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12890
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"{ Package: 'stx:libbasic' }"
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19286
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"{ NameSpace: Smalltalk }"
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12890
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Object subclass:#OSProcess
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instanceVariableNames:'pid parentPid command environment directory inStream outStream
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errorStream auxStream showWindow lineWise exitStatus finishSema
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shufflerProcesses terminateLock shuffleRest'
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12890
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classVariableNames:''
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poolDictionaries:''
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category:'System-Support'
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!
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!OSProcess class methodsFor:'documentation'!
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documentation
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"
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OSProcess is an abstract class. Instances represent operating system processes
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(as opposed to Smalltalk processes).
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[author:]
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Stefan Vogel (stefan@zwerg)
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[instance variables:]
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pid SmallInteger the process id
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parentPid SmallInteger the process id of the parent process
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commandLine String the command line of the running command.
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[class variables:]
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[see also:]
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Process
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"
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!
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examples
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"
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|outStream|
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outStream := '' writeStream.
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self new
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command:'dir';
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inStream:'abc' readStream;
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outStream:outStream;
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lineWise:true;
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execute.
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outStream contents
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"
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! !
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!OSProcess class methodsFor:'instance creation'!
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new
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"return an initialized instance"
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^ self basicNew initialize.
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! !
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!OSProcess class methodsFor:'initialize'!
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initialize
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"Backward compatibility"
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Win32Process := self.
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! !
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!OSProcess class methodsFor:'private shuffling'!
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shuffleAllFrom:anInStream to:anOutStream lineWise:lineWise lockWith:aLock
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lineWise ifFalse:[
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^ anInStream copyToEndInto:anOutStream.
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].
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[anInStream atEnd] whileFalse:[
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aLock critical:[
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self
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shuffleFrom:anInStream
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to:anOutStream
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lineWise:lineWise
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]
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]
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!
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shuffleFrom:anInStream to:anOutStream lineWise:lineWise
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"copy data from anInStream to anOutStream.
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Caller makes sure, than anInStream does not block.
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anOutstream should have been set to non-blocking-mode"
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lineWise ifTrue:[
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|data|
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data := anInStream nextLine.
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data notNil ifTrue:[
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anOutStream nextPutLine:data
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] .
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] ifFalse:[
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anInStream copyToEndInto:anOutStream.
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].
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!
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shuffleRestFrom:anInStream to:anOutStream lineWise:lineWise
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[anInStream atEnd] whileFalse:[
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self
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shuffleFrom:anInStream
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to:anOutStream
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lineWise:lineWise.
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].
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! !
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!OSProcess methodsFor:'accessing'!
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accessor
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^ self
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!
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auxStream
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^ auxStream
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!
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auxStream:something
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auxStream := something.
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!
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command
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"return the value of the instance variable 'command' (automatically generated)"
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^ command
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"Created: / 10.11.1998 / 21:27:07 / cg"
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!
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command:something
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"set the value of the instance variable 'command' (automatically generated)"
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command := something.
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"Created: / 10.11.1998 / 21:27:07 / cg"
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!
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directory
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"return the value of the instance variable 'directory' (automatically generated)"
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^ directory
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"Created: / 10.11.1998 / 21:21:52 / cg"
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!
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directory:something
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"set the value of the instance variable 'directory' (automatically generated)"
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directory := something.
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"Created: / 10.11.1998 / 21:21:52 / cg"
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!
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environment
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"return the value of the instance variable 'environment' (automatically generated)"
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^ environment
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"Created: / 10.11.1998 / 21:26:34 / cg"
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!
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environment:something
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"set the value of the instance variable 'environment' (automatically generated)"
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environment := something.
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"Created: / 10.11.1998 / 21:27:07 / cg"
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!
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errorStream
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"return the value of the instance variable 'errorStream' (automatically generated)"
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^ errorStream
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"Created: / 10.11.1998 / 21:26:34 / cg"
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12890
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!
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21172
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errorStream:something
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"set the value of the instance variable 'errorStream' (automatically generated)"
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errorStream := something.
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"Created: / 10.11.1998 / 21:26:34 / cg"
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!
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exitStatus
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"return the value of the instance variable 'exitStatus' (automatically generated)"
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^ exitStatus
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"Created: / 10.11.1998 / 21:24:55 / cg"
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!
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exitStatus:something
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"set the value of the instance variable 'exitStatus' (automatically generated)"
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exitStatus := something.
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"Created: / 10.11.1998 / 21:24:55 / cg"
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!
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finishSema
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"return the value of the instance variable 'finishSema' (automatically generated)"
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^ finishSema
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"Created: / 10.11.1998 / 21:21:53 / cg"
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!
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finishSema:something
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"set the value of the instance variable 'finishSema' (automatically generated)"
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finishSema := something.
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"Created: / 10.11.1998 / 21:21:53 / cg"
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!
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inStream
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"return the value of the instance variable 'inStream' (automatically generated)"
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^ inStream
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"Created: / 10.11.1998 / 21:26:34 / cg"
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!
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inStream:something
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"set the value of the instance variable 'inStream' (automatically generated)"
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inStream := something.
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"Created: / 10.11.1998 / 21:26:34 / cg"
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!
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lineWise
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^ lineWise
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!
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lineWise:something
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lineWise := something.
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!
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outStream
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"return the value of the instance variable 'outStream' (automatically generated)"
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^ outStream
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"Created: / 10.11.1998 / 21:26:34 / cg"
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!
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outStream:something
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"set the value of the instance variable 'outStream' (automatically generated)"
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outStream := something.
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"Created: / 10.11.1998 / 21:26:34 / cg"
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12890
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!
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parentPid
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^ parentPid
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!
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parentPid:something
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parentPid := something.
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!
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pid
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^ pid
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!
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pid:something
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pid := something.
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21181
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!
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showWindow
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^ showWindow
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!
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showWindow:something
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showWindow := something.
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12890
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! !
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19298
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!OSProcess methodsFor:'file queries'!
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isExecutable:aPathName
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^ aPathName asFilename isExecutable
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! !
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19286
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21181
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!OSProcess methodsFor:'initialization'!
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initialize
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"Invoked when a new instance is created."
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showWindow := false. "/ for backward compatibility
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lineWise := true.
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! !
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13313
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!OSProcess methodsFor:'printing'!
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printOn:aStream
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aStream
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nextPutAll:self className;
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nextPut:$(.
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pid printOn:aStream.
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aStream space.
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21172
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command printOn:aStream.
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13313
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aStream nextPut:$)
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! !
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21181
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!OSProcess methodsFor:'private'!
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setupShufflerForInput:aStream
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|pipe externalStream shuffledStream shufflerProcess|
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(aStream isNil or:[aStream isExternalStream]) ifTrue:[
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^ aStream.
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].
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pipe := NonPositionableExternalStream makePipe.
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externalStream := pipe at:1.
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shuffledStream := pipe at:2.
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lineWise ifFalse:[
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shuffledStream blocking:false.
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].
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aStream isBinary ifTrue:[
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shuffledStream binary.
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].
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330 |
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"/ start a reader process, shuffling data from the given
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"/ inStream to the pipe (which is connected to the commands input)
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shufflerProcess :=
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[
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[
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[aStream atEnd] whileFalse:[
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self class shuffleFrom:aStream to:shuffledStream lineWise:lineWise.
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shuffledStream flush
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]
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] ensure:[
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shuffledStream close.
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externalStream close.
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]
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] newProcess
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name:'OSProcess input shuffler';
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"/ beSystemProcess;
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resume.
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348 |
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shufflerProcesses add:shufflerProcess.
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^ externalStream
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!
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setupShufflerForOutput:aStream
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|pipe externalStream shuffledStream shufflerProcess|
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(aStream isNil or:[aStream isExternalStream]) ifTrue:[
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^ aStream.
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].
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pipe := NonPositionableExternalStream makePipe.
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externalStream := pipe at:2.
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shuffledStream := pipe at:1.
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aStream isBinary ifTrue:[
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shuffledStream binary.
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].
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366 |
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shufflerProcess :=
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[
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WriteError handle:[:ex |
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"/ ignored
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] do:[
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372 |
[
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self class shuffleAllFrom:shuffledStream to:aStream lineWise:lineWise lockWith:terminateLock.
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] ensure:[
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externalStream close.
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shuffleRest ifTrue:[
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self class shuffleRestFrom:shuffledStream to:aStream lineWise:lineWise
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].
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379 |
].
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].
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381 |
] newProcess
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382 |
priority:(Processor userSchedulingPriority "+ 1");
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383 |
name:'OSProcess output shuffler';
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"/ beSystemProcess;
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resume.
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386 |
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shufflerProcesses add:shufflerProcess.
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^ externalStream
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389 |
! !
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390 |
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12890
|
391 |
!OSProcess methodsFor:'queries'!
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392 |
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393 |
getProcessHandle
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394 |
"some OperatingSystems redefine this to resolve this to a processHandle
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395 |
(which must be explicitely freed later).
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396 |
Others simply return the pid here"
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397 |
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21181
|
398 |
^ pid
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12890
|
399 |
!
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400 |
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401 |
isAlive
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402 |
"answer true, if the process is still alive"
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403 |
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21181
|
404 |
^ pid notNil and:[exitStatus notNil]
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12890
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405 |
!
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406 |
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407 |
isDead
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408 |
"answer true, if the process is no longer alive"
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409 |
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410 |
^ self isAlive not
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411 |
! !
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412 |
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21172
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413 |
!OSProcess methodsFor:'starting'!
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414 |
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21181
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415 |
execute
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416 |
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417 |
|nullStream|
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418 |
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|
419 |
terminateLock := Semaphore forMutualExclusion.
|
|
|
420 |
shufflerProcesses := OrderedCollection new.
|
|
|
421 |
shuffleRest := false.
|
|
|
422 |
|
|
|
423 |
inStream := self setupShufflerForInput:inStream.
|
|
|
424 |
auxStream := self setupShufflerForInput:auxStream.
|
|
|
425 |
outStream := self setupShufflerForOutput:outStream.
|
|
|
426 |
errorStream := self setupShufflerForOutput:errorStream.
|
|
|
427 |
|
|
|
428 |
[
|
|
|
429 |
inStream isNil ifTrue:[
|
|
|
430 |
inStream := nullStream := Filename nullDevice readWriteStream.
|
|
|
431 |
].
|
|
|
432 |
outStream isNil ifTrue:[
|
|
|
433 |
nullStream isNil ifTrue:[nullStream := Filename nullDevice writeStream].
|
|
|
434 |
outStream := nullStream.
|
|
|
435 |
].
|
|
|
436 |
errorStream isNil ifTrue:[
|
|
|
437 |
errorStream := outStream
|
|
|
438 |
].
|
|
|
439 |
self startProcess ifTrue:[
|
|
|
440 |
finishSema wait.
|
|
|
441 |
shuffleRest := true.
|
|
|
442 |
].
|
|
|
443 |
] ensure:[
|
|
|
444 |
(shuffleRest not and:[pid notNil]) ifTrue:[
|
|
|
445 |
"/ we were interrupted -
|
|
|
446 |
"/ terminate the os-command (and all of its forked commands)
|
|
|
447 |
self terminateGroup; terminate.
|
|
|
448 |
OperatingSystem closePid:pid.
|
|
|
449 |
].
|
|
|
450 |
shufflerProcesses do:[:eachProcess|
|
|
|
451 |
terminateLock critical:[eachProcess terminate].
|
|
|
452 |
eachProcess waitUntilTerminated
|
|
|
453 |
].
|
|
|
454 |
shufflerProcesses := nil.
|
|
|
455 |
nullStream notNil ifTrue:[
|
|
|
456 |
nullStream close.
|
|
|
457 |
].
|
|
|
458 |
].
|
|
|
459 |
|
|
|
460 |
(exitStatus isNil or:[exitStatus success]) ifFalse:[
|
|
|
461 |
^ false
|
|
|
462 |
].
|
|
|
463 |
^ true
|
|
|
464 |
!
|
|
|
465 |
|
|
21172
|
466 |
startProcess
|
|
|
467 |
finishSema := Semaphore new.
|
|
|
468 |
|
|
|
469 |
Processor
|
|
|
470 |
monitor:[
|
|
|
471 |
pid := OperatingSystem
|
|
|
472 |
startProcess:command
|
|
|
473 |
inputFrom:inStream
|
|
|
474 |
outputTo:outStream
|
|
|
475 |
errorTo:errorStream
|
|
21181
|
476 |
auxFrom:auxStream
|
|
|
477 |
environment:environment
|
|
21172
|
478 |
inDirectory:directory
|
|
21181
|
479 |
showWindow:showWindow.
|
|
21172
|
480 |
]
|
|
|
481 |
action:[:status |
|
|
|
482 |
status stillAlive ifFalse:[
|
|
|
483 |
exitStatus := status.
|
|
|
484 |
pid notNil ifTrue:[
|
|
21181
|
485 |
self kill; killGroup. "/ paranoia? - yes!!
|
|
21172
|
486 |
OperatingSystem closePid:pid.
|
|
|
487 |
].
|
|
|
488 |
finishSema signal
|
|
|
489 |
].
|
|
|
490 |
].
|
|
|
491 |
|
|
|
492 |
pid isNil ifTrue:[
|
|
|
493 |
exitStatus := OperatingSystem osProcessStatusClass processCreationFailure.
|
|
|
494 |
^ false
|
|
|
495 |
].
|
|
|
496 |
|
|
|
497 |
^ true.
|
|
|
498 |
|
|
|
499 |
"Created: / 10.11.1998 / 21:23:50 / cg"
|
|
|
500 |
"Modified: / 10.11.1998 / 21:33:16 / cg"
|
|
|
501 |
! !
|
|
|
502 |
|
|
12890
|
503 |
!OSProcess methodsFor:'terminating'!
|
|
|
504 |
|
|
|
505 |
kill
|
|
|
506 |
"kill the process - the process does not get the chance to clean up"
|
|
|
507 |
|
|
21181
|
508 |
OperatingSystem killProcess:pid.
|
|
12890
|
509 |
!
|
|
|
510 |
|
|
|
511 |
killGroup
|
|
20379
|
512 |
"kill the processGroup - the processes do not get the chance to clean up"
|
|
|
513 |
|
|
21181
|
514 |
OperatingSystem killProcessGroup:pid.
|
|
12890
|
515 |
!
|
|
|
516 |
|
|
|
517 |
killWithAllChildren
|
|
|
518 |
"terminate gracefully the process with all of its child processes"
|
|
|
519 |
|
|
|
520 |
^ self subclassResponsibility.
|
|
|
521 |
!
|
|
|
522 |
|
|
|
523 |
terminate
|
|
|
524 |
"terminate the process gracefully"
|
|
|
525 |
|
|
21181
|
526 |
OperatingSystem terminateProcess:pid.
|
|
12890
|
527 |
!
|
|
|
528 |
|
|
|
529 |
terminateGroup
|
|
|
530 |
"terminate the process group.
|
|
|
531 |
Under Windows, these is the same as terminateWithhAllChildren,
|
|
|
532 |
under unix, this terminates a subset of all children"
|
|
|
533 |
|
|
21181
|
534 |
OperatingSystem terminateProcessGroup:pid.
|
|
12890
|
535 |
!
|
|
|
536 |
|
|
|
537 |
terminateWithAllChildren
|
|
|
538 |
"terminate gracefully the process with all of its child processes"
|
|
|
539 |
|
|
|
540 |
^ self subclassResponsibility.
|
|
|
541 |
! !
|
|
|
542 |
|
|
|
543 |
!OSProcess class methodsFor:'documentation'!
|
|
|
544 |
|
|
19298
|
545 |
version
|
|
|
546 |
^ '$Header$'
|
|
|
547 |
!
|
|
|
548 |
|
|
12890
|
549 |
version_CVS
|
|
19286
|
550 |
^ '$Header$'
|
|
12890
|
551 |
! !
|
|
19286
|
552 |
|
|
21172
|
553 |
|
|
|
554 |
OSProcess initialize!
|