diff options
Diffstat (limited to 'Build/source/utils/gzip/znew.in')
-rw-r--r-- | Build/source/utils/gzip/znew.in | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/Build/source/utils/gzip/znew.in b/Build/source/utils/gzip/znew.in new file mode 100644 index 00000000000..5b61471e030 --- /dev/null +++ b/Build/source/utils/gzip/znew.in @@ -0,0 +1,146 @@ +: +#!/bin/sh + +PATH="BINDIR:$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=/tmp/zfoo.$$ +echo hi > $tmp.1 +echo hi > $tmp.2 +if test -z "`(${CPMOD-cpmod} $tmp.1 $tmp.2) 2>&1`"; then + cpmod=${CPMOD-cpmod} + warn="" +fi + +if test -z "$cpmod" && ${TOUCH-touch} -r $tmp.1 $tmp.2 2>/dev/null; then + cpmod="${TOUCH-touch}" + cpmodarg="-r" + warn="(does not preserve file modes)" +fi + +# check if GZIP env. variable uses -S or --suffix +gzip -q $tmp.1 +ext=`echo $tmp.1* | sed "s|$tmp.1||"` +rm -f $tmp.[12]* +if test -z "$ext"; then + echo znew: error determining gzip extension + exit 1 +fi +if test "$ext" = ".Z"; then + echo znew: cannot use .Z as gzip extension. + exit 1 +fi + +for arg +do + case "$arg" in + -*) opt="$opt $arg"; shift;; + *) break;; + esac +done + +if test $# -eq 0; then + echo "recompress .Z files into $ext (gzip) files" + echo usage: `echo $0 | sed 's,^.*/,,'` "[-tv9KP]" file.Z... + echo " -t tests the new files before deleting originals" + echo " -v be verbose" + echo " -9 use the slowest compression method (optimal compression)" + echo " -K keep a .Z file when it is smaller than the $ext file" + echo " -P use pipes for the conversion $warn" + exit 1 +fi + +opt=`echo "$opt" | sed -e 's/ //g' -e 's/-//g'` +case "$opt" in + *t*) check=1; opt=`echo "$opt" | sed 's/t//g'` +esac +case "$opt" in + *K*) keep=1; opt=`echo "$opt" | sed 's/K//g'` +esac +case "$opt" in + *P*) pipe=1; opt=`echo "$opt" | sed 's/P//g'` +esac +if test -n "$opt"; then + opt="-$opt" +fi + +for i do + n=`echo $i | sed 's/.Z$//'` + if test ! -f "$n.Z" ; then + echo $n.Z not found + res=1; continue + fi + test $keep -eq 1 && old=`wc -c < "$n.Z"` + if test $pipe -eq 1; then + if gzip -d < "$n.Z" | gzip $opt > "$n$ext"; then + # Copy file attributes from old file to new one, if possible. + test -n "$cpmod" && $cpmod $cpmodarg "$n.Z" "$n$ext" 2> /dev/null + else + echo error while recompressing $n.Z + res=1; continue + fi + else + if test $check -eq 1; then + if cp -p "$n.Z" "$n.$$" 2> /dev/null || cp "$n.Z" "$n.$$"; then + : + else + echo cannot backup "$n.Z" + res=1; continue + fi + fi + if gzip -d "$n.Z"; then + : + else + test $check -eq 1 && mv "$n.$$" "$n.Z" + echo error while uncompressing $n.Z + res=1; continue + fi + if gzip $opt "$n"; then + : + else + if test $check -eq 1; then + mv "$n.$$" "$n.Z" && rm -f "$n" + echo error while recompressing $n + else + # compress $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 -a `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.$$" "$n.Z" && rm -f "$n$ext" + else + gzip -d "$n$ext" && compress "$n" && rm -f "$n$ext" + fi + echo "$n.Z smaller than $n$ext -- unchanged" + + elif test $check -eq 1; then + if gzip -t "$n$ext" ; then + rm -f "$n.$$" "$n.Z" + else + test $pipe -eq 0 && mv "$n.$$" "$n.Z" + rm -f "$n$ext" + echo error while testing $n$ext, $n.Z unchanged + res=1; continue + fi + elif test $pipe -eq 1; then + rm -f "$n.Z" + fi +done +exit $res |