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- /*
- * Copyright (c) 1988 The Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
- #if defined(LIBC_SCCS) && !defined(lint)
- static char sccsid[] = "@(#)getpwent.c 5.21 (Berkeley) 3/14/91";
- #endif /* LIBC_SCCS and not lint */
-
- #include <sys/param.h>
- #include <fcntl.h>
- #include <db.h>
- #include <syslog.h>
- #include <pwd.h>
- #include <utmp.h>
- #include <errno.h>
- #include <unistd.h>
- #include <stdlib.h>
- #include <string.h>
- #include <limits.h>
-
- static struct passwd _pw_passwd; /* password structure */
- static DB *_pw_db; /* password database */
- static int _pw_keynum; /* key counter */
- static int _pw_stayopen; /* keep fd's open */
- static int __hashpw(), __initdb();
-
- struct passwd *
- getpwent()
- {
- DBT key;
- char bf[sizeof(_pw_keynum) + 1];
-
- if (!_pw_db && !__initdb())
- return((struct passwd *)NULL);
-
- ++_pw_keynum;
- bf[0] = _PW_KEYBYNUM;
- bcopy((char *)&_pw_keynum, bf + 1, sizeof(_pw_keynum));
- key.data = (u_char *)bf;
- key.size = sizeof(_pw_keynum) + 1;
- return(__hashpw(&key) ? &_pw_passwd : (struct passwd *)NULL);
- }
-
- struct passwd *
- getpwnam(name)
- const char *name;
- {
- DBT key;
- int len, rval;
- char bf[UT_NAMESIZE + 1];
-
- if (!_pw_db && !__initdb())
- return((struct passwd *)NULL);
-
- bf[0] = _PW_KEYBYNAME;
- len = strlen(name);
- bcopy(name, bf + 1, MIN(len, UT_NAMESIZE));
- key.data = (u_char *)bf;
- key.size = len + 1;
- rval = __hashpw(&key);
-
- if (!_pw_stayopen) {
- (void)(_pw_db->close)(_pw_db);
- _pw_db = (DB *)NULL;
- }
- return(rval ? &_pw_passwd : (struct passwd *)NULL);
- }
-
- struct passwd *
- #ifdef __STDC__
- getpwuid(uid_t uid)
- #else
- getpwuid(uid)
- int uid;
- #endif
- {
- DBT key;
- int keyuid, rval;
- char bf[sizeof(keyuid) + 1];
-
- if (!_pw_db && !__initdb())
- return((struct passwd *)NULL);
-
- bf[0] = _PW_KEYBYUID;
- keyuid = uid;
- bcopy(&keyuid, bf + 1, sizeof(keyuid));
- key.data = (u_char *)bf;
- key.size = sizeof(keyuid) + 1;
- rval = __hashpw(&key);
-
- if (!_pw_stayopen) {
- (void)(_pw_db->close)(_pw_db);
- _pw_db = (DB *)NULL;
- }
- return(rval ? &_pw_passwd : (struct passwd *)NULL);
- }
-
- int
- setpassent(stayopen)
- int stayopen;
- {
- _pw_keynum = 0;
- _pw_stayopen = stayopen;
- return(1);
- }
-
- int
- setpwent()
- {
- _pw_keynum = 0;
- _pw_stayopen = 0;
- return(1);
- }
-
- void
- endpwent()
- {
- _pw_keynum = 0;
- if (_pw_db) {
- (void)(_pw_db->close)(_pw_db);
- _pw_db = (DB *)NULL;
- }
- }
-
- static
- __initdb()
- {
- static int warned;
- char *p;
-
- p = (geteuid()) ? _PATH_MP_DB : _PATH_SMP_DB;
- /*
- _pw_db = hash_open(p, O_RDONLY, 0, NULL);
- if (_pw_db)
- return(1);
- if (!warned)
- syslog(LOG_ERR, "%s: %m", p);
- */
- return(0);
- }
-
- static
- __hashpw(key)
- DBT *key;
- {
- register char *p, *t;
- static u_int max;
- static char *line;
- DBT data;
-
- if ((_pw_db->get)(_pw_db, key, &data, 0))
- return(0);
- p = (char *)data.data;
- if (data.size > max && !(line = realloc(line, max += 1024)))
- return(0);
-
- t = line;
- #define EXPAND(e) e = t; while (*t++ = *p++);
- EXPAND(_pw_passwd.pw_name);
- EXPAND(_pw_passwd.pw_passwd);
- bcopy(p, (char *)&_pw_passwd.pw_uid, sizeof(int));
- p += sizeof(int);
- bcopy(p, (char *)&_pw_passwd.pw_gid, sizeof(int));
- p += sizeof(int);
- bcopy(p, (char *)&_pw_passwd.pw_change, sizeof(time_t));
- p += sizeof(time_t);
- EXPAND(_pw_passwd.pw_class);
- EXPAND(_pw_passwd.pw_gecos);
- EXPAND(_pw_passwd.pw_dir);
- EXPAND(_pw_passwd.pw_shell);
- bcopy(p, (char *)&_pw_passwd.pw_expire, sizeof(time_t));
- p += sizeof(time_t);
- return(1);
- }
-