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Full Discussion: Blank Lines - End of file
Top Forums Shell Programming and Scripting Blank Lines - End of file Post 38382 by criglerj on Tuesday 15th of July 2003 11:55:02 AM
Old 07-15-2003
Here's the same solution as oombera's though written in a more awk-like and less C-like fashion. Note that I'm also changing the problem somewhat: This will trim trailing lines consisting only of blanks and tabs (i.e., apparently empty) as well as truly empty lines:
Code:
#!/usr/bin/awk -f
NF == 0 { nb++ ; next }
nb      { for (i = 1; i <= NF; i++) print "" }
        { nb = 0; print }

Invoke it the same way as oombera's code. If you want only the truly empty lines to be whacked off the end, just change the first test to length == 0.
 

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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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