how to start perl script via ssh?

lene · 08-09-2007, 10:13 AM

Good afternoon to everybody!
i want to execute the perl script which would monitor some parameters in the network like jitter, bandwidth ...so on
i want all the process to be automated so i wrote bash file which is evoked via ssh

#!/bin/sh
killall mgen;
cd root/myfolder/mgen;
mgen input listenscript.mgn | ./mgenparse.pl $@

first of all it kills mgen traffic generator if it is running and then it should start new instance of mgen which will forward the output into mgenparse.pl perl script.
inside the perl script i do have redirection back to reply.sh

ssh root@10.1.1.12 /opt/java.1.6/bin/java class.monitor $@;

when i run all this it seems that first bash is running but i have doubts if mgenparse.pl starts
at all and whether it makes the reply back via reply.sh, i use pub.key authentication so no password is required.
I have doubts whether the format of bash file is correct so far...
can somebody help me?

thanks

fvu · 08-09-2007, 02:28 PM

You might try quoting "$@" always. This preserves whitespace and is normally desired. Example:

Code:

$> set -- 'foo bar'  # Single argument 'foo bar'
$> for i in $@; do echo arg: $i; done  # $@ (unquoted) becomes two arguments
arg: foo
arg: bar
$> for i in "$@"; do echo arg: $i; done  # "$@" (quoted) stays one argument
arg: foo bar

See also:
http://fvue.nl/wiki/Bash:_Difference_between_$@_and_$*

Freddy Vulto
http://fvue.nl/wiki/Bash

lene · 08-10-2007, 06:34 AM

thanks but still no result...
for now i get the following type or errors:

mgen version 4.0x6
mgen: starting now...
UdpSocket: bind() error: Address already in use
MgenSocketList::Item::Open() Error: socket open error
MgenProcessDrecEvent (LISTEN) Error:socket open error on port 5000
MgenProcessDrecEvent (IGNORE) Error:no socket on port 5000
mgen: Done

fvu · 08-10-2007, 02:34 PM

Looks like mgen errors on server...? Try ssh to server and execute the command manually.

If you want to check if mgenparse.pl starts, write message to log file within mgenparse.pl and check log file afterwards.

lene · 10-24-2007, 02:37 AM

ok, merci, finally its working

lsteacke · 10-24-2007, 07:20 AM

Just curious, where did you learn about mgen?? and was it a socket problem?

lene · 10-24-2007, 09:13 AM

we needed traffic generator, so we found it!

http://cs.itd.nrl.navy.mil/work/mgen/
well about the problem...it was solved with
killall mgen
line which i put in the beginning of the script, so i just release socket by forcing to quit any running instance of mgen.
But i noted some other strange thing,
I have written script for generation of traffic like for 6 min, but while executing i noted that sometimes it just drops...so like run 2-3 min and then i do not observe traffic anymore...