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45 lines
840 B
C
45 lines
840 B
C
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/*-
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* See the file LICENSE for redistribution information.
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*
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* Copyright (c) 1997, 1998
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* Sleepycat Software. All rights reserved.
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*/
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#include "config.h"
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#ifndef lint
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static const char sccsid[] = "@(#)os_seek.c 10.9 (Sleepycat) 4/19/98";
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#endif /* not lint */
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#ifndef NO_SYSTEM_INCLUDES
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#include <sys/types.h>
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#include <errno.h>
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#include <unistd.h>
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#endif
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#include "db_int.h"
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/*
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* __os_seek --
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* Seek to a page/byte offset in the file.
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*
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* PUBLIC: int __os_seek __P((int, size_t, db_pgno_t, u_int32_t, int, int));
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*/
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int
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__os_seek(fd, pgsize, pageno, relative, isrewind, whence)
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int fd;
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size_t pgsize;
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db_pgno_t pageno;
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u_int32_t relative;
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int isrewind, whence;
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{
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off_t offset;
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offset = (off_t)pgsize * pageno + relative;
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if (isrewind)
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offset = -offset;
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return (lseek(fd, offset, whence) == -1 ? errno : 0);
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}
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