Signature:

  SUBROUTINE h5oget_comment_by_name_f(loc_id, name,    &
        comment, hdferr, bufsize, lapl_id)
    IMPLICIT NONE
    INTEGER(HID_T)  , INTENT(IN)            :: loc_id
    CHARACTER(LEN=*), INTENT(IN)            :: name
    CHARACTER(LEN=*), INTENT(OUT)           :: comment
    INTEGER         , INTENT(OUT)           :: hdferr
    INTEGER(SIZE_T) , INTENT(OUT), OPTIONAL :: bufsize 
    INTEGER(HID_T)  , INTENT(IN) , OPTIONAL :: lapl_id 

Inputs:

  loc_id   - Identifier of a file, group, dataset, or named datatype.
  name     - Name of the object whose comment is to be retrieved, 
             specified as a path relative to loc_id. 

Outputs:

  comment  - The comment.
  hdferr   - Returns 0 if successful and -1 if fails.

Optional parameters:

  bufsize  - Size of the comment buffer.