| Routine ID: Z044 | |
|---|---|
| Author(s): F. Carminati, T. Lindelöf, R. Matthews, C. Vosicki, J. Zoll | Library: KERNLIB |
| Submitter: | Submitted: 01.12.1974 |
| Language: Fortran or C or Assembler | Revised: 01.06.1993 |
INTRAC allows an executing module to determine whether it is running interactively or not.
Structure:
FUNCTION subprogram
User Entry Names: INTRAC
Usage:
In any logical expression,
INTRAC()has the value .TRUE. if the module is executing interactively and .FALSE. otherwise. Note that INTRAC must be declared LOGICAL in the calling routine.
Method:
On UNIX machines execution is interactive if 'standard input'
(System Unit 0, i.e. Fortran Unit 5 normally) is
connected to a terminal. The same is true on VAX as from June 1993.