Shell Programming and Scripting

Hi All,

How could I use telnet to connect to Primary Host in the below shell script:

Could I use:

(
echo user
sleep 2
echo password
sleep 2
echo "ls ~"
sleep 2
echo "exit"
) | telnet hostname


#-----------------------------------------------------------------------------
# Use SQL*Plus to query the MAX(SEQUENCE#) from both databases V$LOG_HISTORY
# view. If the STANDBY appears to be falling behind, then send alert mail..
#-----------------------------------------------------------------------------


OutFile=/tmp/stdby_chk_$$.out
sqlplus -s /nolog << __EOF__ > ${OutFile} 2>&1
whenever oserror exit 99
connect / as sysdba
set verify off

whenever sqlerror exit 6
col logseq_on_standby new_value V_STDBY_LOGSEQ
select /*+ rule */ max(h.sequence#) logseq_on_standby
from v\$log_history h,
v\$parameter p
where h.thread# = to_number(decode(p.value,'0',1,p.value))
and p.name = 'thread';

col filecnt new_value V_STDBY_FILECNT
select count(*) filecnt
from v\$datafile;

whenever sqlerror exit 7
connect ${_PriUnPwd}

whenever sqlerror exit 8
col logseq_on_primary new_value V_PRIMARY_LOGSEQ
select /*+ rule */ max(h.sequence#) logseq_on_primary
from sys.v_\$log_history h,
sys.v_\$parameter p
where h.thread# = to_number(decode(p.value,'0',1,p.value))
and p.name = 'thread';

col filecnt new_value V_PRIMARY_FILECNT
select count(*) filecnt
from v\$datafile;

whenever sqlerror exit 9
begin
if &&V_STDBY_LOGSEQ < &&V_PRIMARY_LOGSEQ - 2 then
--
if &&V_PRIMARY_FILECNT > &&V_STDBY_FILECNT then
--
raise_application_error(-20001,
'${_StdbyOraSid} is falling behind; datafile(s) were added to PRIMARY');
--
elsif &&V_PRIMARY_FILECNT < &&V_STDBY_FILECNT then
--
raise_application_error(-20002,
'${_StdbyOraSid} is falling behind; datafile(s) were dropped from PRIMARY');
--
else
--
raise_application_error(-20000,
'${_StdbyOraSid} is falling behind.');
--
end if;
--
end if;
end;
/
exit success
__EOF__
#
#-----------------------------------------------------------------------------
# Based on error code from SQL*Plus, compose an error message...
#-----------------------------------------------------------------------------
integer _Rtn=$?
case ${_Rtn} in
0) rm -f ${OutFile} ;; # ...everything is OK!
6) _Echo failure "Query of V\$LOG_HISTORY on STANDBY failed\n\n`cat ${OutFile}`\n" ;;
7) _Echo failure "unable to connect to PRIMARY" ;;
8) _Echo failure "Query of V\$LOG_HISTORY on PRIMARY failed\n\n`cat ${OutFile}`\n" ;;
9) _Echo failure "STANDBY is falling behind PRIMARY\n\n`cat ${OutFile}`\n" ;;
*) _Echo failure "SQL*Plus failed\n\n`cat ${OutFile}`\n" ;;
esac
rm -f ${OutFile}
#
#-----------------------------------------------------------------------------
# Done!
#-----------------------------------------------------------------------------
exit 0

Thanks for your time!

Regards,

do you have other programming tools, eg Perl,Python, SSH2 etc? these tools provide you better control over the "telnet" protocol and i suggest you use them if possible.