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yppasswdd_mkpw.c revision 1.6 
      1 /*	$NetBSD: yppasswdd_mkpw.c,v 1.6 2000/07/07 15:11:47 itojun 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/types.h>
     38 #include <sys/stat.h>
     39 #include <sys/time.h>
     40 #include <sys/resource.h>
     41 #include <sys/wait.h>
     42 #include <err.h>
     43 #include <fcntl.h>
     44 #include <stdio.h>
     45 #include <pwd.h>
     46 #include <signal.h>
     47 #include <stdlib.h>
     48 #include <string.h>
     49 #include <unistd.h>
     50 #include <util.h>
     51 
     52 #include <rpc/rpc.h>
     53 #include <rpc/xdr.h>
     54 #include <rpcsvc/yppasswd.h>
     55 
     56 extern int noshell;
     57 extern int nogecos;
     58 extern int nopw;
     59 extern int make;
     60 extern char make_arg[];
     61 
     62 void	make_passwd __P((yppasswd *, struct svc_req *, SVCXPRT *));
     63 
     64 int	handling_request;		/* simple mutex */
     65 
     66 void
     67 make_passwd(argp, rqstp, transp)
     68 	yppasswd *argp;
     69 	struct svc_req *rqstp;
     70 	SVCXPRT *transp;
     71 {
     72 	struct passwd *pw;
     73 	int pfd, tfd;
     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 	pfd = open(_PATH_MASTERPASSWD, O_RDONLY, 0);
    109 	if (pfd < 0) {
    110 		pw_abort();
    111 		warnx("%s", _PATH_MASTERPASSWD);
    112 		RETURN(1);
    113 	}
    114 
    115 	/*
    116 	 * Get the new password.  Reset passwd change time to zero; when
    117 	 * classes are implemented, go and get the "offset" value for this
    118 	 * class and reset the timer.
    119 	 */
    120 	if (!nopw) {
    121 		pw->pw_passwd = argp->newpw.pw_passwd;
    122 		pw->pw_change = 0;
    123 	}
    124 	if (!nogecos)
    125 		pw->pw_gecos = argp->newpw.pw_gecos;
    126 	if (!noshell)
    127 		pw->pw_shell = argp->newpw.pw_shell;
    128 
    129 	pw_copy(pfd, tfd, pw, NULL);
    130 
    131 	if (pw_mkdb() < 0) {
    132 		warnx("pw_mkdb failed");
    133 		pw_abort();
    134 		RETURN(1);
    135 	}
    136 
    137 	/* XXX RESTORE SIGNAL STATE? XXX */
    138 
    139 	/* Notify caller we succeeded. */
    140 	REPLY(0);
    141 
    142 	/* Update the YP maps. */
    143 	if (chdir("/var/yp"))
    144 		err(1, "/var/yp");
    145 	(void) umask(022);
    146 	(void) system(make_arg);
    147 
    148 	handling_request = 0;
    149 }
    150