/*D
   MPI_Info_get_string - Retrieves the value associated with a key

Synopsis:
.vb
int MPI_Info_get_string(MPI_Info info, const char *key, int *buflen,
                        char *value, int *flag)
.ve

Input Parameters:
+ info - info object (handle)
- key - key (string)

Input/Output Parameters:
. buflen - length of buffer (integer)

Output Parameters:
+ value - value (string)
- flag - true if key defined, false if not (boolean)

.N ThreadSafe

.N Fortran

.N Errors
.N MPI_SUCCESS
.N MPI_ERR_ARG
.N MPI_ERR_INFO
.N MPI_ERR_OTHER

D*/

