1 /* 2 * Copyright (c) 1990 Jan-Simon Pendry 3 * Copyright (c) 1990 Imperial College of Science, Technology & Medicine 4 * Copyright (c) 1990, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Jan-Simon Pendry at Imperial College, London. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * from: @(#)info_passwd.c 8.1 (Berkeley) 6/6/93 35 * $Id: info_passwd.c,v 1.8 2010/03/30 17:10:37 zinovik Exp $ 36 */ 37 38 /* 39 * Get info from password "file" 40 * 41 * This is experimental and probably doesn't 42 * do what you expect. 43 */ 44 45 #include "am.h" 46 47 #ifdef HAS_PASSWD_MAPS 48 #include <pwd.h> 49 50 #define PASSWD_MAP "/etc/passwd" 51 52 /* 53 * Nothing to probe - check the map name is PASSWD_MAP. 54 */ 55 int 56 passwd_init(char *map, time_t *tp) 57 { 58 *tp = 0; 59 return strcmp(map, PASSWD_MAP) == 0 ? 0 : ENOENT; 60 } 61 62 63 /* 64 * Grab the entry via the getpwname routine 65 * Modify time is ignored by passwd - XXX 66 */ 67 int 68 passwd_search(mnt_map *m, char *map, char *key, char **pval, time_t *tp) 69 { 70 struct passwd *pw; 71 char *dir = 0; 72 73 if (strcmp(key, "/defaults") == 0) { 74 *pval = strdup("type:=nfs"); 75 return 0; 76 } 77 78 pw = getpwnam(key); 79 if (pw) { 80 /* 81 * We chop the home directory up as follows: 82 * /anydir/dom1/dom2/dom3/user 83 * 84 * and return 85 * rfs:=/anydir/dom3;rhost:=dom3.dom2.dom1;sublink:=user 86 * 87 * This allows cross-domain entries in your passwd file. 88 * ... but forget about security! 89 */ 90 char val[MAXPATHLEN], rhost[MAXHOSTNAMELEN]; 91 char *user, *p, *q; 92 93 dir = strdup(pw->pw_dir); 94 /* 95 * Find user name. If no / then Invalid... 96 */ 97 user = strrchr(dir, '/'); 98 if (!user) 99 goto enoent; 100 *user++ = '\0'; 101 /* 102 * Find start of host "path". If no / then Invalid... 103 */ 104 p = strchr(dir+1, '/'); 105 if (!p) 106 goto enoent; 107 *p++ = '\0'; 108 /* 109 * At this point, p is dom1/dom2/dom3 110 * Copy, backwards, into rhost replacing 111 * / with . 112 */ 113 rhost[0] = '\0'; 114 do { 115 q = strrchr(p, '/'); 116 if (q) { 117 strlcat(rhost, q + 1, sizeof(rhost)); 118 strlcat(rhost, ".", sizeof(rhost)); 119 *q = '\0'; 120 } else { 121 strlcat(rhost, p, sizeof(rhost)); 122 } 123 } while (q); 124 125 /* 126 * Sanity check 127 */ 128 if (*rhost == '\0' || *user == '\0' || *dir == '\0') 129 goto enoent; 130 /* 131 * Make up return string 132 */ 133 q = strchr(rhost, '.'); 134 if (q) 135 *q = '\0'; 136 snprintf(val, sizeof(val), 137 "rfs:=%s/%s;rhost:=%s;sublink:=%s;fs:=${autodir}%s", 138 dir, rhost, rhost, user, pw->pw_dir); 139 free(dir); 140 if (q) 141 *q = '.'; 142 *pval = strdup(val); 143 return 0; 144 } 145 146 enoent: 147 if (dir) 148 free(dir); 149 150 return ENOENT; 151 } 152 #endif /* HAS_PASSWD_MAPS */ 153