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- /* Copyright (c) 1989 Citadel */
- /* All Rights Reserved */
-
- /* #ident "@(#)bgetb.c 1.5 - 91/09/23" */
-
- #include <ansi.h>
-
- /* ansi headers */
- #ifdef AC_STDDEF
- #include <stddef.h>
- #endif
-
- /* local headers */
- #include "blkio_.h"
-
- /*man---------------------------------------------------------------------------
- NAME
- bgetb - get a block from a block file
-
- SYNOPSIS
- #include <blkio.h>
-
- int bgetb(bp, bn, buf)
- BLKFILE *bp;
- bpos_t bn;
- void *buf;
-
- DESCRIPTION
- The bgetb function reads block number bn from the block file
- associated with BLKFILE pointer bp. buf must point to a storage
- area at least as large as the block size for bp. Block numbering
- starts at 1.
-
- bgetb will fail if one or more of the following is true:
-
- [EINVAL] bp is not a valid BLKFILE pointer.
- [EINVAL] bn is less than 1.
- [EINVAL] buf is the NULL pointer.
- [BEEOF] There are not bn blocks in the file.
- [BENOPEN] bp is not open for reading.
-
- SEE ALSO
- bgetbf, bgeth, bputb.
-
- 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 bgetb(BLKFILE *bp, bpos_t bn, void *buf)
- #else
- int bgetb(bp, bn, buf)
- BLKFILE *bp;
- bpos_t bn;
- void *buf;
- #endif
- {
- return bgetbf(bp, bn, (size_t)0, buf, bp->blksize);
- }