home *** CD-ROM | disk | FTP | other *** search
- #!/bin/sh
-
- PATH="/usr/bin:$PATH"; export PATH
- check=0
- pipe=0
- opt=
- files=
- keep=0
- res=0
- old=0
- new=0
- block=1024
- # block is the disk block size (best guess, need not be exact)
-
- warn="(does not preserve modes and timestamp)"
- tmp=`mktemp -d ${TMPDIR-/tmp}/zfoo.XXXXXX` || {
- echo 'cannot create temporary directory' >&2
- exit 1
- }
- trap "rm -rf $tmp/" 0 1 2 3 6 13 15
- set -C
- echo hi > $tmp/1
- echo hi > $tmp/2
- if test -z "`(${CPMOD-cpmod} $tmp/1 $tmp/2) 2>&1`"; then
- cpmod=${CPMOD-cpmod}
- warn=""
- fi
-
- if test -z "$cpmod" && ${TOUCH-touch} -r $tmp/1 $tmp/2 2>/dev/null; then
- cpmod="${TOUCH-touch}"
- cpmodarg="-r"
- warn="(does not preserve file modes)"
- fi
-
- # check about bzip extension
- bzip2 $tmp/1 &> /dev/null
- ext=`echo $tmp/1* | sed "s|$tmp/1||"`
- rm -rf $tmp/
- trap - 0 1 2 3 6 13 15
- if test -z "$ext"; then
- echo bznew: error determining bzip2 extension
- exit 1
- fi
- if test "$ext" = ".gz"; then
- echo bznew: cannot use .gz as bzip extension.
- exit 1
- fi
-
- for arg
- do
- case "$arg" in
- -*) opt="$opt $arg"; shift;;
- *) break;;
- esac
- done
-
- if test $# -eq 0; then
- echo "recompress .gz files into $ext (bzip) files"
- echo usage: `echo $0 | sed 's,^.*/,,'` "[-tv9KP]" file.gz...
- echo " -t tests the new files before deleting originals"
- echo " -v be verbose"
- echo " -9 use the slowest compression method (optimal compression)"
- echo " -K keep a .gz file when it is smaller than the $ext file"
- echo " -P use pipes for the conversion $warn"
- exit 1
- fi
-
- opt=`echo "$opt" | sed -e 's/ //g' -e 's/-//g'`
- case "$opt" in
- *t*) check=1; opt=`echo "$opt" | sed 's/t//g'`
- esac
- case "$opt" in
- *K*) keep=1; opt=`echo "$opt" | sed 's/K//g'`
- esac
- case "$opt" in
- *P*) pipe=1; opt=`echo "$opt" | sed 's/P//g'`
- esac
- if test -n "$opt"; then
- opt="-$opt"
- fi
-
- for i do
- n=`echo $i | sed 's/.gz$//'`
- if test ! -f "$n.gz" ; then
- echo $n.gz not found
- res=1; continue
- fi
- test $keep -eq 1 && old=`wc -c < "$n.gz"`
- if test $pipe -eq 1; then
- if gzip -d < "$n.gz" | bzip2 $opt > "$n$ext"; then
- # Copy file attributes from old file to new one, if possible.
- test -n "$cpmod" && $cpmod $cpmodarg "$n.gz" "$n$ext" 2> /dev/null
- else
- echo error while recompressing $n.gz
- res=1; continue
- fi
- else
- if test $check -eq 1; then
- if cp -p "$n.gz" "$n.$$" 2> /dev/null || cp "$n.gz" "$n.$$"; then
- :
- else
- echo cannot backup "$n.gz"
- res=1; continue
- fi
- fi
- if gzip -d "$n.gz"; then
- :
- else
- test $check -eq 1 && mv "$n.$$" "$n.gz"
- echo error while uncompressing $n.gz
- res=1; continue
- fi
- if bzip2 $opt "$n"; then
- :
- else
- if test $check -eq 1; then
- mv "$n.$$" "$n.gz" && rm -f "$n"
- echo error while recompressing $n
- else
- # gzip $n (might be dangerous if disk full)
- echo error while recompressing $n, left uncompressed
- fi
- res=1; continue
- fi
- fi
- test $keep -eq 1 && new=`wc -c < "$n$ext"`
- if test $keep -eq 1 && test `expr \( $old + $block - 1 \) / $block` -lt \
- `expr \( $new + $block - 1 \) / $block`; then
- if test $pipe -eq 1; then
- rm -f "$n$ext"
- elif test $check -eq 1; then
- mv "$n.$$" "$n.gz" && rm -f "$n$ext"
- else
- bzip2 -d "$n$ext" && gzip "$n" && rm -f "$n$ext"
- fi
- echo "$n.gz smaller than $n$ext -- unchanged"
-
- elif test $check -eq 1; then
- if bzip2 -t "$n$ext" ; then
- rm -f "$n.$$" "$n.gz"
- else
- test $pipe -eq 0 && mv "$n.$$" "$n.gz"
- rm -f "$n$ext"
- echo error while testing $n$ext, $n.gz unchanged
- res=1; continue
- fi
- elif test $pipe -eq 1; then
- rm -f "$n.gz"
- fi
- done
- exit $res
-