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Top Forums Shell Programming and Scripting how to read the contents of two files line by line and compare the line by line? Post 302620507 by mjavalkar on Sunday 8th of April 2012 02:32:24 PM
Old 04-08-2012
how to read the contents of two files line by line and compare the line by line?

Hi All,

I'm trying to figure out which are the trusted-ips and which are not using a script file.. I have a file named 'ip-list.txt' which contains some ip addresses and another file named 'trusted-ip-list.txt' which also contains some ip addresses. I want to read a line from 'trusted-ip-list.txt' file and check whether the read value exists in 'ip-list.txt' file and write some log info to some other file named 'checked-trust.log' file.

Here is the code i'm trying.. But I'm not able to do so Smilie Smilie..

Code:
trust_file=trusted-ip-list.txt
ip_file=ip-list.txt

while ip= read -r line
do
       test=`grep -w "$line" $ip_file`
       echo " "
       if [ "$ip" -e "$test" ] ; then
           echo "Trusted access at `date` by $line" > checked-trust.log
       else
           echo "Untrusted access at `date` by $line" > check-trust.log
       fi
done < "$trust_file"

Please help me in solving this.. Waiting for a helping hand..

Last edited by Scrutinizer; 04-08-2012 at 03:52 PM.. Reason: code tags
 

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FPRINTF(3)								 1								FPRINTF(3)

fprintf - Write a formatted string to a stream

SYNOPSIS
int fprintf (resource $handle, string $format, [mixed $args], [mixed $...]) DESCRIPTION
Write a string produced according to $format to the stream resource specified by $handle. PARAMETERS
o $handle -A file system pointer resource that is typically created using fopen(3). o $format - See sprintf(3) for a description of $format. o $args - o $... - RETURN VALUES
Returns the length of the string written. EXAMPLES
Example #1 fprintf(3): zero-padded integers <?php if (!($fp = fopen('date.txt', 'w'))) { return; } fprintf($fp, "%04d-%02d-%02d", $year, $month, $day); // will write the formatted ISO date to date.txt ?> Example #2 fprintf(3): formatting currency <?php if (!($fp = fopen('currency.txt', 'w'))) { return; } $money1 = 68.75; $money2 = 54.35; $money = $money1 + $money2; // echo $money will output "123.1"; $len = fprintf($fp, '%01.2f', $money); // will write "123.10" to currency.txt echo "wrote $len bytes to currency.txt"; // use the return value of fprintf to determine how many bytes we wrote ?> SEE ALSO
printf(3), sprintf(3), sscanf(3), fscanf(3), vsprintf(3), number_format(3). PHP Documentation Group FPRINTF(3)
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