Re: [opensuse] How to remove binary garbage from the front of a binary file??

13 Aug 2018


      On 08/12/2018 01:00 PM, Bernhard Voelker wrote:
...
# Create a binary testfile file with a '!BDN' marker.
$ { cat /usr/bin/cat; printf '!BDN'; cat /usr/bin/cat; } > testfile
# Use awk(1) to print everything after and including the marker.
awk 'BEGIN{RS="!BDN";ORS=""} {if(n++)print}' < testfile >  testfile2
Or use 'grep --byte-offset --binary-files=text --only-matching --fixed-strings' to find
the marker (stripping off the matched pattern after and including the ':'):

  $ n="$( grep -baoF '!BDN' testfile | cut -d: -f1 )"

and then let dd copy all from that position:

  $ dd \
      if=testfile \
      of=testfile2-dd \
      status=none \
      bs=1 \
      iflag=skip_bytes \
      skip="$n"

Have a nice day,
Berny

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