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/*
* Copyright (c) 2001-2002 The Trustees of Indiana University.
* All rights reserved.
* Copyright (c) 1998-2001 University of Notre Dame.
* All rights reserved.
* Copyright (c) 1994-1998 The Ohio State University.
* All rights reserved.
*
* This file is part of the LAM/MPI software package. For license
* information, see the LICENSE file in the top level directory of the
* LAM/MPI source distribution.
*
* $HEADER$
* Ohio Trollius
* Copyright 1997 The Ohio State University
* GDB
*
* $Id: rfwrite.c,v 6.6 2003/01/16 15:46:29 brbarret Exp $
*
* Function: - writes to a file using remote filed
* Accepts: - runtime file descriptor
* - buffer ptr
* - buffer length
* Returns: - 0 or ERROR
*/
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <events.h>
#include <freq.h>
#include <ksignal.h>
#include <net.h>
#include <portable.h>
#include <terror.h>
#include <typical.h>
#include <etc_misc.h>
/*
* global functions
*/
int4 lam_rfwrite();
int4 _lam_rfwrite();
/*
* external variables
*/
extern struct fclient _ufd[FUMAX]; /* client file descriptor table */
/*
* external functions
*/
extern int _fdvalid(); /* check validity of file desc */
int4
lam_rfwrite(fd, buf, len)
int fd;
CONST char *buf;
int4 len;
{
/*
* Do simple error checking.
*/
if (_fdvalid(fd)) return((int4) LAMERROR);
if ((fd <= 2) && (_ufd[fd].fu_node == NOTNODEID)) {
_ufd[fd].fu_node = getorigin();
}
return(_lam_rfwrite(_ufd[fd].fu_node, _ufd[fd].fu_tfd,
_ufd[fd].fu_tflags, buf, len));
}
int4
_lam_rfwrite(node, tfd, tflags, buf, len)
int4 node;
int4 tfd;
int4 tflags;
CONST char *buf;
int4 len;
{
struct nmsg nhead; /* network message desc. */
struct freq *request; /* filed request */
struct freply *reply; /* filed reply */
int mask; /* signal mask */
int4 tot_len = 0; /* total length written */
int4 pkt_len; /* one packet length */
request = (struct freq *) nhead.nh_data;
reply = (struct freply *) nhead.nh_data;
nhead.nh_node = node;
nhead.nh_flags = tflags & LAM_O_DMSG;
nhead.nh_msg = (char *) buf;
mask = ksigblock(sigmask(SIGUDIE) | sigmask(SIGARREST));
/*
* Packetize output buffer.
*/
do {
request->fq_src_node = getnodeid();
request->fq_src_event = -lam_getpid();
request->fq_req = FQWRITE;
request->fq_tfd = tfd;
nhead.nh_event = EVFILED;
nhead.nh_type = 0;
nhead.nh_length = (len > MAXNMSGLEN) ? MAXNMSGLEN : len;
pkt_len = nhead.nh_length;
request->fq_length = pkt_len;
if (nsend(&nhead)) {
ksigsetmask(mask);
return(LAMERROR);
}
if (! (tflags & LAM_O_1WAY)) {
nhead.nh_event = -lam_getpid();
nhead.nh_type = 0;
nhead.nh_length = 0;
if (nrecv(&nhead)) {
ksigsetmask(mask);
return(LAMERROR);
}
if (reply->fr_errno != 0) {
ksigsetmask(mask);
errno = reply->fr_errno;
return(LAMERROR);
}
else if (reply->fr_ret != pkt_len) {
len = 0;
}
else {
len -= pkt_len;
nhead.nh_msg += pkt_len;
}
} else {
reply->fr_ret = pkt_len;
len -= pkt_len;
nhead.nh_msg += pkt_len;
}
tot_len += reply->fr_ret;
} while (len > 0);
ksigsetmask(mask);
return(tot_len);
}
/*
* backwards compatibility
*/
int4 rfwrite(fd, buf, len) int fd; CONST char *buf; int4 len;
{ return(lam_rfwrite(fd, buf, len)); }
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