--- gzexe.in.orig	2004-06-23 19:17:49.978676668 -0400
+++ gzexe.in	2004-06-23 19:22:38.651945744 -0400
@@ -42,8 +42,10 @@
   exit 1
 fi
 
+set -C
 tmp=gz$$
 trap "rm -f $tmp; exit 1" 1 2 3 5 10 13 15
+: > $tmp || exit 1
 
 decomp=0
 res=0
@@ -53,8 +55,8 @@
   shift
 fi
 
-echo hi > zfoo1$$
-echo hi > zfoo2$$
+echo hi > zfoo1$$ || exit 1
+echo hi > zfoo2$$ || exit 1
 if test -z "`(${CPMOD-cpmod} zfoo1$$ zfoo2$$) 2>&1`"; then
   cpmod=${CPMOD-cpmod}
 fi
@@ -110,26 +112,28 @@
       writable=0
       chmod u+w $tmp 2>/dev/null
     fi
+    : >| $tmp	# truncate the file, ignoring set -C
   fi
   if test $decomp -eq 0; then
-    sed 1q $0 > $tmp
+    sed 1q $0 >> $tmp
     sed "s|^if tail|if $tail|" >> $tmp <<'EOF'
-skip=22
+skip=23
 set -C
 umask=`umask`
 umask 77
-if tail +$skip "$0" | /bin/gzip -cd > /tmp/gztmp$$; then
+tmpfile=`tempfile -p gztmp -d /tmp` || exit 1
+if tail +$skip "$0" | /bin/gzip -cd >> $tmpfile; then
   umask $umask
-  /bin/chmod 700 /tmp/gztmp$$
+  /bin/chmod 700 $tmpfile
   prog="`echo $0 | /bin/sed 's|^.*/||'`"
-  if /bin/ln /tmp/gztmp$$ "/tmp/$prog" 2>/dev/null; then
-    trap '/bin/rm -f /tmp/gztmp$$ "/tmp/$prog"; exit $res' 0
-    (/bin/sleep 5; /bin/rm -f /tmp/gztmp$$ "/tmp/$prog") 2>/dev/null &
+  if /bin/ln $tmpfile "/tmp/$prog" 2>/dev/null; then
+    trap '/bin/rm -f $tmpfile "/tmp/$prog"; exit $res' 0
+    (/bin/sleep 5; /bin/rm -f $tmpfile "/tmp/$prog") 2>/dev/null &
     /tmp/"$prog" ${1+"$@"}; res=$?
   else
-    trap '/bin/rm -f /tmp/gztmp$$; exit $res' 0
-    (/bin/sleep 5; /bin/rm -f /tmp/gztmp$$) 2>/dev/null &
-    /tmp/gztmp$$ ${1+"$@"}; res=$?
+    trap '/bin/rm -f $tmpfile; exit $res' 0
+    (/bin/sleep 5; /bin/rm -f $tmpfile) 2>/dev/null &
+    $tmpfile ${1+"$@"}; res=$?
   fi
 else
   echo Cannot decompress $0; exit 1
@@ -144,11 +148,11 @@
 
   else
     # decompression
-    skip=22
+    skip=23
     if sed -e 1d -e 2q "$i" | grep "^skip=[0-9][0-9]*$" >/dev/null; then
       eval `sed -e 1d -e 2q "$i"`
     fi
-    if tail +$skip "$i" | gzip -cd > $tmp; then
+    if $tail +$skip "$i" | gzip -cd >> $tmp; then
       :
     else
       echo ${x}: $i probably not in gzexe format, file unchanged.