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libs/ck-libs/ampi/romio/adio/ad_nfs/ad_nfs_open.c

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/* -*- Mode: C; c-basic-offset:4 ; -*- */
/* 
 *
 *   Copyright (C) 1997 University of Chicago. 
 *   See COPYRIGHT notice in top-level directory.
 */

#include "ad_nfs.h"

void ADIOI_NFS_Open(ADIO_File fd, int *error_code)
{
    int perm, amode;
    mode_t old_mask;
    static char myname[] = "ADIOI_NFS_OPEN";

    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;

#ifdef ADIOI_MPE_LOGGING
    MPE_Log_event( ADIOI_MPE_open_a, 0, NULL );
#endif
    fd->fd_sys = open(fd->filename, amode, perm);
#ifdef ADIOI_MPE_LOGGING
    MPE_Log_event( ADIOI_MPE_open_b, 0, NULL );
#endif
    fd->fd_direct = -1;

    if ((fd->fd_sys != -1) && (fd->access_mode & ADIO_APPEND)) {
#ifdef ADIOI_MPE_LOGGING
        MPE_Log_event( ADIOI_MPE_lseek_a, 0, NULL );
#endif
        fd->fp_ind = fd->fp_sys_posn = lseek(fd->fd_sys, 0, SEEK_END);
#ifdef ADIOI_MPE_LOGGING
        MPE_Log_event( ADIOI_MPE_lseek_b, 0, NULL );
#endif
    }

    if (fd->fd_sys == -1) {
    /* Check for special error codes for those MPI error 
       classes that relate to particular problems */
    if (errno == ENAMETOOLONG)
        *error_code = MPIO_Err_create_code(MPI_SUCCESS,
                           MPIR_ERR_RECOVERABLE, myname,
                           __LINE__, MPI_ERR_BAD_FILE,
                           "**filenamelong",
                           "**filenamelong %s %d",
                           fd->filename,
                           strlen(fd->filename));
    else if (errno == ENOENT)
        *error_code = MPIO_Err_create_code(MPI_SUCCESS,
                           MPIR_ERR_RECOVERABLE, myname,
                           __LINE__, MPI_ERR_NO_SUCH_FILE,
                           "**filenoexist",
                           "**filenoexist %s",
                           fd->filename);
    else if (errno == ENOTDIR || errno == ELOOP)
        *error_code = MPIO_Err_create_code(MPI_SUCCESS,
                           MPIR_ERR_RECOVERABLE, myname,
                           __LINE__, MPI_ERR_BAD_FILE,
                           "**filenamedir",
                           "**filenamedir %s",
                           fd->filename);
    else if (errno == EACCES) {
        *error_code = MPIO_Err_create_code(MPI_SUCCESS,
                           MPIR_ERR_RECOVERABLE, myname,
                           __LINE__, MPI_ERR_ACCESS,
                           "**fileaccess",
                           "**fileaccess %s", 
                           fd->filename);
    }
    else if (errno == EROFS) {
        /* Read only file or file system and write access requested */
        *error_code = MPIO_Err_create_code(MPI_SUCCESS,
                           MPIR_ERR_RECOVERABLE, myname,
                           __LINE__, MPI_ERR_READ_ONLY,
                           "**ioneedrd", 0);
    }
    else {
        *error_code = MPIO_Err_create_code(MPI_SUCCESS,
                           MPIR_ERR_RECOVERABLE, myname,
                           __LINE__, MPI_ERR_IO, "**io",
                           "**io %s", strerror(errno));
    }
    }
    else *error_code = MPI_SUCCESS;
}

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