Problems with cut Post: 302189810

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Top Forums Shell Programming and Scripting Problems with cut Post 302189810 by era on Monday 28th of April 2008 02:33:52 AM

04-28-2008

Registered User

You need to properly quote your variables when you echo them, otherwise the shell will trim whitespace. I'd advise against using echo at all, though.

But here's how to quote properly. To be a little bit on the safe side, I also zap IFS; I don't believe it's strictly necessary here, but it's a technique you should be aware of.

Code:

OLDIFS=$IFS
IFS='
' # just a newline, in single quotes
while read data
do
  MSISDN="`echo "$data" | cut -c1-10`"
  HOUR="`echo "$data" | cut -c11-16`"
  ID_SA_SOURCE="`echo "$data" | cut -c17-35`"
  ID_SA_DEST="`echo "$data" | cut -c36-54`"
done < $TRACKING_LOGDIR/$listdata
IFS=$OLDIFS

Having that out of the way, how about something like this?

Code:

awk '{ OFS=":"; print substr($0, 1, 10), substr($0, 11, 16),
    substr($0, 17, 35), substr($0, 17, 35) }' $TRACKING_LOGDIR/$listdata |
while IFS=: read MSISDN HOUR ID_SA_SOURCE ID_SA_DEST; do
  echo "'$HOUR': All your '$ID_SA_SOURCE' are '$ID_SA_DEST' to '$MSISDN'"
done

era

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igawk

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)