--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/components/gzip/patches/znew.patch	Thu Oct 24 13:41:59 2013 +0200
@@ -0,0 +1,152 @@
+From b3b5611e046b93fb20aa783d6d11d986f33f91f6 Mon Sep 17 00:00:00 2001
+From: Paul Eggert <eggert <at> cs.ucla.edu>
+Date: Thu, 3 Oct 2013 21:12:09 -0700
+Subject: [PATCH] znew: avoid denial-of-service issue
+
+Reported by Rich Burridge in <http://bugs.gnu.org/15522>.
+* znew.in: Rewrite to avoid the need for a temporary file in /tmp.
+That way, we avoid the need for set -C
+and worrying about denial of service.
+Use touch -r and chmod --reference rather than cpmod.
+Assume cp -p works, as it's now universal.
+Quote 'echo' args better, while we're at it.
+(warn, tmp, cpmod, cpmodarg): Remove.
+(GZIP): Unset, so that we needn't test for gzip extension.
+(ext): Now always '.gz'.
+* znew.1: Document the change of implementation assumptions.
+---
+diff --git a/znew.1 b/znew.1
+index dcdf84f..2a7e5e1 100644
+--- a/znew.1
++++ b/znew.1
+@@ -32,9 +32,16 @@ Keep a .Z file when it is smaller than the .gz file; implies
+ .SH "SEE ALSO"
+ gzip(1), zmore(1), zdiff(1), zgrep(1), zforce(1), gzexe(1), compress(1)
+ .SH BUGS
+-.I Znew
+-does not maintain the time stamp with the -P option if
+-.I cpmod(1)
+-is not available and
+-.I touch(1)
+-does not support the -r option.
++If the
++.B \-P
++option is used,
++.I znew
++does not maintain the time stamp if
++.IR touch (1)
++does not support the
++.B \-r
++option, and does not maintain permissions if
++.IR chmod (1)
++does not support the
++.B \-\-reference
++option.
+diff --git a/znew.in b/znew.in
+index 9bd3ce9..d16311a 100644
+--- a/znew.in
++++ b/znew.in
+@@ -58,33 +58,9 @@ new=0
+ block=1024
+ # block is the disk block size (best guess, need not be exact)
+ 
+-warn="(does not preserve modes and timestamp)"
+-tmp=${TMPDIR-/tmp}/zfoo.$$
+-set -C
+-echo hi > $tmp || exit
+-if test -z "`(${CPMOD-cpmod} $tmp $tmp) 2>&1`"; then
+-  cpmod=${CPMOD-cpmod}
+-  warn=""
+-fi
+-
+-if test -z "$cpmod" && ${TOUCH-touch} -r $tmp $tmp 2>/dev/null; then
+-  cpmod="${TOUCH-touch}"
+-  cpmodarg="-r"
+-  warn="(does not preserve file modes)"
+-fi
+-
+-# check if GZIP env. variable uses -S or --suffix
+-gzip -q $tmp
+-ext=`echo $tmp* | sed "s|$tmp||"`
+-rm -f $tmp*
+-if test -z "$ext"; then
+-  echo znew: error determining gzip extension
+-  exit 1
+-fi
+-if test "$ext" = ".Z"; then
+-  echo znew: cannot use .Z as gzip extension.
+-  exit 1
+-fi
++# Beware -s or --suffix in $GZIP.
++unset GZIP
++ext=.gz
+ 
+ for arg
+ do
+@@ -116,26 +92,27 @@ if test -n "$opt"; then
+ fi
+ 
+ for i do
+-  n=`echo $i | sed 's/.Z$//'`
++  n=`echo "$i" | sed 's/.Z$//'`
+   if test ! -f "$n.Z" ; then
+-    echo $n.Z not found
++    echo "$n.Z not found"
+     res=1; continue
+   fi
+   test $keep -eq 1 && old=`wc -c < "$n.Z"`
+   if test $pipe -eq 1; then
+     if gzip -d < "$n.Z" | gzip $opt > "$n$ext"; then
+       # Copy file attributes from old file to new one, if possible.
+-      test -n "$cpmod" && $cpmod $cpmodarg "$n.Z" "$n$ext" 2> /dev/null
++      touch -r"$n.Z" -- "$n$ext" 2>/dev/null
++      chmod --reference="$n.Z" -- "$n$ext" 2>/dev/null
+     else
+-      echo error while recompressing $n.Z
++      echo "error while recompressing $n.Z"
+       res=1; continue
+     fi
+   else
+     if test $check -eq 1; then
+-      if cp -p "$n.Z" "$n.$$" 2> /dev/null || cp "$n.Z" "$n.$$"; then
++      if cp -p "$n.Z" "$n.$$"; then
+         :
+       else
+-        echo cannot backup "$n.Z"
++        echo "cannot backup $n.Z"
+         res=1; continue
+       fi
+     fi
+@@ -143,7 +120,7 @@ for i do
+       :
+     else
+       test $check -eq 1 && mv "$n.$$" "$n.Z"
+-      echo error while uncompressing $n.Z
++      echo "error while uncompressing $n.Z"
+       res=1; continue
+     fi
+     if gzip $opt "$n"; then
+@@ -151,10 +128,10 @@ for i do
+     else
+       if test $check -eq 1; then
+         mv "$n.$$" "$n.Z" && rm -f "$n"
+-        echo error while recompressing $n
++        echo "error while recompressing $n"
+       else
+         # compress $n  (might be dangerous if disk full)
+-        echo error while recompressing $n, left uncompressed
++        echo "error while recompressing $n, left uncompressed"
+       fi
+       res=1; continue
+     fi
+@@ -175,7 +152,7 @@ for i do
+     else
+       test $pipe -eq 0 && mv "$n.$$" "$n.Z"
+       rm -f "$n$ext"
+-      echo error while testing $n$ext, $n.Z unchanged
++      echo "error while testing $n$ext, $n.Z unchanged"
+       res=1; continue
+     fi
+   elif test $pipe -eq 1; then
+-- 
+1.8.3.1