src/vfs/extfs/helpers/u7z

   1 #! /bin/sh
   2 #
   3 # extfs support for p7zip
   4 # Written by Pavel Roskin <proski@gnu.org>
   5 # Some Bugfixes/workarounds by Sergiy Niskorodov <sgh@mail.zp.ua>
   6 #
   7 # This program is free software: you can redistribute it and/or modify
   8 # it under the terms of the GNU General Public License as published by
   9 # the Free Software Foundation, either version 3 of the License, or
  10 # (at your option) any later version.
  11 #
  12 # This program is distributed in the hope that it will be useful,
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 # GNU General Public License for more details.
  16 #
  17 # You should have received a copy of the GNU General Public License
  18 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19
  20 P7ZIP=`which 7z 2>/dev/null` || P7ZIP=`which 7za 2>/dev/null` || P7ZIP=`which 7zr 2>/dev/null` || P7ZIP=""
  21
  22 mcu7zip_list ()
  23 {
  24         # Symlinks are not shown - no idea how to distinguish them
  25         # Read-only files are not shown as such - it's rarely useful
  26         ugid="`id -nu` `id -ng`"
  27         date_re='^\(....\)-\(..\)-\(..\) \(..:..:..\)'
  28         date_mc='\2-\3-\1 \4'
  29         size_re='............'
  30         # archive entries can have no datetime info, 7z will use archive file datetime
  31         date_archive=`stat -c %y "$1" 2>/dev/null | sed -n "s/${date_re}.*/${date_mc}/p" 2>/dev/null`
  32         [ "${date_archive}"x = x ] && date_archive=`ls -lan "$1" 2>/dev/null | awk '{print $6,"",$7,"",$8}' 2>/dev/null`
  33         [ "${date_archive}"x = x ] && date_archive="01-01-1970 00:00:00"
  34         $P7ZIP l "$1" | sed -n "s/$date_re D.... $size_re $size_re\(.*\)/drwxr-xr-x 1 $ugid 0 $date_mc \5/p;\
  35                                 s/$date_re \..... \($size_re\) $size_re\(.*\)/-rw-r--r-- 1 $ugid \5 $date_mc \6/p;\
  36                                 s/^\s*D.... $size_re $size_re\(.*\)/drwxr-xr-x 1 $ugid 0 $date_archive \1/p;\
  37                                 s/^\s*\..... \($size_re\) $size_re\(.*\)/-rw-r--r-- 1 $ugid \1 $date_archive \2/p"
  38 }
  39
  40 mcu7zip_copyout ()
  41 {
  42         #first we check if we have old p7zip archive with prefix ./ in filename
  43         $P7ZIP l "$1" "$2" | grep -q "0 files, 0 folders" && \
  44         EXFNAME='*./'"$2" || EXFNAME="$2"
  45         $P7ZIP e -so "$1" "$EXFNAME" > "$3" 2>/dev/null
  46 }
  47
  48 mcu7zip_copyin ()
  49 {
  50         $P7ZIP a -si"$2" "$1" <"$3" >/dev/null 2>&1
  51 }
  52
  53 mcu7zip_mkdir ()
  54 {
  55         dir=`mktemp -d "${MC_TMPDIR:-/tmp}/mctmpdir-u7z.XXXXXX"` || exit 1
  56         mkdir -p "$dir"/"$2"
  57         $P7ZIP a -w"$dir" "$1" "$dir"/"$2" >/dev/null 2>&1
  58         rm -rf "$dir"
  59 }
  60
  61 mcu7zip_rm ()
  62 {
  63         # NOTE: Version 4.20 fails to delete files in subdirectories
  64         #first we check if we have old p7zip archive with prefix ./ in filename
  65         $P7ZIP l "$1" "$2" | grep -q "0 files, 0 folders" && \
  66         EXFNAME='*./'"$2" || EXFNAME="$2"
  67         $P7ZIP d "$1" "$EXFNAME" 2>&1 | grep -q E_NOTIMPL > /dev/null 2>&1 && \
  68         { printf "Function not implemented...\n7z cannot delete from solid archive." >&2 ; exit 1 ; }
  69 }
  70
  71 mcu7zip_rmdir ()
  72 {
  73         #first we check if we have old p7zip archive with prefix ./ in filename
  74         $P7ZIP l "$1" "$2" | grep -q "0 files, 0 folders" && \
  75         EXFNAME='*./'"$2" || EXFNAME="$2"
  76         $P7ZIP d "$1" "$EXFNAME"/ 2>&1 | grep -q E_NOTIMPL > /dev/null 2>&1 && \
  77         { printf "Function not implemented...\n7z cannot delete from solid archive." >&2 ; exit 1 ; }
  78 }
  79
  80 # override any locale for dates
  81 LC_DATE=C
  82 export LC_DATE
  83
  84 umask 077
  85
  86 if [ -z "$P7ZIP" ]; then
  87     echo "Error: could not find p7zip (looked for 7z, 7za and 7zr)" >&2
  88     exit 1
  89 fi
  90
  91 cmd="$1"
  92 shift
  93
  94 case "$cmd" in
  95   list)    mcu7zip_list    "$@" | sort -k 8 ;;
  96   copyout) mcu7zip_copyout "$@" ;;
  97   copyin)  mcu7zip_copyin  "$@" ;;
  98   mkdir)   mcu7zip_mkdir   "$@" ;;
  99   rm)      mcu7zip_rm      "$@" ;;
 100   rmdir)   mcu7zip_rmdir   "$@" ;;
 101   *) exit 1 ;;
 102 esac
 103 exit 0