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extern ** environ...

Hi Everyone,

I once had a look at a code having the following declaration,

extern ** environ or extern char ** environ...

I lost the code and i'm wondering what is the exact need of this? Does
anyone have any idea on this?

Thanks in advance!!!
Jan 13 '08 #1
1 7118
On Jan 13, 9:16 am, Rahul <sam_...@yahoo.co.inwrote:
I once had a look at a code having the following declaration,
extern ** environ or extern char ** environ...
I lost the code and i'm wondering what is the exact need of
this? Does anyone have any idea on this?
It should be "extern char** environ". And it is a Unixism;
according to Posix, it should be declared in <unistd.h>. See
http://www.unix.org/single_unix_specification/ for more
information (search for environ). And of course, don't use it
in portable code, although I wouldn't be too surprised if
Windows supported it as well. (In practice, it is exceedingly
rare to need to access it directly in Unix as well. I may have
done so once, in twenty years of Unix programming, and that was
implementing the getenv() function.)

James Kanze (GABI Software) email:ja*********@gmail.com
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Jan 13 '08 #2

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