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Top Forums Shell Programming and Scripting How to auto correct a failing command? Post 302989909 by Ivo Breeden on Thursday 19th of January 2017 05:04:48 PM
Old 01-19-2017
But sometimes one can do someting with nonportable options.
One example is the echo command. For ages I used echo \t\b\n to echo tab, bel or newline. But this does not work anymore in bash. If you want echo to interpret escaped characters, you must use the -e option: echo -e \t\b\n .
So portable scripts often use this construction:
Code:
if echo '\t' |grep t >/dev/null 
then   
  # -e option needed to interpret \t \n etc.
  ECHOOPTS=-e
else   
  # No options needed
  ECHOOPTS=""
fi
echo $ECHOOPTS "col1\tcol2\tcol3\n"

So this is what you can do: use variables to store options.
 

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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). ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +--------------------+-----------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +--------------------+-----------------+ |Availability | SUNWgawk | +--------------------+-----------------+ |Interface Stability | Volatile | +--------------------+-----------------+ NOTES
Source for gawk is available on http://opensolaris.org. Free Software Foundation Nov 3 1999 IGAWK(1)
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