maximum length of process command stored in unix

From: championsleeper (strepxe_at_yahoo.co.uk)
Date: 03/29/05 

Date: 29 Mar 2005 12:13:08 -0800

can anyone inform me on the maximum length of a command which is
stored in the process control block structure on the various flavours
of unix. i've noticed that for long commands even with the -e option
on hp-ux 11i you do not get the full binary listing. i've managed to
get more using the UNIX95=ps ... syntax but really want to know:
a. what is the maximum character length stored per o/s,
b. what are the best native commands e.g. ps, UNIX95 to use to access
the maximum data available and,
c. are there any advantages of accessing process information through
native libaries aviaialble in c, c++, perl on these systems.

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