HP Fortran Programmer's Guide (March 2010)

An overview of HP Fortran
HP-UX operating system
Chapter 1 19
HP-UX operating system
Although the HP-UX operating system does not appear in Figure 1-1 on page 3, it provides a
variety of resources for programs executing within HP-UX. For example, HP-UX captures the
command line you use to invoke an executable program, breaks it up into arguments, and
makes them available to your program.
HP-UX also has many callable system routines that provide low-level access to kernel-level
resources. For example, your program can call HP-UX file-processing routines as alternatives
to Fortran I/O.
“Writing HP-UX applications” on page 173 discusses how HP Fortran programs can take
advantage of HP-UX resources. For a full description of HP-UX system routines, see the
HP-UX Reference.