Re: Bad configure check

[Andreas Schwab]

Colin Walters <address@hidden> writes:

|> Can anyone suggest a portable way to determine whether or not a program
|> is setuid while it's running?  My original thought was to compare the
|> return values of getuid() and geteuid(), but it seems this will fail if
|> root runs Emacs.

Does it?  Even root should obey setuid to a different user.  And
experiments show that this is the case.

# ls -l /tmp/id
-rwsr-sr-x    1 games    game       107165 Apr 15 17:28 /tmp/id
# /tmp/id
uid=0(root) gid=0(root) euid=12(games) egid=40(game) 
groups=0(root),1(bin),14(uucp),15(shadow),16(dialout),17(audio),65534(nogroup),65533(nobody),52(dbmaker)

Andreas.

-- 
Andreas Schwab, SuSE Labs, address@hidden
SuSE GmbH, Deutschherrnstr. 15-19, D-90429 Nürnberg
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