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/*
* Copyright (c) 1988, 1993
* 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 8.1 (Berkeley) 6/4/93";
#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 = dbopen(p, O_RDONLY, 0, DB_HASH, 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);
}
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