X-Git-Url: https://git.saurik.com/apple/security.git/blobdiff_plain/80e2389990082500d76eb566d4946be3e786c3ef..d8f41ccd20de16f8ebe2ccc84d47bf1cb2b26bbb:/libsecurity_utilities/lib/unixchild.h

diff --git a/libsecurity_utilities/lib/unixchild.h b/libsecurity_utilities/lib/unixchild.h
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--- a/libsecurity_utilities/lib/unixchild.h
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-/*
- * Copyright (c) 2004 Apple Computer, Inc. All Rights Reserved.
- * 
- * @APPLE_LICENSE_HEADER_START@
- * 
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
- * 
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
- * limitations under the License.
- * 
- * @APPLE_LICENSE_HEADER_END@
- */
-
-
-//
-// unixchild - low-level UNIX process child management
-//
-#ifndef _H_UNIXCHILD
-#define _H_UNIXCHILD
-
-#include <security_utilities/utilities.h>
-#include <security_utilities/errors.h>
-#include <security_utilities/globalizer.h>
-#include <sys/types.h>
-#include <sys/wait.h>
-#include <map>
-#include <list>
-
-
-namespace Security {
-namespace UnixPlusPlus {
-
-
-//
-// A Child object represents a (potential) fork-child of your process.
-// It could be a clean fork or a fork/exec; this layer doesn't care.
-// It is meant to track the UNIX-life of that process.
-// Subclass Child or use it as a mix-in.
-//
-// Child keeps track of all alive children; Child::find<>() can locate them
-// by pid if you like. Other children are not collected; you've got to do this
-// yourself.
-//
-class Child {
-public:
-	Child();
-	virtual ~Child();
-	
-	enum State {
-		unborn,				// never forked
-		alive,				// last seen alive
-		dead,				// coroner confirms death
-		stopped,			// stopped due to trace or job control (not implemented)
-		abandoned,			// cut loose (via forget())
-		invalid				// system says we're all confused about this child
-	};
-	
-	void fork();			// do the forky-forky
-
-	State state() const { return mState; }
-	operator bool () const { return mState == alive; }
-	pid_t pid() const { assert(mState != unborn); return mPid; }
-	
-	State check();			// update status on (just) this child and return new state
-	void wait();			// wait for (just) this Child to die
-	
-	void kill(int signal);	// send signal to child (if alive)
-	void kill();			// bring me its head, NOW
-	
-	// status is only available for dead children
-	int waitStatus() const;	// raw wait(2) status byte
-	bool succeeded() const { return waitStatus() == 0; }
-	bool bySignal() const;	// was killed by a signal
-	int exitCode() const;	// exit() code; valid only if !bySignal()
-	int exitSignal() const;	// signal that killed child; valid only if bySignal()
-	bool coreDumped() const; // child dumped core when it died
-
-protected:
-	virtual void childAction() = 0; // called in child after fork()
-	virtual void parentAction();	// called in parent after fork()
-	virtual void dying();	// called when child is confirmed dead
-	
-	void abandon();			// cut a living child loose (forget about it)
-	
-private:
-	State mState;			// child state
-	pid_t mPid;				// pid of child (if born)
-	int mStatus;			// exit status (if dead)
-	
-	bool checkStatus(int options); // check status of this Child (wait4)
-	void bury(int status);	// canonical last rites
-	static Child *findGeneric(pid_t pid); // find living child by pid
-	void tryKill(int signal);
-	
-	class Bier: public std::list<Child *> {
-	public:
-		void add(Child *child) { this->push_back(child); }
-		void notify();
-	};
-
-public:
-	// set sharedChildren(true) in library code to leave other children alone
-	static void sharedChildren(bool s);
-	static bool sharedChildren();
-	
-	void reset();			// make Child ready to be born again (forgets all state)
-
-	static void checkChildren(); // update status on living offspring
-
-	template <class Subclass>
-	static Subclass *find(pid_t pid)
-	{ return dynamic_cast<Subclass *>(findGeneric(pid)); }
-
-private:
-	struct Children : public Mutex, public std::map<pid_t, Child *> {
-		Children() : shared(false) { }
-		bool shared;
-	};
-	static ModuleNexus<Children> mChildren;
-};
-
-
-}	// end namespace UnixPlusPlus
-}	// end namespace Security
-
-#endif //_H_UNIXCHILD