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passwd.c revision 1.4 
      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 1.4 1993/08/01 18:10:20 mycroft 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 #ifdef KERBEROS
     55 int use_kerberos = 1;
     56 #else
     57 int use_kerberos = 0;
     58 #endif
     59 #ifdef YP
     60 int force_yp = 0;
     61 int use_yp;
     62 #else
     63 int use_yp = 0;
     64 #endif
     65 
     66 main(argc, argv)
     67 	int argc;
     68 	char **argv;
     69 {
     70 	extern int optind;
     71 	register int ch;
     72 	char *uname;
     73         int status;
     74 
     75 #ifdef	YP
     76         use_yp = _yp_check(NULL);
     77 #endif
     78 
     79 	while ((ch = getopt(argc, argv, "lky")) != EOF)
     80 		switch (ch) {
     81 		case 'l':		/* change local password file */
     82 			use_kerberos = 0;
     83 			use_yp = 0;
     84 			break;
     85 		case 'k':		/* change Kerberos password */
     86 #ifdef	KERBEROS
     87 			use_kerberos = 1;
     88 			use_yp = 0;
     89 			break;
     90 #else
     91                         usage();
     92                         exit(1);
     93 #endif
     94 		case 'y':		/* change YP password */
     95 #ifdef	YP
     96                         if (!use_yp) {
     97                                 fprintf(stderr, "passwd: YP not in use.\n");
     98                                 usage();
     99                                 exit(1);
    100                         }
    101 
    102                         /* XXX Maybe just exec yppasswd ?? */
    103 			use_kerberos = 0;
    104 			use_yp = 1;
    105                         force_yp = 1;
    106 			break;
    107 #else
    108                         usage();
    109                         exit(1);
    110 #endif
    111 		default:
    112 		case '?':
    113 			usage();
    114 			exit(1);
    115 		}
    116 
    117 	argc -= optind;
    118 	argv += optind;
    119 
    120 	uname = getlogin();
    121         if (uname == NULL) {
    122                 fprintf(stderr, "passwd: who are you ??\n");
    123                 exit(1);
    124         }
    125 
    126 	switch(argc) {
    127 	case 0:
    128 		break;
    129 	case 1:
    130 #ifdef	KERBEROS
    131 		if (use_kerberos && strcmp(argv[1], uname)) {
    132 			(void)fprintf(stderr, "passwd: %s\n\t%s\n%s\n",
    133 "to change another user's Kerberos password, do",
    134 "\"kinit user; passwd; kdestroy\";",
    135 "to change a user's local passwd, use \"passwd -l user\"");
    136 			exit(1);
    137 		}
    138 #endif
    139 		uname = argv[0];
    140 		break;
    141 	default:
    142 		usage();
    143 		exit(1);
    144 	}
    145 
    146 #ifdef	KERBEROS
    147 	if (use_kerberos)
    148 		exit(krb_passwd());
    149 #endif
    150 #ifdef	YP
    151         if (force_yp || ((status = local_passwd(uname)) && use_yp))
    152 		exit(yp_passwd(uname));
    153         exit(status);
    154 #endif
    155 	exit(local_passwd(uname));
    156 }
    157 
    158 usage()
    159 {
    160 #if	defined(KERBEROS) && defined(YP)
    161 	(void)fprintf(stderr, "usage: passwd [-l] [-k] [-y] user\n");
    162 #else	/* !(KERBEROS && YP) */
    163 #if	defined(KERBEROS) || defined(YP)
    164 	(void)fprintf(stderr, "usage: passwd [-l] user\n");
    165 #else
    166 	(void)fprintf(stderr, "usage: passwd user\n");
    167 #endif
    168 #endif	/* KERBEROS && YP */
    169 }
    170