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Full Discussion: Generic function which takes an array
Top Forums Shell Programming and Scripting Generic function which takes an array Post 302835055 by bakunin on Sunday 21st of July 2013 04:07:56 PM
Old 07-21-2013
Quote:
Originally Posted by Don Cragun
I did say in my earlier posting:
Quote:
If you have a 1993 or later version of the Korn shell
While this is absolutely correct there is a somewhat sophisticated trick by which it is possible to do the same in ksh88:

Code:
function caller {
typeset achArray[1]="foo"
typeset achArray[2]="bar"

callee achArray

return 0
}

function callee {
typeset -i iCnt=1

while [ $iCnt -le $(eval print \${#$1[*]}) ] ; do
    print - $(eval print - \${$1[$iCnt]})
done

return 0
}

Just in case it needs mentioning: possibility does not imply advisability. As the code above contradicts encapsulation (callee() uses variables that are silently inherited from caller() ) i wouldn't resort to such methods if there is any other and simpler way to do it. Sometimes, though, you just have no choice other than to be tricky.

I hope this helps.

bakunin
 

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LEARN ABOUT DEBIAN

ntalkd

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

NAME

     talkd -- remote user communication server

SYNOPSIS

     /usr/sbin/in.talkd [-dpq]

DESCRIPTION

     Talkd is the server that notifies a user that someone else wants to initiate a conversation.  It acts a repository of invitations, responding
     to requests by clients wishing to rendezvous to hold a conversation.  In normal operation, a client, the caller, initiates a rendezvous by
     sending a CTL_MSG to the server of type LOOK_UP (see <protocols/talkd.h>).  This causes the server to search its invitation tables to check
     if an invitation currently exists for the caller (to speak to the callee specified in the message).  If the lookup fails, the caller then
     sends an ANNOUNCE message causing the server to broadcast an announcement on the callee's login ports requesting contact.	When the callee
     responds, the local server uses the recorded invitation to respond with the appropriate rendezvous address and the caller and callee client
     programs establish a stream connection through which the conversation takes place.

OPTIONS

     [-d] Debug mode; writes copious logging and debugging information to /var/log/talkd.log.

     [-p] Packet logging mode; writes copies of malformed packets to /var/log/talkd.packets.  This is useful for debugging interoperability prob-
     lems.

     [-q] Don't log successful connects.

SEE ALSO

     talk(1), write(1)

HISTORY

     The talkd command appeared in 4.3BSD.

Linux NetKit (0.17)						  March 16, 1991					       Linux NetKit (0.17)
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