Scripting Question

[dial8d]

Ok, I have found a solution to this, but it looks a little ugly, so i thought id see if you guys can come up with something more elegant.

Im creating a first boot script resource for use with NIM automated installs. I want the fb_script to do lots of things, but the part i have been puzzling with is how to get it to edit the /etc/rc.tcpip file on the newly installed AIX server.

For example, xntpd is by default disabled in /etc/rc.tcpip, and i want the fb_script to enable it by removing the leading #.

# Start up Network Time Protocol (NTP) daemon
#start /usr/sbin/xntpd "$src_running"

My 1st thought was to use sed, and i come up with this, which does work, but looks pretty ugly.

sed '/xntpd/s/^\#start \/usr\/sbin\/xntpd \"\$src_running\"/start \/usr\/sbin\/xntpd \"\$src_running\"/' /etc/rc.tcpip

A colleague came up with something a little shorter.

cat /etc/rc.tcpip | sed "s/#\(start.*xntpd.*\)/\1/" | grep xntpd

Im sure there are a million ways this can be done, so I thought id open this up for discussion.

 

[Breslau]

how about appending the line to the end of the file?

 

[dial8d]

yes, i did think about doing that. I guess theres no real reason not to do it like that, other than i thought it would be nice to retain the original format of the file.

I guess im just picky !

 

[p5wizard]

[tt]echo "/\/usr\/sbin\/xntpd\ns/^#//\nw\nq"|ed /etc/rc.tcpip[/tt]

or

[tt]echo "/\/usr\/sbin\/xntpd
s/^#//
w
q"|ed /etc/rc.tcpip[/tt]

The echo provides 4 ed commands in order to edit the file:
search for xntpd line
substitute initial "#" with empty string
write
quit


HTH,

p5wizard