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- /* Copyright (c) 1989 Citadel */
- /* All Rights Reserved */
-
- /* #ident "@(#)btclose.c 1.5 - 91/09/23" */
-
- #include <ansi.h>
-
- /* ansi headers */
- #include <errno.h>
- #ifdef AC_STRING
- #include <string.h>
- #endif
-
- /* library headers */
- #include <blkio.h>
-
- /* local headers */
- #include "btree_.h"
-
- /*man---------------------------------------------------------------------------
- NAME
- btclose - close btree
-
- SYNOPSIS
- #include <btree.h>
-
- int btclose(btp)
- btree_t *btp;
-
- DESCRIPTION
- The btclose function causes any buffered data for the named btree
- to be written out, the file unlocked, and the btree to be closed.
-
- btclose will fail if one or more of the following is true:
-
- [EINVAL] btp is not a valid btree pointer.
- [BTENOPEN] btp is not open.
-
- SEE ALSO
- btcreate, btlock, btopen, btsync.
-
- DIAGNOSTICS
- Upon successful completion, a value of 0 is returned. Otherwise,
- a value of -1 is returned, and errno set to indicate the error.
-
- ------------------------------------------------------------------------------*/
- #ifdef AC_PROTO
- int btclose(btree_t *btp)
- #else
- int btclose(btp)
- btree_t *btp;
- #endif
- {
- /* validate arguments */
- if (!bt_valid(btp)) {
- errno = EINVAL;
- return -1;
- }
-
- /* check if not open */
- if (!(btp->flags & BTOPEN)) {
- errno = BTENOPEN;
- return -1;
- }
-
- /* synchronize file with buffers and unlock file */
- if (btlock(btp, BT_UNLCK) == -1) {
- BTEPRINT;
- return -1;
- }
-
- /* free memory allocated for btree */
- bt_free(btp);
-
- /* close btree file */
- if (bclose(btp->bp) == -1) {
- BTEPRINT;
- return -1;
- }
-
- /* scrub slot in btb table then free it */
- memset(btp, 0, sizeof(*btb));
- btp->flags = 0;
-
- return 0;
- }