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Re: environment setup problem with "env -"
On Mon, 12 Jan 2004, Christopher Faylor wrote:
> On Mon, Jan 12, 2004 at 02:24:01PM -0500, Igor Pechtchanski wrote:
> >FWIW, here's what I get on my machine:
> >
> >$ env - /bin/env
> >HOMEDRIVE=C:
> >HOMEPATH=\
> >LOGONSERVER=\\PECHTCHA
> >SYSTEMDRIVE=C:
> >SYSTEMROOT=C:\WINNT
> >USERDOMAIN=PECHTCHA
> >USERNAME=igor
> >USERPROFILE=C:\Documents and Settings\igor
> >$
> >
> >Using "/bin/sh -c set" adds IFS, PATH, PS1, and PS2.
>
> That's what I remember from our previous investigations into this
> matter. I didn't like the fact that we couldn't actually eliminate all
> of the environment if that's what the user asked to do but I was
> overruled by Microsoft.
I've looked at fork_parent() in fork.cc (below, note the line marked with
an arrow):
rc = CreateProcess (myself->progname, /* image to run */
myself->progname, /* what we send in arg0 */
sec_attribs,
sec_attribs,
TRUE, /* inherit handles from parent */
c_flags,
----> NULL, /* environment filled in later */
0, /* use current drive/directory */
&si,
&pi);
According to MSDN, if the environment parameter is NULL, it will be
inherited from the parent process. I'm not sure if this is significant,
but spawn_guts() in spawn.cc explicitly passes the environment pointer to
CreateProcess, rather than inheriting the parent's one. Is there a
particular reason this isn't done in fork_parent()?
> I've been overruled by Microsoft all of last week as I attempt to fix
> the problems on WinME, in fact. My wife is getting tired of saying
> "Don't worry you'll figure it out, honey".
>
> In honing my skills for this problem, I've managed to bend steel bars
> with my mind and cause fires to start from a distance but I haven't been
> able to penetrate the inscrutable "pwd has caused a problem with
> cygwin1.dll" errors. I just can't seem to master the ancient art of
> Windows telepathy.
>
> cgf
Well, WinME probably has its own brand of telepathy that's incompatible
with all the other Windows versions...
Igor
--
http://cs.nyu.edu/~pechtcha/
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|,4- ) )-,_. ,\ ( `'-' Igor Pechtchanski, Ph.D.
'---''(_/--' `-'\_) fL a.k.a JaguaR-R-R-r-r-r-.-.-. Meow!
"I have since come to realize that being between your mentor and his route
to the bathroom is a major career booster." -- Patrick Naughton