author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Wed, 13 Oct 2010 16:27:53 +0300 | |
branch | RCL_3 |
changeset 75 | 254b651f304e |
parent 0 | e4d67989cc36 |
permissions | -rw-r--r-- |
0
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// Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies). |
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// All rights reserved. |
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// This component and the accompanying materials are made available |
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// under the terms of "Eclipse Public License v1.0" |
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// which accompanies this distribution, and is available |
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// at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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// |
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// Initial Contributors: |
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// Nokia Corporation - initial contribution. |
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// |
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// Contributors: |
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// |
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// Description: |
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// Name : ftruncate.cpp |
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// Part of : LIBC |
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// Contains the source for fchdir |
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// Version : 1.0 |
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// |
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#include <unistd.h> |
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#include <sys/types.h> |
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#include <sys/stat.h> |
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#include <errno.h> |
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#include <fcntl.h> |
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#include "reent.h" |
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#include "sysif.h" |
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|
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extern "C" { |
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|
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/* |
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The reentrant version for ftruncate function. |
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*/ |
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int _truncate_r(struct _reent *r, int fd, off_t len) |
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{ |
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struct stat st; |
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|
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if(fstat(fd,&st) != 0) |
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{ |
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r->_errno = EINVAL; //KErrArgument |
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return -1; |
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} |
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else |
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{ |
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if (!(S_ISREG(st.st_mode))) |
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{ |
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r->_errno = EBADF; //KErrBadHandle |
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return -1; |
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} |
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} |
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|
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return Backend()->Truncate( fd, len, r->_errno); |
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} |
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|
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/* |
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Truncates the given file (using file descriptor) to the length specified. |
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Calls the reentrant version. |
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The ftruncate() function shall cause the size of the file to be truncated |
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to length arument. If the size of the file previously exceeded length, the |
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extra data shall no longer be available to reads on the file. If the file |
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previously was smaller than this size, ftruncate() shall either increase |
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the size of the file or fail. Upon successful completion, ftruncate() shall |
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return 0; otherwise, -1 shall be returned and errno set to indicate the error. |
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*/ |
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EXPORT_C int ftruncate(int filedesc, off_t length) |
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{ |
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return _truncate_r(_REENT, filedesc, length); |
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} |
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|
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/* |
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Truncates the given file (using file name) to the length specified. |
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Calls the reentrant version. |
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The truncate() function shall cause the size of the file to be truncated |
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to length arument. If the size of the file previously exceeded length, the |
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extra data shall no longer be available to reads on the file. If the file |
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previously was smaller than this size, truncate() shall either increase |
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the size of the file or fail. Upon successful completion, truncate() shall |
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return 0; otherwise, -1 shall be returned and errno set to indicate the error. |
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*/ |
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EXPORT_C int truncate(const char *file , off_t length) |
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{ |
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int fd = 0; |
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int retval = 0; |
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int errVal = 0; |
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|
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if((fd = open(file , O_WRONLY)) < 0) |
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{ |
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return -1; |
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} |
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retval = ftruncate(fd , length); |
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if(retval < 0) |
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{ |
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errVal = errno; //Store the error value |
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close(fd) ; |
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errno = errVal; |
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return retval; |
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} |
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|
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close(fd); |
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return retval; |
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} |
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|
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} //extern "C" |