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Editing: tarcat
#! /bin/sh # Usage: tarcat volume1 volume2 ... # concatenates a GNU tar multi-volume archive into a single tar archive. # Author: Bruno Haible <bruno@clisp.org>, Sergey Poznyakoff <gray@gnu.org.ua> # dump_type FILE [N] # Print type character from block N (default 0) of tar archive FILE dump_type() { dd if="$1" skip=${2:-0} bs=512 count=1 2>/dev/null | tr '\0' ' ' | cut -c157 } case `dump_type "$1"` in [gx]) PAX=1;; esac cat "$1" shift for f do SKIP=0 T=`dump_type "$f"` if [ -n "$PAX" ]; then if [ "$T" = "g" ]; then # Global extended header.... 2 blocks # Extended header........... 2 blocks # Ustar header.............. 1 block # FIXME: This calculation is will fail for very long file names. SKIP=5 fi else if [ "$T" = "V" ]; then T=`dump_type "$f" 1` fi if [ "$T" = "M" ]; then SKIP=$(($SKIP + 1)) fi fi dd skip=$SKIP if="$f" done
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