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yppasswdd_mkpw.c revision 1.10 
      1 /*	$NetBSD: yppasswdd_mkpw.c,v 1.10 2002/07/31 14:41:56 bouyer 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 1.10 2002/07/31 14:41:56 bouyer 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 	char buf[8192]; /* from libutil */
     75 	FILE *fpw;
     76 
     77 #define REPLY(val)	do { \
     78 		int res = (val); \
     79 		if (!svc_sendreply(transp, xdr_int, (caddr_t)&res)) \
     80 			svcerr_systemerr(transp); \
     81 	} while (0)
     82 
     83 #define RETURN(val)	do { \
     84 		REPLY((val)); \
     85 		handling_request = 0; \
     86 		return; \
     87 	} while (0)
     88 
     89 	if (handling_request) {
     90 		warnx("already handling request; try again later");
     91 		REPLY(1);
     92 		return;
     93 	}
     94 	handling_request = 1;
     95 
     96 	(void)strlcpy(mpwd, pw_getprefix(), sizeof(mpwd));
     97 	(void)strlcat(mpwd, _PATH_MASTERPASSWD, sizeof(mpwd));
     98 	fpw = fopen(mpwd, "r");
     99 	if (fpw == NULL) {
    100 		warnx("%s", mpwd);
    101 		RETURN(1);
    102 	}
    103 	for(;;) {
    104 		if (fgets(buf, sizeof(buf), fpw) == NULL) {
    105 			if (feof(fpw))
    106 				warnx("%s: %s not found", mpwd,
    107 				    argp->newpw.pw_name);
    108 			else
    109 				warnx("%s: %s", mpwd, strerror(errno));
    110 			RETURN(1);
    111 		}
    112 		if (pw_scan(buf, &pw, NULL) == 0)
    113 			continue;
    114 		if (strncmp(argp->newpw.pw_name, pw.pw_name, MAXLOGNAME) == 0)
    115 			break;
    116 	}
    117 	fclose(fpw);
    118 	if (*pw.pw_passwd &&
    119 	    strcmp(crypt(argp->oldpass, pw.pw_passwd), pw.pw_passwd) != 0)
    120 		RETURN(1);
    121 
    122 	pw_init();
    123 	tfd = pw_lock(0);
    124 	if (tfd < 0) {
    125 		warnx("the passwd file is busy.");
    126 		RETURN(1);
    127 	}
    128 	pfd = open(mpwd, O_RDONLY, 0);
    129 	if (pfd < 0) {
    130 		pw_abort();
    131 		warnx("%s", mpwd);
    132 		RETURN(1);
    133 	}
    134 
    135 	/*
    136 	 * Get the new password.  Reset passwd change time to zero; when
    137 	 * classes are implemented, go and get the "offset" value for this
    138 	 * class and reset the timer.
    139 	 */
    140 	if (!nopw) {
    141 		pw.pw_passwd = argp->newpw.pw_passwd;
    142 		pw.pw_change = 0;
    143 	}
    144 	if (!nogecos)
    145 		pw.pw_gecos = argp->newpw.pw_gecos;
    146 	if (!noshell)
    147 		pw.pw_shell = argp->newpw.pw_shell;
    148 
    149 	pw_copy(pfd, tfd, &pw, NULL);
    150 
    151 	if (pw_mkdb(pw.pw_name, 0) < 0) {
    152 		warnx("pw_mkdb failed");
    153 		pw_abort();
    154 		RETURN(1);
    155 	}
    156 
    157 	/* XXX RESTORE SIGNAL STATE? XXX */
    158 
    159 	/* Notify caller we succeeded. */
    160 	REPLY(0);
    161 
    162 	/* Update the YP maps. */
    163 	if (chdir("/var/yp"))
    164 		err(EXIT_FAILURE, "/var/yp");
    165 	(void) umask(022);
    166 	(void) system(make_arg);
    167 
    168 	handling_request = 0;
    169 }
    170