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README file for the admutils V1.23 for Linux.
See installation instructions at the bottom. Currently the latest versions
of this software are maintained at ftp://ftp.daimi.aau.dk/pub/linux/poe/
LICENSE:
This software is distributed as is without any warranty what so ever.
With respect to copyrights it is covered by the GNU Public License.
Version 1.24 (20-Jun-97)
Small patches for glibc compat.
Version 1.23 (6-Jun-97):
Patch by Christophe Thaelemans <thaele@chick.vub.ac.be> to last.c,
no longer considers all users logged out in case of a run-level
change.
Version 1.22 (28-Jan-97):
Clean-up release.
Version 1.21c (27-Jan-97):
Updated setpwnam.[hc] to be in sync with util-linux 2.6, this
also prevents passwd from copying the entire passwd YP/NIS map
into the local /etc/passwd. Edited setpwnam.c somewhat to
improve error checking, beautify the code, and remove output
to stderr.
Fixed a couple of buffer overrun nits in passwd.c, patches from
David Holland.
Version 1.21b (23-Jan-97):
Shutdown now supports a message on the command line, a'la
"shutdown -f +5 'for some reason'"
Version 1.20 (2-Nov-96):
Fix by Steffen Zahn <zahn@berlin.snafu.de> for shutdown.c so it
prints its final message.
Version 1.19 (8-Jul-96):
Fix by faith@cs.unc.edu to allow C-A-D after halting in shutdown.c
Version 1.18 (19-Nov-95):
passwd almost completely rewritten by Martin Schulze
<joey@infodrom.north.de> to use setpwnam() and support
more long options. There's a new man-page as well.
Hacked some more on Martins passwd.c to support -s and -f options.
The old passwd.c is in the Attic/ sub-directory.
Bugfix in shutdown.c to fix file modes.
Version 1.17 (7-Oct-95):
Added setrlimit() calls to passwd.c and chsh.c to fix security hole
caused by resource limitations. Inspired by Zefram
<A.Main@dcs.warwick.ac.uk>. Also beefed up the ptmp locking in
chsh.c.
Added swap_off() function to shutdown.c by baekgrd@ibm.net
(Anders Baekgaard).
Bugfix in shutdown.c that makes sure wtmp gets closed. By
Alexandre Julliard <julliard@sunsite.unc.edu>.
Fixed bug in passwd.c that made it impossible to change from having
no password into having one.
Version 1.16 (18-Sep-95):
Added feature to passwd.c by Arpad Magossanyi (mag@tas.vein.hu),
so root can give a password for a user on the command line. This
might be useful in a shell script autogenerating passwords for
new users.
Added and updated manual pages for all commands by Rick Faith.
Version 1.15d (21-Aug-95):
Fixed minor nit with salt generation in passwd.c
By Steven Reisman <sar@beehive.mn.org>.
Version 1.15c (5-Jul-95):
passwd does not allow reuse of the old password when changing.
passwd returns 1 if the password is not changed. This was
suggested by Anibal Jodorcovsky <anibal@ee.mcgill.ca> who
also fixed my initial bug in this feature.
passwd uses O_EXCL for opening /etc/ptmp instead of access/fopen.
This was suggested by jorge@un1.satlink.com (Jorge).
Version 1.15a (12-Jun-95):
Fix in last.c so it does not print wtmp entries marked DEAD_PROCESS.
By Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
Version 1.15 (5-Jun-95):
Man-page fixes, fixes in pathnames.h to adhere to the FSSTND.
Fix by Rickard Faith <faith@cs.unc.edu> to passwd.c, so sanity
checks come before the second entry of the new password.
This is for Linux 1.2, GCC 2.6.2 or later.
Version 1.14a (12-Mar-95):
Fixed passwd and chsh so a username that is a prefix of another
doesn't affect the other's password. After suggested patch
by Valtteri J. Karu <vatekaru@tuug.utu.fi>, but differently!
Version 1.14 (12-Feb-95):
Added options -l, -y, -i to last.c. See last.man
Version 1.13d (26-Jan-95):
Added some comments on request from Rik Faith. Compiled succesfully
on Linux 1.1.73, GCC 2.5.8, libc 4.5.26
Version 1.13c (6-Dec-94):
New versions of passwd and chsh due to Alvaro Martinez Echevarria
<alvaro@enano.etsit.upm.es>, so they will coexist with YP/NIS
passwords.
Version 1.13b (7-Nov-94):
Use fgets() + atoi() in chsh.c instead of scanf().
Version 1.12 (17-Sep-94):
Rik Faith provided patches for passwd.c to let non-alphabetics count
as digits as well, allows more obscure passwords.
Applied patches from Dave Gentzel <gentzel@nova.enet.dec.com>
to prevent dereferencing a NULL pointer, and turn off accounting
in shutdown.c
Version 1.11 (18-Aug-94):
Finally got around to making it a non-alpha version. Just a
little cleanup in Makefile
Version 1.10b (8-Jun-94):
David A. Holland <dholland@husc.harvard.edu> made me aware of a
security leak in passwd and chsh. /etc/ptmp could be forced to
be world-writeable. Fixed by hardwiring an umask of 022 into
passwd and chsh.
Vesa Ruokonen <ruokonen@taivas.lut.fi> sent me a new pathnames.h
file that shouldn't conflict with paths.h.
Cleaned the source a bit for -Wall
Version 1.10a (31-May-94):
Vesa Ruokonen <ruokonen@taivas.lut.fi> provided a patch for
passwd.c such that it will work for multiple usernames for
the same uid. I mimicked his actions on chsh.c. In both cases
I added a check to ensure that even if utmp is hacked, one can
only change the password for users with the same uid.
Version 1.9 (9-Feb-94):
Vesa Ruokonen suggested that newgrp should support passwords in
/etc/group. It now does. I mostly rewrote newgrp to make it
cleaner.
Version 1.8 (19-Jan-94):
Rik Faith provided several patches, especially for passwd.c and
some man-pages.
Version 1.7 (3-Nov-93): changes since 1.6
Shutdown can now be used as a login shell. I forget who sent me the
patch. Example /etc/passwd entry:
shutdown:dLbVbIMx7bVHw:0:0:Stopper:/:/etc/halt
The package should now be prepared to have shutdown in /sbin as well
as in /etc. utmp and wtmp are allowed in /usr/adm too. Both things
are configurable in the Makefile.
<flebbe@cygnus.tat.physik.uni-tuebingen.de> Olaf Flebbe provided a
patch for chsh.c to make it work.
This version is built under linux 0.99.13 with gcc 2.4.3 and
libc 4.4.1
Version 1.6 (1-Jun-93)
Shutdown now looks more like shutdown on SunOS, but not quite. Most
of this was done by Scott Telford (s.telford@ed.ac.uk), but I
butchered his patches somewhat. This version was built under Linux
0.99.9 with GCC 2.3.3 and libc 4.3.3.
"make install" will now install shutdown in /etc instead of /usr/bin
Version 1.5 (13-Dec-92)
This version is tested and built under Linux 0.98P6 with gcc-2.2.2d7
You will have a hard time making it work with the older compilers and
libraries.
Su is now deprecated. I believe that the GNU/FSF version is better.
CONTENTS.
last - A new and better last command, a port from BSD done by
Michael Haardt.
I put a couple of if's in so LOGIN_PROCESS entries in wtmp
are not printed.
chsh - CHangeSHell changes the shell entry in the passwd file.
Written from scratch by me.
passwd - Changes the password in the passwd file.
Also done from scratch by me.
su - A su(1) command by me.
newgrp - Sets the gid if possible, ala su(1), written by Michael
Haardt.
shutdown - Shuts down linux. Supports timed shutdowns, and sends
warnings to all users currently logged in. It then
kills all processes and unmounts file-systems etc.
Shutdown also doubles as halt and reboot commands.
Shutdown leaves the file /etc/nologin behind after shutdown,
it is wise to have a "rm -f /etc/nologin" in ones /etc/rc
Shutdown now supports a -s switch, that works in connection
with the init program in poeigl-1.7 or later, so a singleuser
reboot is possible.
Rick Sladkey <jrs@world.std.com> provided patches for better
umounting code, needed in connection with NFS.
Remy Card <card@masi.ibp.fr> provided patches for support for
fastboot/fasthalt. These create a /fastboot file on shutdown,
and /etc/rc may check for the existance of this file, to
optionally skip fsck.
example.rc An example of an /etc/rc file. Edit it to suit your own setup.
ctrlaltdel - Sets the behaviour of the Ctrl-Alt-Del combination.
"ctrlaltdel hard" makes the key-combination instantly reboot
the machine without syncing the disk or anything. This may
very well corrupt the data on the disk.
"ctrlaltdel soft" makes the key-combination send a SIGINT to
the init process. Such a command would typically be in /etc/rc.
For this to make sense you must run the init from the
poeigl-1.4 package or later. The System V compatible init in
this package won't reboot the machine when it gets a SIGINT.
Linux version 0.96b-PL1 or later is also needed for this
feature to work.
init is gone as of V1.5, it was outdated and buggy. If you want a
SYSV compatible init get the newest one from Mike Smoorenburg, called
sysvinit.tar.Z
INSTALLATION.
Simply do a
make
and then (optionally) as root:
make install
- Peter (poe@daimi.aau.dk)
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