c2dfe9fe01
In passwd(1):
- Gut most of yp_passwd.c and leave only a few things that aren't common
to pw_yp.c.
- Add support for -d and -h flags to select domains and NIS server hosts
to use when updating NIS passwords. This allows passwd(1) to be used
for changing NIS passwords from machines that aren't configured as
NIS clients. (This is mostly to allow passwd(1) to work on NIS master
servers that aren't configured as clients -- an NIS server need not
necessarily be configured as a client itself.)
NOTE: Realize that having the ability to specify a domain and hostname
lets you use passwd(1) (and chpass(1) too) to submit update requests
to yppasswd daemons running on remote servers in remote domains which
you may not even be bound to. For example, my machine at home is not
an NIS client of the servers on the network that I manage, yet I can
easily change my password at work using my FreeBSD box at home by doing:
'passwd -d work.net.domain -h any.nis.server.on.my.net wpaul'. (Yes,
I do use securenets at work; temporarily modified my securenets file
to give my home system access.) Some people may not be too thrilled
with this idea. Those who don't like this feature can recompile passwd(1)
and chpass(1) with -DPARANOID to restrict the use of these flags to
the superuser.
(Oh, I should be adding proper securenets support to ypserv(8) and
rpc.yppasswdd(8) over the weekend.)
- Merge in changes to allow root on the NIS master server to bypass
authentication and change any user's NIS password. (The super-user
on the NIS master already has privileges to do this, but doing it
through passwd(1) is much easier than updating the maps by hand.)
Note that passwd(1) communicates with rpc.yppasswdd(8) via a UNIX
domain socket instead of via standard RPC/IP in this case.
- Update man page.
In chpass(1):
- Fix pw_yp.c to work properly in environments where NIS client
services aren't available.
- Use realloc() instead of malloc() in copy_yp_pass() and copy_local_pass().
- Fix silly bug in copy_yp_pass(); some of the members of the passwd
structure weren't being filled in correctly. (This went unnoticed
for a while since the old yppasswdd didn't allow changes to the
fields that were being botched.)
- chpass(1) now also allows the superuser on the NIS master server to
make unrestricted changes to any user's NIS password information.
- Use UNIX domain comm channel to rpc.yppasswdd(8) when run by the
superuser on the NIS master. This allows several new things:
o superuser can update an entire master.passwd.{byname,byuid} entry
o superuser can update records in arbitrary domains using -d flag to
select a domain (before you could only change the default domain)
o superuser can _add_ records to the NIS master.passwd maps, provided
rpc.yppasswdd(8) has been started with the -a flag (to do this,
the superuser must force NIS operation by specifying the -y flag
to chpass(1) along with -a, i.e. 'chpass -y -a 'foo:::::::::')
- Back out the 'chpass -a <new password entry> breaks with NIS' fix
from the last revision and fix it properly this time. The previous
revision fixed the immediate problem but broke NIS operation in
some cases.
- In edit.c, be a little more reasonable about deciding when to
prevent the shell field from being changed.
Submitted by Charles Owens <owensc@enc.edu>, who said:
"I made a minor (one-line) modification to chpass, with regards
to whether or not it allows the changing of shells. In the 2.0.5 code,
field changing follows the settings specified in the "list" structure
defined in table.c . For the shell, though, this is ignored. A quick
look in edit.c showed me why, but I don't understand why it was written as
such. The logic was
if shell is standard shell, allow changing
I changed it to
if shell changing is allowed (per table.c) and it is a standard shell
OR if uid=0, then allow changing."
Makes sense to me.
- Update man page.
126 lines
4.2 KiB
C
126 lines
4.2 KiB
C
/*
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* Copyright (c) 1995
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* Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Bill Paul.
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* 4. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* NIS interface routines for chpass
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*
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* Written by Bill Paul <wpaul@ctr.columbia.edu>
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* Center for Telecommunications Research
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* Columbia University, New York City
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*
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* $Id: pw_yp.h,v 1.8 1996/02/17 18:14:23 wpaul Exp $
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*/
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#ifdef YP
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#include <sys/types.h>
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#include <rpc/rpc.h>
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#include <rpc/auth.h>
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#include <rpc/auth_unix.h>
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/* Four possible return codes from use_yp() */
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#define USER_UNKNOWN 0
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#define USER_YP_ONLY 1
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#define USER_LOCAL_ONLY 2
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#define USER_YP_AND_LOCAL 3
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extern int force_old;
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extern int _use_yp;
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extern int suser_override;
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extern struct passwd local_password;
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extern struct passwd yp_password;
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extern void copy_yp_pass __P(( char *, int, int ));
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extern char *yp_domain;
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extern char *yp_server;
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extern void yp_submit __P(( struct passwd * ));
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extern int use_yp __P(( char * , uid_t , int ));
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extern char *get_yp_master __P(( int ));
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/*
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* Yucky.
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*/
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#define GETPWUID(X) \
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_use_yp = use_yp(NULL, X, 1); \
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\
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if (_use_yp == USER_UNKNOWN) { \
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errx(1, "unknown user: uid %u", X); \
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} \
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\
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if (_use_yp == USER_YP_ONLY) { \
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if (!force_local) { \
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_use_yp = 1; \
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pw = (struct passwd *)&yp_password; \
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} else \
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errx(1, "unknown local user: uid %u", X); \
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} else if (_use_yp == USER_LOCAL_ONLY) { \
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if (!force_yp) { \
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_use_yp = 0; \
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pw = (struct passwd *)&local_password; \
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} else \
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errx(1, "unknown NIS user: uid %u", X); \
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} else if (_use_yp == USER_YP_AND_LOCAL) { \
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if (!force_local) { \
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_use_yp = 1; \
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pw = (struct passwd *)&yp_password; \
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} else { \
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_use_yp = 0; \
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pw = (struct passwd *)&local_password; \
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} \
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}
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#define GETPWNAM(X) \
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_use_yp = use_yp(X, 0, 0); \
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\
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if (_use_yp == USER_UNKNOWN) { \
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errx(1, "unknown user: %s", X); \
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} \
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\
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if (_use_yp == USER_YP_ONLY) { \
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if (!force_local) { \
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_use_yp = 1; \
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pw = (struct passwd *)&yp_password; \
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} else \
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errx(1, "unknown local user: %s.", X); \
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} else if (_use_yp == USER_LOCAL_ONLY) { \
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if (!force_yp) { \
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_use_yp = 0; \
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pw = (struct passwd *)&local_password; \
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} else \
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errx(1, "unknown NIS user: %s.", X); \
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} else if (_use_yp == USER_YP_AND_LOCAL) { \
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if (!force_local) { \
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_use_yp = 1; \
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pw = (struct passwd *)&yp_password; \
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} else { \
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_use_yp = 0; \
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pw = (struct passwd *)&local_password; \
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} \
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}
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#endif /* YP */
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