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Re: [Qemu-devel] [PATCH] Add new user mode option -ignore-environment
From: |
Stefan Weil |
Subject: |
Re: [Qemu-devel] [PATCH] Add new user mode option -ignore-environment |
Date: |
Fri, 16 Jul 2010 15:09:50 +0200 |
User-agent: |
Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.10) Gecko/20100620 Iceowl/1.0b1 Icedove/3.0.5 |
Am 16.07.2010 09:04, schrieb Markus Armbruster:
Stefan Weil<address@hidden> writes:
An empty environment is sometimes useful in user mode.
The new option provides it for linux-user and bsd-user
(darwin-user still has no environment related options).
Stupid question: why is /usr/bin/env insufficient?
[...]
In most cases it is sufficient (but not always available - Windows...).
The options -U and -E are also redundant and can be replaced by
/usr/bin/env.
But -U and -E exist, so completing the set of environment related
options seems to be logical. The name of the new option was
inspired by /usr/bin/env!
And finally, there is a use case where /usr/bin/env is a bad choice:
just look for "getenv" and you will find one in linux-user/main.c.
Removing the environment via /usr/bin/env will also remove
environment variables which are read by qemu's runtime code.