EXPECT(1)                                               EXPECT(1)

     NAME
          at, drain, expect, pass - dialer scripting tools

     SYNOPSIS
          dial/at [ -q ] [ -t seconds ] atcommand
          dial/expect [ -iq ] [ -t seconds ] goodstring [ badstring...
          ]
          dial/drain
          dial/pass [ -q ]

     DESCRIPTION
          These commands are used to write telephone dialing scripts,
          mostly for PPP sessions.  They all expect standard input and
          output to be connected to a communications device, e.g, a
          serial line to a modem.  They communicate with the user
          using /dev/cons.

          At sends atcommand to the modem prefixed with the string at.
          It then reads from the modem expecting an AT response. At
          will return success if it gets and OK of CONNECT response.
          Otherwise it will return the response as an error status.
          The options are:

          -t   set the timeout to seconds. The default is 300.

          -q   don't write to /dev/cons what is read from standard in.
               The default is to copy everything through.

          Expect reads standard input looking for one of the strings
          given as arguments.  Reading the first string causes a suc-
          cessul exit status.  Reading any of the others causes an
          exit status equal to the string.  The command also termi-
          nates on a timeout.  The options are:

          -t   set the timeout to seconds. The default is 300.

          -i   ignore case when doing the matches.

          -q   don't write to /dev/cons what is read from standard in.
               The default is to copy everything through.

          Pass copies input from /dev/cons to standard output.  It
          terminates on a newline.  The only flag is -q and means the
          same as it does for expect.

          Drain discards any input waiting on standard input.  It is
          used to sync up the stream at the start of dialing or after
          an error.

     EXAMPLE

     EXPECT(1)                                               EXPECT(1)

          The following rc script dials out through a Hayes compatible
          modem on /dev/eia1 and lets the user type in a user name and
          password before starting ppp.
          #!/bin/rc
          dev=/dev/eia1
          telno=18005551212

          fn initfn {
               dial/drain
               echo +++
               dial/at zh0
          }

          fn dialfn {
               dial/drain
               dial/at dt^$telno
          }
          {
               # set up uart
               if( test -e $dev^ctl ){
                    echo -n b^$baud
                    echo -n m1     # cts/rts flow control
                    echo -n q64000 # big buffer
                    echo -n n1     # nonblocking writes
                    echo -n r1     # rts on
                    echo -n d1     # dtr on
                    echo -n c1     # handup when we lose dcd
               } > $dev^ctl

               # get the modem's attention
               while( ! initfn )
                    sleep 1

               # dial
               while( ! dialfn )
                    sleep 30

               if( ! dial/expect -it 60 'username:' ){
                    echo can''t connect >[1=2]
                    exit connect
               }
               dial/pass
               if( ! dial/expect -it 60 'password:' ){
                    echo can''t connect >[1=2]
                    exit connect
               }
               dial/pass
               if( ! dial/expect -t 60 'ppp or telnet:' ){
                    echo can''t connect >[1=2]
                    exit connect
               }
               echo ppp

     EXPECT(1)                                               EXPECT(1)

               dial/expect -t 5 something
               echo connected >[1=2]

               # start ppp
               ip/ppp $primary -f
          } < $dev > $dev

     FILES
          /rc/bin/ipconf/* example dialer scripts for ppp

     SOURCE
          /sys/src/cmd/dial/*.c

     SEE ALSO
          ppp(8), telco(4)