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/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 2004,2007 Oracle. All rights reserved.
*
* $Id: os_truncate.c,v 12.10 2007/05/17 15:15:46 bostic Exp $
*/
#include "db_config.h"
#include "db_int.h"
/*
* __os_truncate --
* Truncate the file.
*
* PUBLIC: int __os_truncate __P((DB_ENV *, DB_FH *, db_pgno_t, u_int32_t));
*/
int
__os_truncate(dbenv, fhp, pgno, pgsize)
DB_ENV *dbenv;
DB_FH *fhp;
db_pgno_t pgno;
u_int32_t pgsize;
{
off_t offset;
int ret;
/*
* Truncate a file so that "pgno" is discarded from the end of the
* file.
*/
offset = (off_t)pgsize * pgno;
if (dbenv != NULL &&
FLD_ISSET(dbenv->verbose, DB_VERB_FILEOPS | DB_VERB_FILEOPS_ALL))
__db_msg(dbenv,
"fileops: truncate %s to %lu", fhp->name, (u_long)offset);
if (DB_GLOBAL(j_ftruncate) != NULL)
ret = DB_GLOBAL(j_ftruncate)(fhp->fd, offset);
else {
#ifdef HAVE_FTRUNCATE
RETRY_CHK((ftruncate(fhp->fd, offset)), ret);
#else
ret = DB_OPNOTSUP;
#endif
}
if (ret != 0) {
__db_syserr(dbenv, ret, "ftruncate: %lu", (u_long)offset);
ret = __os_posix_err(ret);
}
return (ret);
}
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