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#! /bin/sh
#
# extfs support for p7zip
# Written by Pavel Roskin <proski@gnu.org>
# Some Bugfixes/workarounds by Sergiy Niskorodov <sgh@mail.zp.ua>
#
# This program 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.
#
# This program 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/>.
P7ZIP=`which 7z 2>/dev/null` || P7ZIP=`which 7za 2>/dev/null` || P7ZIP=`which 7zr 2>/dev/null` || P7ZIP=""
# Let the test framework hook in:
P7ZIP=${MC_TEST_EXTFS_LIST_CMD:-$P7ZIP}
STAT=${MC_TEST_EXTFS_U7Z_STAT:-stat}
mcu7zip_list ()
{
# Symlinks are not shown - no idea how to distinguish them
# Read-only files are not shown as such - it's rarely useful
ugid="`id -nu` `id -ng`"
date_re='^\(....\)-\(..\)-\(..\) \(..:..:..\)' # 19 chars.
date_mc='\2-\3-\1 \4'
empty_date_re='^ \{19\}'
size_re='............' # 12 chars.
empty_size_re=' \{12\}'
zero_size=' 0'
# archive entries can have no datetime info, 7z will use archive file datetime
date_archive=`$STAT -c %y "$1" 2>/dev/null | sed -n "s/${date_re}.*/${date_mc}/p" 2>/dev/null`
[ "${date_archive}"x = x ] && date_archive=`ls -lan "$1" 2>/dev/null | awk '{print $6, $7, $8}' 2>/dev/null`
[ "${date_archive}"x = x ] && date_archive="01-01-1970 00:00:00"
$P7ZIP l "$1" | sed -n "
# If the uncompressed size is missing, we copy the compressed size onto it.
#
# But first, if the compressed size is missing too, set it to zero:
s/^\(.\{19\} [D.]....\) $empty_size_re $empty_size_re/\1 $zero_size $zero_size/
# Next, do the copy:
s/^\(.\{19\} [D.]....\) $empty_size_re \($size_re\)/\1 \2 \2/
#
# (We use '.\{19\}' as the date may be missing. It may give false positives
# but we don't mind: the printing commands that follow use strict patterns.).
# Handle directories.
s/$date_re D.... $size_re $size_re\(.*\)/drwxr-xr-x 1 $ugid 0 $date_mc \5/p
s/$empty_date_re D.... $size_re $size_re\(.*\)/drwxr-xr-x 1 $ugid 0 $date_archive \1/p
# Handle normal files.
s/$date_re \..... \($size_re\) $size_re\(.*\)/-rw-r--r-- 1 $ugid \5 $date_mc \6/p
s/$empty_date_re \..... \($size_re\) $size_re\(.*\)/-rw-r--r-- 1 $ugid \1 $date_archive \2/p
"
}
mcu7zip_copyout ()
{
#first we check if we have old p7zip archive with prefix ./ in filename
$P7ZIP l "$1" "$2" | grep -q "0 files, 0 folders" && \
EXFNAME='*./'"$2" || EXFNAME="$2"
$P7ZIP e -so "$1" "$EXFNAME" > "$3" 2>/dev/null
}
mcu7zip_copyin ()
{
$P7ZIP a -si"$2" "$1" <"$3" >/dev/null 2>&1
}
mcu7zip_mkdir ()
{
dir=`mktemp -d "${MC_TMPDIR:-/tmp}/mctmpdir-u7z.XXXXXX"` || exit 1
mkdir -p "$dir"/"$2"
$P7ZIP a -w"$dir" "$1" "$dir"/"$2" >/dev/null 2>&1
rm -rf "$dir"
}
mcu7zip_rm ()
{
# NOTE: Version 4.20 fails to delete files in subdirectories
#first we check if we have old p7zip archive with prefix ./ in filename
$P7ZIP l "$1" "$2" | grep -q "0 files, 0 folders" && \
EXFNAME='*./'"$2" || EXFNAME="$2"
$P7ZIP d "$1" "$EXFNAME" 2>&1 | grep -q E_NOTIMPL > /dev/null 2>&1 && \
{ printf "Function not implemented...\n7z cannot delete from solid archive." >&2 ; exit 1 ; }
}
mcu7zip_rmdir ()
{
#first we check if we have old p7zip archive with prefix ./ in filename
$P7ZIP l "$1" "$2" | grep -q "0 files, 0 folders" && \
EXFNAME='*./'"$2" || EXFNAME="$2"
$P7ZIP d "$1" "$EXFNAME"/ 2>&1 | grep -q E_NOTIMPL > /dev/null 2>&1 && \
{ printf "Function not implemented...\n7z cannot delete from solid archive." >&2 ; exit 1 ; }
}
# override any locale for dates
LC_DATE=C
export LC_DATE
umask 077
if [ -z "$P7ZIP" ]; then
echo "Error: could not find p7zip (looked for 7z, 7za and 7zr)" >&2
exit 1
fi
cmd="$1"
shift
case "$cmd" in
list) mcu7zip_list "$@" | sort -k 8 ;;
copyout) mcu7zip_copyout "$@" ;;
copyin) mcu7zip_copyin "$@" ;;
mkdir) mcu7zip_mkdir "$@" ;;
rm) mcu7zip_rm "$@" ;;
rmdir) mcu7zip_rmdir "$@" ;;
*) exit 1 ;;
esac
exit 0
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