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Full Discussion: Reading and writing in same file
Top Forums Shell Programming and Scripting Reading and writing in same file Post 302696939 by kmajumder on Wednesday 5th of September 2012 09:51:25 PM
Old 09-05-2012
Reading and writing in same file
Hi All,

Here is my requirement. I am grepping through the log files and cutting some fields from the file to generate a csv file. Now I have to check if 2nd field is having some fixed value then with the help of 4th field I have to look in same log and run another grep command to retrieve the corresponding 2nd field to replace the fixed value.

Example:-
Code:
12345,none1111,55,link1
56789,dsadsad,66,ewqrrwe
23456,none1111,77,link2
65655,yuytuytds,88,ertywd

If second column equals 'none1111' then I have to run a grep command on same log file by searching for link1
Suppose the grep command returns me value 'abcde' for first row then I have to replace the 'none1111' with 'abcde'.
Same applies for link2.

Final output:-
Code:
12345,abcde,55,link1
56789,dsadsad,66,ewqrrwe
23456,efghi,77,link2
65655,yuytuytds,88,ertywd

Thanks in Advance.
Last edited by Franklin52; 09-06-2012 at 04:17 AM.. Reason: Please use code tags for data and code samples
 

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LEARN ABOUT OPENSOLARIS

grablogs.conf

grablogs.conf(4)						   File Formats 						  grablogs.conf(4)

NAME

       grablogs.conf - grablogs configuration for libgrablogs.so of the plugins of
	gnome-system-log file

SYNOPSIS

       /usr/lib/gnome-system-log/plugins/grablogs.conf

DESCRIPTION

       The  libgrablogs.so  is	a plugin for gnome-system-log(1), it colloct the log files from the system as many as possible. grablogs.conf is a
       configuration file that contains a set of lines mixed with sh(1) syntax codes and individual
	log files. libgrablogs.so will read the file try to get a log files list for
	gnome-system-log(1). Users can copy the file into $HOME/.gnome2/gnome-system-log/plugins/`uname -p` to overwrite the system default one.

       The grablogs.conf file contains the following configuration categories:

	      [configs]
		     Each line under this category is interpreted as a config file of System. The plugin will open the config file and try to find
		     all system paths of the logs.

	      [commands]
		     Each line under this category is interpreted as a shell command and will be execute through a pipe. And each line of the out-
		     put of the command will be interpreted as a log path.

	      [logs] Each line under this category is interpreted as a log path.

FILES

       /usr/lib/gnome-system-log/plugins/grablogs.conf
	      The system default configuration file for the plugin libgrablogs.so

       $HOME/.gnome2/gnome-system-log/plugins/`uname -p`/grablogs.conf
	      The user specific configuration file for the plugin libgrablogs.so

EMAMPLE

       [configs]
       /etc/syslog.conf
       [commands]
       for i in `svcs -aH -o FMRI | grep -v lrc `; do svcprop -p restarter/logfile $i  2>/dev/null  ||	svcprop  -q  -p  restarter/alt_logfile	$i
       2>/dev/null ; done
       [logs]
       /var/log/messages
       /var/log/secure
       /var/log/maillog
       /var/log/cron
       /var/log/Xorg.0.log
       /var/log/XFree86.0.log
       /var/log/auth.log
       /var/log/cups/error_log

SEE ALSO

       gnome-system-log(1), pipelog.conf(1)

gnome-utils 2.16.0						    13 Oct 2006 						  grablogs.conf(4)
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