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