what is in sysV v4?

[Guy Harris]

>does anyone know what the fnew features of at&t's sys V version 4 of
>unix? I have herd rummors that is supposed to support dynamic linking.

It does.

>does anyone know how this will work.

The same way it works in SunOS 4.1, essentially (although it doesn't
seem to have the same major/minor version number mechanism that SunOS
4.x does).

>I currently work on a SUN workstation using sunos 4.1. it supports
>"dynamic linking" but I would argue that this is not true dynamic
>linking as it only accures when my program loads. I would link to
>be able to link and load on the fly

Then use "dlopen()" and "dlsym()", which are in both SunOS 4.1 and
System V Release 4.  "dlopen()" takes a pathname of a shareable object
(and a flag argument), maps the shareable object into the process's
address space, and returns an opaque handle for that object.  "dlsym()"
takes a handle for a loaded object, and a pointer to a string containing
the name of a function in that object, and returns a pointer to the
function in question.