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/GNU Fortran 7

9.156 ISATTY — Whether a unit is a terminal device.

Description:

Determine whether a unit is connected to a terminal device.

Standard:

GNU extension

Class:

Function

Syntax:

RESULT = ISATTY(UNIT)

Arguments:
UNIT Shall be a scalar INTEGER.
Return value:

Returns .TRUE. if the UNIT is connected to a terminal device, .FALSE. otherwise.

Example:
PROGRAM test_isatty
  INTEGER(kind=1) :: unit
  DO unit = 1, 10
    write(*,*) isatty(unit=unit)
  END DO
END PROGRAM
See also:

TTYNAM

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Licensed under the GNU Free Documentation License, Version 1.3.
https://gcc.gnu.org/onlinedocs/gcc-7.1.0/gfortran/ISATTY.html