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Top Forums UNIX for Beginners Questions & Answers Using sed to split hex string Post 303037222 by sand1234 on Friday 26th of July 2019 09:13:41 AM
Old 07-26-2019
Using sed to split hex string

Hi,

I'm looking to split the following hex string into rows of four elements.

I've tried the following but it doesn't seem to work. How can I tell sed to match based on a pair of number(s) and letter(s), and add a newline every 4 pairs?
In addition, I need to add another newline after every string has been processed.

Code:
echo "1C 50 A9 D3 8B B0 24 9C 14 1C 50 A9 D3 8B B0 24" | sed -nr 's/[0-9A-Z]{2}/\n/4p'
1C 50 A9
 8B B0 24 9C 14 1C 50 A9 D3 8B B0 24 9C 14

Expected output:

Code:
1C 50 A9 D3
8B B0 24 9C

14 1C 50 A9
D3 8B B0 24

 

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SPLIT(1)						      General Commands Manual							  SPLIT(1)

NAME
split - split a file into pieces SYNOPSIS
split [ option ... ] [ file ] DESCRIPTION
Split reads file (standard input by default) and writes it in pieces of 1000 lines per output file. The names of the output files are xaa, xab, and so on to xzz. The options are -n Split into n-line pieces. -e expression File divisions occur at each line that matches a regular expression; see regexp(6). Multiple -e options may appear. If a subex- pression of expression is contained in parentheses (...), the output file name is the portion of the line which matches the subex- pression. -f stem Use stem instead of x in output file names. -s suffix Append suffix to names identified under -e. -x Exclude the matched input line from the output file. -i Ignore case in option -e; force output file names (excluding the suffix) to lower case. SOURCE
/sys/src/cmd/split.c SEE ALSO
sed(1), awk(1) grep(1), regexp(6) SPLIT(1)
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