470 lines
10 KiB
C
470 lines
10 KiB
C
/*
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* Copyright (c) 1988 The Regents of the University of California.
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* 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 the University of
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* California, Berkeley and its contributors.
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* 4. 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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#if defined(LIBC_SCCS) && !defined(lint)
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/*static char *sccsid = "from: @(#)getpwent.c 5.21 (Berkeley) 3/14/91";*/
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static char *rcsid = "$Id: getpwent.c,v 1.10 1993/12/10 12:46:29 deraadt Exp $";
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#endif /* LIBC_SCCS and not lint */
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#include <sys/param.h>
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#include <fcntl.h>
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#include <db.h>
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#include <syslog.h>
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#include <pwd.h>
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#include <utmp.h>
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#include <errno.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <string.h>
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#include <limits.h>
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#ifdef YP
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#include <stdio.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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static struct passwd _pw_passwd; /* password structure */
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static DB *_pw_db; /* password database */
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static int _pw_keynum; /* key counter */
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static int _pw_stayopen; /* keep fd's open */
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static int __hashpw(), __initdb();
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#ifdef YP
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static char *__ypcurrent, *__ypdomain;
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static int __ypcurrentlen, __ypmode=0;
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static char line[1024];
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static int
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__ypparse(pw, s)
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struct passwd *pw;
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char *s;
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{
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char *bp, *cp;
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bp = s;
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pw->pw_name = strsep(&bp, ":\n");
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pw->pw_passwd = strsep(&bp, ":\n");
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if (!(cp = strsep(&bp, ":\n")))
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return 1;
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pw->pw_uid = atoi(cp);
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if (!(cp = strsep(&bp, ":\n")))
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return 0;
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pw->pw_gid = atoi(cp);
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pw->pw_change = 0;
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pw->pw_class = "";
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pw->pw_gecos = strsep(&bp, ":\n");
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pw->pw_dir = strsep(&bp, ":\n");
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pw->pw_shell = strsep(&bp, ":\n");
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pw->pw_expire = 0;
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return 0;
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}
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#endif
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struct passwd *
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getpwent()
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{
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DBT key;
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char bf[sizeof(_pw_keynum) + 1];
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#ifdef YP
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char *bp, *cp;
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#endif
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if (!_pw_db && !__initdb())
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return((struct passwd *)NULL);
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#ifdef YP
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again:
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if(__ypmode) {
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char *key, *data;
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int keylen, datalen;
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int r;
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if(!__ypdomain) {
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if( _yp_check(&__ypdomain) == 0) {
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__ypmode = 0;
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goto again;
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}
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}
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if(__ypcurrent) {
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r = yp_next(__ypdomain, "passwd.byname",
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__ypcurrent, __ypcurrentlen,
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&key, &keylen, &data, &datalen);
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free(__ypcurrent);
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__ypcurrent = NULL;
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/*printf("yp_next %d\n", r);*/
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switch(r) {
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case 0:
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break;
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default:
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__ypcurrent = NULL;
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__ypmode = 0;
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free(data);
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data = NULL;
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goto again;
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}
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__ypcurrent = key;
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__ypcurrentlen = keylen;
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bcopy(data, line, datalen);
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free(data);
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data = NULL;
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} else {
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r = yp_first(__ypdomain, "passwd.byname",
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&__ypcurrent, &__ypcurrentlen,
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&data, &datalen);
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/*printf("yp_first %d\n", r);*/
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switch(r) {
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case 0:
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break;
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default:
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__ypmode = 0;
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free(data);
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goto again;
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}
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bcopy(data, line, datalen);
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free(data);
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data = NULL;
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}
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line[datalen] = '\0';
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/*printf("line = %s\n", line);*/
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bp = line;
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goto parse;
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}
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#endif
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++_pw_keynum;
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bf[0] = _PW_KEYBYNUM;
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bcopy((char *)&_pw_keynum, bf + 1, sizeof(_pw_keynum));
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key.data = (u_char *)bf;
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key.size = sizeof(_pw_keynum) + 1;
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if(__hashpw(&key)) {
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#ifdef YP
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if(strcmp(_pw_passwd.pw_name, "+") == 0) {
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__ypmode = 1;
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goto again;
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}
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#endif
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return &_pw_passwd;
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}
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return (struct passwd *)NULL;
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#ifdef YP
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parse:
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_pw_passwd.pw_name = strsep(&bp, ":\n");
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_pw_passwd.pw_passwd = strsep(&bp, ":\n");
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if (!(cp = strsep(&bp, ":\n")))
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goto again;
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_pw_passwd.pw_uid = atoi(cp);
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if (!(cp = strsep(&bp, ":\n")))
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goto again;
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_pw_passwd.pw_gid = atoi(cp);
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_pw_passwd.pw_change = 0;
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_pw_passwd.pw_class = "";
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_pw_passwd.pw_gecos = strsep(&bp, ":\n");
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_pw_passwd.pw_dir = strsep(&bp, ":\n");
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_pw_passwd.pw_shell = strsep(&bp, ":\n");
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_pw_passwd.pw_expire = 0;
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return &_pw_passwd;
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#endif
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}
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struct passwd *
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getpwnam(name)
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const char *name;
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{
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DBT key;
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int len, rval;
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char bf[UT_NAMESIZE + 1];
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if (!_pw_db && !__initdb())
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return((struct passwd *)NULL);
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#ifdef YP
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bf[0] = _PW_KEYBYNAME;
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len = strlen("+");
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bcopy("+", bf + 1, MIN(len, UT_NAMESIZE));
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key.data = (u_char *)bf;
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key.size = len + 1;
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/*
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* If there is a user called "+", then YP is active. In that
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* case we must sequence through the passwd file in sequence.
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*/
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if ( __hashpw(&key)) {
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int r;
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for(_pw_keynum=1; _pw_keynum; _pw_keynum++) {
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bf[0] = _PW_KEYBYNUM;
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bcopy((char *)&_pw_keynum, bf + 1, sizeof(_pw_keynum));
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key.data = (u_char *)bf;
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key.size = sizeof(_pw_keynum) + 1;
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if(__hashpw(&key) == 0)
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break;
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if(strcmp(_pw_passwd.pw_name, "+") == 0) {
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if(!__ypdomain) {
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if(_yp_check(&__ypdomain) == 0) {
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continue;
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}
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}
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if(__ypcurrent) {
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free(__ypcurrent);
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__ypcurrent = NULL;
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}
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r = yp_match(__ypdomain, "passwd.byname",
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name, strlen(name),
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&__ypcurrent, &__ypcurrentlen);
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switch(r) {
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case 0:
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break;
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default:
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free(__ypcurrent);
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__ypcurrent = NULL;
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continue;
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}
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bcopy(__ypcurrent, line, __ypcurrentlen);
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line[__ypcurrentlen] = '\0';
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if(__ypparse(&_pw_passwd, line))
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continue;
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}
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if( strcmp(_pw_passwd.pw_name, name) == 0) {
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if (!_pw_stayopen) {
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(void)(_pw_db->close)(_pw_db);
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_pw_db = (DB *)NULL;
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}
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return &_pw_passwd;
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}
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continue;
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}
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if (!_pw_stayopen) {
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(void)(_pw_db->close)(_pw_db);
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_pw_db = (DB *)NULL;
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}
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return (struct passwd *)NULL;
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}
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#endif /* YP */
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bf[0] = _PW_KEYBYNAME;
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len = strlen(name);
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bcopy(name, bf + 1, MIN(len, UT_NAMESIZE));
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key.data = (u_char *)bf;
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key.size = len + 1;
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rval = __hashpw(&key);
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if (!_pw_stayopen) {
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(void)(_pw_db->close)(_pw_db);
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_pw_db = (DB *)NULL;
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}
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return(rval ? &_pw_passwd : (struct passwd *)NULL);
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}
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struct passwd *
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#ifdef __STDC__
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getpwuid(uid_t uid)
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#else
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getpwuid(uid)
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int uid;
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#endif
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{
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DBT key;
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char bf[sizeof(_pw_keynum) + 1];
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int keyuid, rval, len;
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if (!_pw_db && !__initdb())
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return((struct passwd *)NULL);
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#ifdef YP
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bf[0] = _PW_KEYBYNAME;
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len = strlen("+");
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bcopy("+", bf + 1, MIN(len, UT_NAMESIZE));
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key.data = (u_char *)bf;
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key.size = len + 1;
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/*
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* If there is a user called "+", then YP is active. In that
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* case we must sequence through the passwd file in sequence.
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*/
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if ( __hashpw(&key)) {
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char uidbuf[20];
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int r;
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for(_pw_keynum=1; _pw_keynum; _pw_keynum++) {
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bf[0] = _PW_KEYBYNUM;
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bcopy((char *)&_pw_keynum, bf + 1, sizeof(_pw_keynum));
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key.data = (u_char *)bf;
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key.size = sizeof(_pw_keynum) + 1;
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if(__hashpw(&key) == 0)
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break;
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if(strcmp(_pw_passwd.pw_name, "+") == 0) {
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if(!__ypdomain) {
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if(_yp_check(&__ypdomain) == 0) {
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continue;
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}
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}
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if(__ypcurrent) {
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free(__ypcurrent);
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__ypcurrent = NULL;
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}
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sprintf(uidbuf, "%d", uid);
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r = yp_match(__ypdomain, "passwd.byuid",
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uidbuf, strlen(uidbuf),
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&__ypcurrent, &__ypcurrentlen);
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switch(r) {
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case 0:
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break;
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default:
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free(__ypcurrent);
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__ypcurrent = NULL;
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continue;
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}
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bcopy(__ypcurrent, line, __ypcurrentlen);
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line[__ypcurrentlen] = '\0';
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if(__ypparse(&_pw_passwd, line))
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continue;
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}
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if( _pw_passwd.pw_uid == uid) {
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if (!_pw_stayopen) {
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(void)(_pw_db->close)(_pw_db);
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_pw_db = (DB *)NULL;
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}
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return &_pw_passwd;
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}
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continue;
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}
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if (!_pw_stayopen) {
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(void)(_pw_db->close)(_pw_db);
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_pw_db = (DB *)NULL;
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}
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return (struct passwd *)NULL;
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}
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#endif /* YP */
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bf[0] = _PW_KEYBYUID;
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keyuid = uid;
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bcopy(&keyuid, bf + 1, sizeof(keyuid));
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key.data = (u_char *)bf;
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key.size = sizeof(keyuid) + 1;
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rval = __hashpw(&key);
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if (!_pw_stayopen) {
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(void)(_pw_db->close)(_pw_db);
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_pw_db = (DB *)NULL;
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}
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return(rval ? &_pw_passwd : (struct passwd *)NULL);
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}
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int
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setpassent(stayopen)
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int stayopen;
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{
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_pw_keynum = 0;
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_pw_stayopen = stayopen;
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#ifdef YP
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__ypmode = 0;
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if(__ypcurrent)
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free(__ypcurrent);
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__ypcurrent = NULL;
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#endif
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return(1);
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}
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void
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setpwent()
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{
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(void) setpassent(0);
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}
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void
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endpwent()
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{
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_pw_keynum = 0;
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if (_pw_db) {
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(void)(_pw_db->close)(_pw_db);
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_pw_db = (DB *)NULL;
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}
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#ifdef YP
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__ypmode = 0;
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if(__ypcurrent)
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free(__ypcurrent);
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__ypcurrent = NULL;
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#endif
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}
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static int
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__initdb()
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{
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static int warned;
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char *p;
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p = (geteuid()) ? _PATH_MP_DB : _PATH_SMP_DB;
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_pw_db = dbopen(p, O_RDONLY, 0, DB_HASH, NULL);
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if (_pw_db)
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return(1);
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if (!warned)
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syslog(LOG_ERR, "%s: %m", p);
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return(0);
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}
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static int
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__hashpw(key)
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DBT *key;
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{
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register char *p, *t;
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static u_int max;
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static char *line;
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DBT data;
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if ((_pw_db->get)(_pw_db, key, &data, 0))
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return(0);
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p = (char *)data.data;
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if (data.size > max && !(line = realloc(line, max += 1024)))
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return(0);
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t = line;
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#define EXPAND(e) e = t; while (*t++ = *p++);
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EXPAND(_pw_passwd.pw_name);
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EXPAND(_pw_passwd.pw_passwd);
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bcopy(p, (char *)&_pw_passwd.pw_uid, sizeof(int));
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p += sizeof(int);
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bcopy(p, (char *)&_pw_passwd.pw_gid, sizeof(int));
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p += sizeof(int);
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bcopy(p, (char *)&_pw_passwd.pw_change, sizeof(time_t));
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p += sizeof(time_t);
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EXPAND(_pw_passwd.pw_class);
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EXPAND(_pw_passwd.pw_gecos);
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EXPAND(_pw_passwd.pw_dir);
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EXPAND(_pw_passwd.pw_shell);
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bcopy(p, (char *)&_pw_passwd.pw_expire, sizeof(time_t));
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p += sizeof(time_t);
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return(1);
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}
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