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Top Forums Shell Programming and Scripting Check for length which exceeds specified length in a line Post 302735727 by pamu on Monday 26th of November 2012 04:22:38 AM
Old 11-26-2012
Try sth like this.. adapting Rudic's sollution..

Code:
$ cat file
name, city, zipcode, state
checking,the, lengthof, string

$ awk -F, 'BEGIN {split("5,6,7,8",len,",");  OFS=","}
NR==1{split($0,P,",")}
NR>1{for (i=1; i<=NF; i++) if(length($i) > len[i]) {$i = substr($i,1,len[i]); arr=arr?arr" "P[i]:P[i]}
if (arr) {$(NF+1)=" Fields "arr" exceed the length."; arr=""}
}1' file

name, city, zipcode, state
check,the, length, string, Fields name  zipcode exceed the length.

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explain_truncate_or_die(3)				     Library Functions Manual					explain_truncate_or_die(3)

NAME
explain_truncate_or_die - truncate a file and report errors SYNOPSIS
#include <libexplain/truncate.h> void explain_truncate_or_die(const char *pathname, long long length); DESCRIPTION
The explain_truncate_or_die function is used to call the truncate(2) system call. On failure an explanation will be printed to stderr, obtained from explain_truncate(3), and then the process terminates by calling exit(EXIT_FAILURE). This function is intended to be used in a fashion similar to the following example: explain_truncate_or_die(pathname, length); pathname The pathname, exactly as to be passed to the truncate(2) system call. length The length, exactly as to be passed to the truncate(2) system call. Returns: This function only returns on success. On failure, prints an explanation and exits. SEE ALSO
truncate(2) truncate a file to a specified length explain_truncate(3) explain truncate(2) errors exit(2) terminate the calling process COPYRIGHT
libexplain version 0.52 Copyright (C) 2008 Peter Miller explain_truncate_or_die(3)
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