1 /* $OpenBSD: passwd.c,v 1.7 1998/01/20 15:32:21 art Exp $ */ 2 3 /* 4 * Copyright (c) 1988 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #ifndef lint 37 char copyright[] = 38 "@(#) Copyright (c) 1988 The Regents of the University of California.\n\ 39 All rights reserved.\n"; 40 #endif /* not lint */ 41 42 #ifndef lint 43 /*static char sccsid[] = "from: @(#)passwd.c 5.5 (Berkeley) 7/6/91";*/ 44 static char rcsid[] = "$OpenBSD: passwd.c,v 1.7 1998/01/20 15:32:21 art Exp $"; 45 #endif /* not lint */ 46 47 #include <stdio.h> 48 #include <string.h> 49 #include <unistd.h> 50 #ifdef KERBEROS 51 #include <kerberosIV/krb.h> 52 #endif 53 54 /* 55 * Note on configuration: 56 * Generally one would not use both Kerberos and YP 57 * to maintain passwords. 58 * 59 */ 60 61 int use_kerberos; 62 int use_yp; 63 64 #ifdef YP 65 int force_yp; 66 #endif 67 68 69 extern int local_passwd(char *); 70 extern int yp_passwd(char *); 71 extern int krb_passwd(int, char **); 72 void usage(void); 73 74 75 int 76 main(argc, argv) 77 int argc; 78 char **argv; 79 { 80 extern int optind; 81 register int ch; 82 char *username; 83 int status = 0; 84 #if defined(KERBEROS) || defined(KERBEROS5) 85 extern char realm[]; 86 87 if (krb_get_lrealm(realm,1) == KSUCCESS) 88 use_kerberos = 1; 89 #endif 90 #ifdef YP 91 use_yp = _yp_check(NULL); 92 #endif 93 94 /* Process args and options */ 95 while ((ch = getopt(argc, argv, "lyk")) != -1) 96 switch (ch) { 97 case 'l': /* change local password file */ 98 use_kerberos = 0; 99 use_yp = 0; 100 break; 101 case 'k': /* change Kerberos password */ 102 #if defined(KERBEROS) || defined(KERBEROS5) 103 use_kerberos = 1; 104 use_yp = 0; 105 exit(krb_passwd(argc, argv)); 106 break; 107 #else 108 fprintf(stderr, "passwd: Kerberos not compiled in\n"); 109 exit(1); 110 #endif 111 case 'y': /* change YP password */ 112 #ifdef YP 113 if (!use_yp) { 114 fprintf(stderr, "passwd: YP not in use.\n"); 115 exit(1); 116 } 117 use_kerberos = 0; 118 use_yp = 1; 119 force_yp = 1; 120 break; 121 #else 122 fprintf(stderr, "passwd: YP not compiled in\n"); 123 exit(1); 124 #endif 125 default: 126 usage(); 127 exit(1); 128 } 129 130 argc -= optind; 131 argv += optind; 132 133 username = getlogin(); 134 if (username == NULL) { 135 fprintf(stderr, "passwd: who are you ??\n"); 136 exit(1); 137 } 138 139 switch(argc) { 140 case 0: 141 break; 142 case 1: 143 #if defined(KERBEROS) || defined(KERBEROS5) 144 if (use_kerberos && strcmp(argv[0], username)) { 145 (void)fprintf(stderr, "passwd: %s\n\t%s\n%s\n", 146 "to change another user's Kerberos password, do", 147 "\"passwd -k -u <user>\";", 148 "to change a user's local passwd, use \"passwd -l <user>\""); 149 exit(1); 150 } 151 #endif 152 username = argv[0]; 153 break; 154 default: 155 usage(); 156 exit(1); 157 } 158 159 #if defined(KERBEROS) || defined(KERBEROS5) 160 if (use_kerberos) 161 exit(krb_passwd(argc, argv)); 162 #endif 163 164 #ifdef YP 165 if (force_yp || ((status = local_passwd(username)) && use_yp)) 166 exit(yp_passwd(username)); 167 exit(status); 168 #endif 169 exit(local_passwd(username)); 170 } 171 172 void 173 usage(void) 174 { 175 fprintf(stderr, "usage: passwd [-l] [-y] [-k [-n name] [-i instance] [-r realm] [-u username[.instance][@realm]] [user]\n"); 176 } 177