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Full Discussion: awk not behaving as expected
Top Forums Shell Programming and Scripting awk not behaving as expected Post 302863269 by maks475 on Sunday 13th of October 2013 02:26:12 PM
Old 10-13-2013
Question awk not behaving as expected

Hi,

Immediate help on below will be appreciated.

I have to read a file (max of 10MB) which will have no new line characters, i.e. data in single line. and have to inster '\n' at every 100 characters. and if record starts with 'BUCA' then need to pick value of length 10 at position 71 and write it to a file otherwise drop the record.

I tried below, working fine up to inserting '\n' after every 100 characters but sending all the records into target file.

Code:
awk 'BEGIN { len = 100 } length <=100  { print; next }; { print substr($0,1,len); $0 = substr( $0, len+1); while ( length >= 100 ) {; printf "%s\n", substr($0,0,len); $0 = substr( $0, len+1) }; if ( length ) {; if( substr($0, 1, 4) ~ /"BUCA"/ ) {; print substr($0, 71, 10) } } }' "src_file.txt" > tgt_file.txt

(No new lines in the above script, only single line)
Also taking too much time for processing 10MB file (more than 5mins).

Don't know where I did mistake, Please correct me.

Thanks In Advance.

Smilie

Last edited by Scott; 10-13-2013 at 03:42 PM.. Reason: Added code tags
 

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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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