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Full Discussion: One more awk question!
Top Forums Shell Programming and Scripting One more awk question! Post 59083 by zazzybob on Thursday 9th of December 2004 09:42:23 AM
Old 12-09-2004
What do you mean search up? Do you want to search the file from bottom line to top line?

You could do something like (if you have the tac command - Linux should have)

Code:
tac my_file | awk '{do something}'

Either way, you're not going to be able to achieve this in the "same" awk statement as you've posted.

You can, however (if searching from top to bottom doesn't bother you), just add another action to the existing awk.

e.g.
Code:
awk '
{
  if ($0 ~ /STRING1/) {
     c++
  } 
}
{ 
  if ( c == 2 ) {
     sub(/STRING1/,"NEWSTRING") 
  } 
} 
# perform some other substitution
{ sub(/FOO/,"BAR") }

{ print }' FILE

Cheers
ZB
 

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LEARN ABOUT LINUX

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)
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