Messages in this thread | | | Date | Wed, 2 Dec 1998 10:13:21 -0700 (MST) | From | Jim Bourne <> | Subject | Re: High UID support for Linux |
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On 1 Dec 1998, H. Peter Anvin wrote:
> > And since the problem is to replace getpwent with getenv(HOME), you have to > > recognize that the output of getpwent is only used to extract the home > > directory and then patch it up correctly. So much trouble, so little gain. > > > > It's also important to recognize that using getpwent to extract one's > own home directory is *WRONG*. HOME and USER may point to a different > place/user than getuid() and getpwuid(getuid()) will give you; this is > quite common for setuid programs and when using su -m.
I've been following this thread a bit as I'm interested in the problem.
Just a thought, what about using the utmp entry (if the user has a controlling tty mind you) for getting the userid, then do getpwnam() to pull the passwd data on them?
Without a controlling tty, it of course wouldn't work, and in an su situation it would return the real user not the user su'd to... But this might be a better method then using environment vars.
Regards, Jim
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-- James Bourne | Email:jbourne@affinity-systems.ab.ca Affinity Systems Inc. | WWW:http://www.affinty-systems.ab.ca Everything Unix | Linux-The choice of a GNU generation ---------------------------------------------------------------------- Unix System Administration, System programming, Network Administration
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