pxfisatty(3F)

NAME
     PXFISATTY - Determines if file descriptor corresponds to a valid file
     descriptor

SYNOPSIS
     SUBROUTINE PXFISATTY (ifildes, isatty, ierror)
     INTEGER ifildes, ierror
     LOGICAL isatty

STANDARDS
     IEEE standard interface for FORTRAN 77

DESCRIPTION
     This routine is in libfortran.so which is linked by default when
     compiling programs with the MIPSpro 7 Fortran 90 compiler or when
     compiling programs with the -craylibs option to the MIPSpro F77
     compiler.

     The PXFISATTY routine uses isatty(3C) to determine if ifildes is a
     valid file descriptor for a terminal.

     All arguments must be of default kind unless documented otherwise.  On
     IRIX systems, the default kind is KIND=4.

     The following is a list of valid arguments for this routine:

     ifildes   An input integer variable containing the file descriptor to
               be checked for an associated terminal.

     isatty    An output logical variable which is .TRUE.  when ifildes is
               a file descriptor with an associated terminal. Otherwise
               isatty is .FALSE..

     ierror    An output integer variable for the PXFISATTY completion
               status. ierror contains zero if PXFISATTY was successful.

NOTES
     The PXF_DEFINITIONS module can be used by Fortran 90 users to enable
     caller-callee interface checking.

EXAMPLES
          program pxftest
          integer len, ifildes, ierror, O_RDONLY
          character*20 path
          logical isatty
          CALL PXFCTERMID(path,len,ierror)
          CALL PXFCONST('O_RDONLY',O_RDONLY,error)
          CALL PXFOPEN(path,len,O_RDONLY,400,ifildes,error)
          CALL PXFISATTY(ifildes,isatty,ierror)
          print *,isatty
          end

SEE ALSO
     PXFCONST(3F), PXFOPEN(3F)
     ttyname(3C)