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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: rfopen.c,v 6.5 2002/10/09 20:57:14 brbarret Exp $
*
* Function: - opens a file using remote filed
* - server nodeid may be specified by prefixing
* filename with <nodeid>: as in 100:temp
* Accepts: - file name
* - open flags
* - mode for newly created files
* Returns: - remote file descriptor
*/
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include <events.h>
#include <freq.h>
#include <ksignal.h>
#include <net.h>
#include <portable.h>
#include <typical.h>
#include <etc_misc.h>
/*
* external variables
*/
extern struct fclient _ufd[FUMAX]; /* client file descriptor table */
/*
* external functions
*/
extern char *_fnparse(); /* parse nodeid from file name */
int
lam_rfopen(name, flags, mode)
CONST char *name;
int4 flags;
int4 mode;
{
struct nmsg nhead; /* network message desc. */
struct freq *request; /* filed request */
struct freply *reply; /* filed reply */
int mask; /* signal mask */
int fd; /* new file descriptor (ufd) */
/*
* Find slot in client fd table.
*/
for (fd = 3; (fd < FUMAX) && (_ufd[fd].fu_tflags != 0); ++fd);
if (fd >= FUMAX) {
errno = ENFILE;
return(LAMERROR);
}
/*
* Determine server node ID.
*/
name = _fnparse(name, &nhead.nh_node);
request = (struct freq *) nhead.nh_data;
reply = (struct freply *) nhead.nh_data;
request->fq_src_node = getnodeid();
request->fq_src_event = -lam_getpid();
request->fq_req = FQOPEN;
request->fq_mode = mode;
request->fq_flags = flags;
nhead.nh_event = EVFILED;
nhead.nh_type = 0;
nhead.nh_flags = 0;
nhead.nh_length = strlen(name) + 1;
if (nhead.nh_length > MAXNMSGLEN) {
errno = ENAMETOOLONG;
return(LAMERROR);
}
nhead.nh_msg = (char *) name;
mask = ksigblock(sigmask(SIGUDIE) | sigmask(SIGARREST));
if (nsend(&nhead)) {
ksigsetmask(mask);
return(LAMERROR);
}
nhead.nh_event = -lam_getpid();
nhead.nh_length = 0;
nhead.nh_msg = 0;
if (nrecv(&nhead)) {
ksigsetmask(mask);
return(LAMERROR);
}
ksigsetmask(mask);
if (reply->fr_errno != 0) {
errno = reply->fr_errno;
return(LAMERROR);
}
else {
_ufd[fd].fu_tflags = flags;
_ufd[fd].fu_node = nhead.nh_node;
_ufd[fd].fu_tfd = reply->fr_ret;
return(fd);
}
}
/*
* backwards compatibility
*/
int rfopen(name, flags, mode) CONST char *name; int4 flags, mode;
{ return(lam_rfopen(name, flags, mode)); }
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