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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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DDB(8)							    BSD System Manager's Manual 						    DDB(8)

NAME
ddb -- configure DDB kernel debugger properties SYNOPSIS
ddb capture [-M -core] [-N -system] print ddb capture [-M -core] [-N -system] status ddb script scriptname ddb script scriptname=script ddb scripts ddb unscript scriptname ddb pathname DESCRIPTION
The ddb utility configures certain aspects of the ddb(4) kernel debugger from user space that are not configured at compile-time or easily via sysctl(8) MIB entries. To ease configuration, commands can be put in a file which is processed using ddb as shown in the last synopsis line. An absolute pathname must be used. The file will be read line by line and applied as arguments to the ddb utility. Whitespace at the beginning of lines will be ignored as will lines where the first non-whitespace character is '#'. OUTPUT CAPTURE
The ddb utility can be used to extract the contents of the ddb(4) output capture buffer of the current live kernel, or from the crash dump of a kernel on disk. The following debugger commands are available from the command line: capture [-M core] [-N system] print Print the current contents of the ddb(4) output capture buffer. capture [-M core] [-N system] status Print the current status of the ddb(4) output capture buffer. SCRIPTING
The ddb utility can be used to configure aspects of ddb(4) scripting from user space; scripting support is described in more detail in ddb(4). Each of the debugger commands is available from the command line: script scriptname Print the script named scriptname. script scriptname=script Define a script named scriptname. As many scripts contain characters interpreted in special ways by the shell, it is advisable to enclose script in quotes. scripts List currently defined scripts. unscript scriptname Delete the script named scriptname. EXIT STATUS
The ddb utility exits 0 on success, and >0 if an error occurs. EXAMPLES
The following example defines a script that will execute when the kernel debugger is entered as a result of a break signal: ddb script kdb.enter.break="show pcpu; bt" The following example will delete the script: ddb unscript kdb.enter.break For further examples, see the ddb(4) and textdump(4) manual pages. SEE ALSO
ddb(4), textdump(4), sysctl(8) HISTORY
The ddb utility first appeared in FreeBSD 7.1. AUTHORS
Robert N M Watson BUGS
Ideally, ddb would not exist, as all pertinent aspects of ddb(4) could be configured directly via sysctl(8). BSD
December 24, 2008 BSD
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