[mpich-discuss] file open error code checking

[Wei-keng Liao]

I can see error codes EISDIR and EEXIST are checked in ad_ufs_open.c
and the corresponding MPI_ERR_BAD_FILE and MPI_ERR_FILE_EXISTS are generated.

But this update does not appear on other file systems, such as Lustre and GPFS.
PnetCDF needs an MPI-IO that can return the MPI_ERR_FILE_EXISTS class when the
MPI_MODE_EXCL mode is set and the file exist. This class will correspond to
NC_EEXIST in PnetCDF (when NC_NOCLOBBER is set in ncmpi_create and file exists).


ad_ufs_open.c

  94         else if(errno == EISDIR) {
  95             *error_code = MPIO_Err_create_code(MPI_SUCCESS,
  96                                                MPIR_ERR_RECOVERABLE, myname,
  97                                                __LINE__, MPI_ERR_BAD_FILE,
  98                                                "**filename", 0);
  99         }
 100         else if(errno == EEXIST) {
 101             *error_code = MPIO_Err_create_code(MPI_SUCCESS,
 102                                                MPIR_ERR_RECOVERABLE, myname,
 103                                                __LINE__, MPI_ERR_FILE_EXISTS,
 104                                                "**fileexist", 0);
 105 
 106         }

 
Wei-keng