68 lines
2.2 KiB
Python
68 lines
2.2 KiB
Python
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"""mpwsystem -
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A simple example of how to use Apple Events to implement a "system()"
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call that invokes ToolServer on the command.
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Contributed by Daniel Brotsky <dev@brotsky.com>.
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(renamed from aesystem to mpwsystem by Jack)
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system(cmd, infile = None, outfile = None, errfile = None)
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1. Every call to system sets "lastStatus" and "lastOutput" to the
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status and output
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produced by the command when executed in ToolServer. (lastParameters
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and lastAttributes
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are set to the values of the AppleEvent result.)
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2. system returns lastStatus unless the command result indicates a MacOS error,
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in which case os.Error is raised with the errnum as associated value.
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3. You can specify ToolServer-understandable pathnames for
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redirection of input,
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output, and error streams. By default, input is Dev:Null, output is captured
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and returned to the caller, diagnostics are captured and returned to
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the caller.
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(There's a 64K limit to how much can be captured and returned this way.)"""
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import os
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import aetools
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try: server
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except NameError: server = aetools.TalkTo("MPSX", 1)
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lastStatus = None
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lastOutput = None
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lastErrorOutput = None
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lastScript = None
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lastEvent = None
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lastReply = None
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lastParameters = None
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lastAttributes = None
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def system(cmd, infile = None, outfile = None, errfile = None):
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global lastStatus, lastOutput, lastErrorOutput
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global lastScript, lastEvent, lastReply, lastParameters, lastAttributes
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cmdline = cmd
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if infile: cmdline += " <" + infile
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if outfile: cmdline += " >" + outfile
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if errfile: cmdline += " " + str(chr(179)) + errfile
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lastScript = "set Exit 0\r" + cmdline + "\rexit {Status}"
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lastEvent = server.newevent("misc", "dosc", {"----" : lastScript})
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(lastReply, lastParameters, lastAttributes) = server.sendevent(lastEvent)
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if lastParameters.has_key('stat'): lastStatus = lastParameters['stat']
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else: lastStatus = None
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if lastParameters.has_key('----'): lastOutput = lastParameters['----']
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else: lastOutput = None
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if lastParameters.has_key('diag'): lastErrorOutput = lastParameters['diag']
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else: lastErrorOutput = None
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if lastParameters['errn'] != 0:
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raise os.Error, lastParameters['errn']
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return lastStatus
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if __name__ == '__main__':
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sts = system('alert "Hello World"')
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print 'system returned', sts
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