Home | History | Annotate | Line # | Download | only in rpc.yppasswdd 
      1 /*	$NetBSD: yppasswdd_mkpw.c,v 1.18 2011/08/30 17:06:22 plunky 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  *
     19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
     20  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     21  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
     23  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29  * SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 #ifndef lint
     34 __RCSID("$NetBSD: yppasswdd_mkpw.c,v 1.18 2011/08/30 17:06:22 plunky Exp $");
     35 #endif /* not lint */
     36 
     37 #include <sys/types.h>
     38 #include <sys/param.h>
     39 #include <sys/stat.h>
     40 #include <sys/time.h>
     41 #include <sys/resource.h>
     42 #include <sys/wait.h>
     43 
     44 #include <err.h>
     45 #include <errno.h>
     46 #include <fcntl.h>
     47 #include <stdio.h>
     48 #include <pwd.h>
     49 #include <signal.h>
     50 #include <stdlib.h>
     51 #include <string.h>
     52 #include <unistd.h>
     53 #include <util.h>
     54 #include <limits.h>
     55 
     56 #include <rpc/rpc.h>
     57 #include <rpc/xdr.h>
     58 #include <rpcsvc/yppasswd.h>
     59 
     60 #include "extern.h"
     61 
     62 int	handling_request;		/* simple mutex */
     63 
     64 void
     65 make_passwd(yppasswd *argp, struct svc_req *rqstp, SVCXPRT *transp)
     66 {
     67 	struct passwd pw;
     68 	int pfd, tfd;
     69 	char mpwd[MAXPATHLEN];
     70 	char buf[8192]; /* from libutil */
     71 	char *p;
     72 	int lineno;
     73 	FILE *fpw;
     74 
     75 #define REPLY(val)	do { \
     76 		int res = (val); \
     77 		if (!svc_sendreply(transp, (xdrproc_t)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 	(void)strlcpy(mpwd, pw_getprefix(), sizeof(mpwd));
     95 	(void)strlcat(mpwd, _PATH_MASTERPASSWD, sizeof(mpwd));
     96 	fpw = fopen(mpwd, "r");
     97 	if (fpw == NULL) {
     98 		warnx("%s", mpwd);
     99 		RETURN(1);
    100 	}
    101 	for(lineno = 1; ; lineno++) {
    102 		if (fgets(buf, sizeof(buf), fpw) == NULL) {
    103 			if (feof(fpw))
    104 				warnx("%s: %s not found", mpwd,
    105 				    argp->newpw.pw_name);
    106 			else
    107 				warnx("%s: %s", mpwd, strerror(errno));
    108 			(void)fclose(fpw);
    109 			RETURN(1);
    110 		}
    111 		if ((p = strchr(buf, '\n')) == NULL) {
    112 			warnx("line %d too long", lineno);
    113 			(void)fclose(fpw);
    114 			RETURN(1);
    115 		}
    116 		/* get rid of trailing \n */
    117 		*p = '\0';
    118 		if (pw_scan(buf, &pw, NULL) == 0)
    119 			continue;
    120 		if (strncmp(argp->newpw.pw_name, pw.pw_name, MAXLOGNAME) == 0)
    121 			break;
    122 	}
    123 	fclose(fpw);
    124 	if (*pw.pw_passwd &&
    125 	    strcmp(crypt(argp->oldpass, pw.pw_passwd), pw.pw_passwd) != 0)
    126 		RETURN(1);
    127 
    128 	pw_init();
    129 	tfd = pw_lock(0);
    130 	if (tfd < 0) {
    131 		warnx("the passwd file is busy.");
    132 		RETURN(1);
    133 	}
    134 	pfd = open(mpwd, O_RDONLY, 0);
    135 	if (pfd < 0) {
    136 		pw_abort();
    137 		warnx("%s", mpwd);
    138 		RETURN(1);
    139 	}
    140 
    141 	/*
    142 	 * Get the new password.  Reset passwd change time to zero; when
    143 	 * classes are implemented, go and get the "offset" value for this
    144 	 * class and reset the timer.
    145 	 */
    146 	if (!nopw) {
    147 		pw.pw_passwd = argp->newpw.pw_passwd;
    148 		pw.pw_change = 0;
    149 	}
    150 	if (!nogecos)
    151 		pw.pw_gecos = argp->newpw.pw_gecos;
    152 	if (!noshell)
    153 		pw.pw_shell = argp->newpw.pw_shell;
    154 
    155 	pw_copy(pfd, tfd, &pw, NULL);
    156 
    157 	if (pw_mkdb(pw.pw_name, 0) < 0) {
    158 		warnx("pw_mkdb failed");
    159 		pw_abort();
    160 		RETURN(1);
    161 	}
    162 
    163 	/* XXX RESTORE SIGNAL STATE? XXX */
    164 
    165 	/* Notify caller we succeeded. */
    166 	REPLY(0);
    167 
    168 	/* Update the YP maps. */
    169 	if (chdir("/var/yp"))
    170 		err(EXIT_FAILURE, "/var/yp");
    171 	(void) umask(022);
    172 	(void) system(make_arg);
    173 
    174 	handling_request = 0;
    175 }
    176