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yppasswdd_mkpw.c revision 1.8 
      1 /*	$NetBSD: yppasswdd_mkpw.c,v 1.8 2000/12/08 22:23:14 tron Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1996 Jason R. Thorpe <thorpej (at) NetBSD.ORG>
      5  * All rights reserved.
      6  *
      7  * Copyright (c) 1994 Mats O Jansson <moj (at) stacken.kth.se>
      8  * All rights reserved.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *	This product includes software developed by Mats O Jansson
     21  * 4. The name of the author may not be used to endorse or promote products
     22  *    derived from this software without specific prior written permission.
     23  *
     24  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
     25  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     26  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
     28  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     34  * SUCH DAMAGE.
     35  */
     36 
     37 #include <sys/cdefs.h>
     38 #ifndef lint
     39 __RCSID("$NetBSD: yppasswdd_mkpw.c,v 1.8 2000/12/08 22:23:14 tron Exp $");
     40 #endif /* not lint */
     41 
     42 #include <sys/types.h>
     43 #include <sys/param.h>
     44 #include <sys/stat.h>
     45 #include <sys/time.h>
     46 #include <sys/resource.h>
     47 #include <sys/wait.h>
     48 
     49 #include <err.h>
     50 #include <fcntl.h>
     51 #include <stdio.h>
     52 #include <pwd.h>
     53 #include <signal.h>
     54 #include <stdlib.h>
     55 #include <string.h>
     56 #include <unistd.h>
     57 #include <util.h>
     58 #include <limits.h>
     59 
     60 #include <rpc/rpc.h>
     61 #include <rpc/xdr.h>
     62 #include <rpcsvc/yppasswd.h>
     63 
     64 #include "extern.h"
     65 
     66 int	handling_request;		/* simple mutex */
     67 
     68 void
     69 make_passwd(yppasswd *argp, struct svc_req *rqstp, SVCXPRT *transp)
     70 {
     71 	struct passwd *pw;
     72 	int pfd, tfd;
     73 	char mpwd[MAXPATHLEN];
     74 
     75 #define REPLY(val)	do { \
     76 		int res = (val); \
     77 		if (!svc_sendreply(transp, xdr_int, (caddr_t)&res)) \
     78 			svcerr_systemerr(transp); \
     79 	} while (0)
     80 
     81 #define RETURN(val)	do { \
     82 		REPLY((val)); \
     83 		handling_request = 0; \
     84 		return; \
     85 	} while (0)
     86 
     87 	if (handling_request) {
     88 		warnx("already handling request; try again later");
     89 		REPLY(1);
     90 		return;
     91 	}
     92 	handling_request = 1;
     93 
     94 	pw = getpwnam(argp->newpw.pw_name);
     95 	if (!pw)
     96 		RETURN(1);
     97 
     98 	if (*pw->pw_passwd &&
     99 	    strcmp(crypt(argp->oldpass, pw->pw_passwd), pw->pw_passwd) != 0)
    100 		RETURN(1);
    101 
    102 	pw_init();
    103 	tfd = pw_lock(0);
    104 	if (tfd < 0) {
    105 		warnx("the passwd file is busy.");
    106 		RETURN(1);
    107 	}
    108 	(void)strlcpy(mpwd, pw_getprefix(), sizeof(mpwd));
    109 	(void)strlcat(mpwd, _PATH_MASTERPASSWD, sizeof(mpwd));
    110 	pfd = open(mpwd, O_RDONLY, 0);
    111 	if (pfd < 0) {
    112 		pw_abort();
    113 		warnx("%s", mpwd);
    114 		RETURN(1);
    115 	}
    116 
    117 	/*
    118 	 * Get the new password.  Reset passwd change time to zero; when
    119 	 * classes are implemented, go and get the "offset" value for this
    120 	 * class and reset the timer.
    121 	 */
    122 	if (!nopw) {
    123 		pw->pw_passwd = argp->newpw.pw_passwd;
    124 		pw->pw_change = 0;
    125 	}
    126 	if (!nogecos)
    127 		pw->pw_gecos = argp->newpw.pw_gecos;
    128 	if (!noshell)
    129 		pw->pw_shell = argp->newpw.pw_shell;
    130 
    131 	pw_copy(pfd, tfd, pw, NULL);
    132 
    133 	if (pw_mkdb() < 0) {
    134 		warnx("pw_mkdb failed");
    135 		pw_abort();
    136 		RETURN(1);
    137 	}
    138 
    139 	/* XXX RESTORE SIGNAL STATE? XXX */
    140 
    141 	/* Notify caller we succeeded. */
    142 	REPLY(0);
    143 
    144 	/* Update the YP maps. */
    145 	if (chdir("/var/yp"))
    146 		err(EXIT_FAILURE, "/var/yp");
    147 	(void) umask(022);
    148 	(void) system(make_arg);
    149 
    150 	handling_request = 0;
    151 }
    152