From: Iain Patterson <me@iain.cx>
Date: Thu, 23 Jan 2014 21:12:43 +0000 (+0000)
Subject: Added more environment functions.
X-Git-Tag: v2.22~40
X-Git-Url: http://git.iain.cx/?a=commitdiff_plain;h=2e3a41e1d5dea82a7f36b331df59ed7532b30b8c;hp=2e3a41e1d5dea82a7f36b331df59ed7532b30b8c;p=nssm.git

Added more environment functions.

useful_environment() skips the uninteresting variables at the start of
an environment block, returning a pointer to the first useful variable.

expand_environment_string() expands a string with
ExpandEnvironmentStrings() and returns a pointer to the expanded string,
which must be freed after use.

set_environment_block() iterates through all the variables in an
environment block, expands each one with expand_environment_string() and
calls SetEnvironmentVariable() with the expanded value.

clear_environment() removes all variables from the current environment.

duplicate_environment() duplicates an environment block by first calling
clear_environment() then set_environment_block() with the source block.
Thus it ensures that the variables in the block - and only those - are
set in the current environment.
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