Re: [BackupPC-users] Simple Bash shell function for locating and reading pool files

I corrected a small error in the script and allowed for setting TopDir
with an optional second argument

------------------------------------

function BackupPC_zcatPool ()
{
    local BACKUPPC_ZCAT=$(which BackupPC_zcat)
    local TOPDIR=/var/lib/backuppc
    [ -n "$2"  -a -d "$2" ] && TOPDIR=$2
    local CPOOL="$TOPDIR/cpool"
    local POOL="$TOPDIR/pool"
    [ -n "$BACKUPPC_ZCAT" ] || 
BACKUPPC_ZCAT=/usr/share/backuppc/bin/BackupPC_zcat

    local file=${1##*/} #Strip the path prefix
    #If attrib file...
    file=${file/attrib[0-9a-f][0-9a-f]_/attrib_} #Convert inode format attrib 
to normal attrib
    file=${file##attrib_} #Extract the md5sum from the attrib file name

    local ABCD=$(printf '%04x' "$(( 0x${file:0:4} & 0xfefe ))")
    local prefix="${ABCD:0:2}/${ABCD:2:2}"
#   echo $prefix

    if [ -e "$CPOOL/$prefix/$file" ]; then #V4 - cpool
        $BACKUPPC_ZCAT $CPOOL/$prefix/$file
    elif [ -e "$POOL/$prefix/$file" ]; then #V4 - pool
        cat $CPOOL/$prefix/$file
    elif [ -e "$CPOOL/${file:0:1}/${file:1:1}/${file:2:1}/$file" ]; then #V3 - 
cpool
        $BACKUPPC_ZCAT "$CPOOL/${file:0:1}/${file:1:1}/${file:2:1}/$file"
    elif [ -e "$POOL/${file:0:1}/${file:1:1}/${file:2:1}/$file" ]; then #V3 - 
pool
        cat "$POOL/${file:0:1}/${file:1:1}/${file:2:1}/$file"
    else
        echo "Can't find pool file: $file" >/dev/stderr
    fi
}

backu...@kosowsky.org wrote at about 11:16:53 -0400 on Thursday, June 11, 2020:
 > 
 > I frequently use the following Bash shell function to allow me to locate and
 > read pool/cpool files as I got tired of manually converting to the
 > pool heirarchy decoding. It's not very complicated, but helpful
 > 
 > 1. You can enter either:
 >    - 32 hex character digest (lower case): <32hex>
 >    - attrib file name with/without preceding path and either in the
 >      "normal" or inode form. i.e..
 >         [<path>/]attrib_<32hex>
 >         [<path>/]attrib<2hex>_<32hex>
 > 
 > 2. It works with pool or cpool
 > 3. It works with v3/v4
 > 
 > #####################################################################################
 > function BackupPC_zcatPool ()
 > {
 >     local BACKUPPC_ZCAT=$(which BackupPC_zcat)
 >     [ -n "$BACKUPPC_ZCAT" ] || 
 > BACKUPPC_ZCAT=/usr/share/backuppc/bin/BackupPC_zcat
 >     [ -n "$CPOOL" ] || local CPOOL=/var/lib/backuppc/cpool
 >     [ -n "$POOL" ] || local POOL=/var/lib/backuppc/pool
 > 
 >     local file=${1##*/} #Strip the path prefix
 >     #If attrib file...
 >     file=${file/attrib[0-9a-f][0-9a-f]_/attrib_} #Convert inode format 
 > attrib to normal attrib
 >     file=${file##attrib_} #Extract the md5sum from the attrib file name
 > 
 >     local ABCD=$(printf '%x' "$(( 0x${file:0:4} & 0xfefe ))")
 >     local prefix="${ABCD:0:2}/${ABCD:2:2}"
 > #   echo $prefix
 > 
 >     if [ -e "$CPOOL/$prefix/$file" ]; then #V4 - cpool
 >      $BACKUPPC_ZCAT $CPOOL/$prefix/$file
 >     elif [ -e "$POOL/$prefix/$file" ]; then #V4 - pool
 >      cat $CPOOL/$prefix/$file
 >     elif [ -e "$CPOOL/${file:0:1}/${file:1:1}/${file:2:1}/$file" ]; then #V3 
 > - cpool
 >      $BACKUPPC_ZCAT "$CPOOL/${file:0:1}/${file:1:1}/${file:2:1}/$file"
 >     elif [ -e "$POOL/${file:0:1}/${file:1:1}/${file:2:1}/$file" ]; then #V3 
 > - pool
 >      cat "$POOL/${file:0:1}/${file:1:1}/${file:2:1}/$file"
 >     else
 >      echo "Can't find pool file: $file" >/dev/stderr
 >     fi
 > }
 > 
 > 
 > _______________________________________________
 > BackupPC-users mailing list
 > BackupPC-users@lists.sourceforge.net
 > List:    https://lists.sourceforge.net/lists/listinfo/backuppc-users
 > Wiki:    http://backuppc.wiki.sourceforge.net
 > Project: http://backuppc.sourceforge.net/


_______________________________________________
BackupPC-users mailing list
BackupPC-users@lists.sourceforge.net
List:    https://lists.sourceforge.net/lists/listinfo/backuppc-users
Wiki:    http://backuppc.wiki.sourceforge.net
Project: http://backuppc.sourceforge.net/