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rpc.yppasswdd.c revision 1.7 
      1 /*	$NetBSD: rpc.yppasswdd.c,v 1.7 2000/12/08 21:51:21 tron Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1994 Mats O Jansson <moj (at) stacken.kth.se>
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by Mats O Jansson
     18  * 4. The name of the author may not be used to endorse or promote products
     19  *    derived from this software without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
     22  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     23  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
     25  * 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 #include <sys/cdefs.h>
     35 #ifndef lint
     36 __RCSID("$NetBSD: rpc.yppasswdd.c,v 1.7 2000/12/08 21:51:21 tron Exp $");
     37 #endif /* not lint */
     38 
     39 #include <sys/types.h>
     40 #include <sys/wait.h>
     41 
     42 #include <err.h>
     43 #include <errno.h>
     44 #include <limits.h>
     45 #include <stdio.h>
     46 #include <stdlib.h>
     47 #include <string.h>
     48 #include <signal.h>
     49 #include <unistd.h>
     50 #include <util.h>
     51 
     52 #include <rpc/rpc.h>
     53 #include <rpc/pmap_clnt.h>
     54 #include <rpcsvc/yppasswd.h>
     55 
     56 #include "extern.h"
     57 
     58 extern	char *__progname;		/* from crt0.s */
     59 
     60 int	noshell, nogecos, nopw;
     61 char	make_arg[_POSIX2_LINE_MAX] = "make";
     62 
     63 int	main(int, char *[]);
     64 void	yppasswddprog_1(struct svc_req *, SVCXPRT *);
     65 void	usage(void);
     66 
     67 int
     68 main(int argc, char *argv[])
     69 {
     70 	SVCXPRT *transp;
     71 	int i;
     72 	char *arg;
     73 
     74 	for (i = 1; i < argc; i++) {
     75 		arg = argv[i];
     76 		if (*arg++ != '-')
     77 			usage();
     78 		if (strcmp("noshell", arg) == 0)
     79 			noshell = 1;
     80 		else if (strcmp("nogecos", arg) == 0)
     81 			nogecos = 1;
     82 		else if (strcmp("nopw", arg) == 0)
     83 			nopw = 1;
     84 		else if (strcmp("m", arg) == 0) {
     85 			int len;
     86 
     87 			len = strlen(make_arg);
     88 			if (++i == argc)
     89 				usage();
     90 			for (; i < argc; i++) {
     91 				int arglen;
     92 
     93 				arglen = strlen(argv[i]);
     94 				if ((len + arglen) > (sizeof(make_arg) - 2))
     95 					errx(EXIT_FAILURE, strerror(E2BIG));
     96 				make_arg[len++] = ' ';
     97 				(void)strcpy(&make_arg[len], argv[i]);
     98 				len += arglen;
     99 			}
    100 		} else
    101 			usage();
    102 	}
    103 
    104 	if (daemon(0, 0))
    105 		err(EXIT_FAILURE, "can't detach");
    106 	pidfile(NULL);
    107 
    108 	(void)pmap_unset(YPPASSWDPROG, YPPASSWDVERS);
    109 
    110 	transp = svcudp_create(RPC_ANYSOCK);
    111 	if (transp == NULL)
    112 		errx(EXIT_FAILURE, "cannot create UDP service");
    113 
    114 	if (!svc_register(transp, YPPASSWDPROG, YPPASSWDVERS, yppasswddprog_1,
    115 	    IPPROTO_UDP))
    116 		errx(EXIT_FAILURE,
    117 		    "unable to register YPPASSWDPROG/YPPASSWDVERS/UDP");
    118 
    119 	transp = svctcp_create(RPC_ANYSOCK, 0, 0);
    120 	if (transp == NULL)
    121 		errx(EXIT_FAILURE, "cannot create TCP service");
    122 
    123 	if (!svc_register(transp, YPPASSWDPROG, YPPASSWDVERS, yppasswddprog_1,
    124 	    IPPROTO_TCP))
    125 		errx(EXIT_FAILURE,
    126 		    "unable to register YPPASSWDPROG/YPPASSWDVERS/TCP");
    127 
    128 	svc_run();
    129 	errx(EXIT_FAILURE, "svc_run returned");
    130 	/* NOTREACHED */
    131 }
    132 
    133 void
    134 yppasswddprog_1(struct svc_req *rqstp, SVCXPRT *transp)
    135 {
    136 	union {
    137 		yppasswd yppasswdproc_update_1_arg;
    138 	} argument;
    139 
    140 	switch (rqstp->rq_proc) {
    141 	case NULLPROC:
    142 		(void)svc_sendreply(transp, xdr_void, (char *) NULL);
    143 		return;
    144 
    145 	case YPPASSWDPROC_UPDATE:
    146 		/*
    147 		 * We'd like this to look like a regular RPC
    148 		 * stub, but we have to send the reply in the
    149 		 * handler in order to avoid both signal race
    150 		 * conditions locally and timeouts on the
    151 		 * client.
    152 		 */
    153 		(void)memset(&argument, 0, sizeof(argument));
    154 		if (!svc_getargs(transp, xdr_yppasswd, (caddr_t) & argument)) {
    155 			svcerr_decode(transp);
    156 			return;
    157 		}
    158 		make_passwd((yppasswd *)&argument, rqstp, transp);
    159 		if (!svc_freeargs(transp, xdr_yppasswd, (caddr_t) &argument))
    160 			errx(EXIT_FAILURE, "unable to free arguments");
    161 		return;
    162 	}
    163 
    164 	svcerr_noproc(transp);
    165 }
    166 
    167 void
    168 usage(void)
    169 {
    170 
    171 	fprintf(stderr, "usage: %s [-noshell] [-nogecos] [-nopw] "
    172 	    "[-m arg1 [arg2 ...]]\n", __progname);
    173 	exit(EXIT_FAILURE);
    174 }
    175