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passwd.c revision 1.7 
      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 1.7 1995/02/12 17:45:56 phil Exp $";
     43 #endif /* not lint */
     44 
     45 #include <stdio.h>
     46 #include <string.h>
     47 #include <unistd.h>
     48 
     49 /*
     50  * Note on configuration:
     51  *      Generally one would not use both Kerberos and YP
     52  *      to maintain passwords.
     53  *
     54  */
     55 
     56 int use_kerberos;
     57 int use_yp;
     58 
     59 #ifdef YP
     60 int force_yp;
     61 #endif
     62 
     63 main(argc, argv)
     64 	int argc;
     65 	char **argv;
     66 {
     67 	extern int optind;
     68 	register int ch;
     69 	char *username;
     70 	int status = 0;
     71 	char *basename;
     72 
     73 #if defined(KERBEROS) || defined(KERBEROS5)
     74 	use_kerberos = 1;
     75 #endif
     76 #ifdef	YP
     77 	use_yp = _yp_check(NULL);
     78 #endif
     79 
     80 	basename = strrchr(argv[0], '/');
     81 	if (basename == NULL)
     82 		basename = argv[0];
     83 	if (strcmp(basename, "yppasswd") == 0) {
     84 #ifdef YP
     85 		if (!use_yp) {
     86 			fprintf(stderr, "yppasswd: YP not in use.\n");
     87 			exit (1);
     88 		}
     89 		use_kerberos = 0;
     90 		use_yp = 1;
     91 		force_yp = 1;
     92 #else
     93 		fprintf(stderr, "yppasswd: YP not compiled in\n");
     94 		exit(1);
     95 #endif
     96 	}
     97 
     98 
     99 	while ((ch = getopt(argc, argv, "lky")) != EOF)
    100 		switch (ch) {
    101 		case 'l':		/* change local password file */
    102 			use_kerberos = 0;
    103 			use_yp = 0;
    104 			break;
    105 		case 'k':		/* change Kerberos password */
    106 #if defined(KERBEROS) || defined(KERBEROS5)
    107 			use_kerberos = 1;
    108 			use_yp = 0;
    109 			break;
    110 #else
    111 			fprintf(stderr, "passwd: Kerberos not compiled in\n");
    112 			exit(1);
    113 #endif
    114 		case 'y':		/* change YP password */
    115 #ifdef	YP
    116 			if (!use_yp) {
    117 				fprintf(stderr, "passwd: YP not in use.\n");
    118 				exit(1);
    119 			}
    120 			use_kerberos = 0;
    121 			use_yp = 1;
    122 			force_yp = 1;
    123 			break;
    124 #else
    125 			fprintf(stderr, "passwd: YP not compiled in\n");
    126 			exit(1);
    127 #endif
    128 		default:
    129 			usage();
    130 			exit(1);
    131 		}
    132 
    133 	argc -= optind;
    134 	argv += optind;
    135 
    136 	username = getlogin();
    137 	if (username == NULL) {
    138 		fprintf(stderr, "passwd: who are you ??\n");
    139 		exit(1);
    140 	}
    141 
    142 	switch(argc) {
    143 	case 0:
    144 		break;
    145 	case 1:
    146 #if defined(KERBEROS) || defined(KERBEROS5)
    147 		if (use_kerberos && strcmp(argv[0], username)) {
    148 			(void)fprintf(stderr, "passwd: %s\n\t%s\n%s\n",
    149 "to change another user's Kerberos password, do",
    150 "\"kinit <user>; passwd; kdestroy\";",
    151 "to change a user's local passwd, use \"passwd -l <user>\"");
    152 			exit(1);
    153 		}
    154 #endif
    155 		username = argv[0];
    156 		break;
    157 	default:
    158 		usage();
    159 		exit(1);
    160 	}
    161 
    162 #if defined(KERBEROS) || defined(KERBEROS5)
    163 	if (use_kerberos)
    164 		exit(krb_passwd());
    165 #endif
    166 #ifdef	YP
    167 	if (force_yp || ((status = local_passwd(username)) && use_yp))
    168 		exit(yp_passwd(username));
    169 	exit(status);
    170 #endif
    171 	exit(local_passwd(username));
    172 }
    173 
    174 usage()
    175 {
    176 	fprintf(stderr, "usage: passwd [-l] [-k] [-y] user\n");
    177 }
    178