info_passwd.c revision 1.1
175115Sfenner/* $NetBSD: info_passwd.c,v 1.1 2008/09/19 20:07:16 christos Exp $ */ 275115Sfenner 375115Sfenner/* 475115Sfenner * Copyright (c) 1997-2007 Erez Zadok 575115Sfenner * Copyright (c) 1990 Jan-Simon Pendry 675115Sfenner * Copyright (c) 1990 Imperial College of Science, Technology & Medicine 775115Sfenner * Copyright (c) 1990 The Regents of the University of California. 875115Sfenner * All rights reserved. 975115Sfenner * 1075115Sfenner * This code is derived from software contributed to Berkeley by 1175115Sfenner * Jan-Simon Pendry at Imperial College, London. 1275115Sfenner * 13127668Sbms * Redistribution and use in source and binary forms, with or without 14168371Sthompsa * modification, are permitted provided that the following conditions 1575115Sfenner * are met: 1675115Sfenner * 1. Redistributions of source code must retain the above copyright 1775115Sfenner * notice, this list of conditions and the following disclaimer. 1875115Sfenner * 2. Redistributions in binary form must reproduce the above copyright 1975115Sfenner * notice, this list of conditions and the following disclaimer in the 2075115Sfenner * documentation and/or other materials provided with the distribution. 21127668Sbms * 3. All advertising materials mentioning features or use of this software 2275115Sfenner * must display the following acknowledgment: 2375115Sfenner * This product includes software developed by the University of 2475115Sfenner * California, Berkeley and its contributors. 2575115Sfenner * 4. Neither the name of the University nor the names of its contributors 2675115Sfenner * may be used to endorse or promote products derived from this software 2775115Sfenner * without specific prior written permission. 2875115Sfenner * 2975115Sfenner * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 3075115Sfenner * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 31168371Sthompsa * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 32168371Sthompsa * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 33168371Sthompsa * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 34168371Sthompsa * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 35168371Sthompsa * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 36168371Sthompsa * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 37168371Sthompsa * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 38168371Sthompsa * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 39168371Sthompsa * SUCH DAMAGE. 40168371Sthompsa * 41168371Sthompsa * 42168371Sthompsa * File: am-utils/amd/info_passwd.c 43168371Sthompsa * 44168371Sthompsa */ 45168371Sthompsa 46168371Sthompsa/* 47168371Sthompsa * Get info from password "file" 48168371Sthompsa * 49168371Sthompsa * This is experimental and probably doesn't do what you expect. 50168371Sthompsa */ 51168371Sthompsa 52168371Sthompsa#ifdef HAVE_CONFIG_H 53168371Sthompsa# include <config.h> 54168371Sthompsa#endif /* HAVE_CONFIG_H */ 55168371Sthompsa#include <am_defs.h> 56168371Sthompsa#include <amd.h> 57168371Sthompsa 58168371Sthompsa#define PASSWD_MAP "/etc/passwd" 59168371Sthompsa 60168371Sthompsa/* forward declarations */ 61168371Sthompsaint passwd_init(mnt_map *m, char *map, time_t *tp); 62168371Sthompsaint passwd_search(mnt_map *m, char *map, char *key, char **pval, time_t *tp); 63168371Sthompsa 64168371Sthompsa 65168371Sthompsa/* 66168371Sthompsa * Nothing to probe - check the map name is PASSWD_MAP. 67168371Sthompsa */ 68168371Sthompsaint 69168371Sthompsapasswd_init(mnt_map *m, char *map, time_t *tp) 70168371Sthompsa{ 71168371Sthompsa *tp = 0; 72168371Sthompsa 73168371Sthompsa /* 74168371Sthompsa * Recognize the old format "PASSWD_MAP" 75168371Sthompsa * Uses default return string 76168371Sthompsa * "type:=nfs;rfs:=/${var0}/${var1};rhost:=${var1};sublink:=${var2};fs:=${autodir}${var3}" 77168371Sthompsa */ 78168371Sthompsa if (STREQ(map, PASSWD_MAP)) 79168371Sthompsa return 0; 80168371Sthompsa /* 81168371Sthompsa * Recognize the new format "PASSWD_MAP:pval-format" 82168371Sthompsa */ 83168371Sthompsa if (!NSTREQ(map, PASSWD_MAP, sizeof(PASSWD_MAP) - 1)) 84168371Sthompsa return ENOENT; 85168371Sthompsa if (map[sizeof(PASSWD_MAP)-1] != ':') 86168371Sthompsa return ENOENT; 87168371Sthompsa 88168371Sthompsa return 0; 89168371Sthompsa} 90168371Sthompsa 91168371Sthompsa 92168371Sthompsa/* 9375115Sfenner * Grab the entry via the getpwname routine 9475115Sfenner * Modify time is ignored by passwd - XXX 95168371Sthompsa */ 96168371Sthompsaint 97168371Sthompsapasswd_search(mnt_map *m, char *map, char *key, char **pval, time_t *tp) 98168371Sthompsa{ 99168371Sthompsa char *dir = NULL; 100168371Sthompsa struct passwd *pw; 101168371Sthompsa 10275115Sfenner if (STREQ(key, "/defaults")) { 10375115Sfenner *pval = strdup("type:=nfs"); 10475115Sfenner return 0; 105168371Sthompsa } 10675115Sfenner pw = getpwnam(key); 107168371Sthompsa 108168371Sthompsa if (pw) { 10975115Sfenner /* 110168371Sthompsa * We chop the home directory up as follows: 111168371Sthompsa * /anydir/dom1/dom2/dom3/user 112168371Sthompsa * 11375115Sfenner * and return 114168371Sthompsa * rfs:=/anydir/dom3;rhost:=dom3.dom2.dom1;sublink:=user 115168371Sthompsa * and now have 116168371Sthompsa * var0:=pw-prefix:=anydir 117168371Sthompsa * var1:=pw-rhost:=dom3.dom2.dom1 11875115Sfenner * var2:=pw-user:=user 119168371Sthompsa * var3:=pw-home:=/anydir/dom1/dom2/dom3/user 120168371Sthompsa * 121168371Sthompsa * This allows cross-domain entries in your passwd file. 122168371Sthompsa * ... but forget about security! 123168371Sthompsa */ 124168371Sthompsa char *user; 12575115Sfenner char *p, *q; 126168371Sthompsa char val[MAXPATHLEN]; 127168371Sthompsa char rhost[MAXHOSTNAMELEN]; 128168371Sthompsa dir = strdup(pw->pw_dir); 129168371Sthompsa 130168371Sthompsa /* 131168371Sthompsa * Find user name. If no / then Invalid... 132168371Sthompsa */ 133168371Sthompsa user = strrchr(dir, '/'); 134168371Sthompsa if (!user) 135168371Sthompsa goto enoent; 13675115Sfenner *user++ = '\0'; 13775115Sfenner 138168371Sthompsa /* 139168371Sthompsa * Find start of host "path". If no / then Invalid... 140168371Sthompsa */ 141168371Sthompsa p = strchr(dir + 1, '/'); 142168371Sthompsa if (!p) 143168371Sthompsa goto enoent; 144168371Sthompsa *p++ = '\0'; 145168371Sthompsa 146168371Sthompsa /* 147168371Sthompsa * At this point, p is dom1/dom2/dom3 148168371Sthompsa * Copy, backwards, into rhost replacing 149168371Sthompsa * / with . 150168371Sthompsa */ 151168371Sthompsa rhost[0] = '\0'; 152168371Sthompsa do { 153168371Sthompsa q = strrchr(p, '/'); 154168371Sthompsa if (q) { 155168371Sthompsa xstrlcat(rhost, q + 1, sizeof(rhost)); 156168371Sthompsa xstrlcat(rhost, ".", sizeof(rhost)); 157168371Sthompsa *q = '\0'; 158168371Sthompsa } else { 159168371Sthompsa xstrlcat(rhost, p, sizeof(rhost)); 160168371Sthompsa } 161168371Sthompsa } while (q); 162168371Sthompsa 163168371Sthompsa /* 164168371Sthompsa * Sanity check 165168371Sthompsa */ 166168371Sthompsa if (*rhost == '\0' || *user == '\0' || *dir == '\0') 167168371Sthompsa goto enoent; 168168371Sthompsa 169168371Sthompsa /* 170168371Sthompsa * Make up return string 171168371Sthompsa */ 172168371Sthompsa q = strchr(rhost, '.'); 173168371Sthompsa if (q) 174168371Sthompsa *q = '\0'; 175168371Sthompsa p = strchr(map, ':'); 176168371Sthompsa if (p) 177168371Sthompsa p++; 178168371Sthompsa else 179168371Sthompsa p = "type:=nfs;rfs:=/${var0}/${var1};rhost:=${var1};sublink:=${var2};fs:=${autodir}${var3}"; 180168371Sthompsa xsnprintf(val, sizeof(val), "var0:=%s;var1:=%s;var2:=%s;var3:=%s;%s", 181168371Sthompsa dir+1, rhost, user, pw->pw_dir, p); 182168371Sthompsa dlog("passwd_search: map=%s key=%s -> %s", map, key, val); 183168371Sthompsa if (q) 184168371Sthompsa *q = '.'; 185168371Sthompsa *pval = strdup(val); 186168371Sthompsa return 0; 187168371Sthompsa } 188168371Sthompsa 189168371Sthompsaenoent: 190168371Sthompsa if (dir) 191168371Sthompsa XFREE(dir); 192168371Sthompsa 193168371Sthompsa return ENOENT; 194168371Sthompsa} 19575115Sfenner