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1 | #!/bin/bash | |
2 | ||
3 | for FILE_PATH; do | |
4 | - | HEAD_FLAGS="0x$(od -x -N20 "$FILE_PATH" | awk 'NR=1{print $7;exit}')" # read first 20 bytes from file |
4 | + | # read first 20 bytes from file and exctract 11th and 12th bytes as hexadecimal value: |
5 | HEAD_FLAGS="0x$(od -x -N20 "$FILE_PATH" | awk 'NR=1{print $7;exit}')" | |
6 | VOLUME_FLAG="0x0001" | |
7 | FIRST_FLAG="0x0100" | |
8 | ||
9 | if [ $(($HEAD_FLAGS&$VOLUME_FLAG)) -ne 0 ]; then # is volume | |
10 | if [ $(($HEAD_FLAGS&$FIRST_FLAG)) -ne 0 ]; then # is first volume | |
11 | echo "$FILE_PATH is the first volume" | |
12 | else | |
13 | echo "$FILE_PATH is NOT the first volume" | |
14 | fi | |
15 | else # is regular, single rar archive | |
16 | echo "$FILE_PATH is a regular, single RAR-file" | |
17 | fi | |
18 | done |