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openmpi/ompi/mca/fs/ufs/fs_ufs_file_open.c
Gilles Gouaillardet fe351f6801 io: do not cast way the const modifier when this is not necessary
update the io framework and mpi c bindings
2015-09-09 09:18:58 +09:00

96 строки
2.5 KiB
C

/*
* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
* University Research and Technology
* Corporation. All rights reserved.
* Copyright (c) 2004-2011 The University of Tennessee and The University
* of Tennessee Research Foundation. All rights
* reserved.
* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
* University of Stuttgart. All rights reserved.
* Copyright (c) 2004-2005 The Regents of the University of California.
* All rights reserved.
* Copyright (c) 2008-2014 University of Houston. All rights reserved.
* Copyright (c) 2015 Research Organization for Information Science
* and Technology (RIST). All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#include "ompi_config.h"
#include "fs_ufs.h"
#include <fcntl.h>
#include <sys/stat.h>
#include "mpi.h"
#include "ompi/constants.h"
#include "ompi/mca/fs/fs.h"
#include "ompi/communicator/communicator.h"
#include "ompi/info/info.h"
/*
* file_open_ufs
*
* Function: - opens a new file
* Accepts: - same arguments as MPI_File_open()
* Returns: - Success if new file handle
*/
int
mca_fs_ufs_file_open (struct ompi_communicator_t *comm,
const char* filename,
int access_mode,
struct ompi_info_t *info,
mca_io_ompio_file_t *fh)
{
int amode;
int old_mask, perm;
int rank, ret;
rank = ompi_comm_rank ( comm );
if (fh->f_perm == OMPIO_PERM_NULL) {
old_mask = umask(022);
umask(old_mask);
perm = old_mask ^ 0666;
}
else {
perm = fh->f_perm;
}
amode = 0;
if (access_mode & MPI_MODE_RDONLY)
amode = amode | O_RDONLY;
if (access_mode & MPI_MODE_WRONLY)
amode = amode | O_WRONLY;
if (access_mode & MPI_MODE_RDWR)
amode = amode | O_RDWR;
if ( 0 == rank ) {
/* MODE_CREATE and MODE_EXCL can only be set by one process */
if ( access_mode & MPI_MODE_CREATE )
amode = amode | O_CREAT;
if (access_mode & MPI_MODE_EXCL)
amode = amode | O_EXCL;
fh->fd = open (filename, amode, perm);
ret = fh->fd;
}
comm->c_coll.coll_bcast ( &ret, 1, MPI_INT, 0, comm, comm->c_coll.coll_bcast_module);
if ( -1 == ret ) {
fh->fd = ret;
return OMPI_ERROR;
}
if ( 0 != rank ) {
fh->fd = open (filename, amode, perm);
if (-1 == fh->fd) {
return OMPI_ERROR;
}
}
return OMPI_SUCCESS;
}