On Wed, Dec 26, 2001 at 05:56:52AM +0530, mukund wrote:
>
> It may sound absurd but i am stuck up.
>
> How do i communicate with a running process from command line?
>
> The daemon is written by me in perl, it accept username:passwd
> string and returns OK or NOOK, depending on passwd match.
> ps -A gives the PID of daemon.
>
> Any Idea?
>
>
---end quoted text---
Did'nt get the problem clearly. Do you want to execute some
program if OK and quit if NOOK ? There is no way you can
modify the execution strategy of a daemon itself during ex-
ecution.
Normally if daemons are running, you write a .pid file in
/var/run, and check for its existance from the second prog-
ram if you want the second program to run depending upon
the pid status. As root, you can ofcourse grep ps output
and take necessary action. You can also kill the process if
so desired with 'kill <process-id>'. The same is true if
the perl script has been invoked as an user and killed by
the same user.
However, for a process started by root, which may be used
by users, /var/run/progname.pid is perhaps the better app-
roach, if users are to start another process based on the
daemon status.
Bish
--
:
####[ Linux One Stanza Tip (LOST) ]###########################
Sub : Listing partition LOST #067
To know the total size of hard disk inclusive of Non-Linux and
non-formatted partitions, as root do:
#echo p | fdisk /dev/hdX 2> /dev/null
(where X is a, b, c etc)
OR #fdisk -l (this will list all drives together)
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