Mark Swayne wrote: > I'm trying to get a pass_persist based extension working with my > Net-SNMP install. > > I have the handler registered in snmpd.conf: > > pass_persist .1.3.6.1.4.1.9999 /usr/local/bin/test.pl > > After the PING/PONG response, the code seems to get an EOF and the input > reception loop terminates: > <SNIP>
> I am running Net-SNMP version 5.4.1 on an Ubuntu 8.10 system. Perl is > version 5.8.8. > I found the problem--for future reference, here is the solution: After looking at pass_persist.c and debugging output in the logs, I found that my PONG output from my script was being ignored/incorrectly interpreted by snmpd. This lead me to suspect that there were some shenanigans going on with character encoding. Adding explicit encoding to my Perl solved the issue: binmode(STDIN, ':bytes'); binmode(STDOUT, ':bytes'); In addition, it is important to disable buffering on the output of your Perl. If your handler hangs after acknowledging the snmpd's PING command, the problem is probably due to the way STDOUT is buffered changes based on how a program is called. When called from a tty, STDOUT is line buffered, otherwise it is block buffered. So you either need to flush it manually or just disable buffering by setting $| = 1; --Mark Swayne ------------------------------------------------------------------------------ Enter the BlackBerry Developer Challenge This is your chance to win up to $100,000 in prizes! For a limited time, vendors submitting new applications to BlackBerry App World(TM) will have the opportunity to enter the BlackBerry Developer Challenge. See full prize details at: http://p.sf.net/sfu/blackberry _______________________________________________ Net-snmp-users mailing list Net-snmp-users@lists.sourceforge.net Please see the following page to unsubscribe or change other options: https://lists.sourceforge.net/lists/listinfo/net-snmp-users
