[rancid] Re: PHP creating a telnet session via Expect

[Lance Vermilion]

I would look at what term you are using and how that differs from PHP to
expect. Also create a basic php script to execute the expect script and see
if it works through cli. if that works then check through apache. if it
fails through apache it might be because of a term issue.

On Thu, Jun 19, 2008 at 11:44 AM, <ccusmith at aol.com> wrote:

> 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\n*Password: " (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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