2580 lines
59 KiB
C
2580 lines
59 KiB
C
/* $NetBSD: getpwent.c,v 1.77 2010/03/23 20:28:59 drochner Exp $ */
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/*-
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* Copyright (c) 1997-2000, 2004-2005 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Luke Mewburn.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1988, 1993
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* The Regents of the University of California. 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. Neither the name of the University nor the names of its 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 THE REGENTS 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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/*
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* Portions Copyright (c) 1994, 1995, Jason Downs. 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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* 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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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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#if 0
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static char sccsid[] = "@(#)getpwent.c 8.2 (Berkeley) 4/27/95";
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#else
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__RCSID("$NetBSD: getpwent.c,v 1.77 2010/03/23 20:28:59 drochner Exp $");
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#endif
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#endif /* LIBC_SCCS and not lint */
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#include "namespace.h"
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#include "reentrant.h"
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#include <sys/param.h>
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#include <assert.h>
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#include <db.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <limits.h>
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#include <netgroup.h>
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#include <nsswitch.h>
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#include <pwd.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <syslog.h>
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#include <unistd.h>
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#ifdef HESIOD
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#include <hesiod.h>
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#endif
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#ifdef YP
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#include <machine/param.h>
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#include <rpc/rpc.h>
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#include <rpcsvc/yp_prot.h>
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#include <rpcsvc/ypclnt.h>
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#endif
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#include "pw_private.h"
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#define _PASSWD_COMPAT /* "passwd" defaults to compat, so always provide it */
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#ifdef __weak_alias
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__weak_alias(endpwent,_endpwent)
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__weak_alias(setpassent,_setpassent)
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__weak_alias(setpwent,_setpwent)
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#endif
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#ifdef _REENTRANT
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static mutex_t _pwmutex = MUTEX_INITIALIZER;
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#endif
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const char __yp_token[] = "__YP!"; /* Let pwd_mkdb pull this in. */
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/*
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* The pwd.db lookup techniques and data extraction code here must be kept
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* in sync with that in `pwd_mkdb'.
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*/
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#if defined(YP) || defined(HESIOD)
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/*
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* _pw_parse
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* Parses entry using pw_scan(3) (without the trailing \n)
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* after copying to buf, and fills in pw with corresponding values.
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* If old is non-zero, entry is in _PASSWORD_OLDFMT.
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* Returns 1 if parsed successfully, 0 on parse failure.
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*/
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static int
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_pw_parse(const char *entry, struct passwd *pw, char *buf, size_t buflen,
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int old)
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{
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int flags;
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_DIAGASSERT(entry != NULL);
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_DIAGASSERT(pw != NULL);
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_DIAGASSERT(buf != NULL);
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if (strlcpy(buf, entry, buflen) >= buflen)
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return 0;
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flags = _PASSWORD_NOWARN;
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if (old)
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flags |= _PASSWORD_OLDFMT;
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return __pw_scan(buf, pw, &flags);
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}
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#endif /* YP || HESIOD */
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/*
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* _pw_opendb
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* if *db is NULL, dbopen(3) /etc/spwd.db or /etc/pwd.db (depending
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* upon permissions, etc)
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*/
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static int
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_pw_opendb(DB **db, int *version)
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{
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static int warned;
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DBT key;
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DBT value;
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const char *dbfile = NULL;
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_DIAGASSERT(db != NULL);
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_DIAGASSERT(version != NULL);
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if (*db != NULL) /* open *db */
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return NS_SUCCESS;
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if (geteuid() == 0) {
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dbfile = _PATH_SMP_DB;
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*db = dbopen(dbfile, O_RDONLY, 0, DB_HASH, NULL);
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}
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if (*db == NULL) {
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dbfile = _PATH_MP_DB;
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*db = dbopen(dbfile, O_RDONLY, 0, DB_HASH, NULL);
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}
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if (*db == NULL) {
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if (!warned) {
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int serrno = errno;
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syslog(LOG_ERR, "%s: %m", dbfile);
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errno = serrno;
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}
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warned = 1;
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return NS_UNAVAIL;
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}
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key.data = __UNCONST("VERSION");
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key.size = strlen((char *)key.data) + 1;
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switch ((*(*db)->get)(*db, &key, &value, 0)) {
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case 0:
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if (sizeof(*version) != value.size)
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return NS_UNAVAIL;
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(void)memcpy(version, value.data, value.size);
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break; /* found */
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case 1:
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*version = 0; /* not found */
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break;
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case -1:
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return NS_UNAVAIL; /* error in db routines */
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default:
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abort();
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}
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return NS_SUCCESS;
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}
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/*
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* _pw_getkey
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* Lookup key in *db, filling in pw
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* with the result, allocating memory from buffer (size buflen).
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* (The caller may point key.data to buffer on entry; the contents
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* of key.data will be invalid on exit.)
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*/
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static int
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_pw_getkey(DB *db, DBT *key,
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struct passwd *pw, char *buffer, size_t buflen, int *pwflags,
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int version)
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{
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char *p, *t;
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DBT data;
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_DIAGASSERT(db != NULL);
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_DIAGASSERT(key != NULL);
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_DIAGASSERT(pw != NULL);
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_DIAGASSERT(buffer != NULL);
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/* pwflags may be NULL (if we don't care about them */
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if (db == NULL) /* this shouldn't happen */
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return NS_UNAVAIL;
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switch ((db->get)(db, key, &data, 0)) {
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case 0:
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break; /* found */
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case 1:
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return NS_NOTFOUND; /* not found */
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case -1:
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return NS_UNAVAIL; /* error in db routines */
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default:
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abort();
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}
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p = (char *)data.data;
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if (data.size > buflen) {
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errno = ERANGE;
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return NS_UNAVAIL;
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}
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/*
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* THE DECODING BELOW MUST MATCH THAT IN pwd_mkdb.
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*/
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t = buffer;
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#define MACRO(a) do { a } while (/*CONSTCOND*/0)
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#define EXPAND(e) MACRO(e = t; while ((*t++ = *p++));)
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#define SCALAR(v) MACRO(memmove(&(v), p, sizeof v); p += sizeof v;)
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EXPAND(pw->pw_name);
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EXPAND(pw->pw_passwd);
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SCALAR(pw->pw_uid);
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SCALAR(pw->pw_gid);
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if (version == 0) {
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int32_t tmp;
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SCALAR(tmp);
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pw->pw_change = tmp;
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} else
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SCALAR(pw->pw_change);
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EXPAND(pw->pw_class);
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EXPAND(pw->pw_gecos);
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EXPAND(pw->pw_dir);
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EXPAND(pw->pw_shell);
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if (version == 0) {
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int32_t tmp;
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SCALAR(tmp);
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pw->pw_expire = tmp;
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} else
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SCALAR(pw->pw_expire);
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if (pwflags) {
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/* See if there's any data left. If so, read in flags. */
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if (data.size > (size_t) (p - (char *)data.data)) {
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SCALAR(*pwflags);
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} else { /* default */
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*pwflags = _PASSWORD_NOUID|_PASSWORD_NOGID;
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}
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}
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return NS_SUCCESS;
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}
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/*
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* _pw_memfrombuf
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* Obtain want bytes from buffer (of size buflen) and return a pointer
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* to the available memory after adjusting buffer/buflen.
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* Returns NULL if there is insufficient space.
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*/
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static char *
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_pw_memfrombuf(size_t want, char **buffer, size_t *buflen)
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{
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char *rv;
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if (want > *buflen) {
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errno = ERANGE;
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return NULL;
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}
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rv = *buffer;
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*buffer += want;
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*buflen -= want;
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return rv;
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}
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/*
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* _pw_copy
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* Copy the contents of frompw to pw; memory for strings
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* and arrays will be allocated from buf (of size buflen).
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* If proto != NULL, use various fields in proto in preference to frompw.
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* Returns 1 if copied successfully, 0 on copy failure.
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* NOTE: frompw must not use buf for its own pointers.
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*/
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static int
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_pw_copy(const struct passwd *frompw, struct passwd *pw,
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char *buf, size_t buflen, const struct passwd *protopw, int protoflags)
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{
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size_t count;
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int useproto;
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_DIAGASSERT(frompw != NULL);
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_DIAGASSERT(pw != NULL);
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_DIAGASSERT(buf != NULL);
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/* protopw may be NULL */
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useproto = protopw && protopw->pw_name;
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#define COPYSTR(to, from) \
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do { \
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count = strlen((from)); \
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(to) = _pw_memfrombuf(count+1, &buf, &buflen); \
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if ((to) == NULL) \
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return 0; \
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memmove((to), (from), count); \
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to[count] = '\0'; \
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} while (0) /* LINTED */
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#define COPYFIELD(field) COPYSTR(pw->field, frompw->field)
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#define COPYPROTOFIELD(field) COPYSTR(pw->field, \
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(useproto && *protopw->field ? protopw->field : frompw->field))
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COPYFIELD(pw_name);
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#ifdef PW_OVERRIDE_PASSWD
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COPYPROTOFIELD(pw_passwd);
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#else
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COPYFIELD(pw_passwd);
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#endif
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if (useproto && !(protoflags & _PASSWORD_NOUID))
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pw->pw_uid = protopw->pw_uid;
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else
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pw->pw_uid = frompw->pw_uid;
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if (useproto && !(protoflags & _PASSWORD_NOGID))
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pw->pw_gid = protopw->pw_gid;
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else
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pw->pw_gid = frompw->pw_gid;
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pw->pw_change = frompw->pw_change;
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COPYFIELD(pw_class);
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COPYPROTOFIELD(pw_gecos);
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COPYPROTOFIELD(pw_dir);
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COPYPROTOFIELD(pw_shell);
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#undef COPYSTR
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#undef COPYFIELD
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#undef COPYPROTOFIELD
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return 1;
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}
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/*
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* files methods
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*/
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/* state shared between files methods */
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struct files_state {
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int stayopen; /* see getpassent(3) */
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DB *db; /* passwd file handle */
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int keynum; /* key counter, -1 if no more */
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int version;
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};
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static struct files_state _files_state;
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/* storage for non _r functions */
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static struct passwd _files_passwd;
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static char _files_passwdbuf[_GETPW_R_SIZE_MAX];
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|
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static int
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_files_start(struct files_state *state)
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{
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int rv;
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_DIAGASSERT(state != NULL);
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|
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state->keynum = 0;
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rv = _pw_opendb(&state->db, &state->version);
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if (rv != NS_SUCCESS)
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return rv;
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return NS_SUCCESS;
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}
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|
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static int
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_files_end(struct files_state *state)
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{
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_DIAGASSERT(state != NULL);
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state->keynum = 0;
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if (state->db) {
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(void)(state->db->close)(state->db);
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state->db = NULL;
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}
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return NS_SUCCESS;
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}
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|
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/*
|
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* _files_pwscan
|
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* Search state->db for the next desired entry.
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* If search is _PW_KEYBYNUM, look for state->keynum.
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* If search is _PW_KEYBYNAME, look for name.
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* If search is _PW_KEYBYUID, look for uid.
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* Sets *retval to the errno if the result is not NS_SUCCESS
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* or NS_NOTFOUND.
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*/
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static int
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_files_pwscan(int *retval, struct passwd *pw, char *buffer, size_t buflen,
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struct files_state *state, int search, const char *name, uid_t uid)
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{
|
|
const void *from;
|
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size_t fromlen;
|
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DBT key;
|
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int rv;
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|
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_DIAGASSERT(retval != NULL);
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_DIAGASSERT(pw != NULL);
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_DIAGASSERT(buffer != NULL);
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_DIAGASSERT(state != NULL);
|
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/* name is NULL to indicate searching for uid */
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|
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*retval = 0;
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|
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if (state->db == NULL) { /* only start if file not open yet */
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rv = _files_start(state);
|
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if (rv != NS_SUCCESS)
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goto filespwscan_out;
|
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}
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|
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for (;;) { /* search for a match */
|
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switch (search) {
|
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case _PW_KEYBYNUM:
|
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if (state->keynum == -1)
|
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return NS_NOTFOUND; /* no more records */
|
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state->keynum++;
|
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from = &state->keynum;
|
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fromlen = sizeof(state->keynum);
|
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break;
|
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case _PW_KEYBYNAME:
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from = name;
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fromlen = strlen(name);
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break;
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case _PW_KEYBYUID:
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from = &uid;
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fromlen = sizeof(uid);
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break;
|
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default:
|
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abort();
|
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}
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|
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if (buflen <= fromlen) { /* buffer too small */
|
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*retval = ERANGE;
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return NS_UNAVAIL;
|
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}
|
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buffer[0] = search; /* setup key */
|
|
memmove(buffer + 1, from, fromlen);
|
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key.size = fromlen + 1;
|
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key.data = (u_char *)buffer;
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|
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/* search for key */
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rv = _pw_getkey(state->db, &key, pw, buffer, buflen, NULL,
|
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state->version);
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if (rv != NS_SUCCESS) /* no match */
|
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break;
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if (pw->pw_name[0] == '+' || pw->pw_name[0] == '-') {
|
|
/* if a compat line */
|
|
if (search == _PW_KEYBYNUM)
|
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continue; /* read next if pwent */
|
|
rv = NS_NOTFOUND; /* don't match if pw{nam,uid} */
|
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break;
|
|
}
|
|
break;
|
|
}
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|
|
if (rv == NS_NOTFOUND && search == _PW_KEYBYNUM)
|
|
state->keynum = -1; /* flag `no more records' */
|
|
|
|
if (rv == NS_SUCCESS) {
|
|
if ((search == _PW_KEYBYUID && pw->pw_uid != uid) ||
|
|
(search == _PW_KEYBYNAME && strcmp(pw->pw_name, name) != 0))
|
|
rv = NS_NOTFOUND;
|
|
}
|
|
|
|
filespwscan_out:
|
|
if (rv != NS_SUCCESS && rv != NS_NOTFOUND)
|
|
*retval = errno;
|
|
return rv;
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
static int
|
|
_files_setpwent(void *nsrv, void *nscb, va_list ap)
|
|
{
|
|
|
|
_files_state.stayopen = 0;
|
|
return _files_start(&_files_state);
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
static int
|
|
_files_setpassent(void *nsrv, void *nscb, va_list ap)
|
|
{
|
|
int *retval = va_arg(ap, int *);
|
|
int stayopen = va_arg(ap, int);
|
|
|
|
int rv;
|
|
|
|
_files_state.stayopen = stayopen;
|
|
rv = _files_start(&_files_state);
|
|
*retval = (rv == NS_SUCCESS);
|
|
return rv;
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
static int
|
|
_files_endpwent(void *nsrv, void *nscb, va_list ap)
|
|
{
|
|
|
|
_files_state.stayopen = 0;
|
|
return _files_end(&_files_state);
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
static int
|
|
_files_getpwent(void *nsrv, void *nscb, va_list ap)
|
|
{
|
|
struct passwd **retval = va_arg(ap, struct passwd **);
|
|
|
|
int rv, rerror;
|
|
|
|
_DIAGASSERT(retval != NULL);
|
|
|
|
*retval = NULL;
|
|
rv = _files_pwscan(&rerror, &_files_passwd,
|
|
_files_passwdbuf, sizeof(_files_passwdbuf),
|
|
&_files_state, _PW_KEYBYNUM, NULL, 0);
|
|
if (rv == NS_SUCCESS)
|
|
*retval = &_files_passwd;
|
|
return rv;
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
static int
|
|
_files_getpwent_r(void *nsrv, void *nscb, va_list ap)
|
|
{
|
|
int *retval = va_arg(ap, int *);
|
|
struct passwd *pw = va_arg(ap, struct passwd *);
|
|
char *buffer = va_arg(ap, char *);
|
|
size_t buflen = va_arg(ap, size_t);
|
|
struct passwd **result = va_arg(ap, struct passwd **);
|
|
|
|
int rv;
|
|
|
|
_DIAGASSERT(retval != NULL);
|
|
_DIAGASSERT(pw != NULL);
|
|
_DIAGASSERT(buffer != NULL);
|
|
_DIAGASSERT(result != NULL);
|
|
|
|
rv = _files_pwscan(retval, pw, buffer, buflen, &_files_state,
|
|
_PW_KEYBYNUM, NULL, 0);
|
|
if (rv == NS_SUCCESS)
|
|
*result = pw;
|
|
else
|
|
*result = NULL;
|
|
return rv;
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
static int
|
|
_files_getpwnam(void *nsrv, void *nscb, va_list ap)
|
|
{
|
|
struct passwd **retval = va_arg(ap, struct passwd **);
|
|
const char *name = va_arg(ap, const char *);
|
|
|
|
int rv, rerror;
|
|
|
|
_DIAGASSERT(retval != NULL);
|
|
|
|
*retval = NULL;
|
|
rv = _files_start(&_files_state);
|
|
if (rv != NS_SUCCESS)
|
|
return rv;
|
|
rv = _files_pwscan(&rerror, &_files_passwd,
|
|
_files_passwdbuf, sizeof(_files_passwdbuf),
|
|
&_files_state, _PW_KEYBYNAME, name, 0);
|
|
if (!_files_state.stayopen)
|
|
_files_end(&_files_state);
|
|
if (rv == NS_SUCCESS)
|
|
*retval = &_files_passwd;
|
|
return rv;
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
static int
|
|
_files_getpwnam_r(void *nsrv, void *nscb, va_list ap)
|
|
{
|
|
int *retval = va_arg(ap, int *);
|
|
const char *name = va_arg(ap, const char *);
|
|
struct passwd *pw = va_arg(ap, struct passwd *);
|
|
char *buffer = va_arg(ap, char *);
|
|
size_t buflen = va_arg(ap, size_t);
|
|
struct passwd **result = va_arg(ap, struct passwd **);
|
|
|
|
struct files_state state;
|
|
int rv;
|
|
|
|
_DIAGASSERT(retval != NULL);
|
|
_DIAGASSERT(pw != NULL);
|
|
_DIAGASSERT(buffer != NULL);
|
|
_DIAGASSERT(result != NULL);
|
|
|
|
*result = NULL;
|
|
memset(&state, 0, sizeof(state));
|
|
rv = _files_pwscan(retval, pw, buffer, buflen, &state,
|
|
_PW_KEYBYNAME, name, 0);
|
|
_files_end(&state);
|
|
if (rv == NS_SUCCESS)
|
|
*result = pw;
|
|
return rv;
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
static int
|
|
_files_getpwuid(void *nsrv, void *nscb, va_list ap)
|
|
{
|
|
struct passwd **retval = va_arg(ap, struct passwd **);
|
|
uid_t uid = va_arg(ap, uid_t);
|
|
|
|
int rv, rerror;
|
|
|
|
_DIAGASSERT(retval != NULL);
|
|
|
|
*retval = NULL;
|
|
rv = _files_start(&_files_state);
|
|
if (rv != NS_SUCCESS)
|
|
return rv;
|
|
rv = _files_pwscan(&rerror, &_files_passwd,
|
|
_files_passwdbuf, sizeof(_files_passwdbuf),
|
|
&_files_state, _PW_KEYBYUID, NULL, uid);
|
|
if (!_files_state.stayopen)
|
|
_files_end(&_files_state);
|
|
if (rv == NS_SUCCESS)
|
|
*retval = &_files_passwd;
|
|
return rv;
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
static int
|
|
_files_getpwuid_r(void *nsrv, void *nscb, va_list ap)
|
|
{
|
|
int *retval = va_arg(ap, int *);
|
|
uid_t uid = va_arg(ap, uid_t);
|
|
struct passwd *pw = va_arg(ap, struct passwd *);
|
|
char *buffer = va_arg(ap, char *);
|
|
size_t buflen = va_arg(ap, size_t);
|
|
struct passwd **result = va_arg(ap, struct passwd **);
|
|
|
|
struct files_state state;
|
|
int rv;
|
|
|
|
_DIAGASSERT(retval != NULL);
|
|
_DIAGASSERT(pw != NULL);
|
|
_DIAGASSERT(buffer != NULL);
|
|
_DIAGASSERT(result != NULL);
|
|
|
|
*result = NULL;
|
|
memset(&state, 0, sizeof(state));
|
|
rv = _files_pwscan(retval, pw, buffer, buflen, &state,
|
|
_PW_KEYBYUID, NULL, uid);
|
|
_files_end(&state);
|
|
if (rv == NS_SUCCESS)
|
|
*result = pw;
|
|
return rv;
|
|
}
|
|
|
|
|
|
#ifdef HESIOD
|
|
/*
|
|
* dns methods
|
|
*/
|
|
|
|
/* state shared between dns methods */
|
|
struct dns_state {
|
|
int stayopen; /* see getpassent(3) */
|
|
void *context; /* Hesiod context */
|
|
int num; /* passwd index, -1 if no more */
|
|
};
|
|
|
|
static struct dns_state _dns_state;
|
|
/* storage for non _r functions */
|
|
static struct passwd _dns_passwd;
|
|
static char _dns_passwdbuf[_GETPW_R_SIZE_MAX];
|
|
|
|
static int
|
|
_dns_start(struct dns_state *state)
|
|
{
|
|
|
|
_DIAGASSERT(state != NULL);
|
|
|
|
state->num = 0;
|
|
if (state->context == NULL) { /* setup Hesiod */
|
|
if (hesiod_init(&state->context) == -1)
|
|
return NS_UNAVAIL;
|
|
}
|
|
|
|
return NS_SUCCESS;
|
|
}
|
|
|
|
static int
|
|
_dns_end(struct dns_state *state)
|
|
{
|
|
|
|
_DIAGASSERT(state != NULL);
|
|
|
|
state->num = 0;
|
|
if (state->context) {
|
|
hesiod_end(state->context);
|
|
state->context = NULL;
|
|
}
|
|
return NS_SUCCESS;
|
|
}
|
|
|
|
/*
|
|
* _dns_pwscan
|
|
* Look for the Hesiod name provided in buffer in the NULL-terminated
|
|
* list of zones,
|
|
* and decode into pw/buffer/buflen.
|
|
*/
|
|
static int
|
|
_dns_pwscan(int *retval, struct passwd *pw, char *buffer, size_t buflen,
|
|
struct dns_state *state, const char **zones)
|
|
{
|
|
const char **curzone;
|
|
char **hp, *ep;
|
|
int rv;
|
|
|
|
_DIAGASSERT(retval != NULL);
|
|
_DIAGASSERT(pw != NULL);
|
|
_DIAGASSERT(buffer != NULL);
|
|
_DIAGASSERT(state != NULL);
|
|
_DIAGASSERT(zones != NULL);
|
|
|
|
*retval = 0;
|
|
|
|
if (state->context == NULL) { /* only start if Hesiod not setup */
|
|
rv = _dns_start(state);
|
|
if (rv != NS_SUCCESS)
|
|
return rv;
|
|
}
|
|
|
|
hp = NULL;
|
|
rv = NS_NOTFOUND;
|
|
|
|
for (curzone = zones; *curzone; curzone++) { /* search zones */
|
|
hp = hesiod_resolve(state->context, buffer, *curzone);
|
|
if (hp != NULL)
|
|
break;
|
|
if (errno != ENOENT) {
|
|
rv = NS_UNAVAIL;
|
|
goto dnspwscan_out;
|
|
}
|
|
}
|
|
if (*curzone == NULL)
|
|
goto dnspwscan_out;
|
|
|
|
if ((ep = strchr(hp[0], '\n')) != NULL)
|
|
*ep = '\0'; /* clear trailing \n */
|
|
if (_pw_parse(hp[0], pw, buffer, buflen, 1)) /* validate line */
|
|
rv = NS_SUCCESS;
|
|
else
|
|
rv = NS_UNAVAIL;
|
|
|
|
dnspwscan_out:
|
|
if (rv != NS_SUCCESS && rv != NS_NOTFOUND)
|
|
*retval = errno;
|
|
if (hp)
|
|
hesiod_free_list(state->context, hp);
|
|
return rv;
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
static int
|
|
_dns_setpwent(void *nsrv, void *nscb, va_list ap)
|
|
{
|
|
|
|
_dns_state.stayopen = 0;
|
|
return _dns_start(&_dns_state);
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
static int
|
|
_dns_setpassent(void *nsrv, void *nscb, va_list ap)
|
|
{
|
|
int *retval = va_arg(ap, int *);
|
|
int stayopen = va_arg(ap, int);
|
|
|
|
int rv;
|
|
|
|
_dns_state.stayopen = stayopen;
|
|
rv = _dns_start(&_dns_state);
|
|
*retval = (rv == NS_SUCCESS);
|
|
return rv;
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
static int
|
|
_dns_endpwent(void *nsrv, void *nscb, va_list ap)
|
|
{
|
|
|
|
_dns_state.stayopen = 0;
|
|
return _dns_end(&_dns_state);
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
static int
|
|
_dns_getpwent(void *nsrv, void *nscb, va_list ap)
|
|
{
|
|
struct passwd **retval = va_arg(ap, struct passwd **);
|
|
|
|
char **hp, *ep;
|
|
int rv;
|
|
|
|
_DIAGASSERT(retval != NULL);
|
|
|
|
*retval = NULL;
|
|
|
|
if (_dns_state.num == -1) /* exhausted search */
|
|
return NS_NOTFOUND;
|
|
|
|
if (_dns_state.context == NULL) {
|
|
/* only start if Hesiod not setup */
|
|
rv = _dns_start(&_dns_state);
|
|
if (rv != NS_SUCCESS)
|
|
return rv;
|
|
}
|
|
|
|
next_dns_entry:
|
|
hp = NULL;
|
|
rv = NS_NOTFOUND;
|
|
|
|
/* find passwd-NNN */
|
|
snprintf(_dns_passwdbuf, sizeof(_dns_passwdbuf),
|
|
"passwd-%u", _dns_state.num);
|
|
_dns_state.num++;
|
|
|
|
hp = hesiod_resolve(_dns_state.context, _dns_passwdbuf, "passwd");
|
|
if (hp == NULL) {
|
|
if (errno == ENOENT)
|
|
_dns_state.num = -1;
|
|
else
|
|
rv = NS_UNAVAIL;
|
|
} else {
|
|
if ((ep = strchr(hp[0], '\n')) != NULL)
|
|
*ep = '\0'; /* clear trailing \n */
|
|
/* validate line */
|
|
if (_pw_parse(hp[0], &_dns_passwd,
|
|
_dns_passwdbuf, sizeof(_dns_passwdbuf), 1))
|
|
rv = NS_SUCCESS;
|
|
else { /* dodgy entry, try again */
|
|
hesiod_free_list(_dns_state.context, hp);
|
|
goto next_dns_entry;
|
|
}
|
|
}
|
|
|
|
if (hp)
|
|
hesiod_free_list(_dns_state.context, hp);
|
|
if (rv == NS_SUCCESS)
|
|
*retval = &_dns_passwd;
|
|
return rv;
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
static int
|
|
_dns_getpwent_r(void *nsrv, void *nscb, va_list ap)
|
|
{
|
|
int *retval = va_arg(ap, int *);
|
|
struct passwd *pw = va_arg(ap, struct passwd *);
|
|
char *buffer = va_arg(ap, char *);
|
|
size_t buflen = va_arg(ap, size_t);
|
|
struct passwd **result = va_arg(ap, struct passwd **);
|
|
|
|
char **hp, *ep;
|
|
int rv;
|
|
|
|
_DIAGASSERT(retval != NULL);
|
|
_DIAGASSERT(pw != NULL);
|
|
_DIAGASSERT(buffer != NULL);
|
|
_DIAGASSERT(result != NULL);
|
|
|
|
*retval = 0;
|
|
|
|
if (_dns_state.num == -1) /* exhausted search */
|
|
return NS_NOTFOUND;
|
|
|
|
if (_dns_state.context == NULL) {
|
|
/* only start if Hesiod not setup */
|
|
rv = _dns_start(&_dns_state);
|
|
if (rv != NS_SUCCESS)
|
|
return rv;
|
|
}
|
|
|
|
next_dns_entry:
|
|
hp = NULL;
|
|
rv = NS_NOTFOUND;
|
|
|
|
/* find passwd-NNN */
|
|
snprintf(buffer, buflen, "passwd-%u", _dns_state.num);
|
|
_dns_state.num++;
|
|
|
|
hp = hesiod_resolve(_dns_state.context, buffer, "passwd");
|
|
if (hp == NULL) {
|
|
if (errno == ENOENT)
|
|
_dns_state.num = -1;
|
|
else
|
|
rv = NS_UNAVAIL;
|
|
} else {
|
|
if ((ep = strchr(hp[0], '\n')) != NULL)
|
|
*ep = '\0'; /* clear trailing \n */
|
|
/* validate line */
|
|
if (_pw_parse(hp[0], pw, buffer, buflen, 1))
|
|
rv = NS_SUCCESS;
|
|
else { /* dodgy entry, try again */
|
|
hesiod_free_list(_dns_state.context, hp);
|
|
goto next_dns_entry;
|
|
}
|
|
}
|
|
|
|
if (hp)
|
|
hesiod_free_list(_dns_state.context, hp);
|
|
if (rv == NS_SUCCESS)
|
|
*result = pw;
|
|
else
|
|
*result = NULL;
|
|
return rv;
|
|
}
|
|
|
|
static const char *_dns_uid_zones[] = {
|
|
"uid",
|
|
"passwd",
|
|
NULL
|
|
};
|
|
|
|
/*ARGSUSED*/
|
|
static int
|
|
_dns_getpwuid(void *nsrv, void *nscb, va_list ap)
|
|
{
|
|
struct passwd **retval = va_arg(ap, struct passwd **);
|
|
uid_t uid = va_arg(ap, uid_t);
|
|
|
|
int rv, rerror;
|
|
|
|
_DIAGASSERT(retval != NULL);
|
|
|
|
*retval = NULL;
|
|
rv = _dns_start(&_dns_state);
|
|
if (rv != NS_SUCCESS)
|
|
return rv;
|
|
snprintf(_dns_passwdbuf, sizeof(_dns_passwdbuf),
|
|
"%u", (unsigned int)uid);
|
|
rv = _dns_pwscan(&rerror, &_dns_passwd,
|
|
_dns_passwdbuf, sizeof(_dns_passwdbuf),
|
|
&_dns_state, _dns_uid_zones);
|
|
if (!_dns_state.stayopen)
|
|
_dns_end(&_dns_state);
|
|
if (rv == NS_SUCCESS && uid == _dns_passwd.pw_uid)
|
|
*retval = &_dns_passwd;
|
|
return rv;
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
static int
|
|
_dns_getpwuid_r(void *nsrv, void *nscb, va_list ap)
|
|
{
|
|
int *retval = va_arg(ap, int *);
|
|
uid_t uid = va_arg(ap, uid_t);
|
|
struct passwd *pw = va_arg(ap, struct passwd *);
|
|
char *buffer = va_arg(ap, char *);
|
|
size_t buflen = va_arg(ap, size_t);
|
|
struct passwd **result = va_arg(ap, struct passwd **);
|
|
|
|
struct dns_state state;
|
|
int rv;
|
|
|
|
_DIAGASSERT(retval != NULL);
|
|
_DIAGASSERT(pw != NULL);
|
|
_DIAGASSERT(buffer != NULL);
|
|
_DIAGASSERT(result != NULL);
|
|
|
|
*result = NULL;
|
|
memset(&state, 0, sizeof(state));
|
|
snprintf(buffer, buflen, "%u", (unsigned int)uid);
|
|
rv = _dns_pwscan(retval, pw, buffer, buflen, &state, _dns_uid_zones);
|
|
_dns_end(&state);
|
|
if (rv != NS_SUCCESS)
|
|
return rv;
|
|
if (uid == pw->pw_uid) {
|
|
*result = pw;
|
|
return NS_SUCCESS;
|
|
} else
|
|
return NS_NOTFOUND;
|
|
}
|
|
|
|
static const char *_dns_nam_zones[] = {
|
|
"passwd",
|
|
NULL
|
|
};
|
|
|
|
/*ARGSUSED*/
|
|
static int
|
|
_dns_getpwnam(void *nsrv, void *nscb, va_list ap)
|
|
{
|
|
struct passwd **retval = va_arg(ap, struct passwd **);
|
|
const char *name = va_arg(ap, const char *);
|
|
|
|
int rv, rerror;
|
|
|
|
_DIAGASSERT(retval != NULL);
|
|
|
|
*retval = NULL;
|
|
rv = _dns_start(&_dns_state);
|
|
if (rv != NS_SUCCESS)
|
|
return rv;
|
|
snprintf(_dns_passwdbuf, sizeof(_dns_passwdbuf), "%s", name);
|
|
rv = _dns_pwscan(&rerror, &_dns_passwd,
|
|
_dns_passwdbuf, sizeof(_dns_passwdbuf),
|
|
&_dns_state, _dns_nam_zones);
|
|
if (!_dns_state.stayopen)
|
|
_dns_end(&_dns_state);
|
|
if (rv == NS_SUCCESS && strcmp(name, _dns_passwd.pw_name) == 0)
|
|
*retval = &_dns_passwd;
|
|
return rv;
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
static int
|
|
_dns_getpwnam_r(void *nsrv, void *nscb, va_list ap)
|
|
{
|
|
int *retval = va_arg(ap, int *);
|
|
const char *name = va_arg(ap, const char *);
|
|
struct passwd *pw = va_arg(ap, struct passwd *);
|
|
char *buffer = va_arg(ap, char *);
|
|
size_t buflen = va_arg(ap, size_t);
|
|
struct passwd **result = va_arg(ap, struct passwd **);
|
|
|
|
struct dns_state state;
|
|
int rv;
|
|
|
|
_DIAGASSERT(retval != NULL);
|
|
_DIAGASSERT(pw != NULL);
|
|
_DIAGASSERT(buffer != NULL);
|
|
_DIAGASSERT(result != NULL);
|
|
|
|
*result = NULL;
|
|
memset(&state, 0, sizeof(state));
|
|
snprintf(buffer, buflen, "%s", name);
|
|
rv = _dns_pwscan(retval, pw, buffer, buflen, &state, _dns_nam_zones);
|
|
_dns_end(&state);
|
|
if (rv != NS_SUCCESS)
|
|
return rv;
|
|
if (strcmp(name, pw->pw_name) == 0) {
|
|
*result = pw;
|
|
return NS_SUCCESS;
|
|
} else
|
|
return NS_NOTFOUND;
|
|
}
|
|
|
|
#endif /* HESIOD */
|
|
|
|
|
|
#ifdef YP
|
|
/*
|
|
* nis methods
|
|
*/
|
|
/* state shared between nis methods */
|
|
struct nis_state {
|
|
int stayopen; /* see getpassent(3) */
|
|
char *domain; /* NIS domain */
|
|
int done; /* non-zero if search exhausted */
|
|
char *current; /* current first/next match */
|
|
int currentlen; /* length of _nis_current */
|
|
enum { /* shadow map type */
|
|
NISMAP_UNKNOWN, /* unknown ... */
|
|
NISMAP_NONE, /* none: use "passwd.by*" */
|
|
NISMAP_ADJUNCT, /* pw_passwd from "passwd.adjunct.*" */
|
|
NISMAP_MASTER /* all from "master.passwd.by*" */
|
|
} maptype;
|
|
};
|
|
|
|
static struct nis_state _nis_state;
|
|
/* storage for non _r functions */
|
|
static struct passwd _nis_passwd;
|
|
static char _nis_passwdbuf[_GETPW_R_SIZE_MAX];
|
|
|
|
/* macros for deciding which NIS maps to use. */
|
|
#define PASSWD_BYNAME(x) ((x)->maptype == NISMAP_MASTER \
|
|
? "master.passwd.byname" : "passwd.byname")
|
|
#define PASSWD_BYUID(x) ((x)->maptype == NISMAP_MASTER \
|
|
? "master.passwd.byuid" : "passwd.byuid")
|
|
|
|
static int
|
|
_nis_start(struct nis_state *state)
|
|
{
|
|
|
|
_DIAGASSERT(state != NULL);
|
|
|
|
state->done = 0;
|
|
if (state->current) {
|
|
free(state->current);
|
|
state->current = NULL;
|
|
}
|
|
if (state->domain == NULL) { /* setup NIS */
|
|
switch (yp_get_default_domain(&state->domain)) {
|
|
case 0:
|
|
break;
|
|
case YPERR_RESRC:
|
|
return NS_TRYAGAIN;
|
|
default:
|
|
return NS_UNAVAIL;
|
|
}
|
|
}
|
|
|
|
/* determine where to get pw_passwd from */
|
|
if (state->maptype == NISMAP_UNKNOWN) {
|
|
int r, order;
|
|
|
|
state->maptype = NISMAP_NONE; /* default to no adjunct */
|
|
if (geteuid() != 0) /* non-root can't use adjunct */
|
|
return NS_SUCCESS;
|
|
|
|
/* look for "master.passwd.*" */
|
|
r = yp_order(state->domain, "master.passwd.byname", &order);
|
|
if (r == 0) {
|
|
state->maptype = NISMAP_MASTER;
|
|
return NS_SUCCESS;
|
|
}
|
|
|
|
/* master.passwd doesn't exist, try passwd.adjunct */
|
|
if (r == YPERR_MAP) {
|
|
r = yp_order(state->domain, "passwd.adjunct.byname",
|
|
&order);
|
|
if (r == 0)
|
|
state->maptype = NISMAP_ADJUNCT;
|
|
}
|
|
}
|
|
return NS_SUCCESS;
|
|
}
|
|
|
|
static int
|
|
_nis_end(struct nis_state *state)
|
|
{
|
|
|
|
_DIAGASSERT(state != NULL);
|
|
|
|
if (state->domain)
|
|
state->domain = NULL;
|
|
state->done = 0;
|
|
if (state->current)
|
|
free(state->current);
|
|
state->current = NULL;
|
|
state->maptype = NISMAP_UNKNOWN;
|
|
return NS_SUCCESS;
|
|
}
|
|
|
|
/*
|
|
* nis_parse
|
|
* wrapper to _pw_parse that obtains the real password from the
|
|
* "passwd.adjunct.byname" NIS map if the maptype is NISMAP_ADJUNCT.
|
|
*/
|
|
static int
|
|
_nis_parse(const char *entry, struct passwd *pw, char *buf, size_t buflen,
|
|
struct nis_state *state)
|
|
{
|
|
size_t elen;
|
|
|
|
_DIAGASSERT(entry != NULL);
|
|
_DIAGASSERT(pw != NULL);
|
|
_DIAGASSERT(buf != NULL);
|
|
_DIAGASSERT(state != NULL);
|
|
|
|
elen = strlen(entry);
|
|
if (elen >= buflen)
|
|
return 0;
|
|
if (! _pw_parse(entry, pw, buf, buflen,
|
|
!(state->maptype == NISMAP_MASTER)))
|
|
return 0;
|
|
|
|
if ((state->maptype == NISMAP_ADJUNCT) &&
|
|
(strstr(pw->pw_passwd, "##") != NULL)) {
|
|
char *data;
|
|
int datalen;
|
|
|
|
if (yp_match(state->domain, "passwd.adjunct.byname",
|
|
pw->pw_name, (int)strlen(pw->pw_name),
|
|
&data, &datalen) == 0) {
|
|
char *bp, *ep;
|
|
/* skip name to get password */
|
|
ep = data;
|
|
if ((bp = strsep(&ep, ":")) != NULL &&
|
|
(bp = strsep(&ep, ":")) != NULL) {
|
|
/* store new pw_passwd after entry */
|
|
strlcpy(buf + elen, bp, buflen - elen);
|
|
pw->pw_passwd = &buf[elen];
|
|
}
|
|
free(data);
|
|
}
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
|
|
/*
|
|
* _nis_pwscan
|
|
* Look for the yp key provided in buffer from map,
|
|
* and decode into pw/buffer/buflen.
|
|
*/
|
|
static int
|
|
_nis_pwscan(int *retval, struct passwd *pw, char *buffer, size_t buflen,
|
|
struct nis_state *state, const char *map)
|
|
{
|
|
char *data;
|
|
int nisr, rv, datalen;
|
|
|
|
_DIAGASSERT(retval != NULL);
|
|
_DIAGASSERT(pw != NULL);
|
|
_DIAGASSERT(buffer != NULL);
|
|
_DIAGASSERT(state != NULL);
|
|
_DIAGASSERT(map != NULL);
|
|
|
|
*retval = 0;
|
|
|
|
if (state->domain == NULL) { /* only start if NIS not setup */
|
|
rv = _nis_start(state);
|
|
if (rv != NS_SUCCESS)
|
|
return rv;
|
|
}
|
|
|
|
data = NULL;
|
|
rv = NS_NOTFOUND;
|
|
|
|
/* search map */
|
|
nisr = yp_match(state->domain, map, buffer, (int)strlen(buffer),
|
|
&data, &datalen);
|
|
switch (nisr) {
|
|
case 0:
|
|
data[datalen] = '\0'; /* clear trailing \n */
|
|
if (_nis_parse(data, pw, buffer, buflen, state))
|
|
rv = NS_SUCCESS; /* validate line */
|
|
else
|
|
rv = NS_UNAVAIL;
|
|
break;
|
|
case YPERR_KEY:
|
|
break;
|
|
default:
|
|
rv = NS_UNAVAIL;
|
|
break;
|
|
}
|
|
|
|
if (rv != NS_SUCCESS && rv != NS_NOTFOUND)
|
|
*retval = errno;
|
|
if (data)
|
|
free(data);
|
|
return rv;
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
static int
|
|
_nis_setpwent(void *nsrv, void *nscb, va_list ap)
|
|
{
|
|
|
|
_nis_state.stayopen = 0;
|
|
return _nis_start(&_nis_state);
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
static int
|
|
_nis_setpassent(void *nsrv, void *nscb, va_list ap)
|
|
{
|
|
int *retval = va_arg(ap, int *);
|
|
int stayopen = va_arg(ap, int);
|
|
|
|
int rv;
|
|
|
|
_nis_state.stayopen = stayopen;
|
|
rv = _nis_start(&_nis_state);
|
|
*retval = (rv == NS_SUCCESS);
|
|
return rv;
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
static int
|
|
_nis_endpwent(void *nsrv, void *nscb, va_list ap)
|
|
{
|
|
|
|
return _nis_end(&_nis_state);
|
|
}
|
|
|
|
|
|
/*ARGSUSED*/
|
|
static int
|
|
_nis_getpwent(void *nsrv, void *nscb, va_list ap)
|
|
{
|
|
struct passwd **retval = va_arg(ap, struct passwd **);
|
|
|
|
char *key, *data;
|
|
int keylen, datalen, rv, nisr;
|
|
|
|
_DIAGASSERT(retval != NULL);
|
|
|
|
*retval = NULL;
|
|
|
|
if (_nis_state.done) /* exhausted search */
|
|
return NS_NOTFOUND;
|
|
if (_nis_state.domain == NULL) {
|
|
/* only start if NIS not setup */
|
|
rv = _nis_start(&_nis_state);
|
|
if (rv != NS_SUCCESS)
|
|
return rv;
|
|
}
|
|
|
|
next_nis_entry:
|
|
key = NULL;
|
|
data = NULL;
|
|
rv = NS_NOTFOUND;
|
|
|
|
if (_nis_state.current) { /* already searching */
|
|
nisr = yp_next(_nis_state.domain, PASSWD_BYNAME(&_nis_state),
|
|
_nis_state.current, _nis_state.currentlen,
|
|
&key, &keylen, &data, &datalen);
|
|
free(_nis_state.current);
|
|
_nis_state.current = NULL;
|
|
switch (nisr) {
|
|
case 0:
|
|
_nis_state.current = key;
|
|
_nis_state.currentlen = keylen;
|
|
key = NULL;
|
|
break;
|
|
case YPERR_NOMORE:
|
|
_nis_state.done = 1;
|
|
goto nisent_out;
|
|
default:
|
|
rv = NS_UNAVAIL;
|
|
goto nisent_out;
|
|
}
|
|
} else { /* new search */
|
|
if (yp_first(_nis_state.domain, PASSWD_BYNAME(&_nis_state),
|
|
&_nis_state.current, &_nis_state.currentlen,
|
|
&data, &datalen)) {
|
|
rv = NS_UNAVAIL;
|
|
goto nisent_out;
|
|
}
|
|
}
|
|
|
|
data[datalen] = '\0'; /* clear trailing \n */
|
|
/* validate line */
|
|
if (_nis_parse(data, &_nis_passwd,
|
|
_nis_passwdbuf, sizeof(_nis_passwdbuf), &_nis_state))
|
|
rv = NS_SUCCESS;
|
|
else { /* dodgy entry, try again */
|
|
free(data);
|
|
goto next_nis_entry;
|
|
}
|
|
|
|
nisent_out:
|
|
if (key)
|
|
free(key);
|
|
if (data)
|
|
free(data);
|
|
if (rv == NS_SUCCESS)
|
|
*retval = &_nis_passwd;
|
|
return rv;
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
static int
|
|
_nis_getpwent_r(void *nsrv, void *nscb, va_list ap)
|
|
{
|
|
int *retval = va_arg(ap, int *);
|
|
struct passwd *pw = va_arg(ap, struct passwd *);
|
|
char *buffer = va_arg(ap, char *);
|
|
size_t buflen = va_arg(ap, size_t);
|
|
struct passwd **result = va_arg(ap, struct passwd **);
|
|
|
|
char *key, *data;
|
|
int keylen, datalen, rv, nisr;
|
|
|
|
_DIAGASSERT(retval != NULL);
|
|
_DIAGASSERT(pw != NULL);
|
|
_DIAGASSERT(buffer != NULL);
|
|
_DIAGASSERT(result != NULL);
|
|
|
|
*retval = 0;
|
|
|
|
if (_nis_state.done) /* exhausted search */
|
|
return NS_NOTFOUND;
|
|
if (_nis_state.domain == NULL) {
|
|
/* only start if NIS not setup */
|
|
rv = _nis_start(&_nis_state);
|
|
if (rv != NS_SUCCESS)
|
|
return rv;
|
|
}
|
|
|
|
next_nis_entry:
|
|
key = NULL;
|
|
data = NULL;
|
|
rv = NS_NOTFOUND;
|
|
|
|
if (_nis_state.current) { /* already searching */
|
|
nisr = yp_next(_nis_state.domain, PASSWD_BYNAME(&_nis_state),
|
|
_nis_state.current, _nis_state.currentlen,
|
|
&key, &keylen, &data, &datalen);
|
|
free(_nis_state.current);
|
|
_nis_state.current = NULL;
|
|
switch (nisr) {
|
|
case 0:
|
|
_nis_state.current = key;
|
|
_nis_state.currentlen = keylen;
|
|
key = NULL;
|
|
break;
|
|
case YPERR_NOMORE:
|
|
_nis_state.done = 1;
|
|
goto nisent_out;
|
|
default:
|
|
rv = NS_UNAVAIL;
|
|
goto nisent_out;
|
|
}
|
|
} else { /* new search */
|
|
if (yp_first(_nis_state.domain, PASSWD_BYNAME(&_nis_state),
|
|
&_nis_state.current, &_nis_state.currentlen,
|
|
&data, &datalen)) {
|
|
rv = NS_UNAVAIL;
|
|
goto nisent_out;
|
|
}
|
|
}
|
|
|
|
data[datalen] = '\0'; /* clear trailing \n */
|
|
/* validate line */
|
|
if (_nis_parse(data, pw, buffer, buflen, &_nis_state))
|
|
rv = NS_SUCCESS;
|
|
else { /* dodgy entry, try again */
|
|
if (key)
|
|
free(key);
|
|
free(data);
|
|
goto next_nis_entry;
|
|
}
|
|
|
|
nisent_out:
|
|
if (key)
|
|
free(key);
|
|
if (data)
|
|
free(data);
|
|
if (rv == NS_SUCCESS)
|
|
*result = pw;
|
|
else
|
|
*result = NULL;
|
|
return rv;
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
static int
|
|
_nis_getpwuid(void *nsrv, void *nscb, va_list ap)
|
|
{
|
|
struct passwd **retval = va_arg(ap, struct passwd **);
|
|
uid_t uid = va_arg(ap, uid_t);
|
|
|
|
int rv, rerror;
|
|
|
|
_DIAGASSERT(retval != NULL);
|
|
|
|
*retval = NULL;
|
|
rv = _nis_start(&_nis_state);
|
|
if (rv != NS_SUCCESS)
|
|
return rv;
|
|
snprintf(_nis_passwdbuf, sizeof(_nis_passwdbuf), "%u", (unsigned int)uid);
|
|
rv = _nis_pwscan(&rerror, &_nis_passwd,
|
|
_nis_passwdbuf, sizeof(_nis_passwdbuf),
|
|
&_nis_state, PASSWD_BYUID(&_nis_state));
|
|
if (!_nis_state.stayopen)
|
|
_nis_end(&_nis_state);
|
|
if (rv == NS_SUCCESS && uid == _nis_passwd.pw_uid)
|
|
*retval = &_nis_passwd;
|
|
return rv;
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
static int
|
|
_nis_getpwuid_r(void *nsrv, void *nscb, va_list ap)
|
|
{
|
|
int *retval = va_arg(ap, int *);
|
|
uid_t uid = va_arg(ap, uid_t);
|
|
struct passwd *pw = va_arg(ap, struct passwd *);
|
|
char *buffer = va_arg(ap, char *);
|
|
size_t buflen = va_arg(ap, size_t);
|
|
struct passwd **result = va_arg(ap, struct passwd **);
|
|
|
|
struct nis_state state;
|
|
int rv;
|
|
|
|
_DIAGASSERT(retval != NULL);
|
|
_DIAGASSERT(pw != NULL);
|
|
_DIAGASSERT(buffer != NULL);
|
|
_DIAGASSERT(result != NULL);
|
|
|
|
*result = NULL;
|
|
memset(&state, 0, sizeof(state));
|
|
rv = _nis_start(&state);
|
|
if (rv != NS_SUCCESS)
|
|
return rv;
|
|
snprintf(buffer, buflen, "%u", (unsigned int)uid);
|
|
rv = _nis_pwscan(retval, pw, buffer, buflen,
|
|
&state, PASSWD_BYUID(&state));
|
|
_nis_end(&state);
|
|
if (rv != NS_SUCCESS)
|
|
return rv;
|
|
if (uid == pw->pw_uid) {
|
|
*result = pw;
|
|
return NS_SUCCESS;
|
|
} else
|
|
return NS_NOTFOUND;
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
static int
|
|
_nis_getpwnam(void *nsrv, void *nscb, va_list ap)
|
|
{
|
|
struct passwd **retval = va_arg(ap, struct passwd **);
|
|
const char *name = va_arg(ap, const char *);
|
|
|
|
int rv, rerror;
|
|
|
|
_DIAGASSERT(retval != NULL);
|
|
|
|
*retval = NULL;
|
|
rv = _nis_start(&_nis_state);
|
|
if (rv != NS_SUCCESS)
|
|
return rv;
|
|
snprintf(_nis_passwdbuf, sizeof(_nis_passwdbuf), "%s", name);
|
|
rv = _nis_pwscan(&rerror, &_nis_passwd,
|
|
_nis_passwdbuf, sizeof(_nis_passwdbuf),
|
|
&_nis_state, PASSWD_BYNAME(&_nis_state));
|
|
if (!_nis_state.stayopen)
|
|
_nis_end(&_nis_state);
|
|
if (rv == NS_SUCCESS && strcmp(name, _nis_passwd.pw_name) == 0)
|
|
*retval = &_nis_passwd;
|
|
return rv;
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
static int
|
|
_nis_getpwnam_r(void *nsrv, void *nscb, va_list ap)
|
|
{
|
|
int *retval = va_arg(ap, int *);
|
|
const char *name = va_arg(ap, const char *);
|
|
struct passwd *pw = va_arg(ap, struct passwd *);
|
|
char *buffer = va_arg(ap, char *);
|
|
size_t buflen = va_arg(ap, size_t);
|
|
struct passwd **result = va_arg(ap, struct passwd **);
|
|
|
|
struct nis_state state;
|
|
int rv;
|
|
|
|
_DIAGASSERT(retval != NULL);
|
|
_DIAGASSERT(pw != NULL);
|
|
_DIAGASSERT(buffer != NULL);
|
|
_DIAGASSERT(result != NULL);
|
|
|
|
*result = NULL;
|
|
snprintf(buffer, buflen, "%s", name);
|
|
memset(&state, 0, sizeof(state));
|
|
rv = _nis_start(&state);
|
|
if (rv != NS_SUCCESS)
|
|
return rv;
|
|
rv = _nis_pwscan(retval, pw, buffer, buflen,
|
|
&state, PASSWD_BYNAME(&state));
|
|
_nis_end(&state);
|
|
if (rv != NS_SUCCESS)
|
|
return rv;
|
|
if (strcmp(name, pw->pw_name) == 0) {
|
|
*result = pw;
|
|
return NS_SUCCESS;
|
|
} else
|
|
return NS_NOTFOUND;
|
|
}
|
|
|
|
#endif /* YP */
|
|
|
|
|
|
#ifdef _PASSWD_COMPAT
|
|
/*
|
|
* compat methods
|
|
*/
|
|
|
|
/* state shared between compat methods */
|
|
|
|
struct compat_state {
|
|
int stayopen; /* see getpassent(3) */
|
|
DB *db; /* passwd DB */
|
|
int keynum; /* key counter, -1 if no more */
|
|
enum { /* current compat mode */
|
|
COMPAT_NOTOKEN = 0, /* no compat token present */
|
|
COMPAT_NONE, /* parsing normal pwd.db line */
|
|
COMPAT_FULL, /* parsing `+' entries */
|
|
COMPAT_USER, /* parsing `+name' entries */
|
|
COMPAT_NETGROUP /* parsing `+@netgroup' entries */
|
|
} mode;
|
|
char *user; /* COMPAT_USER "+name" */
|
|
DB *exclude; /* compat exclude DB */
|
|
struct passwd proto; /* proto passwd entry */
|
|
char protobuf[_GETPW_R_SIZE_MAX];
|
|
/* buffer for proto ptrs */
|
|
int protoflags; /* proto passwd flags */
|
|
int version;
|
|
};
|
|
|
|
static struct compat_state _compat_state;
|
|
/* storage for non _r functions */
|
|
static struct passwd _compat_passwd;
|
|
static char _compat_passwdbuf[_GETPW_R_SIZE_MAX];
|
|
|
|
static int
|
|
_compat_start(struct compat_state *state)
|
|
{
|
|
int rv;
|
|
|
|
_DIAGASSERT(state != NULL);
|
|
|
|
state->keynum = 0;
|
|
if (state->db == NULL) { /* not open yet */
|
|
DBT key, data;
|
|
DBT pkey, pdata;
|
|
char bf[MAXLOGNAME];
|
|
|
|
rv = _pw_opendb(&state->db, &state->version);
|
|
if (rv != NS_SUCCESS)
|
|
return rv;
|
|
|
|
state->mode = COMPAT_NOTOKEN;
|
|
|
|
/*
|
|
* Determine if the "compat" token is present in pwd.db;
|
|
* either "__YP!" or PW_KEYBYNAME+"+".
|
|
* Only works if pwd_mkdb installs the token.
|
|
*/
|
|
key.data = (u_char *)__UNCONST(__yp_token);
|
|
key.size = strlen(__yp_token);
|
|
|
|
bf[0] = _PW_KEYBYNAME; /* Pre-token database support. */
|
|
bf[1] = '+';
|
|
pkey.data = (u_char *)bf;
|
|
pkey.size = 2;
|
|
|
|
if ((state->db->get)(state->db, &key, &data, 0) == 0
|
|
|| (state->db->get)(state->db, &pkey, &pdata, 0) == 0)
|
|
state->mode = COMPAT_NONE;
|
|
}
|
|
return NS_SUCCESS;
|
|
}
|
|
|
|
static int
|
|
_compat_end(struct compat_state *state)
|
|
{
|
|
|
|
_DIAGASSERT(state != NULL);
|
|
|
|
state->keynum = 0;
|
|
if (state->db) {
|
|
(void)(state->db->close)(state->db);
|
|
state->db = NULL;
|
|
}
|
|
state->mode = COMPAT_NOTOKEN;
|
|
if (state->user)
|
|
free(state->user);
|
|
state->user = NULL;
|
|
if (state->exclude != NULL)
|
|
(void)(state->exclude->close)(state->exclude);
|
|
state->exclude = NULL;
|
|
state->proto.pw_name = NULL;
|
|
state->protoflags = 0;
|
|
return NS_SUCCESS;
|
|
}
|
|
|
|
/*
|
|
* _compat_add_exclude
|
|
* add the name to the exclude list in state->exclude.
|
|
*/
|
|
static int
|
|
_compat_add_exclude(struct compat_state *state, const char *name)
|
|
{
|
|
DBT key, data;
|
|
|
|
_DIAGASSERT(state != NULL);
|
|
_DIAGASSERT(name != NULL);
|
|
|
|
/* initialize the exclusion table if needed */
|
|
if (state->exclude == NULL) {
|
|
state->exclude = dbopen(NULL, O_RDWR, 600, DB_HASH, NULL);
|
|
if (state->exclude == NULL)
|
|
return 0;
|
|
}
|
|
|
|
key.size = strlen(name); /* set up the key */
|
|
key.data = (u_char *)__UNCONST(name);
|
|
|
|
data.data = NULL; /* data is nothing */
|
|
data.size = 0;
|
|
|
|
/* store it */
|
|
if ((state->exclude->put)(state->exclude, &key, &data, 0) == -1)
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* _compat_is_excluded
|
|
* test if a name is on the compat mode exclude list
|
|
*/
|
|
static int
|
|
_compat_is_excluded(struct compat_state *state, const char *name)
|
|
{
|
|
DBT key, data;
|
|
|
|
_DIAGASSERT(state != NULL);
|
|
_DIAGASSERT(name != NULL);
|
|
|
|
if (state->exclude == NULL)
|
|
return 0; /* nothing excluded */
|
|
|
|
key.size = strlen(name); /* set up the key */
|
|
key.data = (u_char *)__UNCONST(name);
|
|
|
|
if ((state->exclude->get)(state->exclude, &key, &data, 0) == 0)
|
|
return 1; /* is excluded */
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* _passwdcompat_bad
|
|
* log an error if "files" or "compat" is specified in
|
|
* passwd_compat database
|
|
*/
|
|
/*ARGSUSED*/
|
|
static int
|
|
_passwdcompat_bad(void *nsrv, void *nscb, va_list ap)
|
|
{
|
|
static int warned;
|
|
|
|
_DIAGASSERT(nsrv != NULL);
|
|
_DIAGASSERT(nscb != NULL);
|
|
|
|
if (!warned) {
|
|
syslog(LOG_ERR,
|
|
"nsswitch.conf passwd_compat database can't use '%s'",
|
|
(char *)nscb);
|
|
}
|
|
warned = 1;
|
|
return NS_UNAVAIL;
|
|
}
|
|
|
|
/*
|
|
* _passwdcompat_setpassent
|
|
* Call setpassent for all passwd_compat sources.
|
|
*/
|
|
static int
|
|
_passwdcompat_setpassent(int stayopen)
|
|
{
|
|
static const ns_dtab dtab[] = {
|
|
NS_FILES_CB(_passwdcompat_bad, "files")
|
|
NS_DNS_CB(_dns_setpassent, NULL)
|
|
NS_NIS_CB(_nis_setpassent, NULL)
|
|
NS_COMPAT_CB(_passwdcompat_bad, "compat")
|
|
NS_NULL_CB
|
|
};
|
|
|
|
int rv, result;
|
|
|
|
rv = nsdispatch(NULL, dtab, NSDB_PASSWD_COMPAT, "setpassent",
|
|
__nsdefaultnis_forceall, &result, stayopen);
|
|
return rv;
|
|
}
|
|
|
|
/*
|
|
* _passwdcompat_endpwent
|
|
* Call endpwent for all passwd_compat sources.
|
|
*/
|
|
static int
|
|
_passwdcompat_endpwent(void)
|
|
{
|
|
static const ns_dtab dtab[] = {
|
|
NS_FILES_CB(_passwdcompat_bad, "files")
|
|
NS_DNS_CB(_dns_endpwent, NULL)
|
|
NS_NIS_CB(_nis_endpwent, NULL)
|
|
NS_COMPAT_CB(_passwdcompat_bad, "compat")
|
|
NS_NULL_CB
|
|
};
|
|
|
|
return nsdispatch(NULL, dtab, NSDB_PASSWD_COMPAT, "endpwent",
|
|
__nsdefaultnis_forceall);
|
|
}
|
|
|
|
/*
|
|
* _passwdcompat_pwscan
|
|
* When a name lookup in compat mode is required (e.g., `+name', or a
|
|
* name in `+@netgroup'), look it up in the 'passwd_compat' nsswitch
|
|
* database.
|
|
* Fail if passwd_compat contains files or compat.
|
|
*/
|
|
static int
|
|
_passwdcompat_pwscan(struct passwd *pw, char *buffer, size_t buflen,
|
|
int search, const char *name, uid_t uid)
|
|
{
|
|
static const ns_dtab compatentdtab[] = {
|
|
NS_FILES_CB(_passwdcompat_bad, "files")
|
|
NS_DNS_CB(_dns_getpwent_r, NULL)
|
|
NS_NIS_CB(_nis_getpwent_r, NULL)
|
|
NS_COMPAT_CB(_passwdcompat_bad, "compat")
|
|
NS_NULL_CB
|
|
};
|
|
static const ns_dtab compatuiddtab[] = {
|
|
NS_FILES_CB(_passwdcompat_bad, "files")
|
|
NS_DNS_CB(_dns_getpwuid_r, NULL)
|
|
NS_NIS_CB(_nis_getpwuid_r, NULL)
|
|
NS_COMPAT_CB(_passwdcompat_bad, "compat")
|
|
NS_NULL_CB
|
|
};
|
|
static const ns_dtab compatnamdtab[] = {
|
|
NS_FILES_CB(_passwdcompat_bad, "files")
|
|
NS_DNS_CB(_dns_getpwnam_r, NULL)
|
|
NS_NIS_CB(_nis_getpwnam_r, NULL)
|
|
NS_COMPAT_CB(_passwdcompat_bad, "compat")
|
|
NS_NULL_CB
|
|
};
|
|
|
|
int rv, crv;
|
|
struct passwd *cpw;
|
|
|
|
switch (search) {
|
|
case _PW_KEYBYNUM:
|
|
rv = nsdispatch(NULL, compatentdtab,
|
|
NSDB_PASSWD_COMPAT, "getpwent_r", __nsdefaultnis,
|
|
&crv, pw, buffer, buflen, &cpw);
|
|
break;
|
|
case _PW_KEYBYNAME:
|
|
_DIAGASSERT(name != NULL);
|
|
rv = nsdispatch(NULL, compatnamdtab,
|
|
NSDB_PASSWD_COMPAT, "getpwnam_r", __nsdefaultnis,
|
|
&crv, name, pw, buffer, buflen, &cpw);
|
|
break;
|
|
case _PW_KEYBYUID:
|
|
rv = nsdispatch(NULL, compatuiddtab,
|
|
NSDB_PASSWD_COMPAT, "getpwuid_r", __nsdefaultnis,
|
|
&crv, uid, pw, buffer, buflen, &cpw);
|
|
break;
|
|
default:
|
|
abort();
|
|
/*NOTREACHED*/
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
/*
|
|
* _compat_pwscan
|
|
* Search state->db for the next desired entry.
|
|
* If search is _PW_KEYBYNUM, look for state->keynum.
|
|
* If search is _PW_KEYBYNAME, look for name.
|
|
* If search is _PW_KEYBYUID, look for uid.
|
|
* Sets *retval to the errno if the result is not NS_SUCCESS
|
|
* or NS_NOTFOUND.
|
|
*/
|
|
static int
|
|
_compat_pwscan(int *retval, struct passwd *pw, char *buffer, size_t buflen,
|
|
struct compat_state *state, int search, const char *name, uid_t uid)
|
|
{
|
|
DBT key;
|
|
int rv, r, pwflags;
|
|
const char *user, *host, *dom;
|
|
const void *from;
|
|
size_t fromlen;
|
|
|
|
_DIAGASSERT(retval != NULL);
|
|
_DIAGASSERT(pw != NULL);
|
|
_DIAGASSERT(buffer != NULL);
|
|
_DIAGASSERT(state != NULL);
|
|
/* name may be NULL */
|
|
|
|
*retval = 0;
|
|
|
|
if (state->db == NULL) {
|
|
rv = _compat_start(state);
|
|
if (rv != NS_SUCCESS)
|
|
return rv;
|
|
}
|
|
if (buflen <= 1) { /* buffer too small */
|
|
*retval = ERANGE;
|
|
return NS_UNAVAIL;
|
|
}
|
|
|
|
for (;;) { /* loop over pwd.db */
|
|
rv = NS_NOTFOUND;
|
|
if (state->mode != COMPAT_NOTOKEN &&
|
|
state->mode != COMPAT_NONE) {
|
|
/* doing a compat lookup */
|
|
struct passwd cpw;
|
|
char cbuf[_GETPW_R_SIZE_MAX];
|
|
|
|
switch (state->mode) {
|
|
|
|
case COMPAT_FULL:
|
|
/* get next user or lookup by key */
|
|
rv = _passwdcompat_pwscan(&cpw,
|
|
cbuf, sizeof(cbuf), search, name, uid);
|
|
if (rv != NS_SUCCESS)
|
|
state->mode = COMPAT_NONE;
|
|
break;
|
|
|
|
case COMPAT_NETGROUP:
|
|
/* XXXREENTRANT: getnetgrent is not thread safe */
|
|
/* get next user from netgroup */
|
|
r = getnetgrent(&host, &user, &dom);
|
|
if (r == 0) { /* end of group */
|
|
endnetgrent();
|
|
state->mode = COMPAT_NONE;
|
|
break;
|
|
}
|
|
if (!user || !*user)
|
|
break;
|
|
rv = _passwdcompat_pwscan(&cpw,
|
|
cbuf, sizeof(cbuf),
|
|
_PW_KEYBYNAME, user, 0);
|
|
break;
|
|
|
|
case COMPAT_USER:
|
|
/* get specific user */
|
|
if (state->user == NULL) {
|
|
state->mode = COMPAT_NONE;
|
|
break;
|
|
}
|
|
rv = _passwdcompat_pwscan(&cpw,
|
|
cbuf, sizeof(cbuf),
|
|
_PW_KEYBYNAME, state->user, 0);
|
|
free(state->user);
|
|
state->user = NULL;
|
|
state->mode = COMPAT_NONE;
|
|
break;
|
|
|
|
case COMPAT_NOTOKEN:
|
|
case COMPAT_NONE:
|
|
abort();
|
|
|
|
}
|
|
if (rv != NS_SUCCESS) /* if not matched, next loop */
|
|
continue;
|
|
|
|
/* copy cpw to pw, applying prototype */
|
|
if (! _pw_copy(&cpw, pw, buffer, buflen,
|
|
&state->proto, state->protoflags)) {
|
|
rv = NS_UNAVAIL;
|
|
break;
|
|
}
|
|
|
|
if (_compat_is_excluded(state, pw->pw_name))
|
|
continue; /* excluded; next loop */
|
|
|
|
if ((search == _PW_KEYBYNAME
|
|
&& strcmp(pw->pw_name, name) != 0)
|
|
|| (search == _PW_KEYBYUID && pw->pw_uid != uid)) {
|
|
continue; /* not specific; next loop */
|
|
}
|
|
|
|
break; /* exit loop if found */
|
|
} else { /* not a compat line */
|
|
state->proto.pw_name = NULL;
|
|
/* clear prototype */
|
|
}
|
|
|
|
if (state->mode == COMPAT_NOTOKEN) {
|
|
/* no compat token; do direct lookup */
|
|
switch (search) {
|
|
case _PW_KEYBYNUM:
|
|
if (state->keynum == -1) /* no more records */
|
|
return NS_NOTFOUND;
|
|
state->keynum++;
|
|
from = &state->keynum;
|
|
fromlen = sizeof(state->keynum);
|
|
break;
|
|
case _PW_KEYBYNAME:
|
|
from = name;
|
|
fromlen = strlen(name);
|
|
break;
|
|
case _PW_KEYBYUID:
|
|
from = &uid;
|
|
fromlen = sizeof(uid);
|
|
break;
|
|
default:
|
|
abort();
|
|
}
|
|
buffer[0] = search;
|
|
} else {
|
|
/* compat token; do line by line */
|
|
if (state->keynum == -1) /* no more records */
|
|
return NS_NOTFOUND;
|
|
state->keynum++;
|
|
from = &state->keynum;
|
|
fromlen = sizeof(state->keynum);
|
|
buffer[0] = _PW_KEYBYNUM;
|
|
}
|
|
|
|
if (buflen <= fromlen) { /* buffer too small */
|
|
*retval = ERANGE;
|
|
return NS_UNAVAIL;
|
|
}
|
|
memmove(buffer + 1, from, fromlen); /* setup key */
|
|
key.size = fromlen + 1;
|
|
key.data = (u_char *)buffer;
|
|
|
|
rv = _pw_getkey(state->db, &key, pw, buffer, buflen, &pwflags,
|
|
state->version);
|
|
if (rv != NS_SUCCESS) /* stop on error */
|
|
break;
|
|
|
|
if (state->mode == COMPAT_NOTOKEN)
|
|
break; /* stop if no compat token */
|
|
|
|
if (pw->pw_name[0] == '+') {
|
|
/* compat inclusion */
|
|
switch(pw->pw_name[1]) {
|
|
case '\0': /* `+' */
|
|
state->mode = COMPAT_FULL;
|
|
/* reset passwd_compat search */
|
|
/* XXXREENTRANT: setpassent is not thread safe ? */
|
|
(void) _passwdcompat_setpassent(0);
|
|
break;
|
|
case '@': /* `+@netgroup' */
|
|
state->mode = COMPAT_NETGROUP;
|
|
/* reset netgroup search */
|
|
/* XXXREENTRANT: setnetgrent is not thread safe */
|
|
setnetgrent(pw->pw_name + 2);
|
|
break;
|
|
default: /* `+name' */
|
|
state->mode = COMPAT_USER;
|
|
if (state->user)
|
|
free(state->user);
|
|
state->user = strdup(pw->pw_name + 1);
|
|
break;
|
|
}
|
|
/* save the prototype */
|
|
state->protoflags = pwflags;
|
|
if (! _pw_copy(pw, &state->proto, state->protobuf,
|
|
sizeof(state->protobuf), NULL, 0)) {
|
|
rv = NS_UNAVAIL;
|
|
break;
|
|
}
|
|
continue; /* loop again after inclusion */
|
|
} else if (pw->pw_name[0] == '-') {
|
|
/* compat exclusion */
|
|
rv = NS_SUCCESS;
|
|
switch(pw->pw_name[1]) {
|
|
case '\0': /* `-' */
|
|
break;
|
|
case '@': /* `-@netgroup' */
|
|
/* XXXREENTRANT: {set,get,end}netgrent is not thread safe */
|
|
setnetgrent(pw->pw_name + 2);
|
|
while (getnetgrent(&host, &user, &dom)) {
|
|
if (!user || !*user)
|
|
continue;
|
|
if (! _compat_add_exclude(state,user)) {
|
|
rv = NS_UNAVAIL;
|
|
break;
|
|
}
|
|
}
|
|
endnetgrent();
|
|
break;
|
|
default: /* `-name' */
|
|
if (! _compat_add_exclude(state,
|
|
pw->pw_name + 1)) {
|
|
rv = NS_UNAVAIL;
|
|
}
|
|
break;
|
|
}
|
|
if (rv != NS_SUCCESS) /* exclusion failure */
|
|
break;
|
|
continue; /* loop again after exclusion */
|
|
}
|
|
if (search == _PW_KEYBYNUM ||
|
|
(search == _PW_KEYBYUID && pw->pw_uid == uid) ||
|
|
(search == _PW_KEYBYNAME && strcmp(pw->pw_name, name) == 0))
|
|
break; /* token mode match found */
|
|
}
|
|
|
|
if (rv == NS_NOTFOUND &&
|
|
(search == _PW_KEYBYNUM || state->mode != COMPAT_NOTOKEN))
|
|
state->keynum = -1; /* flag `no more records' */
|
|
|
|
if (rv == NS_SUCCESS) {
|
|
if ((search == _PW_KEYBYNAME && strcmp(pw->pw_name, name) != 0)
|
|
|| (search == _PW_KEYBYUID && pw->pw_uid != uid))
|
|
rv = NS_NOTFOUND;
|
|
}
|
|
|
|
if (rv != NS_SUCCESS && rv != NS_NOTFOUND)
|
|
*retval = errno;
|
|
return rv;
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
static int
|
|
_compat_setpwent(void *nsrv, void *nscb, va_list ap)
|
|
{
|
|
|
|
/* force passwd_compat setpwent() */
|
|
(void) _passwdcompat_setpassent(0);
|
|
|
|
/* reset state, keep db open */
|
|
_compat_state.stayopen = 0;
|
|
return _compat_start(&_compat_state);
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
static int
|
|
_compat_setpassent(void *nsrv, void *nscb, va_list ap)
|
|
{
|
|
int *retval = va_arg(ap, int *);
|
|
int stayopen = va_arg(ap, int);
|
|
|
|
int rv;
|
|
|
|
/* force passwd_compat setpassent() */
|
|
(void) _passwdcompat_setpassent(stayopen);
|
|
|
|
_compat_state.stayopen = stayopen;
|
|
rv = _compat_start(&_compat_state);
|
|
*retval = (rv == NS_SUCCESS);
|
|
return rv;
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
static int
|
|
_compat_endpwent(void *nsrv, void *nscb, va_list ap)
|
|
{
|
|
|
|
/* force passwd_compat endpwent() */
|
|
(void) _passwdcompat_endpwent();
|
|
|
|
/* reset state, close db */
|
|
_compat_state.stayopen = 0;
|
|
return _compat_end(&_compat_state);
|
|
}
|
|
|
|
|
|
/*ARGSUSED*/
|
|
static int
|
|
_compat_getpwent(void *nsrv, void *nscb, va_list ap)
|
|
{
|
|
struct passwd **retval = va_arg(ap, struct passwd **);
|
|
|
|
int rv, rerror;
|
|
|
|
_DIAGASSERT(retval != NULL);
|
|
|
|
*retval = NULL;
|
|
rv = _compat_pwscan(&rerror, &_compat_passwd,
|
|
_compat_passwdbuf, sizeof(_compat_passwdbuf),
|
|
&_compat_state, _PW_KEYBYNUM, NULL, 0);
|
|
if (rv == NS_SUCCESS)
|
|
*retval = &_compat_passwd;
|
|
return rv;
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
static int
|
|
_compat_getpwent_r(void *nsrv, void *nscb, va_list ap)
|
|
{
|
|
int *retval = va_arg(ap, int *);
|
|
struct passwd *pw = va_arg(ap, struct passwd *);
|
|
char *buffer = va_arg(ap, char *);
|
|
size_t buflen = va_arg(ap, size_t);
|
|
struct passwd **result = va_arg(ap, struct passwd **);
|
|
|
|
int rv;
|
|
|
|
_DIAGASSERT(retval != NULL);
|
|
_DIAGASSERT(pw != NULL);
|
|
_DIAGASSERT(buffer != NULL);
|
|
_DIAGASSERT(result != NULL);
|
|
|
|
rv = _compat_pwscan(retval, pw, buffer, buflen, &_compat_state,
|
|
_PW_KEYBYNUM, NULL, 0);
|
|
if (rv == NS_SUCCESS)
|
|
*result = pw;
|
|
else
|
|
*result = NULL;
|
|
return rv;
|
|
}
|
|
|
|
|
|
/*ARGSUSED*/
|
|
static int
|
|
_compat_getpwnam(void *nsrv, void *nscb, va_list ap)
|
|
{
|
|
struct passwd **retval = va_arg(ap, struct passwd **);
|
|
const char *name = va_arg(ap, const char *);
|
|
|
|
int rv, rerror;
|
|
|
|
_DIAGASSERT(retval != NULL);
|
|
|
|
*retval = NULL;
|
|
rv = _compat_start(&_compat_state);
|
|
if (rv != NS_SUCCESS)
|
|
return rv;
|
|
rv = _compat_pwscan(&rerror, &_compat_passwd,
|
|
_compat_passwdbuf, sizeof(_compat_passwdbuf),
|
|
&_compat_state, _PW_KEYBYNAME, name, 0);
|
|
if (!_compat_state.stayopen)
|
|
_compat_end(&_compat_state);
|
|
if (rv == NS_SUCCESS)
|
|
*retval = &_compat_passwd;
|
|
return rv;
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
static int
|
|
_compat_getpwnam_r(void *nsrv, void *nscb, va_list ap)
|
|
{
|
|
int *retval = va_arg(ap, int *);
|
|
const char *name = va_arg(ap, const char *);
|
|
struct passwd *pw = va_arg(ap, struct passwd *);
|
|
char *buffer = va_arg(ap, char *);
|
|
size_t buflen = va_arg(ap, size_t);
|
|
struct passwd **result = va_arg(ap, struct passwd **);
|
|
|
|
struct compat_state state;
|
|
int rv;
|
|
|
|
_DIAGASSERT(retval != NULL);
|
|
_DIAGASSERT(pw != NULL);
|
|
_DIAGASSERT(buffer != NULL);
|
|
_DIAGASSERT(result != NULL);
|
|
|
|
*result = NULL;
|
|
memset(&state, 0, sizeof(state));
|
|
rv = _compat_pwscan(retval, pw, buffer, buflen, &state,
|
|
_PW_KEYBYNAME, name, 0);
|
|
_compat_end(&state);
|
|
if (rv == NS_SUCCESS)
|
|
*result = pw;
|
|
return rv;
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
static int
|
|
_compat_getpwuid(void *nsrv, void *nscb, va_list ap)
|
|
{
|
|
struct passwd **retval = va_arg(ap, struct passwd **);
|
|
uid_t uid = va_arg(ap, uid_t);
|
|
|
|
int rv, rerror;
|
|
|
|
_DIAGASSERT(retval != NULL);
|
|
|
|
*retval = NULL;
|
|
rv = _compat_start(&_compat_state);
|
|
if (rv != NS_SUCCESS)
|
|
return rv;
|
|
rv = _compat_pwscan(&rerror, &_compat_passwd,
|
|
_compat_passwdbuf, sizeof(_compat_passwdbuf),
|
|
&_compat_state, _PW_KEYBYUID, NULL, uid);
|
|
if (!_compat_state.stayopen)
|
|
_compat_end(&_compat_state);
|
|
if (rv == NS_SUCCESS)
|
|
*retval = &_compat_passwd;
|
|
return rv;
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
static int
|
|
_compat_getpwuid_r(void *nsrv, void *nscb, va_list ap)
|
|
{
|
|
int *retval = va_arg(ap, int *);
|
|
uid_t uid = va_arg(ap, uid_t);
|
|
struct passwd *pw = va_arg(ap, struct passwd *);
|
|
char *buffer = va_arg(ap, char *);
|
|
size_t buflen = va_arg(ap, size_t);
|
|
struct passwd **result = va_arg(ap, struct passwd **);
|
|
|
|
struct compat_state state;
|
|
int rv;
|
|
|
|
_DIAGASSERT(retval != NULL);
|
|
_DIAGASSERT(pw != NULL);
|
|
_DIAGASSERT(buffer != NULL);
|
|
_DIAGASSERT(result != NULL);
|
|
|
|
*result = NULL;
|
|
memset(&state, 0, sizeof(state));
|
|
rv = _compat_pwscan(retval, pw, buffer, buflen, &state,
|
|
_PW_KEYBYUID, NULL, uid);
|
|
_compat_end(&state);
|
|
if (rv == NS_SUCCESS)
|
|
*result = pw;
|
|
return rv;
|
|
}
|
|
|
|
#endif /* _PASSWD_COMPAT */
|
|
|
|
|
|
/*
|
|
* public functions
|
|
*/
|
|
|
|
struct passwd *
|
|
getpwent(void)
|
|
{
|
|
int r;
|
|
struct passwd *retval;
|
|
|
|
static const ns_dtab dtab[] = {
|
|
NS_FILES_CB(_files_getpwent, NULL)
|
|
NS_DNS_CB(_dns_getpwent, NULL)
|
|
NS_NIS_CB(_nis_getpwent, NULL)
|
|
NS_COMPAT_CB(_compat_getpwent, NULL)
|
|
NS_NULL_CB
|
|
};
|
|
|
|
mutex_lock(&_pwmutex);
|
|
r = nsdispatch(NULL, dtab, NSDB_PASSWD, "getpwent", __nsdefaultcompat,
|
|
&retval);
|
|
mutex_unlock(&_pwmutex);
|
|
return (r == NS_SUCCESS) ? retval : NULL;
|
|
}
|
|
|
|
int
|
|
getpwent_r(struct passwd *pwd, char *buffer, size_t buflen,
|
|
struct passwd **result)
|
|
{
|
|
int r, retval;
|
|
|
|
static const ns_dtab dtab[] = {
|
|
NS_FILES_CB(_files_getpwent_r, NULL)
|
|
NS_DNS_CB(_dns_getpwent_r, NULL)
|
|
NS_NIS_CB(_nis_getpwent_r, NULL)
|
|
NS_COMPAT_CB(_compat_getpwent_r, NULL)
|
|
NS_NULL_CB
|
|
};
|
|
|
|
_DIAGASSERT(pwd != NULL);
|
|
_DIAGASSERT(buffer != NULL);
|
|
_DIAGASSERT(result != NULL);
|
|
|
|
*result = NULL;
|
|
retval = 0;
|
|
mutex_lock(&_pwmutex);
|
|
r = nsdispatch(NULL, dtab, NSDB_PASSWD, "getpwent_r", __nsdefaultcompat,
|
|
&retval, pwd, buffer, buflen, result);
|
|
mutex_unlock(&_pwmutex);
|
|
switch (r) {
|
|
case NS_SUCCESS:
|
|
case NS_NOTFOUND:
|
|
return 0;
|
|
default:
|
|
return retval;
|
|
}
|
|
}
|
|
|
|
|
|
struct passwd *
|
|
getpwnam(const char *name)
|
|
{
|
|
int rv;
|
|
struct passwd *retval;
|
|
|
|
static const ns_dtab dtab[] = {
|
|
NS_FILES_CB(_files_getpwnam, NULL)
|
|
NS_DNS_CB(_dns_getpwnam, NULL)
|
|
NS_NIS_CB(_nis_getpwnam, NULL)
|
|
NS_COMPAT_CB(_compat_getpwnam, NULL)
|
|
NS_NULL_CB
|
|
};
|
|
|
|
mutex_lock(&_pwmutex);
|
|
rv = nsdispatch(NULL, dtab, NSDB_PASSWD, "getpwnam", __nsdefaultcompat,
|
|
&retval, name);
|
|
mutex_unlock(&_pwmutex);
|
|
return (rv == NS_SUCCESS) ? retval : NULL;
|
|
}
|
|
|
|
int
|
|
getpwnam_r(const char *name, struct passwd *pwd, char *buffer, size_t buflen,
|
|
struct passwd **result)
|
|
{
|
|
int r, retval;
|
|
|
|
static const ns_dtab dtab[] = {
|
|
NS_FILES_CB(_files_getpwnam_r, NULL)
|
|
NS_DNS_CB(_dns_getpwnam_r, NULL)
|
|
NS_NIS_CB(_nis_getpwnam_r, NULL)
|
|
NS_COMPAT_CB(_compat_getpwnam_r, NULL)
|
|
NS_NULL_CB
|
|
};
|
|
|
|
_DIAGASSERT(name != NULL);
|
|
_DIAGASSERT(pwd != NULL);
|
|
_DIAGASSERT(buffer != NULL);
|
|
_DIAGASSERT(result != NULL);
|
|
|
|
*result = NULL;
|
|
retval = 0;
|
|
mutex_lock(&_pwmutex);
|
|
r = nsdispatch(NULL, dtab, NSDB_PASSWD, "getpwnam_r", __nsdefaultcompat,
|
|
&retval, name, pwd, buffer, buflen, result);
|
|
mutex_unlock(&_pwmutex);
|
|
switch (r) {
|
|
case NS_SUCCESS:
|
|
case NS_NOTFOUND:
|
|
return 0;
|
|
default:
|
|
return retval;
|
|
}
|
|
}
|
|
|
|
struct passwd *
|
|
getpwuid(uid_t uid)
|
|
{
|
|
int rv;
|
|
struct passwd *retval;
|
|
|
|
static const ns_dtab dtab[] = {
|
|
NS_FILES_CB(_files_getpwuid, NULL)
|
|
NS_DNS_CB(_dns_getpwuid, NULL)
|
|
NS_NIS_CB(_nis_getpwuid, NULL)
|
|
NS_COMPAT_CB(_compat_getpwuid, NULL)
|
|
NS_NULL_CB
|
|
};
|
|
|
|
mutex_lock(&_pwmutex);
|
|
rv = nsdispatch(NULL, dtab, NSDB_PASSWD, "getpwuid", __nsdefaultcompat,
|
|
&retval, uid);
|
|
mutex_unlock(&_pwmutex);
|
|
return (rv == NS_SUCCESS) ? retval : NULL;
|
|
}
|
|
|
|
int
|
|
getpwuid_r(uid_t uid, struct passwd *pwd, char *buffer, size_t buflen,
|
|
struct passwd **result)
|
|
{
|
|
int r, retval;
|
|
|
|
static const ns_dtab dtab[] = {
|
|
NS_FILES_CB(_files_getpwuid_r, NULL)
|
|
NS_DNS_CB(_dns_getpwuid_r, NULL)
|
|
NS_NIS_CB(_nis_getpwuid_r, NULL)
|
|
NS_COMPAT_CB(_compat_getpwuid_r, NULL)
|
|
NS_NULL_CB
|
|
};
|
|
|
|
_DIAGASSERT(pwd != NULL);
|
|
_DIAGASSERT(buffer != NULL);
|
|
_DIAGASSERT(result != NULL);
|
|
|
|
*result = NULL;
|
|
retval = 0;
|
|
mutex_lock(&_pwmutex);
|
|
r = nsdispatch(NULL, dtab, NSDB_PASSWD, "getpwuid_r", __nsdefaultcompat,
|
|
&retval, uid, pwd, buffer, buflen, result);
|
|
|
|
mutex_unlock(&_pwmutex);
|
|
switch (r) {
|
|
case NS_SUCCESS:
|
|
case NS_NOTFOUND:
|
|
return 0;
|
|
default:
|
|
return retval;
|
|
}
|
|
}
|
|
|
|
void
|
|
endpwent(void)
|
|
{
|
|
static const ns_dtab dtab[] = {
|
|
NS_FILES_CB(_files_endpwent, NULL)
|
|
NS_DNS_CB(_dns_endpwent, NULL)
|
|
NS_NIS_CB(_nis_endpwent, NULL)
|
|
NS_COMPAT_CB(_compat_endpwent, NULL)
|
|
NS_NULL_CB
|
|
};
|
|
|
|
mutex_lock(&_pwmutex);
|
|
/* force all endpwent() methods */
|
|
(void) nsdispatch(NULL, dtab, NSDB_PASSWD, "endpwent",
|
|
__nsdefaultcompat_forceall);
|
|
mutex_unlock(&_pwmutex);
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
int
|
|
setpassent(int stayopen)
|
|
{
|
|
static const ns_dtab dtab[] = {
|
|
NS_FILES_CB(_files_setpassent, NULL)
|
|
NS_DNS_CB(_dns_setpassent, NULL)
|
|
NS_NIS_CB(_nis_setpassent, NULL)
|
|
NS_COMPAT_CB(_compat_setpassent, NULL)
|
|
NS_NULL_CB
|
|
};
|
|
int rv, retval;
|
|
|
|
mutex_lock(&_pwmutex);
|
|
/* force all setpassent() methods */
|
|
rv = nsdispatch(NULL, dtab, NSDB_PASSWD, "setpassent",
|
|
__nsdefaultcompat_forceall, &retval, stayopen);
|
|
mutex_unlock(&_pwmutex);
|
|
return (rv == NS_SUCCESS) ? retval : 0;
|
|
}
|
|
|
|
void
|
|
setpwent(void)
|
|
{
|
|
static const ns_dtab dtab[] = {
|
|
NS_FILES_CB(_files_setpwent, NULL)
|
|
NS_DNS_CB(_dns_setpwent, NULL)
|
|
NS_NIS_CB(_nis_setpwent, NULL)
|
|
NS_COMPAT_CB(_compat_setpwent, NULL)
|
|
NS_NULL_CB
|
|
};
|
|
|
|
mutex_lock(&_pwmutex);
|
|
/* force all setpwent() methods */
|
|
(void) nsdispatch(NULL, dtab, NSDB_PASSWD, "setpwent",
|
|
__nsdefaultcompat_forceall);
|
|
mutex_unlock(&_pwmutex);
|
|
}
|