60 lines
1.7 KiB
C
60 lines
1.7 KiB
C
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/*#######################################################################
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# RDOS operating system
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# Copyright (C) 1988-2006, Leif Ekblad
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#
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# This library is free software; you can redistribute it and/or modify
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# it under the terms of the GNU Lesser General Public License as published
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# by the Free Software Foundation; either version 2.1 of the License, or
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# (at your option) any later version.
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#
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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
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# GNU Lesser General Public License for more details.
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#
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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 Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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# The author of this program may be contacted at leif@rdos.net
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#
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# lseek.c
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# lseek function implementation
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#
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##########################################################################*/
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#include "config.h"
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#include <_ansi.h>
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#include <_syslist.h>
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#include <unistd.h>
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#include <errno.h>
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#include <rdos.h>
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off_t lseek(int file, off_t pos, int whence)
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{
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off_t temp;
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switch (whence)
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{
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case SEEK_CUR:
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temp = RdosGetFilePos(file);
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temp += pos;
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RdosSetFilePos(file, temp);
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return temp;
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case SEEK_SET:
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RdosSetFilePos(file, pos);
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return pos;
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case SEEK_END:
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temp = RdosGetFilePos(file);
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temp += pos;
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RdosSetFilePos(file, temp);
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return temp;
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default:
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errno = EINVAL;
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return - 1;
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}
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}
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