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git-svn-id: file:///Users/olsen/Code/migration-svn-zu-git/logical-line-staging/clib2/trunk@14789 87f5fb63-7c3d-0410-a384-fd976d0f7a62
126 lines
3.2 KiB
C
126 lines
3.2 KiB
C
/*
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* $Id: fcntl_lseek.c,v 1.3 2005-01-02 09:07:07 obarthel Exp $
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*
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* :ts=4
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*
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* Portable ISO 'C' (1994) runtime library for the Amiga computer
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* Copyright (c) 2002-2005 by Olaf Barthel <olsen@sourcery.han.de>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* - Neither the name of Olaf Barthel nor the names of contributors
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* may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _FCNTL_HEADERS_H
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#include "fcntl_headers.h"
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#endif /* _FCNTL_HEADERS_H */
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/****************************************************************************/
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/* The following is not part of the ISO 'C' (1994) standard. */
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/****************************************************************************/
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off_t
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__lseek(int file_descriptor, off_t offset, int mode, int * error_ptr)
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{
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DECLARE_UTILITYBASE();
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struct file_hook_message message;
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off_t result = -1;
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struct fd * fd;
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ENTER();
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SHOWVALUE(file_descriptor);
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SHOWVALUE(offset);
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SHOWVALUE(mode);
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assert( UtilityBase != NULL );
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assert( error_ptr != NULL );
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assert( file_descriptor >= 0 && file_descriptor < __num_fd );
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assert( __fd[file_descriptor] != NULL );
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assert( FLAG_IS_SET(__fd[file_descriptor]->fd_Flags,FDF_IN_USE) );
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if(__check_abort_enabled)
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__check_abort();
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fd = __get_file_descriptor(file_descriptor);
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if(fd == NULL)
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{
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(*error_ptr) = EBADF;
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goto out;
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}
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if(mode < SEEK_SET || mode > SEEK_END)
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{
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SHOWMSG("seek mode is invalid");
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(*error_ptr) = EINVAL;
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goto out;
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}
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SHOWMSG("calling the hook");
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#if defined(UNIX_PATH_SEMANTICS)
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{
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message.action = file_hook_action_seek_and_extend;
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}
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#else
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{
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message.action = file_hook_action_seek;
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}
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#endif /* UNIX_PATH_SEMANTICS */
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message.position = offset;
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message.mode = mode;
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assert( fd->fd_Hook != NULL );
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CallHookPkt(fd->fd_Hook,fd,&message);
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(*error_ptr) = message.error;
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result = message.result;
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out:
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RETURN(result);
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return(result);
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}
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/****************************************************************************/
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off_t
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lseek(int file_descriptor, off_t offset, int mode)
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{
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off_t result;
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ENTER();
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result = __lseek(file_descriptor,offset,mode,&errno);
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RETURN(result);
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return(result);
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}
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