[Bug 268479] lib/libc/stdlib/getenv.c may have a problem with putenv()

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=268479

--- Comment #13 from Tatsuki Makino <tatsuki_makino@hotmail.com> ---
The variable environ is a char**, so the memory containing strings such as
UNAME_*= does not have to be continuous like "UNAME_s=\0UNAME_n=".
The array holding the points where the envstring is stored is always contiguous
in realloc.
As you can see in /usr/src/lib/libc/stdlib/getenv.c when you try to rewrite
env, it is replaced with the newly allocated memory.

Is it? :)

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