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expect logic

Posted by pret (pret), 3 January 2006
hi iam new to expect infact new to scripting

set PING "ping"

proc newpingDev { newipAddr } {
       global PING PING_TIMEOUT


            exp_send --   "$PING $newipAddr\r"
             # spawn ping $newipAddr\r
       while (1) {
               expect {
                       "*bytes from * time*"  {
                               return "SUCCESS"
                       }
                       "*is alive*"  {
                               return "SUCCESS"
                       }
                       "*Destination Host Unreachable*"  {

                              return "FAILED"
                       }
                       "*Network is unreachable*"  {
                                                                                      return "FAILED"
                       }
                       "*no answer from*"  {
                               return "FAILED"
                       }
                       "unknown host" {
                              return "FAILED"
                       }
                       "*Usage*"  {
                               return "FAILED"
                       }
                       timeout {
                              return "FAILED"
                       }
               }
       }



}


set newip "160.48.58.39"
set devIp "1.1.1.1"

set rval [eval newpingDev $devIp]
puts " the return value from newiptest is $rval"


if { $rval == "FAILED" } {
    set _rval [eval newpingDev $newip]
    puts " the return value from newiptest is $_rval"


}


the new ip is pingabble and devip is dummy ip so when i i run the script
with send  its says both the ip are not pingable and returns failed where
as when i use spawn ping ipadrres in the function i could ping the second ip   why i sthis happ.i need to use send command instead of spawn
.canu pls help ..this is a test program  my real program is when the first ping failed to ping address then it should ping then next one but when i use send command thats not working

i telnet in to multiple device and pipng it so after telnet i cannot spawn a ping sesssion so i need to use a send command but its not working ..any help pls


Posted by admin (Graham Ellis), 4 January 2006
1. You say "it's not working".  Can you tell us what actually happens  as that will give a further clue as to what is going wrong.

2. You mention telnet, but I don't see any spawn of a telnet - perhaps the program you've posted is incomplete?   If you could come up with a short, complete example showing what's going wrong we might be able to help you a little better.

Use spawn to start a process, then send and expect to communicate with it; if you don't start off with a spawn, you can't send or expect.



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