85 lines
1.9 KiB
C
85 lines
1.9 KiB
C
/****************************************************************
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* *
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* Copyright 2001, 2009 Fidelity Information Services, Inc *
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* *
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* This source code contains the intellectual property *
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* of its copyright holder(s), and is made available *
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* under a license. If you do not know the terms of *
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* the license, please stop and do not read further. *
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* *
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****************************************************************/
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/* iob_open - buffered I/O with GT.M error signaling
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Open a file in read-only mode.
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BFILE *iob_open_rd(char *path, int bufsiz)
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path: file to open
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blksiz: size of I/O block
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blkfactor: blocks to buffer for input (blocking factor)
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return value:
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File structure for use with other buffered I/O routines.
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*/
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#include "mdef.h"
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#include <errno.h>
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#include <sys/types.h>
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#include "gtm_string.h"
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#include "gtm_unistd.h"
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#include "gtm_fcntl.h"
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#include "gtm_stat.h"
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#include "iob.h"
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#ifdef __MVS__
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#include "gtm_zos_io.h"
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#endif
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BFILE *iob_open_rd(path, blksiz, blkfactor)
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char *path;
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int blksiz;
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int blkfactor;
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{
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int fd;
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BFILE *file;
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#ifdef __MVS__
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int realfiletag;
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/* Need the ERR_BADTAG and ERR_TEXT error_defs for the TAG_POLICY macro warning */
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error_def(ERR_TEXT);
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error_def(ERR_BADTAG);
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#endif
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if (FD_INVALID == (fd = OPEN3(path,O_RDONLY,0)))
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return NULL;
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#ifdef __MVS__
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if (-1 == gtm_zos_tag_to_policy(fd, TAG_BINARY, &realfiletag))
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TAG_POLICY_GTM_PUTMSG(path, realfiletag, TAG_BINARY, errno);
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#endif
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file = malloc(SIZEOF(BFILE));
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file->fd = fd;
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file->path = malloc(strlen(path) + 1);
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strcpy(file->path, path);
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file->oflag = O_RDONLY;
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file->mode = 0;
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file->blksiz = blksiz;
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file->bufsiz = blksiz * blkfactor;
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file->buf = malloc(file->bufsiz);
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file->bptr = file->buf;
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file->remaining = 0;
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file->write_mode = FALSE;
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return file;
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}
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