PXFFILENO

POSIX Subroutine: Returns the file descriptor associated with a specified unit.

Module: USE IFPOSIX

Syntax

CALL PXFFILENO (lunit, fd, ierror)

lunit
(Input) INTEGER(4). A Fortran logical unit.

fd
(Output) INTEGER(4). The returned file descriptor.

ierror
(Output) INTEGER(4). The error status.

If successful, ierror is set to zero; otherwise, an error code. Possible error codes are:

• EINVAL: lunit  is not an open unit.
• EBADF: lunit  is not connected with a file descriptor.

The PXFFILENO subroutine returns in fd  the file descriptor associated with lunit.

Note

On Windows* systems, the default value of the POSIX/IO flag is 0, which prevents OPEN from connecting a unit to a file descriptor and causes PXFFILENO to return an error.
To prevent this, call subroutine PXFPOSIXIO and set the value of the POSIX/IO flag to 1. This setting allows a connection to a file descriptor.

Compatibility

CONSOLE STANDARD GRAPHICS QUICKWIN GRAPHICS WINDOWS DLL LIB

See Also

PXFPOSIXIO