1 /* 2 * Copyright (c) 1988, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef lint 35 static const char copyright[] = 36 "@(#) Copyright (c) 1988, 1993, 1994\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #ifndef lint 41 #if 0 42 static char sccsid[] = "@(#)passwd.c 8.3 (Berkeley) 4/2/94"; 43 #endif 44 static const char rcsid[] = 45 "$Id: passwd.c,v 1.12 1997/03/29 04:31:27 imp Exp $"; 46 #endif /* not lint */ 47 48 #include <err.h> 49 #include <errno.h> 50 #include <stdio.h> 51 #include <stdlib.h> 52 #include <string.h> 53 #include <unistd.h> 54 55 #ifdef YP 56 #include <pwd.h> 57 #include <pw_yp.h> 58 #include <rpcsvc/yp.h> 59 int __use_yp = 0; 60 int yp_errno = YP_TRUE; 61 extern int yp_passwd __P(( char * )); 62 #endif 63 64 #ifdef KERBEROS 65 #include "krb.h" 66 #endif 67 68 #include "extern.h" 69 70 static void usage __P((void)); 71 72 int use_local_passwd = 0; 73 74 int 75 main(argc, argv) 76 int argc; 77 char **argv; 78 { 79 int ch; 80 char *uname; 81 char *iflag = 0, *rflag = 0, *uflag = 0; 82 83 #ifdef YP 84 #ifdef KERBEROS 85 char realm[REALM_SZ]; 86 #define OPTIONS "d:h:lysfoi:r:u:" 87 #else 88 #define OPTIONS "d:h:lysfo" 89 #endif 90 #else 91 #ifdef KERBEROS 92 char realm[REALM_SZ]; 93 #define OPTIONS "li:r:u:" 94 #else 95 #define OPTIONS "l" 96 #endif 97 #endif 98 99 #ifdef YP 100 int res = 0; 101 102 if (strstr(argv[0], "yppasswd")) __use_yp = 1; 103 #endif 104 105 while ((ch = getopt(argc, argv, OPTIONS)) != -1) { 106 switch (ch) { 107 case 'l': /* change local password file */ 108 use_local_passwd = 1; 109 break; 110 #ifdef KERBEROS 111 case 'i': 112 iflag = optarg; 113 break; 114 case 'r': 115 rflag = optarg; 116 break; 117 case 'u': 118 uflag = optarg; 119 break; 120 #endif /* KERBEROS */ 121 #ifdef YP 122 case 'y': /* Change NIS password */ 123 __use_yp = 1; 124 break; 125 case 'd': /* Specify NIS domain. */ 126 #ifdef PARANOID 127 if (!getuid()) { 128 #endif 129 yp_domain = optarg; 130 if (yp_server == NULL) 131 yp_server = "localhost"; 132 #ifdef PARANOID 133 } else { 134 warnx("only the super-user may use the -d flag"); 135 } 136 #endif 137 break; 138 case 'h': /* Specify NIS server. */ 139 #ifdef PARANOID 140 if (!getuid()) { 141 #endif 142 yp_server = optarg; 143 #ifdef PARANOID 144 } else { 145 warnx("only the super-user may use the -h flag"); 146 } 147 #endif 148 break; 149 case 'o': 150 force_old++; 151 break; 152 #endif 153 default: 154 case '?': 155 usage(); 156 } 157 } 158 159 argc -= optind; 160 argv += optind; 161 162 if ((uname = getlogin()) == NULL) 163 err(1, "getlogin"); 164 165 switch(argc) { 166 case 0: 167 break; 168 case 1: 169 uname = argv[0]; 170 break; 171 default: 172 usage(); 173 } 174 175 #ifdef YP 176 /* 177 * If NIS is turned on in the password database, use it, else punt. 178 */ 179 #ifdef KERBEROS 180 if (__use_yp || (iflag == NULL && rflag == NULL && uflag == NULL)) { 181 #endif 182 res = use_yp(uname, 0, 0); 183 if (res == USER_YP_ONLY) { 184 if (!use_local_passwd) { 185 exit(yp_passwd(uname)); 186 } else { 187 /* 188 * Reject -l flag if NIS is turned on and the user 189 * doesn't exist in the local password database. 190 */ 191 errx(1, "unknown local user: %s", uname); 192 } 193 } else if (res == USER_LOCAL_ONLY) { 194 /* 195 * Reject -y flag if user only exists locally. 196 */ 197 if (__use_yp) 198 errx(1, "unknown NIS user: %s", uname); 199 } else if (res == USER_YP_AND_LOCAL) { 200 if (!use_local_passwd && (yp_in_pw_file || __use_yp)) 201 exit(yp_passwd(uname)); 202 } 203 #ifdef KERBEROS 204 } 205 #endif 206 #endif 207 208 if (!use_local_passwd) { 209 #ifdef KERBEROS 210 if(krb_get_lrealm(realm, 0) == KSUCCESS) { 211 fprintf(stderr, "realm %s\n", realm); 212 exit(krb_passwd(argv[0], iflag, rflag, uflag)); 213 } 214 #endif 215 } 216 exit(local_passwd(uname)); 217 } 218 219 static void 220 usage() 221 { 222 223 #ifdef YP 224 #ifdef KERBEROS 225 fprintf(stderr, "%s\n%s\n", 226 "usage: passwd [-l] [-i instance] [-r realm] [-u fullname]", 227 " passwd [-l] [-y] [-o] [-d domain [-h host]] [user]"); 228 #else 229 (void)fprintf(stderr, 230 "usage: passwd [-l] [-y] [-o] [-d domain [-h host]] [user]\n"); 231 #endif 232 #else 233 #ifdef KERBEROS 234 fprintf(stderr, 235 "usage: passwd [-l] [-i instance] [-r realm] [-u fullname] [user]\n"); 236 #else 237 (void)fprintf(stderr, "usage: passwd user\n"); 238 #endif 239 #endif 240 exit(1); 241 } 242