[rancid] PHP creating a telnet session via Expect

[ccusmith at aol.com]

I have a webpage that is in HTML and PHP.  In PHP I have tried using exec, system, shell_exec and passthru functions to call an Expect Script file (temp.exp).  This expects file spawns a telnet session that uses "expect/send" commands to retrieve information from an environmental unit (not a normal server).  This data is placed in a file and then loaded to the webpage.  

The problem is if I call "./temp.exp" it runs great, but when I call the same program from the webpage exec("./temp.exp") using PHP (because it retrieves the data is displayed in the webpage), it will connect but then stops responding.  It never returns the password prompt to achieve a yes to move on.  

I inserted “exp_internal 1” in the expect file to produce the diagnostic results.  

When temp.exp is ran manually
spawn telnet 111.111.11.111
parent: waiting for sync byte
parent: telling child to go ahead
parent: now unsynchronized from child
spawn: returns {18790}
expect: does "" (spawn_id exp5) match glob pattern "Password:"? no
Trying 111.111.11.111...
Connected to 111.111.11.111.
Escape character is '^]'.
Password: 
expect: does "Trying 111.111.11.111...\r\nConnected to 111.111.11.111.\r\nEscape character is '^]'.\r\nPassword: " (spawn_id exp5) match glob pattern "Password:"? yes
expect: set expect_out(0,string) "Password:"
expect: set expect_out(spawn_id) "exp5"


When temp.exp is called from the webpage
spawn telnet 111.111.11.111
parent: waiting for sync byte
parent: telling child to go ahead
parent: now unsynchronized from child
spawn: returns {19909}
expect: does "" (spawn_id exp19) match glob pattern "Password:"? no
Trying 111.111.11.111...
Connected to 111.111.11.111.
Escape character is '^]'.
expect: does "Trying 111.111.11.111...\r\nConnected to 111.111.11.111.\r\nEscape character is '^]'.\r\n" (spawn_id exp19) match glob pattern "Password:"? no
expect: timed out

I have checked/changed the Apache user, the permissions and ownership of the files are fine.   I have put debug on the expect and the telnet sessions.  I have specified the telnet used and the port.  I have upgraded my Tcl/Tk.   The link http://unix.derkeiler.com/Newsgroups/comp.unix.shell/2005-06/0454.html is similar but I am not getting the "setsocket(SO_DEBUG):Permission denied" error and that solution did not work for me.   

 

System info

# find / -name telnet

/usr/bin/telnet

/usr/ucb/telnet

# expect -v

expect version 5.40.0

 

Below are versions that I have tried.

 

The script 1

#!/usr/local/bin/expect

exp_internal -f /opt/xampp/htdocs/temp/diag.txt 1

spawn -nottycopy /bin/telnet -d 111.11.11.111 23

sleep 3

expect "Password:"

send "OMNI\r"

expect "X. Exit (end connection)"

send "p\r"

expect ">"

log_file -noappend -a "/opt/xampp/htdocs/temp/data.txt" 

 

#Sensor Name     POS3      Temp Sensor     1

send "GET 3052.5.1.1.1.1.4.3.1.1\r"

sleep 3

expect "1.3.6.1.4.1.3052.5.1.1.1.1.4.3.1.1"

 

#Read Out        POS3      Temp Sensor     1

send "GET 3052.5.1.1.1.1.6.3.1.1\r"

sleep 3

expect "1.3.6.1.4.1.3052.5.1.1.1.1.6.3.1.1"

 

#Read Out        POS3      Humidity Sensor 2

send "GET 3052.5.1.1.1.1.6.3.3.1\r"

sleep 3

expect "1.3.6.1.4.1.3052.5.1.1.1.1.6.3.3.1"

 

log_file

send "BYE\r"

exit 0

 

 

 

 

The script 2

#!/usr/local/bin/expect -f 

exp_internal -f /opt/xampp/htdocs/temp/diag.txt 1

set force_conservative 1 ;# set to 1 to force conservative mode even if 

                          ;# script wasn't run conservatively originally 

if {$force_conservative} { 

        set send_slow {1 .1} 

        proc send {ignore arg} { 

                sleep .1 

                exp_send -s -- $arg 

        } 

} 

set timeout 3 

spawn $env(SHELL) 

match_max 100000 

send -- "telnet 111.11.11.111\r" 

expect "Password: "

send -- "OMNI\r"

expect "X. Exit (end connection)"

send -- "p\r"

expect ">"

log_file -noappend -a "/opt/xampp/htdocs/temp/data.txt" 

 

#Sensor Name     POS3      Temp Sensor     1

send -- "GET 3052.5.1.1.1.1.4.3.1.1\r"

sleep 3

expect "1.3.6.1.4.1.3052.5.1.1.1.1.4.3.1.1"

 

#Read Out        POS3      Temp Sensor     1

send -- "GET 3052.5.1.1.1.1.6.3.1.1\r"

sleep 3

expect "1.3.6.1.4.1.3052.5.1.1.1.1.6.3.1.1"

 

#Read Out        POS3      Humidity Sensor 2

send -- "GET 3052.5.1.1.1.1.6.3.3.1\r"

sleep 3

expect "1.3.6.1.4.1.3052.5.1.1.1.1.6.3.3.1"

 

log_file

send -- "BYE\r"

exit 0
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