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/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */
/*
*
* Copyright (C) 1997 University of Chicago.
* See COPYRIGHT notice in top-level directory.
*/
#include "ad_piofs.h"
void ADIOI_PIOFS_Open(ADIO_File fd, int *error_code)
{
int amode, perm, old_mask, err;
piofs_fstat_t piofs_fstat;
char *value;
#ifndef PRINT_ERR_MSG
static char myname[] = "ADIOI_PIOFS_OPEN";
#endif
if (fd->perm == ADIO_PERM_NULL) {
old_mask = umask(022);
umask(old_mask);
perm = old_mask ^ 0666;
}
else perm = fd->perm;
amode = 0;
if (fd->access_mode & ADIO_CREATE)
amode = amode | O_CREAT;
if (fd->access_mode & ADIO_RDONLY)
amode = amode | O_RDONLY;
if (fd->access_mode & ADIO_WRONLY)
amode = amode | O_WRONLY;
if (fd->access_mode & ADIO_RDWR)
amode = amode | O_RDWR;
if (fd->access_mode & ADIO_EXCL)
amode = amode | O_EXCL;
fd->fd_sys = open(fd->filename, amode, perm);
fd->fd_direct = -1;
llseek(fd->fd_sys, 0, SEEK_SET);
/* required to initiate use of 64-bit offset */
if (fd->fd_sys != -1) {
value = (char *) ADIOI_Malloc((MPI_MAX_INFO_VAL+1)*sizeof(char));
/* get file striping information and set it in info */
err = piofsioctl(fd->fd_sys, PIOFS_FSTAT, &piofs_fstat);
if (!err) {
ADIOI_Snprintf(value, MPI_MAX_INFO_VAL+1, "%d", piofs_fstat.st_bsu);
ADIOI_Info_set(fd->info, "striping_unit", value);
ADIOI_Snprintf(value, MPI_MAX_INFO_VAL+1, "%d", piofs_fstat.st_cells);
ADIOI_Info_set(fd->info, "striping_factor", value);
ADIOI_Snprintf(value, MPI_MAX_INFO_VAL+1, "%d", piofs_fstat.st_base_node);
ADIOI_Info_set(fd->info, "start_iodevice", value);
}
ADIOI_Free(value);
if (fd->access_mode & ADIO_APPEND)
fd->fp_ind = fd->fp_sys_posn = llseek(fd->fd_sys, 0, SEEK_END);
}
if (fd->fd_sys == -1) {
#ifdef MPICH
*error_code = MPIR_Err_create_code(MPI_SUCCESS, MPIR_ERR_RECOVERABLE, myname, __LINE__, MPI_ERR_IO, "**io",
"**io %s", strerror(errno));
#elif defined(PRINT_ERR_MSG)
*error_code = MPI_ERR_UNKNOWN;
#else /* MPICH-1 */
*error_code = MPIR_Err_setmsg(MPI_ERR_IO, MPIR_ADIO_ERROR,
myname, "I/O Error", "%s", strerror(errno));
ADIOI_Error(ADIO_FILE_NULL, *error_code, myname);
#endif
}
else *error_code = MPI_SUCCESS;
}
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