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git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@25482 72102866-910b-0410-8b05-ffd578937521
127 lines
3.1 KiB
Objective-C
127 lines
3.1 KiB
Objective-C
/** Implementation for NSPipe for GNUStep
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Copyright (C) 1997 Free Software Foundation, Inc.
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Written by: Richard Frith-Macdonald <richard@brainstorm.co.uk>
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Date: 1997
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This file is part of the GNUstep Base Library.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 3 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free
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Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02111 USA.
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$Date$ $Revision$
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*/
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#include "config.h"
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#include "GNUstepBase/preface.h"
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#include "Foundation/NSObject.h"
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#include "Foundation/NSFileHandle.h"
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#include "Foundation/NSDebug.h"
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#include "GSPrivate.h"
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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/**
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* <p>The NSPipe provides an encapsulation of the UNIX concept of pipe.<br />
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* With NSPipe, it is possible to redirect the standard input or
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* standard output.
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* </p>
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* <p>The file handles created by NSPipe are automatically closed when they
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* are no longer in use (ie when the NSPipe instance is deallocated), so you
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* don't need to close them explicitly.
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* </p>
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*/
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@implementation NSPipe
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/**
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* Returns a newly allocated and initialized NSPipe object that has been
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* sent an autorelease message.
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*/
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+ (id) pipe
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{
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return AUTORELEASE([[self alloc] init]);
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}
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- (void) dealloc
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{
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RELEASE(readHandle);
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RELEASE(writeHandle);
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[super dealloc];
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}
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- (id) init
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{
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self = [super init];
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if (self != nil)
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{
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#ifndef __MINGW32__
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int p[2];
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if (pipe(p) == 0)
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{
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readHandle = [[NSFileHandle alloc] initWithFileDescriptor: p[0]
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closeOnDealloc: YES];
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writeHandle = [[NSFileHandle alloc] initWithFileDescriptor: p[1]
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closeOnDealloc: YES];
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}
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else
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{
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NSLog(@"Failed to create pipe ... %@", [NSError _last]);
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DESTROY(self);
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}
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#else
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SECURITY_ATTRIBUTES saAttr;
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HANDLE readh, writeh;
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saAttr.nLength = sizeof(SECURITY_ATTRIBUTES);
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saAttr.bInheritHandle = TRUE;
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saAttr.lpSecurityDescriptor = NULL;
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if (CreatePipe(&readh, &writeh, &saAttr, 0) != 0)
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{
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readHandle = [[NSFileHandle alloc] initWithNativeHandle: readh
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closeOnDealloc: YES];
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writeHandle = [[NSFileHandle alloc] initWithNativeHandle: writeh
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closeOnDealloc: YES];
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}
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else
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{
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NSLog(@"Failed to create pipe ... %@", [NSError _last]);
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DESTROY(self);
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}
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#endif
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}
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return self;
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}
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/**
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* Returns the file handle for reading from the pipe.
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*/
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- (NSFileHandle*) fileHandleForReading
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{
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return readHandle;
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}
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/**
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* Returns the file handle for writing to the pipe.
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*/
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- (NSFileHandle*) fileHandleForWriting
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{
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return writeHandle;
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}
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@end
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