/* $NetBSD: getpwent.c,v 1.51 2002/05/26 14:03:20 wiz Exp $ */ /* * Copyright (c) 1988, 1993 * The Regents of the University of California. All rights reserved. * Portions Copyright (c) 1994, 1995, Jason Downs. 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. */ #include #if defined(LIBC_SCCS) && !defined(lint) #if 0 static char sccsid[] = "@(#)getpwent.c 8.2 (Berkeley) 4/27/95"; #else __RCSID("$NetBSD: getpwent.c,v 1.51 2002/05/26 14:03:20 wiz Exp $"); #endif #endif /* LIBC_SCCS and not lint */ #include "namespace.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef HESIOD #include #endif #ifdef YP #include #include #include #include #include #endif #include "pw_private.h" #if defined(YP) || defined(HESIOD) #define _PASSWD_COMPAT #endif #ifdef __weak_alias __weak_alias(endpwent,_endpwent) __weak_alias(getpwent,_getpwent) __weak_alias(getpwnam,_getpwnam) __weak_alias(getpwuid,_getpwuid) __weak_alias(setpassent,_setpassent) __weak_alias(setpwent,_setpwent) #endif /* * The lookup techniques and data extraction code here must be kept * in sync with that in `pwd_mkdb'. */ static struct passwd _pw_passwd; /* password structure */ static DB *_pw_db; /* password database */ static int _pw_keynum; /* key counter. no more records if -1 */ static int _pw_stayopen; /* keep fd's open */ static int _pw_flags; /* password flags */ static int __hashpw __P((DBT *)); static int __initdb __P((void)); const char __yp_token[] = "__YP!"; /* Let pwd_mkdb pull this in. */ static const ns_src compatsrc[] = { { NSSRC_COMPAT, NS_SUCCESS }, { 0 } }; #ifdef YP static char *__ypcurrent, *__ypdomain; static int __ypcurrentlen; static int _pw_ypdone; /* non-zero if no more yp records */ #endif #ifdef HESIOD static int _pw_hesnum; /* hes counter. no more records if -1 */ #endif #ifdef _PASSWD_COMPAT enum _pwmode { PWMODE_NONE, PWMODE_FULL, PWMODE_USER, PWMODE_NETGRP }; static enum _pwmode __pwmode; enum _ypmap { YPMAP_NONE, YPMAP_ADJUNCT, YPMAP_MASTER }; static struct passwd *__pwproto = (struct passwd *)NULL; static int __pwproto_flags; static char line[1024]; static long prbuf[1024 / sizeof(long)]; static DB *__pwexclude = (DB *)NULL; static int __pwexclude_add __P((const char *)); static int __pwexclude_is __P((const char *)); static void __pwproto_set __P((void)); static int __ypmaptype __P((void)); static int __pwparse __P((struct passwd *, char *)); /* macros for deciding which YP maps to use. */ #define PASSWD_BYNAME (__ypmaptype() == YPMAP_MASTER \ ? "master.passwd.byname" : "passwd.byname") #define PASSWD_BYUID (__ypmaptype() == YPMAP_MASTER \ ? "master.passwd.byuid" : "passwd.byuid") /* * add a name to the compat mode exclude list */ static int __pwexclude_add(name) const char *name; { DBT key; DBT data; _DIAGASSERT(name != NULL); /* initialize the exclusion table if needed. */ if(__pwexclude == (DB *)NULL) { __pwexclude = dbopen(NULL, O_RDWR, 600, DB_HASH, NULL); if(__pwexclude == (DB *)NULL) return 1; } /* set up the key */ key.size = strlen(name); /* LINTED key does not get modified */ key.data = (char *)name; /* data is nothing. */ data.data = NULL; data.size = 0; /* store it */ if((__pwexclude->put)(__pwexclude, &key, &data, 0) == -1) return 1; return 0; } /* * test if a name is on the compat mode exclude list */ static int __pwexclude_is(name) const char *name; { DBT key; DBT data; _DIAGASSERT(name != NULL); if(__pwexclude == (DB *)NULL) return 0; /* nothing excluded */ /* set up the key */ key.size = strlen(name); /* LINTED key does not get modified */ key.data = (char *)name; if((__pwexclude->get)(__pwexclude, &key, &data, 0) == 0) return 1; /* excluded */ return 0; } /* * setup the compat mode prototype template */ static void __pwproto_set() { char *ptr; struct passwd *pw = &_pw_passwd; /* make this the new prototype */ ptr = (char *)(void *)prbuf; /* first allocate the struct. */ __pwproto = (struct passwd *)(void *)ptr; ptr += sizeof(struct passwd); /* name */ if(pw->pw_name && (pw->pw_name)[0]) { ptr = (char *)ALIGN((u_long)ptr); memmove(ptr, pw->pw_name, strlen(pw->pw_name) + 1); __pwproto->pw_name = ptr; ptr += (strlen(pw->pw_name) + 1); } else __pwproto->pw_name = (char *)NULL; /* password */ if(pw->pw_passwd && (pw->pw_passwd)[0]) { ptr = (char *)ALIGN((u_long)ptr); memmove(ptr, pw->pw_passwd, strlen(pw->pw_passwd) + 1); __pwproto->pw_passwd = ptr; ptr += (strlen(pw->pw_passwd) + 1); } else __pwproto->pw_passwd = (char *)NULL; /* uid */ __pwproto->pw_uid = pw->pw_uid; /* gid */ __pwproto->pw_gid = pw->pw_gid; /* change (ignored anyway) */ __pwproto->pw_change = pw->pw_change; /* class (ignored anyway) */ __pwproto->pw_class = ""; /* gecos */ if(pw->pw_gecos && (pw->pw_gecos)[0]) { ptr = (char *)ALIGN((u_long)ptr); memmove(ptr, pw->pw_gecos, strlen(pw->pw_gecos) + 1); __pwproto->pw_gecos = ptr; ptr += (strlen(pw->pw_gecos) + 1); } else __pwproto->pw_gecos = (char *)NULL; /* dir */ if(pw->pw_dir && (pw->pw_dir)[0]) { ptr = (char *)ALIGN((u_long)ptr); memmove(ptr, pw->pw_dir, strlen(pw->pw_dir) + 1); __pwproto->pw_dir = ptr; ptr += (strlen(pw->pw_dir) + 1); } else __pwproto->pw_dir = (char *)NULL; /* shell */ if(pw->pw_shell && (pw->pw_shell)[0]) { ptr = (char *)ALIGN((u_long)ptr); memmove(ptr, pw->pw_shell, strlen(pw->pw_shell) + 1); __pwproto->pw_shell = ptr; ptr += (strlen(pw->pw_shell) + 1); } else __pwproto->pw_shell = (char *)NULL; /* expire (ignored anyway) */ __pwproto->pw_expire = pw->pw_expire; /* flags */ __pwproto_flags = _pw_flags; } static int __ypmaptype() { static int maptype = -1; int order, r; if (maptype != -1) return (maptype); maptype = YPMAP_NONE; if (geteuid() != 0) return (maptype); if (!__ypdomain) { if( _yp_check(&__ypdomain) == 0) return (maptype); } r = yp_order(__ypdomain, "master.passwd.byname", &order); if (r == 0) { maptype = YPMAP_MASTER; return (maptype); } /* * NIS+ in YP compat mode doesn't support * YPPROC_ORDER -- no point in continuing. */ if (r == YPERR_YPERR) return (maptype); /* master.passwd doesn't exist -- try passwd.adjunct */ if (r == YPERR_MAP) { r = yp_order(__ypdomain, "passwd.adjunct.byname", &order); if (r == 0) maptype = YPMAP_ADJUNCT; return (maptype); } return (maptype); } /* * parse a passwd file line (from NIS or HESIOD). * assumed to be `old-style' if maptype != YPMAP_MASTER. */ static int __pwparse(pw, s) struct passwd *pw; char *s; { static char adjunctpw[YPMAXRECORD + 2]; int flags, maptype; _DIAGASSERT(pw != NULL); _DIAGASSERT(s != NULL); maptype = __ypmaptype(); flags = _PASSWORD_NOWARN; if (maptype != YPMAP_MASTER) flags |= _PASSWORD_OLDFMT; if (! __pw_scan(s, pw, &flags)) return 1; /* now let the prototype override, if set. */ if(__pwproto != (struct passwd *)NULL) { #ifdef PW_OVERRIDE_PASSWD if(__pwproto->pw_passwd != (char *)NULL) pw->pw_passwd = __pwproto->pw_passwd; #endif if(!(__pwproto_flags & _PASSWORD_NOUID)) pw->pw_uid = __pwproto->pw_uid; if(!(__pwproto_flags & _PASSWORD_NOGID)) pw->pw_gid = __pwproto->pw_gid; if(__pwproto->pw_gecos != (char *)NULL) pw->pw_gecos = __pwproto->pw_gecos; if(__pwproto->pw_dir != (char *)NULL) pw->pw_dir = __pwproto->pw_dir; if(__pwproto->pw_shell != (char *)NULL) pw->pw_shell = __pwproto->pw_shell; } if ((maptype == YPMAP_ADJUNCT) && (strstr(pw->pw_passwd, "##") != NULL)) { char *data, *bp; int datalen; if (yp_match(__ypdomain, "passwd.adjunct.byname", pw->pw_name, (int)strlen(pw->pw_name), &data, &datalen) == 0) { strlcpy(adjunctpw, data, MIN((size_t)datalen, sizeof(adjunctpw))); /* skip name to get password */ if ((bp = strsep(&data, ":")) != NULL && (bp = strsep(&data, ":")) != NULL) pw->pw_passwd = bp; } } return 0; } #endif /* _PASSWD_COMPAT */ /* * local files implementation of getpw*() * varargs: type, [ uid (type == _PW_KEYBYUID) | name (type == _PW_KEYBYNAME) ] */ static int _local_getpw __P((void *, void *, va_list)); /*ARGSUSED*/ static int _local_getpw(rv, cb_data, ap) void *rv; void *cb_data; va_list ap; { DBT key; char bf[/*CONSTCOND*/ MAX(MAXLOGNAME, sizeof(_pw_keynum)) + 1]; uid_t uid; size_t len; int search, rval; const char *name; if (!_pw_db && !__initdb()) return NS_UNAVAIL; search = va_arg(ap, int); bf[0] = search; switch (search) { case _PW_KEYBYNUM: if (_pw_keynum == -1) return NS_NOTFOUND; /* no more local records */ ++_pw_keynum; memmove(bf + 1, &_pw_keynum, sizeof(_pw_keynum)); key.size = sizeof(_pw_keynum) + 1; break; case _PW_KEYBYNAME: name = va_arg(ap, const char *); len = strlen(name); if (len > MAXLOGNAME) return NS_NOTFOUND; memmove(bf + 1, name, len); key.size = len + 1; break; case _PW_KEYBYUID: uid = va_arg(ap, uid_t); memmove(bf + 1, &uid, sizeof(uid)); key.size = sizeof(uid) + 1; break; default: abort(); } key.data = (u_char *)bf; rval = __hashpw(&key); if (rval == NS_NOTFOUND && search == _PW_KEYBYNUM) _pw_keynum = -1; /* flag `no more local records' */ if (!_pw_stayopen && (search != _PW_KEYBYNUM)) { (void)(_pw_db->close)(_pw_db); _pw_db = (DB *)NULL; } return (rval); } #ifdef HESIOD /* * hesiod implementation of getpw*() * varargs: type, [ uid (type == _PW_KEYBYUID) | name (type == _PW_KEYBYNAME) ] */ static int _dns_getpw __P((void *, void *, va_list)); /*ARGSUSED*/ static int _dns_getpw(rv, cb_data, ap) void *rv; void *cb_data; va_list ap; { const char *name; uid_t uid; int search; const char *map; char **hp; void *context; int r; search = va_arg(ap, int); nextdnsbynum: switch (search) { case _PW_KEYBYNUM: if (_pw_hesnum == -1) return NS_NOTFOUND; /* no more hesiod records */ snprintf(line, sizeof(line) - 1, "passwd-%u", _pw_hesnum); _pw_hesnum++; map = "passwd"; break; case _PW_KEYBYNAME: name = va_arg(ap, const char *); strncpy(line, name, sizeof(line)); map = "passwd"; break; case _PW_KEYBYUID: uid = va_arg(ap, uid_t); snprintf(line, sizeof(line), "%u", (unsigned int)uid); map = "uid"; /* XXX this is `passwd' on ultrix */ break; default: abort(); } line[sizeof(line) - 1] = '\0'; r = NS_UNAVAIL; if (hesiod_init(&context) == -1) return (r); hp = hesiod_resolve(context, line, map); if (hp == NULL) { if (errno == ENOENT) { /* flag `no more hesiod records' */ if (search == _PW_KEYBYNUM) _pw_hesnum = -1; r = NS_NOTFOUND; } goto cleanup_dns_getpw; } strncpy(line, hp[0], sizeof(line)); /* only check first elem */ line[sizeof(line) - 1] = '\0'; hesiod_free_list(context, hp); if (__pwparse(&_pw_passwd, line)) { if (search == _PW_KEYBYNUM) goto nextdnsbynum; /* skip dogdy entries */ r = NS_UNAVAIL; } else r = NS_SUCCESS; cleanup_dns_getpw: hesiod_end(context); return (r); } #endif #ifdef YP /* * nis implementation of getpw*() * varargs: type, [ uid (type == _PW_KEYBYUID) | name (type == _PW_KEYBYNAME) ] */ static int _nis_getpw __P((void *, void *, va_list)); /*ARGSUSED*/ static int _nis_getpw(rv, cb_data, ap) void *rv; void *cb_data; va_list ap; { const char *name; uid_t uid; int search; char *key, *data; const char *map; int keylen, datalen, r, rval; if(__ypdomain == NULL) { if(_yp_check(&__ypdomain) == 0) return NS_UNAVAIL; } map = PASSWD_BYNAME; search = va_arg(ap, int); switch (search) { case _PW_KEYBYNUM: break; case _PW_KEYBYNAME: name = va_arg(ap, const char *); strncpy(line, name, sizeof(line)); break; case _PW_KEYBYUID: uid = va_arg(ap, uid_t); snprintf(line, sizeof(line), "%u", (unsigned int)uid); map = PASSWD_BYUID; break; default: abort(); } line[sizeof(line) - 1] = '\0'; rval = NS_UNAVAIL; if (search != _PW_KEYBYNUM) { data = NULL; r = yp_match(__ypdomain, map, line, (int)strlen(line), &data, &datalen); if (r == YPERR_KEY) rval = NS_NOTFOUND; if (r != 0) { if (data) free(data); return (rval); } data[datalen] = '\0'; /* clear trailing \n */ strncpy(line, data, sizeof(line)); line[sizeof(line) - 1] = '\0'; free(data); if (__pwparse(&_pw_passwd, line)) return NS_UNAVAIL; return NS_SUCCESS; } if (_pw_ypdone) return NS_NOTFOUND; for (;;) { data = key = NULL; if (__ypcurrent) { r = yp_next(__ypdomain, map, __ypcurrent, __ypcurrentlen, &key, &keylen, &data, &datalen); free(__ypcurrent); switch (r) { case 0: __ypcurrent = key; __ypcurrentlen = keylen; break; case YPERR_NOMORE: __ypcurrent = NULL; /* flag `no more yp records' */ _pw_ypdone = 1; rval = NS_NOTFOUND; } } else { r = yp_first(__ypdomain, map, &__ypcurrent, &__ypcurrentlen, &data, &datalen); } if (r != 0) { if (key) free(key); if (data) free(data); return (rval); } data[datalen] = '\0'; /* clear trailing \n */ strncpy(line, data, sizeof(line)); line[sizeof(line) - 1] = '\0'; free(data); if (! __pwparse(&_pw_passwd, line)) return NS_SUCCESS; } /* NOTREACHED */ } /* _nis_getpw */ #endif #ifdef _PASSWD_COMPAT /* * See if the compat token is in the database. Only works if pwd_mkdb knows * about the token. */ static int __has_compatpw __P((void)); static int __has_compatpw() { DBT key, data; DBT pkey, pdata; char bf[MAXLOGNAME]; /*LINTED*/ key.data = (u_char *)__yp_token; key.size = strlen(__yp_token); /* Pre-token database support. */ bf[0] = _PW_KEYBYNAME; bf[1] = '+'; pkey.data = (u_char *)bf; pkey.size = 2; if ((_pw_db->get)(_pw_db, &key, &data, 0) && (_pw_db->get)(_pw_db, &pkey, &pdata, 0)) return 0; /* No compat token */ return 1; } /* * log an error if "files" or "compat" is specified in passwd_compat database */ static int _bad_getpw __P((void *, void *, va_list)); /*ARGSUSED*/ static int _bad_getpw(rv, cb_data, ap) void *rv; void *cb_data; va_list ap; { static int warned; _DIAGASSERT(cb_data != NULL); if (!warned) { syslog(LOG_ERR, "nsswitch.conf passwd_compat database can't use '%s'", (char *)cb_data); } warned = 1; return NS_UNAVAIL; } /* * 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. * only Hesiod and NIS is supported - it doesn't make sense to lookup * compat names from 'files' or 'compat'. */ static int __getpwcompat __P((int, uid_t, const char *)); static int __getpwcompat(type, uid, name) int type; uid_t uid; const char *name; { static const ns_dtab dtab[] = { NS_FILES_CB(_bad_getpw, "files") NS_DNS_CB(_dns_getpw, NULL) NS_NIS_CB(_nis_getpw, NULL) NS_COMPAT_CB(_bad_getpw, "compat") { 0 } }; static const ns_src defaultnis[] = { { NSSRC_NIS, NS_SUCCESS }, { 0 } }; switch (type) { case _PW_KEYBYNUM: return nsdispatch(NULL, dtab, NSDB_PASSWD_COMPAT, "getpwcompat", defaultnis, type); case _PW_KEYBYNAME: _DIAGASSERT(name != NULL); return nsdispatch(NULL, dtab, NSDB_PASSWD_COMPAT, "getpwcompat", defaultnis, type, name); case _PW_KEYBYUID: return nsdispatch(NULL, dtab, NSDB_PASSWD_COMPAT, "getpwcompat", defaultnis, type, uid); default: abort(); /*NOTREACHED*/ } } #endif /* _PASSWD_COMPAT */ /* * compat implementation of getpwent() * varargs (ignored): * type, [ uid (type == _PW_KEYBYUID) | name (type == _PW_KEYBYNAME) ] */ static int _compat_getpwent __P((void *, void *, va_list)); /*ARGSUSED*/ static int _compat_getpwent(rv, cb_data, ap) void *rv; void *cb_data; va_list ap; { DBT key; int rval; char bf[sizeof(_pw_keynum) + 1]; #ifdef _PASSWD_COMPAT static char *name = NULL; const char *user, *host, *dom; int has_compatpw; #endif if (!_pw_db && !__initdb()) return NS_UNAVAIL; #ifdef _PASSWD_COMPAT has_compatpw = __has_compatpw(); again: if (has_compatpw && (__pwmode != PWMODE_NONE)) { int r; switch (__pwmode) { case PWMODE_FULL: r = __getpwcompat(_PW_KEYBYNUM, 0, NULL); if (r == NS_SUCCESS) return r; __pwmode = PWMODE_NONE; break; case PWMODE_NETGRP: r = getnetgrent(&host, &user, &dom); if (r == 0) { /* end of group */ endnetgrent(); __pwmode = PWMODE_NONE; break; } if (!user || !*user) break; r = __getpwcompat(_PW_KEYBYNAME, 0, user); if (r == NS_SUCCESS) return r; break; case PWMODE_USER: if (name == NULL) { __pwmode = PWMODE_NONE; break; } r = __getpwcompat(_PW_KEYBYNAME, 0, name); free(name); name = NULL; if (r == NS_SUCCESS) return r; break; case PWMODE_NONE: abort(); } goto again; } #endif if (_pw_keynum == -1) return NS_NOTFOUND; /* no more local records */ ++_pw_keynum; bf[0] = _PW_KEYBYNUM; memmove(bf + 1, &_pw_keynum, sizeof(_pw_keynum)); key.data = (u_char *)bf; key.size = sizeof(_pw_keynum) + 1; rval = __hashpw(&key); if (rval == NS_NOTFOUND) _pw_keynum = -1; /* flag `no more local records' */ else if (rval == NS_SUCCESS) { #ifdef _PASSWD_COMPAT /* if we don't have YP at all, don't bother. */ if (has_compatpw) { if(_pw_passwd.pw_name[0] == '+') { /* set the mode */ switch(_pw_passwd.pw_name[1]) { case '\0': __pwmode = PWMODE_FULL; break; case '@': __pwmode = PWMODE_NETGRP; setnetgrent(_pw_passwd.pw_name + 2); break; default: __pwmode = PWMODE_USER; name = strdup(_pw_passwd.pw_name + 1); break; } /* save the prototype */ __pwproto_set(); goto again; } else if(_pw_passwd.pw_name[0] == '-') { /* an attempted exclusion */ switch(_pw_passwd.pw_name[1]) { case '\0': break; case '@': setnetgrent(_pw_passwd.pw_name + 2); while(getnetgrent(&host, &user, &dom)) { if(user && *user) __pwexclude_add(user); } endnetgrent(); break; default: __pwexclude_add(_pw_passwd.pw_name + 1); break; } goto again; } } #endif } return (rval); } /* * compat implementation of getpwnam() and getpwuid() * varargs: type, [ uid (type == _PW_KEYBYUID) | name (type == _PW_KEYBYNAME) ] */ static int _compat_getpw __P((void *, void *, va_list)); static int _compat_getpw(rv, cb_data, ap) void *rv; void *cb_data; va_list ap; { #ifdef _PASSWD_COMPAT DBT key; int search, rval, r, s, keynum; uid_t uid; char bf[sizeof(keynum) + 1]; const char *name, *host, *user, *dom; #endif if (!_pw_db && !__initdb()) return NS_UNAVAIL; /* * If there isn't a compat token in the database, use files. */ #ifdef _PASSWD_COMPAT if (! __has_compatpw()) #endif return (_local_getpw(rv, cb_data, ap)); #ifdef _PASSWD_COMPAT search = va_arg(ap, int); uid = 0; name = NULL; rval = NS_NOTFOUND; switch (search) { case _PW_KEYBYNAME: name = va_arg(ap, const char *); break; case _PW_KEYBYUID: uid = va_arg(ap, uid_t); break; default: abort(); } for (s = -1, keynum = 1 ; ; keynum++) { bf[0] = _PW_KEYBYNUM; memmove(bf + 1, &keynum, sizeof(keynum)); key.data = (u_char *)bf; key.size = sizeof(keynum) + 1; if(__hashpw(&key) != NS_SUCCESS) break; switch(_pw_passwd.pw_name[0]) { case '+': /* save the prototype */ __pwproto_set(); switch(_pw_passwd.pw_name[1]) { case '\0': r = __getpwcompat(search, uid, name); if (r != NS_SUCCESS) continue; break; case '@': pwnam_netgrp: #if 0 /* XXX: is this a hangover from pre-nsswitch? */ if(__ypcurrent) { free(__ypcurrent); __ypcurrent = NULL; } #endif if (s == -1) /* first time */ setnetgrent(_pw_passwd.pw_name + 2); s = getnetgrent(&host, &user, &dom); if (s == 0) { /* end of group */ endnetgrent(); s = -1; continue; } if (!user || !*user) goto pwnam_netgrp; r = __getpwcompat(_PW_KEYBYNAME, 0, user); if (r == NS_UNAVAIL) return r; if (r == NS_NOTFOUND) { /* * just because this user is bad * it doesn't mean they all are. */ goto pwnam_netgrp; } break; default: user = _pw_passwd.pw_name + 1; r = __getpwcompat(_PW_KEYBYNAME, 0, user); if (r == NS_UNAVAIL) return r; if (r == NS_NOTFOUND) continue; break; } if(__pwexclude_is(_pw_passwd.pw_name)) { if(s == 1) /* inside netgroup */ goto pwnam_netgrp; continue; } break; case '-': /* attempted exclusion */ switch(_pw_passwd.pw_name[1]) { case '\0': break; case '@': setnetgrent(_pw_passwd.pw_name + 2); while(getnetgrent(&host, &user, &dom)) { if(user && *user) __pwexclude_add(user); } endnetgrent(); break; default: __pwexclude_add(_pw_passwd.pw_name + 1); break; } break; } if ((search == _PW_KEYBYNAME && strcmp(_pw_passwd.pw_name, name) == 0) || (search == _PW_KEYBYUID && _pw_passwd.pw_uid == uid)) { rval = NS_SUCCESS; break; } if(s == 1) /* inside netgroup */ goto pwnam_netgrp; continue; } __pwproto = (struct passwd *)NULL; if (!_pw_stayopen) { (void)(_pw_db->close)(_pw_db); _pw_db = (DB *)NULL; } if(__pwexclude != (DB *)NULL) { (void)(__pwexclude->close)(__pwexclude); __pwexclude = (DB *)NULL; } return rval; #endif /* _PASSWD_COMPAT */ } struct passwd * getpwent() { int r; static const ns_dtab dtab[] = { NS_FILES_CB(_local_getpw, NULL) NS_DNS_CB(_dns_getpw, NULL) NS_NIS_CB(_nis_getpw, NULL) NS_COMPAT_CB(_compat_getpwent, NULL) { 0 } }; r = nsdispatch(NULL, dtab, NSDB_PASSWD, "getpwent", compatsrc, _PW_KEYBYNUM); if (r != NS_SUCCESS) return (struct passwd *)NULL; return &_pw_passwd; } struct passwd * getpwnam(name) const char *name; { int r; static const ns_dtab dtab[] = { NS_FILES_CB(_local_getpw, NULL) NS_DNS_CB(_dns_getpw, NULL) NS_NIS_CB(_nis_getpw, NULL) NS_COMPAT_CB(_compat_getpw, NULL) { 0 } }; if (name == NULL || name[0] == '\0') return (struct passwd *)NULL; r = nsdispatch(NULL, dtab, NSDB_PASSWD, "getpwnam", compatsrc, _PW_KEYBYNAME, name); return (r == NS_SUCCESS ? &_pw_passwd : (struct passwd *)NULL); } struct passwd * getpwuid(uid) uid_t uid; { int r; static const ns_dtab dtab[] = { NS_FILES_CB(_local_getpw, NULL) NS_DNS_CB(_dns_getpw, NULL) NS_NIS_CB(_nis_getpw, NULL) NS_COMPAT_CB(_compat_getpw, NULL) { 0 } }; r = nsdispatch(NULL, dtab, NSDB_PASSWD, "getpwuid", compatsrc, _PW_KEYBYUID, uid); return (r == NS_SUCCESS ? &_pw_passwd : (struct passwd *)NULL); } int setpassent(stayopen) int stayopen; { _pw_keynum = 0; _pw_stayopen = stayopen; #ifdef YP __pwmode = PWMODE_NONE; if(__ypcurrent) free(__ypcurrent); __ypcurrent = NULL; _pw_ypdone = 0; #endif #ifdef HESIOD _pw_hesnum = 0; #endif #ifdef _PASSWD_COMPAT if(__pwexclude != (DB *)NULL) { (void)(__pwexclude->close)(__pwexclude); __pwexclude = (DB *)NULL; } __pwproto = (struct passwd *)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 _PASSWD_COMPAT __pwmode = PWMODE_NONE; #endif #ifdef YP if(__ypcurrent) free(__ypcurrent); __ypcurrent = NULL; _pw_ypdone = 0; #endif #ifdef HESIOD _pw_hesnum = 0; #endif #ifdef _PASSWD_COMPAT if(__pwexclude != (DB *)NULL) { (void)(__pwexclude->close)(__pwexclude); __pwexclude = (DB *)NULL; } __pwproto = (struct passwd *)NULL; #endif } static int __initdb() { static int warned; char *p; #ifdef _PASSWD_COMPAT __pwmode = PWMODE_NONE; #endif if (geteuid() == 0) { _pw_db = dbopen((p = _PATH_SMP_DB), O_RDONLY, 0, DB_HASH, NULL); if (_pw_db) return(1); } _pw_db = dbopen((p = _PATH_MP_DB), O_RDONLY, 0, DB_HASH, NULL); if (_pw_db) return 1; if (!warned) syslog(LOG_ERR, "%s: %m", p); warned = 1; return 0; } static int __hashpw(key) DBT *key; { char *p, *t, *oldbuf; static u_int max; static char *buf; DBT data; _DIAGASSERT(key != NULL); switch ((_pw_db->get)(_pw_db, key, &data, 0)) { case 0: break; /* found */ case 1: return NS_NOTFOUND; case -1: return NS_UNAVAIL; /* error in db routines */ default: abort(); } p = (char *)data.data; if (data.size > max) { max = roundup(data.size, 1024); oldbuf = buf; if ((buf = realloc(buf, max)) == NULL) { if (oldbuf != NULL) free(oldbuf); max = 0; return NS_UNAVAIL; } } /* THIS CODE MUST MATCH THAT IN pwd_mkdb. */ t = buf; #define EXPAND(e) e = t; while ((*t++ = *p++)); #define SCALAR(v) memmove(&(v), p, sizeof v); p += sizeof v EXPAND(_pw_passwd.pw_name); EXPAND(_pw_passwd.pw_passwd); SCALAR(_pw_passwd.pw_uid); SCALAR(_pw_passwd.pw_gid); SCALAR(_pw_passwd.pw_change); EXPAND(_pw_passwd.pw_class); EXPAND(_pw_passwd.pw_gecos); EXPAND(_pw_passwd.pw_dir); EXPAND(_pw_passwd.pw_shell); SCALAR(_pw_passwd.pw_expire); /* See if there's any data left. If so, read in flags. */ if (data.size > (p - (char *)data.data)) { SCALAR(_pw_flags); } else _pw_flags = _PASSWORD_NOUID|_PASSWORD_NOGID; /* default */ return NS_SUCCESS; }