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From: karish@mindcraft.com (Chuck Karish)
Newsgroups: news.software.b
Subject: Re: Help on Relaynews
Summary: setuid()
Message-ID: <675469204.26884@mindcraft.com>
Date: 28 May 91 22:20:03 GMT
References: <1991May17.003758.17351@bpdsun1.uucp> <1991May18.212857.21302@zoo.toronto.edu> <8028@auspex.auspex.com> <2072@ecicrl.ocunix.on.ca>
Organization: Mindcraft, Inc.
Lines: 30

In article <2072@ecicrl.ocunix.on.ca> clewis@ferret.ocunix.on.ca
(Chris Lewis) writes:
>In article <8028@auspex.auspex.com> guy@auspex.auspex.com (Guy Harris) writes:
>>>You said "yes" when build asked whether you could do setuid(geteuid()).
>>>Wrong.  (On SunOS, yet... sigh.)
>>exactly what "setuid(geteuid())" is supposed to do.
>
>I installed cnews on a Sun 4/470, and consulted the setuid() manual on this
>very question.  There is apparently a configuration parameter that enables/
>disables this.  It was called something like _POSIX_SUID.

The Sun manual page gives both a DESCRIPTION and a SYSTEM V DESCRIPTION.
It also provides the following NOTE, which may apply to either or
both of the DESCRIPTIONs:

     For    setuid()    to    behave    as    described    above,
     {_POSIX_SAVED_IDS}  must  be  in  effect  (see sysconf(2V)).
     {_POSIX_SAVED_IDS} is always in effect on SunOS systems, but
     for  portability,  applications  should  call  sysconf()  to
     determine whether {_POSIX_SAVED_IDS} is in  effect  for  the
     current system.

{_POSIX_SAVED_IDS} is a property of the operating system.  It may or
may not be settable as a kernel parameter, depending on the OS.

There, is that all clear now?
-- 

	Chuck Karish		karish@mindcraft.com
	Mindcraft, Inc.		(415) 323-9000