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// pipestream.h -*- C++ -*- socket library |
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// Copyright (C) 1992,1993,1994 Gnanasekaran Swaminathan <gs4t@virginia.edu> |
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// |
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// Permission is granted to use at your own risk and distribute this software |
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// in source and binary forms provided the above copyright |
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// notice and this paragraph are preserved on all copies. |
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// This software is provided "as is" with no express or implied warranty. |
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// |
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// Version: 17Oct95 1.10 |
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#ifndef _PIPESTREAM_H |
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#define _PIPESTREAM_H |
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#include <sockstream.h> |
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class ipipestream: public isockstream { |
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protected: |
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ipipestream (): ios (0) {} |
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public: |
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ipipestream (const char* cmd); |
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~ipipestream () { delete ios::rdbuf (); ios::init (0); } |
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}; |
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class opipestream: public osockstream { |
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protected: |
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opipestream ():ios(0) {} |
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public: |
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opipestream (const char* cmd); |
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~opipestream () { delete ios::rdbuf (); ios::init (0); } |
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}; |
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class iopipestream: public iosockstream { |
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private: |
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iopipestream(const iopipestream& sp); // no defintion provided |
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iopipestream& operator = (iopipestream&); // no definition provided |
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protected: |
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int sp[2]; // socket pair |
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// childs pid if this is parent and |
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// 0 if this is child if object is created through |
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// iopipstream (sockbuf::type, int). |
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// -1 otherwise; |
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pid_t cpid; |
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iopipestream* next; // next in the chain |
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static iopipestream* head; // list to take care of by fork() |
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public: |
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iopipestream(sockbuf::type ty=sockbuf::sock_stream, int proto=0); |
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iopipestream(const char* cmd); |
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~iopipestream () { delete ios::rdbuf (); ios::init (0); } |
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pid_t pid () const { return cpid; } // returns cpid |
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static pid_t fork(); // sets cpid of all iopipestream* in the head |
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}; |
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#endif // _PIPESTREAM_H |
