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60 lines
1.3 KiB
C
60 lines
1.3 KiB
C
/*-
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* See the file LICENSE for redistribution information.
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*
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* Copyright (c) 1999, 2000
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* Sleepycat Software. All rights reserved.
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*/
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#include "db_config.h"
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#ifndef lint
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static const char revid[] = "$Id: os_finit.c,v 11.9 2000/03/29 20:50:52 ubell Exp $";
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#endif /* not lint */
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#include "db_int.h"
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/*
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* __os_fpinit --
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* Initialize a page in a regular file.
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*
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* PUBLIC: int __os_fpinit __P((DB_ENV *, DB_FH *, db_pgno_t, int, int));
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*/
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int
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__os_fpinit(dbenv, fhp, pgno, pagecount, pagesize)
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DB_ENV *dbenv;
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DB_FH *fhp;
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db_pgno_t pgno;
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int pagecount, pagesize;
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{
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size_t nw, totalbytes, curbytes;
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int ret;
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char buf[1024];
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/*
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* Windows/NT zero-fills pages that were never explicitly written to
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* the file. Windows 95/98 gives you random garbage, and that breaks
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* DB.
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*/
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if (__os_is_winnt())
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return (0);
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if ((ret = __os_seek(dbenv,
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fhp, pagesize, pgno, 0, 0, DB_OS_SEEK_SET)) != 0)
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return (ret);
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memset(buf, 0, sizeof(buf));
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totalbytes = pagecount * pagesize;
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while (totalbytes > 0) {
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if (totalbytes > sizeof(buf))
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curbytes = sizeof(buf);
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else
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curbytes = totalbytes;
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if ((ret = __os_write(dbenv, fhp, buf, curbytes, &nw)) != 0)
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return (ret);
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if (nw != curbytes)
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return (EIO);
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totalbytes -= curbytes;
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}
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return (0);
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}
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