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#!/bin/bash
# flxfix - 2003/01/31 - Willy Tarreau <willy@ant-computing.com>
# Generates a shell script from a difference between two trees so that the last
# one becomes as close to the first one as possible.
# usage:
# flx check <reference> <tobefixed> | flxfix [ -R ] > fix.sh
# Use -R to swap the two trees
# usage : fixperms $perm $uid $gid $date $name
function fixperms {
echo touch -t \"`date -d "Jan 1 00:00:$4 UTC 1970" +"%Y%m%d%H%M.%S" `\" $5
echo chown $2:$3 $5
echo chmod $1 $5
}
mustswap=0
if [ "x$1" = "x-R" ]; then
mustswap=1
fi
while read chg type perm uid gid size sign date name link rest; do
if [ $mustswap = 1 ]; then
chg=`echo $chg | tr '<>+\-' '><\-+'`
fi
if [ "x$rest" != "x" -o "x$type" != "xl" -a "x$link" != "x" ]; then
echo "# Ignoring too long line : $REPLY"
continue
elif [ "x$name" = "x" -o "x$type" = "xl" -a "x$link" = "x" ]; then
echo "# Ignoring too short line : $REPLY"
continue
fi
if [ x$chg = x+ ]; then
# new entry which wasn't in <reference>, should be removed
if [ x$type = xd ]; then
# theorically, we should use rm -rf to suppress all children
echo rmdir $name
else
echo rm -f $name
fi
elif [ x$chg = x- ]; then
# missing entry, sometimes we can rebuild them
if [ x$type = xl ]; then
# we'll rebuild a symbolic link
echo ln -s $link $name
echo chown -h $uid:$gid $name
elif [ x$type = xd ]; then
# we'll rebuild a directory
echo mkdir -p $name
fixperms $perm $uid $gid $date $name
elif [ x$type = x- ]; then
if [ x$size = x0 ]; then
# we can also rebuild files, only if they are empty
fixperms $perm $uid $gid $date $name
else
echo "echo \"Cannot create missing file $name ($size bytes).\""
fi
elif [ x$type = xc -o x$type = xb -o x$type = xf ]; then
# we'll rebuild nodes
echo mknod $name ${type/f/p} ${size/,/ }
fixperms $perm $uid $gid $date $name
else
echo "echo \"Cannot fix $name, unsupported file type : $type\""
fi
elif [ x$chg = x\< ]; then
# entry has changed
if [ x$type = xl ]; then
# we'll destroy and rebuild a symbolic link
echo rm -f $name
echo ln -s $link $name
echo chown -h $uid:$gid $name
elif [ x$type = xc -o x$type = xb -o x$type = xf ]; then
# we'll destroy and rebuild nodes
echo rm -f $name
echo mknod $name ${type/f/p} ${size/,/ }
fixperms $perm $uid $gid $date $name
else
# in other cases, we only try to fix perms
fixperms $perm $uid $gid $date $name
fi
fi
done
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