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/****************************************************************
* *
* Copyright (c) 2001-2024 Fidelity National Information *
* Services, Inc. and/or its subsidiaries. All rights reserved. *
* *
* This source code contains the intellectual property *
* of its copyright holder(s), and is made available *
* under a license. If you do not know the terms of *
* the license, please stop and do not read further. *
* *
****************************************************************/
/* iob_open - buffered I/O with GT.M error signaling
Open a file in read-only mode.
BFILE *iob_open_rd(char *path, int bufsiz)
path: file to open
blksiz: size of I/O block
blkfactor: blocks to buffer for input (blocking factor)
return value:
File structure for use with other buffered I/O routines.
*/
#include "mdef.h"
#include <errno.h>
#include <sys/types.h>
#include "gtm_string.h"
#include "gtm_unistd.h"
#include "gtm_fcntl.h"
#include "gtm_stat.h"
#include "iob.h"
#ifdef __MVS__
#include "gtm_zos_io.h"
/* Need the ERR_BADTAG and ERR_TEXT error_defs for the TAG_POLICY macro warning */
error_def(ERR_BADTAG);
error_def(ERR_TEXT);
#endif
BFILE *iob_open_rd(char *path, int blksiz, int blkfactor)
{
int fd;
BFILE *file;
#ifdef __MVS__
int realfiletag;
#endif
if (FD_INVALID == (fd = OPEN3(path,O_RDONLY,0)))
return NULL;
#ifdef __MVS__
if (-1 == gtm_zos_tag_to_policy(fd, TAG_BINARY, &realfiletag))
TAG_POLICY_GTM_PUTMSG(path, realfiletag, TAG_BINARY, errno);
#endif
file = malloc(SIZEOF(BFILE));
file->fd = fd;
file->path = malloc(strlen(path) + 1);
strcpy(file->path, path);
file->oflag = O_RDONLY;
file->mode = 0;
file->blksiz = blksiz;
file->bufsiz = blksiz * blkfactor;
file->buf = malloc(file->bufsiz);
file->bptr = file->buf;
file->remaining = 0;
file->write_mode = FALSE;
return file;
}
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