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Add diclaimer of copyright to _osname() manual page.
[unix-history] / lib / libc / gen / getpwent.c
/*
* 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 = "from: @(#)getpwent.c 5.21 (Berkeley) 3/14/91";*/
static char *rcsid = "$Id: getpwent.c,v 1.10 1993/12/10 12:46:29 deraadt Exp $";
#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>
#ifdef YP
#include <stdio.h>
#include <rpc/rpc.h>
#include <rpcsvc/yp_prot.h>
#include <rpcsvc/ypclnt.h>
#endif
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();
#ifdef YP
static char *__ypcurrent, *__ypdomain;
static int __ypcurrentlen, __ypmode=0;
static char line[1024];
static int
__ypparse(pw, s)
struct passwd *pw;
char *s;
{
char *bp, *cp;
bp = s;
pw->pw_name = strsep(&bp, ":\n");
pw->pw_passwd = strsep(&bp, ":\n");
if (!(cp = strsep(&bp, ":\n")))
return 1;
pw->pw_uid = atoi(cp);
if (!(cp = strsep(&bp, ":\n")))
return 0;
pw->pw_gid = atoi(cp);
pw->pw_change = 0;
pw->pw_class = "";
pw->pw_gecos = strsep(&bp, ":\n");
pw->pw_dir = strsep(&bp, ":\n");
pw->pw_shell = strsep(&bp, ":\n");
pw->pw_expire = 0;
return 0;
}
#endif
struct passwd *
getpwent()
{
DBT key;
char bf[sizeof(_pw_keynum) + 1];
#ifdef YP
char *bp, *cp;
#endif
if (!_pw_db && !__initdb())
return((struct passwd *)NULL);
#ifdef YP
again:
if(__ypmode) {
char *key, *data;
int keylen, datalen;
int r;
if(!__ypdomain) {
if( _yp_check(&__ypdomain) == 0) {
__ypmode = 0;
goto again;
}
}
if(__ypcurrent) {
r = yp_next(__ypdomain, "passwd.byname",
__ypcurrent, __ypcurrentlen,
&key, &keylen, &data, &datalen);
free(__ypcurrent);
__ypcurrent = NULL;
/*printf("yp_next %d\n", r);*/
switch(r) {
case 0:
break;
default:
__ypcurrent = NULL;
__ypmode = 0;
free(data);
data = NULL;
goto again;
}
__ypcurrent = key;
__ypcurrentlen = keylen;
bcopy(data, line, datalen);
free(data);
data = NULL;
} else {
r = yp_first(__ypdomain, "passwd.byname",
&__ypcurrent, &__ypcurrentlen,
&data, &datalen);
/*printf("yp_first %d\n", r);*/
switch(r) {
case 0:
break;
default:
__ypmode = 0;
free(data);
goto again;
}
bcopy(data, line, datalen);
free(data);
data = NULL;
}
line[datalen] = '\0';
/*printf("line = %s\n", line);*/
bp = line;
goto parse;
}
#endif
++_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;
if(__hashpw(&key)) {
#ifdef YP
if(strcmp(_pw_passwd.pw_name, "+") == 0) {
__ypmode = 1;
goto again;
}
#endif
return &_pw_passwd;
}
return (struct passwd *)NULL;
#ifdef YP
parse:
_pw_passwd.pw_name = strsep(&bp, ":\n");
_pw_passwd.pw_passwd = strsep(&bp, ":\n");
if (!(cp = strsep(&bp, ":\n")))
goto again;
_pw_passwd.pw_uid = atoi(cp);
if (!(cp = strsep(&bp, ":\n")))
goto again;
_pw_passwd.pw_gid = atoi(cp);
_pw_passwd.pw_change = 0;
_pw_passwd.pw_class = "";
_pw_passwd.pw_gecos = strsep(&bp, ":\n");
_pw_passwd.pw_dir = strsep(&bp, ":\n");
_pw_passwd.pw_shell = strsep(&bp, ":\n");
_pw_passwd.pw_expire = 0;
return &_pw_passwd;
#endif
}
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);
#ifdef YP
bf[0] = _PW_KEYBYNAME;
len = strlen("+");
bcopy("+", bf + 1, MIN(len, UT_NAMESIZE));
key.data = (u_char *)bf;
key.size = len + 1;
/*
* If there is a user called "+", then YP is active. In that
* case we must sequence through the passwd file in sequence.
*/
if ( __hashpw(&key)) {
int r;
for(_pw_keynum=1; _pw_keynum; _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;
if(__hashpw(&key) == 0)
break;
if(strcmp(_pw_passwd.pw_name, "+") == 0) {
if(!__ypdomain) {
if(_yp_check(&__ypdomain) == 0) {
continue;
}
}
if(__ypcurrent) {
free(__ypcurrent);
__ypcurrent = NULL;
}
r = yp_match(__ypdomain, "passwd.byname",
name, strlen(name),
&__ypcurrent, &__ypcurrentlen);
switch(r) {
case 0:
break;
default:
free(__ypcurrent);
__ypcurrent = NULL;
continue;
}
bcopy(__ypcurrent, line, __ypcurrentlen);
line[__ypcurrentlen] = '\0';
if(__ypparse(&_pw_passwd, line))
continue;
}
if( strcmp(_pw_passwd.pw_name, name) == 0) {
if (!_pw_stayopen) {
(void)(_pw_db->close)(_pw_db);
_pw_db = (DB *)NULL;
}
return &_pw_passwd;
}
continue;
}
if (!_pw_stayopen) {
(void)(_pw_db->close)(_pw_db);
_pw_db = (DB *)NULL;
}
return (struct passwd *)NULL;
}
#endif /* YP */
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;
char bf[sizeof(_pw_keynum) + 1];
int keyuid, rval, len;
if (!_pw_db && !__initdb())
return((struct passwd *)NULL);
#ifdef YP
bf[0] = _PW_KEYBYNAME;
len = strlen("+");
bcopy("+", bf + 1, MIN(len, UT_NAMESIZE));
key.data = (u_char *)bf;
key.size = len + 1;
/*
* If there is a user called "+", then YP is active. In that
* case we must sequence through the passwd file in sequence.
*/
if ( __hashpw(&key)) {
char uidbuf[20];
int r;
for(_pw_keynum=1; _pw_keynum; _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;
if(__hashpw(&key) == 0)
break;
if(strcmp(_pw_passwd.pw_name, "+") == 0) {
if(!__ypdomain) {
if(_yp_check(&__ypdomain) == 0) {
continue;
}
}
if(__ypcurrent) {
free(__ypcurrent);
__ypcurrent = NULL;
}
sprintf(uidbuf, "%d", uid);
r = yp_match(__ypdomain, "passwd.byuid",
uidbuf, strlen(uidbuf),
&__ypcurrent, &__ypcurrentlen);
switch(r) {
case 0:
break;
default:
free(__ypcurrent);
__ypcurrent = NULL;
continue;
}
bcopy(__ypcurrent, line, __ypcurrentlen);
line[__ypcurrentlen] = '\0';
if(__ypparse(&_pw_passwd, line))
continue;
}
if( _pw_passwd.pw_uid == uid) {
if (!_pw_stayopen) {
(void)(_pw_db->close)(_pw_db);
_pw_db = (DB *)NULL;
}
return &_pw_passwd;
}
continue;
}
if (!_pw_stayopen) {
(void)(_pw_db->close)(_pw_db);
_pw_db = (DB *)NULL;
}
return (struct passwd *)NULL;
}
#endif /* YP */
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;
#ifdef YP
__ypmode = 0;
if(__ypcurrent)
free(__ypcurrent);
__ypcurrent = NULL;
#endif
return(1);
}
void
setpwent()
{
(void) setpassent(0);
}
void
endpwent()
{
_pw_keynum = 0;
if (_pw_db) {
(void)(_pw_db->close)(_pw_db);
_pw_db = (DB *)NULL;
}
#ifdef YP
__ypmode = 0;
if(__ypcurrent)
free(__ypcurrent);
__ypcurrent = NULL;
#endif
}
static int
__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 int
__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);
}
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.