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- From: Stephen Usher <steve@earth.ox.ac.uk>
- Subject: Bugs in the mntlib32 Bugs file.
- Date: Fri, 25 Jun 1993 08:14:08 +0100 (BST)
- Mime-Version: 1.0
-
- Here's some comments on the mntlib32 Bugs file. I've been meaning to send a
- message such as this for a long time, well I've finally got around to it!
-
- >utmp.c: ++boender
- > The utmp structure as defined differs from the System V structure.
- > Now, I don't know what BSD does, but I'll look it up.
-
- This IS the BSD structure, it's source code compatable. The wtmp file is
- able to be correctly interpreted by the Sun last(1) command.
-
- > Do you know what POSIX says about the utmp structure?
-
- I doubt it says much, if anything about it.
-
- > Also, the System V getutent, getutid, etc. calls are missing from
- > the mintlibs, but they are so dependent on fields in the utmp
- > structure that are missing in the mintlibs that they cannot be
- > written without changing the utmp structure.
-
- Well... probably this is because BSD doesn't need all this extra info.
-
- > I think complying with POSIX on this would be a Good Thing; if
- > someone could send me the relevant parts, I'll write the routines.
- > Note that all kind of stuff is dependent on this and has to be
- > emulated in the mintlibs, like getlogin(), or left out altogether,
- > like ttyslot().
-
- This is what SunOS 4.1 says about ttyslot(3V)...
-
- TTYSLOT(3V) C LIBRARY FUNCTIONS TTYSLOT(3V)
-
- NAME
- ttyslot - find the slot in the utmp file of the current pro-
- cess
-
- SYNOPSIS
- int ttyslot()
-
- DESCRIPTION
- ttyslot() returns the index of the current user's entry in
- /etc/utmp. This is accomplished by actually scanning the
- file /etc/ttytab for the name of the terminal associated
- with the standard input, the standard output, or the error
- output (0, 1 or 2).
-
- As SunOS has the same utmp and ttytab structures as my init(8) package the
- MiNT library should be able to do the same. Similarly getlogin(3V).
-
- > Oh, and this: changing the utmp structure is a pretty large
- > operation, since init(1) will have to be overhauled completely.
- > As I don't think MiNT will ever write /etc/utmp and /etc/wtmp
- > structures on booting, perhaps we should leave this be.
-
- Please note that the routines in utmp.c were merely utility routines for my
- init(8) package which were added to the library because they seemed useful
- to people. There are no equivalent routines in either SYSVr* or BSD.
-
- I hope this clears things up a bit.
-
- Steve
-
- --
- ---------------------------------------------------------------------------
- Computer Systems Administrator, Dept. of Earth Sciences, Oxford University.
- E-Mail: steve@uk.ac.ox.earth (JANET) steve@earth.ox.ac.uk (Internet).
- Tel:- Oxford (0865) 282110 (UK) or +44 865 282110 (International).
-