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|
#!/bin/sh
# Copyright © 2005-2007 Roger Leigh <rleigh@codelibre.net>
#
# schroot is free software: you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# schroot is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see
# <http://www.gnu.org/licenses/>.
#
#####################################################################
set -e
. "$SETUP_DATA_DIR/common-data"
. "$SETUP_DATA_DIR/common-functions"
. "$SETUP_DATA_DIR/common-config"
if [ "$VERBOSE" = "verbose" ]; then
CP_VERBOSE="--verbose"
fi
# Copy a file if the source and destination differ
# $1: source file
# $2: destination file
copy_file()
{
if [ -e "$1" ]; then
COPY="true"
if [ -e "$2" ]; then
# Device and inode
da=$(/usr/bin/stat --format="%d %i" "$1")
# This one can fail since it might not exist yet
db=$(/usr/bin/stat --format="%d %i" "$2" 2>/dev/null || :)
if [ "$da" = "$db" ]; then
COPY="false"
elif [ -L "$2" ]; then
# Copy if destination is a symlink
:
elif [ -f "$1" ] && [ -f "$2" ]; then
# Content
ca=$(/usr/bin/md5sum "$1" | sed -e 's/\(^[0-9a-f][0-9a-f]*\).*$/\1/')
cb=$(/usr/bin/md5sum "$2" 2>/dev/null || :)
cb=$(echo "$cb" | sed -e 's/\(^[0-9a-f][0-9a-f]*\).*$/\1/')
# Copy only if file contents differ
if [ "$ca" = "$cb" ]; then
COPY="false"
fi
fi
fi
# Copy only if files are different
if [ "$COPY" = "true" ]; then
mkdir -p $(dirname $2)
if [ -f "$1" ]; then
cp --remove-destination --preserve=all $CP_VERBOSE "$1" "$2"
else
# Copy non-regular file directly
cp --remove-destination -a $CP_VERBOSE "$1" "$2"
fi
fi
else
fatal "Not copying nonexistent file: $1"
fi
}
# Resolve a relative path inside the chroot to its absolute path on the host
# $1: base path of the chroot
# $2: relative path to resolve
resolve_path()
{
base_path="$(realpath "$1")"
relative_destination="${2#/}"
absolute_destination="$base_path"
while [ -n "$relative_destination" ]; do
first_component="${relative_destination%%/*}"
relative_destination="${relative_destination#$first_component}"
relative_destination="${relative_destination#/}"
# If the first component is a link
if link="$(readlink "$absolute_destination/$first_component")"; then
# If the first component is a relative link
if [ "${link#/}" = "$link" ]; then
relative_destination="$link/$relative_destination"
else
absolute_destination="$base_path"
relative_destination="${link#/}/$relative_destination"
fi
else
absolute_destination="$(realpath "$absolute_destination/$first_component")"
# If the absolute destination gets out of the chroot
if [ "${absolute_destination#$base_path}" = "$absolute_destination" ]; then
absolute_destination="$base_path"
fi
fi
done
echo "$absolute_destination"
}
if [ $STAGE = "setup-start" ] || [ $STAGE = "setup-recover" ]; then
if [ -n "$SETUP_COPYFILES" ]; then
if [ -f "$SETUP_COPYFILES" ]; then
while read src dst; do
: ${dst:=$src}
if echo "$src" | grep -Eq '^(#|$)' ; then
continue
fi
if echo "$src" | grep -q '^/' &&
echo "$dst" | grep -q '^/'; then
copy_file "$src" "$(resolve_path "${CHROOT_PATH}" "$dst")"
else
warn "Not copying file with relative path: $src -> $dst"
fi
done < "$SETUP_COPYFILES"
else
fatal "copyfiles file '$SETUP_COPYFILES' does not exist"
fi
fi
fi
|
