byp4a55 professor6T9

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File Name : 3.A.debugging

#!/usr/bin/perl
#	This example demonstrates how to use the debugging features in 
#expect. They're reasonably straghtforward.
#
#	There are 3 basic ways you can debug a script:
#	
#	1. Log_Stdout 
#
#	By setting $Expect::Log_Stdout you control whether or not processes
#will echo to the screen or not. Having it turned on can be helpful so you
#can watch what a process is doing. Alternately, for a process that is already
#running you can do $process->log_stdout(1); which will turn on process 
#output for the process from that instant on. $process->log_stdout(0) will
#turn it off.
#	By default $Expect::Log_Stdout == 1. Initialized handles (discussed
#later) may also echo to STDOUT, but they don't do so by default. You have
#to manually tell them to echo. You wouldn't want your log file jabbering at
#you would you? Anyway, that will make sense later.
#
#	2. Exp_Internal
#
#	Setting $Exp_Internal=1 (or $process->exp_internal(1)) will output
#pattern matching information for expect() calls to STDERR. You can trap
#this by doing "perl expect_script.pl 2>debug.out" if you are using any of
#the bourne-ish shells. For people who use csh, don't. "exec bash" will take
#care of that straightaway. This is handy so program output and debugging output
#don't go to the same place.
#
#	3. Debug
#	
#	Setting $Expect::Debug = debug level(or $process->debug(debug level))
#will show other stuff, such as pids, output during interaction, and other
#miscellaneous output not covered by the above two items. In combination with
#Exp_Internal you can capture a lot of good information about what your script
#is doing. Debugging info also goes to STDERR.
#
#
#	This example will show (lots) of debugging info.

use Expect;

$Expect::Log_Stdout=1;
$Expect::Debug=3;
$Expect::Exp_Internal=1;

# lpc is a bsd printer control program.  It's included in every Unix I
# deal with.
$lpc = Expect->spawn("lpc");

$lpc->expect(30,"lpc> ") && print $lpc "stat\r";

$lpc->hard_close();

Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	root/root	0755	2022-03-29 12:17:51
..	dir	-	root/root	0755	2022-03-29 12:17:51
1.A.Intro	text/plain	2.37 KB	root/root	0644	2001-11-17 01:18:48
2.A.ftp	text/x-perl	3.01 KB	root/root	0644	2014-01-30 03:31:55
2.B.rlogin	text/x-perl	3.95 KB	root/root	0644	2014-01-30 03:31:55
3.A.debugging	text/x-perl	1.93 KB	root/root	0644	2014-01-30 03:31:55
4.A.top	text/x-perl	928 B	root/root	0644	2014-01-30 03:31:55
5.A.top	text/x-perl	1.11 KB	root/root	0644	2014-01-30 03:31:55
5.B.top	text/x-perl	2.39 KB	root/root	0644	2014-01-30 03:31:55
6.A.smtp-verify	text/plain	3.18 KB	root/root	0644	2014-01-30 03:31:55
6.B.modem-init	text/x-perl	1.79 KB	root/root	0644	2014-01-30 03:31:55
README	text/plain	644 B	root/root	0644	2002-03-13 12:40:44

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