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Shell Programming and Scripting
Need help to copy the lease info block
Post 302401095 by SMNK on Friday 5th of March 2010 01:08:53 AM
03-05-2010
Code:
Input: ./xxx.sh 4 00:23:5e:04:4a:20/1/230 00:1d:45:56:b0:e2/2/239 00:19:06:eb:0a:98/3/238 00:ff:ff:ff:ff:ff/4/237
For Example
consider above input)Iteration 1:
check for 00:23:5e:04:4a:20 which is stored in mac[0]
and consider original lease file contains IP as .237 for this MAC,
Now i have to find this mac[0] in the lease info and and update the IP as .240 according to the value passing after MAC(ie.,1 in first case)
i have sort out how to find the particular IP in case of variable number of lines between IP and MAC..
Solution Needed:
update the IP using MAC id and copy the contents of that changed lease info to some file.
i used grep option "before" and "after" to copy the lines, sed to change the IP.....case is now that lines are variable....
Code:
sed s/${ip_addr[i]}/$ch_ip/g $temp_file | grep -B5 "${mac[$i]}" >> $persistent_file
sed s/${ip_addr[i]}/$ch_ip/g $temp_file | grep -A4 "${mac[$i]}" | grep -v "${mac[$i]}" >> $persistent_fileLast edited by Scott; 03-05-2010 at 02:14 AM.. Reason: Code tags please...
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LEARN ABOUT DEBIAN
dhclient.leases
dhclient.leases(5) File Formats Manual dhclient.leases(5) NAME
dhclient.leases - DHCP client lease database DESCRIPTION
The Internet Systems Consortium DHCP client keeps a persistent database of leases that it has acquired that are still valid. The database is a free-form ASCII file containing one valid declaration per lease. If more than one declaration appears for a given lease, the last one in the file is used. The file is written as a log, so this is not an unusual occurrence. The format of the lease declarations is described in dhclient.conf(5). FILES
DBDIR/dhclient.leases SEE ALSO
dhclient(8), dhcp-options(5), dhclient.conf(5), dhcpd(8), dhcpd.conf(5), RFC2132, RFC2131. AUTHOR
dhclient(8) was written by Ted Lemon under a contract with Vixie Labs. Funding for this project was provided by Internet Systems Consor- tium. Information about Internet Systems Consortium can be found at https://www.isc.org. dhclient.leases(5)