59 lines
1.6 KiB
C
59 lines
1.6 KiB
C
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/****************************************************************
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* *
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* Copyright 2001, 2007 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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#include "mdef.h"
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#include <unistd.h>
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#include <signal.h>
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#include <errno.h>
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#include "gtm_stdio.h"
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#include "do_write.h"
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#define MAX_WRITE_RETRY 2
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GBLREF sigset_t blockalrm;
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int4 do_write (int4 fdesc, off_t fptr, sm_uc_ptr_t fbuff, size_t fbuff_len)
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{
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sigset_t savemask;
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int4 save_errno, retry_count;
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ssize_t status;
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/* Block SIGALRM signal - no timers can pop and give us trouble */
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sigprocmask(SIG_BLOCK, &blockalrm, &savemask);
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save_errno = 0;
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retry_count = MAX_WRITE_RETRY;
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/*
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* The check below for EINTR need not be converted into an EINTR
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* wrapper macro since there are other conditions and a retry
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* count.
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*/
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do
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{
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if (-1 != lseek(fdesc, fptr, SEEK_SET))
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status = write(fdesc, fbuff, fbuff_len);
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else
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status = -1;
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} while (((-1 == status && EINTR == errno) || (status != fbuff_len)) && 0 < retry_count--);
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if (-1 == status) /* Had legitimate error - return it */
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save_errno = errno;
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else if (status != fbuff_len)
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save_errno = -1; /* Something kept us from getting what we wanted */
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/* Reset signal handlers */
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sigprocmask(SIG_SETMASK, &savemask, NULL);
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return save_errno;
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}
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