# PXFCONST

POSIX Subroutine: Returns the value associated with a constant.

## Module

USE IFPOSIX

CALL PXFCONST (constname,ival,ierror)

constname | (Input) Character. The name of one of the following constants: STDIN_UNIT STDOUT_UNIT STDERR_UNIT EINVAL ENONAME ENOHANDLE EARRAYLEN ENOENT ENOTDIR EACCES The constants beginning with E signify various error values for the system variable `errno`.
ival | (Output) INTEGER(4). The returned value of the constant.
ierror | (Output) INTEGER(4). The error status.

If successful, ierror is set to zero; otherwise, it is set to -1.

For more information on these constants, see your Microsoft* Visual C++ documentation (Windows* systems) or the errno.h file (Linux* and macOS systems).

Parent topic: POSIX* Library Routines

## See Also

PXFISCONST