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BGETH.C
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1989-08-30
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/* Copyright (c) 1989 Citadel */
/* All Rights Reserved */
/* #ident "bgeth.c 1.1 - 89/07/03" */
#include <errno.h>
#include "blkio_.h"
/*man---------------------------------------------------------------------------
NAME
bgeth - get the header from a block file
SYNOPSIS
#include <blkio.h>
int bgeth(bp, buf)
BLKFILE *bp;
void *buf;
DESCRIPTION
The bgeth function reads the header from the block file associated with
BLKFILE pointer bp. buf must point to a storage area at least as large
as the header size for bp.
bgeth will fail if one or more of the following is true:
[EINVAL] bp is not a valid block file.
[EINVAL] buf is NULL.
[BEBOUND] End of file not on block boundary.
[BEEOF] bp is empty.
[BENOPEN] bp is not open for reading.
SEE ALSO
bgetb, bgethf, bputh.
DIAGNOSTICS
Upon successful completion, a value of 0 is returned. Otherwise, a
value of -1 is returned, and errno set to indicate the error.
------------------------------------------------------------------------------*/
int bgeth(bp, buf)
BLKFILE * bp;
void * buf;
{
return bgethf(bp, (size_t)0, buf, bp->hdrsize);
}