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passwd.c revision 1.6 
      1 /*
      2  * Copyright (c) 1988 The Regents of the University of California.
      3  * 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 char copyright[] =
     36 "@(#) Copyright (c) 1988 The Regents of the University of California.\n\
     37  All rights reserved.\n";
     38 #endif /* not lint */
     39 
     40 #ifndef lint
     41 /*static char sccsid[] = "from: @(#)passwd.c	5.5 (Berkeley) 7/6/91";*/
     42 static char rcsid[] = "$Id: passwd.c,v 1.6 1994/07/27 03:28:23 brezak Exp $";
     43 #endif /* not lint */
     44 
     45 #include <stdio.h>
     46 #include <unistd.h>
     47 
     48 /*
     49  * Note on configuration:
     50  *      Generally one would not use both Kerberos and YP
     51  *      to maintain passwords.
     52  *
     53  */
     54 
     55 int use_kerberos;
     56 int use_yp;
     57 
     58 #ifdef YP
     59 int force_yp;
     60 #endif
     61 
     62 main(argc, argv)
     63 	int argc;
     64 	char **argv;
     65 {
     66 	extern int optind;
     67 	register int ch;
     68 	char *username;
     69 	int status = 0;
     70 
     71 #if defined(KERBEROS) || defined(KERBEROS5)
     72 	use_kerberos = 1;
     73 #endif
     74 #ifdef	YP
     75 	use_yp = _yp_check(NULL);
     76 #endif
     77 
     78 	while ((ch = getopt(argc, argv, "lky")) != EOF)
     79 		switch (ch) {
     80 		case 'l':		/* change local password file */
     81 			use_kerberos = 0;
     82 			use_yp = 0;
     83 			break;
     84 		case 'k':		/* change Kerberos password */
     85 #if defined(KERBEROS) || defined(KERBEROS5)
     86 			use_kerberos = 1;
     87 			use_yp = 0;
     88 			break;
     89 #else
     90 			fprintf(stderr, "passwd: Kerberos not compiled in\n");
     91 			exit(1);
     92 #endif
     93 		case 'y':		/* change YP password */
     94 #ifdef	YP
     95 			if (!use_yp) {
     96 				fprintf(stderr, "passwd: YP not in use.\n");
     97 				exit(1);
     98 			}
     99 			use_kerberos = 0;
    100 			use_yp = 1;
    101 			force_yp = 1;
    102 			break;
    103 #else
    104 			fprintf(stderr, "passwd: YP not compiled in\n");
    105 			exit(1);
    106 #endif
    107 		default:
    108 			usage();
    109 			exit(1);
    110 		}
    111 
    112 	argc -= optind;
    113 	argv += optind;
    114 
    115 	username = getlogin();
    116 	if (username == NULL) {
    117 		fprintf(stderr, "passwd: who are you ??\n");
    118 		exit(1);
    119 	}
    120 
    121 	switch(argc) {
    122 	case 0:
    123 		break;
    124 	case 1:
    125 #if defined(KERBEROS) || defined(KERBEROS5)
    126 		if (use_kerberos && strcmp(argv[0], username)) {
    127 			(void)fprintf(stderr, "passwd: %s\n\t%s\n%s\n",
    128 "to change another user's Kerberos password, do",
    129 "\"kinit <user>; passwd; kdestroy\";",
    130 "to change a user's local passwd, use \"passwd -l <user>\"");
    131 			exit(1);
    132 		}
    133 #endif
    134 		username = argv[0];
    135 		break;
    136 	default:
    137 		usage();
    138 		exit(1);
    139 	}
    140 
    141 #if defined(KERBEROS) || defined(KERBEROS5)
    142 	if (use_kerberos)
    143 		exit(krb_passwd());
    144 #endif
    145 #ifdef	YP
    146 	if (force_yp || ((status = local_passwd(username)) && use_yp))
    147 		exit(yp_passwd(username));
    148 	exit(status);
    149 #endif
    150 	exit(local_passwd(username));
    151 }
    152 
    153 usage()
    154 {
    155 	fprintf(stderr, "usage: passwd [-l] [-k] [-y] user\n");
    156 }
    157