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| Current File : //bin/preunzip |
#!/bin/sh
# Copyright (c) 2004
# Kevin Atkinson
#
# Permission to use, copy, modify, distribute and sell this software
# and its documentation for any purpose is hereby granted without
# fee, provided that the above copyright notice appear in all copies
# and that both that copyright notice and this permission notice
# appear in supporting documentation. Kevin Atkinson makes no
# representations about the suitability of this software for any
# purpose. It is provided "as is" without express or implied
# warranty.
cmd=`basename "$0"`
warn ()
{
if test -z "$quiet"; then echo "$cmd: $1" >&2 ; fi
}
error ()
{
echo "$cmd: $1" >&2
errors=t
}
zip2 ()
{
case $1 in
d)
prezip-bin -d "$cmd: $2"
;;
z)
if test "$sort"
then
LC_COLLATE=C sort -u | prezip-bin -z "$cmd: $2"
else
prezip-bin -z "$cmd: $2"
fi
;;
esac
if test $? -eq 0
then
return 0
else
errors=t
return 1
fi
}
zip ()
{
if test -e "$3" -a ! "$force"
then
error "Output file $3 already exists."
return 1
fi
zip2 $1 "$2: " < "$2" > "$3"
if test $? -eq 0
then
if test -z "$keep"; then rm "$2"; fi
return 0
else
rm "$3"
return 1
fi
}
case $cmd in
prezip) mode=z ;;
preunzip) mode=d ;;
precat) mode=d; stdout=t ;;
*) mode=h ;;
esac
num=0
for p
do
case $p in
--*)
parm=`expr "x$p" : '...\(.*\)'`
case $parm in
decompress ) mode=d ;;
compress ) mode=z ;;
keep ) keep=t ;;
force ) force=t ;;
stdout ) stdout=t ;;
sort ) sort=t ;;
nocwl ) nocwl=t ;;
license ) mode=L ;;
version ) mode=V ;;
help ) mode=h ;;
quiet ) quiet=t ;;
* ) error "invalid option -- $parm";;
esac
;;
-* )
p=`expr "x$p" : '..\(.*\)'`
while test "$p"
do
parm=`expr "$p" : '\(.\)'`
p=`expr "$p" : '.\(.*\)'`
case $parm in
d ) mode=d ;;
z ) mode=z ;;
k ) keep=t ;;
f ) force=t ;;
c ) stdout=t ;;
s ) sort=t ;;
S ) nocwl=t ;;
L ) mode=L ;;
V ) mode=V ;;
h ) mode=h ;;
q ) quiet=t ;;
* ) error "invalid option -- $parm";;
esac
done
;;
* )
num=`expr $num + 1`
;;
esac
done
if test "$errors"
then
mode=h
fi
case $mode in
h )
prezip-bin -V
cat <<EOF
usage $0 [-dzhLV] [-cfksSq] [file ...]
-h --help display help
-d --decompress force decompression
-z --compress dorce compression
-L --license display software license
-V --version display version
-c --stdout decompress to standard output
-f --force force
-k --keep keep input files
-s --sort sort and remove duplicates before compressing
-S --nocwl do not rename .wl suffix to .cwl (use .wl.pz instead)
-q --quiet suppress all warnings
If invoked as "prezip" the default action is to compress.
as "preunzip" the default action is to decompress.
as "precat" the default action is to decompress to stdout.
If no file names are given then prezip will compress or decompress
from the standard input to the standard output. Short flags can be
combined so that "-c -s" is the same as "-cs".
Prezip is _not_ a general purpose compressor. It should only be
used on sorted word lists or other similar text files. It will
likely _increase_ the size of binary data.
EOF
;;
L )
prezip-bin -V
cat <<EOF
Copyright (c) 2004
Kevin Atkinson
Permission to use, copy, modify, distribute and sell this software
and its documentation for any purpose is hereby granted without
fee, provided that the above copyright notice appear in all copies
and that both that copyright notice and this permission notice
appear in supporting documentation. Kevin Atkinson makes no
representations about the suitability of this software for any
purpose. It is provided "as is" without express or implied
warranty.
EOF
;;
V )
prezip-bin -V
;;
d | z )
if test $num -gt 0
then
for f
do
case $f in
-* ) ;;
* )
if test \( -f "$f" -a ! -L "$f" \) \
-o \( \( "$stdout" -o "$force" \) -a -L "$f" \)
then
if test "$stdout"
then
zip2 $mode "$f: " < "$f"
else
case $mode in
d )
dir=`dirname "$f"`
file=`basename "$f"`
base=`basename "$f" .pz`
base2=`basename "$f" .cwl`
if test "$file" != "$base"
then
out="$dir/$base"
zip d "$f" "$out"
elif test "$file" != "$base2"
then
out="$dir/$base2.wl"
zip d "$f" "$out"
elif test "$force"
then
out="$f.out"
warn "can't guess original name - using \"$out\""
zip d "$f" "$out"
else
warn "$f does not end in .pz or .cwl - ignored"
fi
;;
z )
dir=`dirname "$f"`
file=`basename "$f"`
base=`basename "$f" .wl`
if test "$nocwl" -o "$file" = "$base"
then
zip z "$f" "$f.pz"
else
zip z "$f" "$dir/$base.cwl"
fi
;;
esac
fi
elif test -e "$f"
then
warn "$f is not a regular file - ignored"
else
error "$f: No such file"
fi
;;
esac
done
else
case $mode in
d ) zip2 d ;;
z ) zip2 z ;;
esac
fi
;;
esac
if test "$errors"
then
exit 1
else
exit 0
fi