[[blobutils]]
 

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user:jenda:blobutils [2015/09/24 06:53]
jenda plot, sum, itemize
user:jenda:blobutils [2015/11/20 00:50] (current)
jenda blcstruct, gr-pack
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 +===== blobutils =====
  
 +Tools to manipulate binary data in Unix, because it was a nightmare.
 +
 +They are not fast (written in shell and Python), I usually need to convert only several bytes, so it does not matter.
 +
 +http://​jenda.hrach.eu/​gitweb/?​p=blobutils;​a=summary
 +
 +Terms: bin: raw binary data; bits: ascii '​0'​ and '​1';​ hex: ascii hexdump
 +
 +blbgrep: grep binary file
 +<​code>​
 +> blbgrep data.bin 04 ee 04 7e
 +data.bin:<​offset>​
 +</​code>​
 +blbinhex: hexdump (binary to hexa)
 +
 +blbithex: bits to hex
 +<​code>​
 +> echo 1110 0011 | blbithex
 +E3
 +</​code>​
 +
 +blcstruct: unpack C structure, e.g. "​blcstruct f" unpacks array of floats
 +
 +blhexbin: hex to binary
 +
 +blhexbit: hex to bits
 +
 +blhexbitmap:​ hex to black and white image (e.g. adafruit gfx format)
 +<​code>​
 +echo 22 54 54 78 42 | blhexbitmap
 +██ ███ █
 +█ █ █ ██
 +█ █ █ ██
 +█    ███
 +█ ████ █
 +</​code>​
 +
 +blhexflip: interactive binary editor
 +
 +blhexrev: no idea
 +
 +blrev: MSB to LSB format
 +
 +blxor: 64bit xor (used heavily during implementation of A5/1 cracker)
 +
 +dechex, dechex: base convert
 +
 +gp.sh: 1D data plot. First column is label, second value. Parameter is filename.
 +<​code>​
 +echo -e "bla -7.247 \nble 3.28 \nfoo 0.3 \nxx 1" | gp.sh my_numbers
 +</​code>​
 +
 +gr-pack, gr-unpack: convert binary to gnuradio bytes and back
 +
 +itemize: add line numbers (I did not know about nl command back then)
 +
 +sum.sh: sum numbers, one per line
 +<​code>​
 +echo -e "​-7.247 \n 3.28 \n 0.3 \n 1" | sum.sh
 +-2.667
 +</​code>​
 +
 +udate: unix timestamp to human-readable date
 
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