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Top Forums Shell Programming and Scripting Parsing to_addr field in bash Post 303001018 by jim mcnamara on Tuesday 25th of July 2017 10:18:51 AM
Old 07-25-2017
You will have to write a parser in awk to handle unvalidated user input like that.

IF you have Linux - gawk should be there. Try regular expressions for field delimiting patterns:

Example:
Code:
gawk -vFPAT='[^,]*|"[^"]*"'   '{ your code to print goes here, split with FPAT }' somefile

You can use alternation:
Code:
 -vFPAT='(pattern set 1|pattern set 2|pattern set 3)'

You can also declare fields with
Code:
awk -F 'regex goes here' {code here}' somefile

I cannot give you a fixed set of rules to use, it looks like you do not have a complete set yet. You should do some serious validation on the input to that dataset so you do not get difficult formatting problems. Otherwise you may have to resort to using some bizarre character as a field delimiter. Maybe high ASCII > 127.
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IGAWK(1)							 Utility Commands							  IGAWK(1)

NAME
igawk - gawk with include files SYNOPSIS
igawk [ all gawk options ] -f program-file [ -- ] file ... igawk [ all gawk options ] [ -- ] program-text file ... DESCRIPTION
Igawk is a simple shell script that adds the ability to have ``include files'' to gawk(1). AWK programs for igawk are the same as for gawk, except that, in addition, you may have lines like @include getopt.awk in your program to include the file getopt.awk from either the current directory or one of the other directories in the search path. OPTIONS
See gawk(1) for a full description of the AWK language and the options that gawk supports. EXAMPLES
cat << EOF > test.awk @include getopt.awk BEGIN { while (getopt(ARGC, ARGV, "am:q") != -1) ... } EOF igawk -f test.awk SEE ALSO
gawk(1) Effective AWK Programming, Edition 1.0, published by the Free Software Foundation, 1995. AUTHOR
Arnold Robbins (arnold@skeeve.com). Free Software Foundation Nov 3 1999 IGAWK(1)
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