110 lines
2.5 KiB
C
110 lines
2.5 KiB
C
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/****************************************************************
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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_flush - buffered I/O with GT.M error signaling
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flush I/O buffer. No action is taken if the last operation was not a
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write.
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void iob_flush(BFILE *bf)
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BFILE *bf: file to flush
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Note: It is assumed that the write buffer is full. Exactly one
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record of size bf->bufsiz is written.
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*/
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#include "mdef.h"
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#include "gtm_string.h"
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#include <errno.h>
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#include "gtm_fcntl.h"
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#include "gtm_unistd.h"
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#include "gtm_stdio.h"
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#include "gtm_stat.h"
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#include "error.h"
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#include "iob.h"
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#include "gtmio.h"
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void iob_flush(BFILE *bf)
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{
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ssize_t nwritten, nrewritten;
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ssize_t nbytes;
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int rc;
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error_def(ERR_IOEOF);
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if (!bf->write_mode)
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return;
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if (bf->remaining == bf->bufsiz) /* return if nothing to write */
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return;
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if (bf->remaining) /* set remaining bytes to null */
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{
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memset(bf->bptr, 0, bf->remaining);
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/* bytes to transfer, rounded up to the nearest block */
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nbytes = (((bf->bptr - bf->buf) + bf->blksiz - 1) / bf->blksiz)
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* bf->blksiz;
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}
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else
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nbytes = bf->bufsiz;
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DOWRITERL(bf->fd, bf->buf, nbytes, nwritten);
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#ifdef DEBUG_IOB
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PRINTF("iob_flush:\t\twrite(%d, %x, %d) = %d\n",bf->fd,bf->buf,nbytes,nwritten);
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#endif
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bf->bptr = bf->buf;
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bf->remaining = bf->bufsiz;
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if (nwritten < nbytes)
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{
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CLOSEFILE_RESET(bf->fd, rc); /* resets "bf->fd" to FD_INVALID */
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#ifdef SCO
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if (nwritten == -1)
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{
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if (errno == ENXIO)
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nwritten = 0;
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else
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{
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rts_error(VARLSTCNT(1) errno);
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return;
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}
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}
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#else
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if (nwritten == -1)
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{
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rts_error(VARLSTCNT(1) errno);
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return;
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}
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#endif
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rts_error(VARLSTCNT(1) ERR_IOEOF);
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/* if we continued from here, assume that this is a magnetic
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tape and we have loaded the next volume. Re-open and
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finish the write operation.
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*/
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while (FD_INVALID == (bf->fd = OPEN3(bf->path,bf->oflag,bf->mode)))
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rts_error(VARLSTCNT(1) errno);
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DOWRITERL(bf->fd, bf->buf + nwritten, nbytes - nwritten, nrewritten);
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#ifdef DEBUG_IOB
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PRINTF("iob_flush:\t\twrite(%d, %x, %d) = %d\n", bf->fd, bf->buf, nbytes, nwritten);
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#endif
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if (nrewritten < nbytes - nwritten)
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{
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rts_error(VARLSTCNT(1) errno);
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return;
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}
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}
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}
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