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Full Discussion: How to detect awk and nawk?
Top Forums Shell Programming and Scripting How to detect awk and nawk? Post 302989456 by bakunin on Thursday 12th of January 2017 04:54:52 PM
Old 01-12-2017
Quote:
Originally Posted by mohtashims
Can you propose a solution that without having to tweak my 10 scripts at several places everytime i deploy them to a new set of servers the awk-nawk problem should be automatically addressed.
Yes: use a variable (which holds the path to the respective awk). I suppose which one to use depends on the OS used at the respective server, so something along these lines:

Code:
typeset AWK="/this/is/the/fallback/awk"         # default location

# determine value for "$OS" here

case $OS in
     A)
          AWK="/usr/bin/awk"
          ;;

     B)
          AWK="/path/to/nawk"
          ;;

     Solaris)
          AWK="/usr/xpg4/bin/awk"
          ;;

     [...]
esac

[...]

$AWK 'here goes script1 ...' /path/to/file

[...]

$AWK 'script2 ...' /path/to/other.file

[...]

I hope this helps.

bakunin
 

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LEARN ABOUT DEBIAN

shtool-path

SHTOOL-PATH.TMP(1)					      GNU Portable Shell Tool						SHTOOL-PATH.TMP(1)

NAME

       shtool-path - GNU shtool command dealing with shell path variables

SYNOPSIS

       shtool path [-s|--suppress] [-r|--reverse] [-d|--dirname] [-b|--basename] [-m|--magic] [-p|--path path] str [str ...]

DESCRIPTION

       This command deals with shell $PATH variables. It can find a program through one or more filenames given by one or more str arguments.  It
       prints the absolute filesystem path to the program displayed on "stdout" plus an exit code of 0 if it was really found.

OPTIONS

       The following command line options are available.

       -s, --suppress
	   Supress output. Useful to only test whether a program exists with the help of the return code.

       -r, --reverse
	   Transform a forward path to a subdirectory into a reverse path.

       -d, --dirname
	   Output the directory name of str.

       -b, --basename
	   Output the base name of str.

       -m, --magic
	   Enable advanced magic search for ""perl"" and ""cpp"".

       -p, --path path
	   Search in path. Default is to search in $PATH.

EXAMPLE

	#   shell script
	awk=`shtool path -p "${PATH}:." gawk nawk awk`
	perl=`shtool path -m perl`
	cpp=`shtool path -m cpp`
	revpath=`shtool path -r path/to/subdir`

HISTORY

       The GNU shtool path command was originally written by Ralf S.  Engelschall <rse@engelschall.com> in 1998 for Apache. It was later taken
       over into GNU shtool.

SEE ALSO

       shtool(1), which(1).

18-Jul-2008							   shtool 2.0.8 						SHTOOL-PATH.TMP(1)
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