Frank Chu wrote:
Hi,
Does anybody know if there is a control block chain that I can walk to
find all of the envars that are define? I know there is a LE C
function that can query for a specified envar but I can't use LE C.
And there are circumstances where I do not have access to the parm
list pointer that is passed to the executing program, so I can't rely
on that guy to find the envars. I've also gone through the USS
Callable Assembler Services Guide and it doesn't look like there is a
service for this either.
Thanks in advance.
Frank
Just FYI - in a UNIX environment the address of the incoming environment
variable array
is stuffed away in an external variable named "environ":
extern char **environ;
The Dignus C runtime (also non-LE) makes that available... basically at
the start-up of an
exec'd program you have to copy the incoming variables into a blob of memory
and point 'environ' to the blob... (because the format from IBM doesn't
match
the UNIXy way of doing it.)
Then, your program can merrily reference 'environ' (getenv/setenv,
etc... also
just reference 'environ'.)
If you are a non-LE program that has been exec'd; you probably want to take
the same approach and make those copies when you start execution; then
provide
functions that can reference the copies (e.g. your own getenv/setenv
functions.)
There is no "magic" to these environment variables - they are simply passed
on the exec() call... that's how they pass from parent-to-child in the
UNIX environmnt.
No need for a defined location beyond the per-program copy (and that
copy is up to
the program.)
- Dave R. -
--
[email protected] Work: (919) 676-0847
Get your mainframe programming tools at http://www.dignus.com
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