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DasherG Mini Expect Scripts

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Stephen Merrony edited this page May 12, 2019 · 5 revisions

DasherG supports a limited subset of the Expect scripting language for automating certain types of task on the system to which the terminal emulator is connected.

Only the following commands are implemented...

  • # the line is treated as a comment, must be 1st character on line
  • expect "literal-string" swallow all responses from the host until "literal-string" is recieved
  • send "literal-string" send the "literal-string" to the host, \n is sent as a DG newline
  • exit signals the end of the script, interaction is returned to the operator (end of script has the same effect)

N.B. The spawn command is not implemented; it is assumed that you are connected to a host before you launch the mini-Expect script.

Literal strings must be enclosed in double-quotes (") which are not sent to or expected from the host.

Variables, timeouts, conditions, escape characters (other than \n), and all other Expect features not listed above are not supported.

BEWARE - this version of Expect is infinitely patient; if you make a mistake in your script, or the host does not respond as expected DasherG will hang and need to be terminated. When writing scripts the -tracescript option to DasherG is your best friend!

Sample Script

The following script automates the formatting of a disk...

# Mini-Expect script for DasherG that formats DPF0 and runs 1 test pattern on it.
# It is assumed that the host is connected and running TBOOT and we are
# at the tape "file number" prompt.
send "2\n"
expect "NEW LINE)? "
send "F\n"
expect "name? "
send "DPF0\n"
expect "27] ? "
send "\n"
expect "name? "
send "\n"
expect "area? [Y]  "
send "\n"
expect "23420]  "
send "\n"
expect "[] "
send "DPF0ID\n"
expect "characters)? [] "
send "DPF0NAME\n"
expect "15 characters)? "
send "+\n"
expect "LINE)? "
send "RE\n"
expect "15 characters)? "
send "\n"
expect "analysis? [N] "
send "Y\n"
expect "number? "
send "1\n"
expect "number? "
send "\n"
expect "like to run? "
send "1\n"
# the analysis takes some time...
expect "done): "
send "\n"
expect "410632] "
send "\n"
expect "620] "
send "\n"
expect "410763] "
send "\n"
expect "176] "
send "\n"
expect "174] "
send "\n"
exit
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