`echo "$2" | sed 's|.*/||;s|[-.][zZtga]*||'`
- set -C
- trap 'rm -f /tmp/"$F".$$; exit 2' 1 2 13 15 0
- gzip -cdfq "$2" > /tmp/"$F".$$ || exit
- gzip -cdfq "$1" | $comp $OPTIONS - /tmp/"$F".$$
- STAT="$?"
- /bin/rm -f /tmp/"$F".$$ || STAT=2
- trap 1 2 13 15 0
- exit $STAT;;
-
- *) gzip -cdfq "$1" | $comp $OPTIONS - "$2";;
+ *[-.]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
+ )
+ case $gzip_status in
+ *[1-9]*) gzip_status=1;;
+ *) gzip_status=0;;
+ esac
+ else
+ F=`expr "/$2" : '.*/\(.*\)[-.][zZtga]*$'` || F=$prog
+ tmp=
+ trap '
+ test -n "$tmp" && rm -f "$tmp"
+ (exit 2); exit 2
+ ' HUP INT PIPE TERM 0
+ if type mktemp >/dev/null 2>&1; then
+ tmp=`mktemp -t -- "$F.XXXXXX"` || exit 2
+ else
+ set -C
+ tmp=${TMPDIR-/tmp}/$F.$$
+ 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 -cdfq "$2" | $comp $OPTIONS "$1" -;;
- *) $comp $OPTIONS "$1" "$2";;
+ *[-.]gz* | *[-.][zZ] | *.t[ga]z | -)
+ gzip_status=$(
+ exec 4>&1
+ (gzip -cdfq -- "$2" 4>&-; echo $? >&4) 3>&- |
+ eval "$cmp" '"$1"' - >&3
+ );;
+ *) eval "$cmp" '"$1"' '"$2"';;
esac;;
esac
else
- echo "Usage: $prog [${comp}_options] file [file]"
+ echo >&2 "$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
projects / gzip / blobdiff