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#!/usr/bin/python
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#
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# stop_test: tests the stop command
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#
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# Test the stop command for stopping a process by its pid.
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# Requires the following commands to be implemented
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# or otherwise usable:
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#
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# stop, sleep
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#
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import sys, imp, atexit
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sys.path.append("/home/courses/cs3214/software/pexpect-dpty/");
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import pexpect, shellio, signal, time, os, re, proc_check
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#Ensure the shell process is terminated
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def force_shell_termination(shell_process):
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c.close(force=True)
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#pulling in the regular expression and other definitions
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definitions_scriptname = sys.argv[1]
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def_module = imp.load_source('', definitions_scriptname)
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logfile = None
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if hasattr(def_module, 'logfile'):
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logfile = def_module.logfile
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# spawn an instance of the shell
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c = pexpect.spawn(def_module.shell, drainpty=True, logfile=logfile)
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atexit.register(force_shell_termination, shell_process=c)
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# set timeout for all following 'expect*' calls to 2 seconds
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c.timeout = 2
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# ensure that shell prints expected prompt
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assert c.expect(def_module.prompt) == 0, "Shell did not print expected prompt"
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# run a command
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c.sendline("sleep 30 &")
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# pull the jobid and pid from the background process printout
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(jobid, pid) = shellio.parse_regular_expression(c, def_module.bgjob_regex)
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# ensure that the shell prints the expected prompt
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assert c.expect(def_module.prompt) == 0, "Shell did not print expected prompt"
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#The job needs to be running when we call stop
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proc_check.count_children_timeout(c, 1, 1)
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# send the stop command to the process
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c.sendline(def_module.builtin_commands['stop'] % jobid)
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#Ensure that sleep has enough time to stop before we read its
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#/proc/ pid /stat file.
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time.sleep(.5)
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#Ensure that sleep is now stopped in the background, and is not
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#the foreground process.
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assert not proc_check.check_pid_fgpgrp(pid), \
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'Error: process is in the foreground'
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assert proc_check.check_pid_status(pid, 'T'), 'Error: process not stopped'
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#check the prompt prints
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assert c.expect(def_module.prompt) == 0, "Shell did not print expected prompt"
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c.sendline("exit");
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assert c.expect_exact("exit\r\n") == 0, "Shell output extraneous characters"
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shellio.success()
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