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passwd.c revision 1.1 
      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[] = "@(#)passwd.c	5.5 (Berkeley) 7/6/91";
     42 #endif /* not lint */
     43 
     44 #include <stdio.h>
     45 #include <unistd.h>
     46 
     47 #ifdef KERBEROS
     48 int use_kerberos = 1;
     49 #endif
     50 
     51 main(argc, argv)
     52 	int argc;
     53 	char **argv;
     54 {
     55 	extern int optind;
     56 	register int ch;
     57 	char *uname;
     58 
     59 #ifdef KERBEROS
     60 	while ((ch = getopt(argc, argv, "l")) != EOF)
     61 		switch (ch) {
     62 		case 'l':		/* change local password file */
     63 			use_kerberos = 0;
     64 			break;
     65 #else
     66 	while ((ch = getopt(argc, argv, "")) != EOF)
     67 		switch (ch) {
     68 #endif
     69 		default:
     70 		case '?':
     71 			usage();
     72 			exit(1);
     73 		}
     74 
     75 	argc -= optind;
     76 	argv += optind;
     77 
     78 	uname = getlogin();
     79 
     80 	switch(argc) {
     81 	case 0:
     82 		break;
     83 	case 1:
     84 #ifdef	KERBEROS
     85 		if (use_kerberos && strcmp(argv[1], uname)) {
     86 			(void)fprintf(stderr, "passwd: %s\n\t%s\n%s\n",
     87 "to change another user's Kerberos password, do",
     88 "\"kinit user; passwd; kdestroy\";",
     89 "to change a user's local passwd, use \"passwd -l user\"");
     90 			exit(1);
     91 		}
     92 #endif
     93 		uname = argv[0];
     94 		break;
     95 	default:
     96 		usage();
     97 		exit(1);
     98 	}
     99 
    100 #ifdef	KERBEROS
    101 	if (use_kerberos)
    102 		exit(krb_passwd());
    103 #endif
    104 	exit(local_passwd(uname));
    105 }
    106 
    107 usage()
    108 {
    109 #ifdef	KERBEROS
    110 	(void)fprintf(stderr, "usage: passwd [-l] user\n");
    111 #else
    112 	(void)fprintf(stderr, "usage: passwd user\n");
    113 #endif
    114 }
    115