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rpc.yppasswdd.c revision 1.6 
      1 /*	$NetBSD: rpc.yppasswdd.c,v 1.6 2000/12/08 21:24:16 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 1.6 2000/12/08 21:24:16 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 			i++;
     89 			for (; i < argc; i++) {
     90 				int arglen;
     91 
     92 				arglen = strlen(argv[i]);
     93 				if ((len + arglen) > (sizeof(make_arg) - 2))
     94 					errx(EXIT_FAILURE, strerror(E2BIG));
     95 				make_arg[len++] = ' ';
     96 				(void)strcpy(&make_arg[len], argv[i]);
     97 				len += arglen;
     98 			}
     99 		} else
    100 			usage();
    101 	}
    102 
    103 	if (daemon(0, 0))
    104 		err(EXIT_FAILURE, "can't detach");
    105 	pidfile(NULL);
    106 
    107 	(void)pmap_unset(YPPASSWDPROG, YPPASSWDVERS);
    108 
    109 	transp = svcudp_create(RPC_ANYSOCK);
    110 	if (transp == NULL)
    111 		errx(EXIT_FAILURE, "cannot create UDP service");
    112 
    113 	if (!svc_register(transp, YPPASSWDPROG, YPPASSWDVERS, yppasswddprog_1,
    114 	    IPPROTO_UDP))
    115 		errx(EXIT_FAILURE,
    116 		    "unable to register YPPASSWDPROG/YPPASSWDVERS/UDP");
    117 
    118 	transp = svctcp_create(RPC_ANYSOCK, 0, 0);
    119 	if (transp == NULL)
    120 		errx(EXIT_FAILURE, "cannot create TCP service");
    121 
    122 	if (!svc_register(transp, YPPASSWDPROG, YPPASSWDVERS, yppasswddprog_1,
    123 	    IPPROTO_TCP))
    124 		errx(EXIT_FAILURE,
    125 		    "unable to register YPPASSWDPROG/YPPASSWDVERS/TCP");
    126 
    127 	svc_run();
    128 	errx(EXIT_FAILURE, "svc_run returned");
    129 	/* NOTREACHED */
    130 }
    131 
    132 void
    133 yppasswddprog_1(struct svc_req *rqstp, SVCXPRT *transp)
    134 {
    135 	union {
    136 		yppasswd yppasswdproc_update_1_arg;
    137 	} argument;
    138 
    139 	switch (rqstp->rq_proc) {
    140 	case NULLPROC:
    141 		(void)svc_sendreply(transp, xdr_void, (char *) NULL);
    142 		return;
    143 
    144 	case YPPASSWDPROC_UPDATE:
    145 		/*
    146 		 * We'd like this to look like a regular RPC
    147 		 * stub, but we have to send the reply in the
    148 		 * handler in order to avoid both signal race
    149 		 * conditions locally and timeouts on the
    150 		 * client.
    151 		 */
    152 		(void)memset(&argument, 0, sizeof(argument));
    153 		if (!svc_getargs(transp, xdr_yppasswd, (caddr_t) & argument)) {
    154 			svcerr_decode(transp);
    155 			return;
    156 		}
    157 		make_passwd((yppasswd *)&argument, rqstp, transp);
    158 		if (!svc_freeargs(transp, xdr_yppasswd, (caddr_t) &argument))
    159 			errx(EXIT_FAILURE, "unable to free arguments");
    160 		return;
    161 	}
    162 
    163 	svcerr_noproc(transp);
    164 }
    165 
    166 void
    167 usage(void)
    168 {
    169 
    170 	fprintf(stderr, "usage: %s [-noshell] [-nogecos] [-nopw] "
    171 	    "[-m arg1 arg2 ...]\n", __progname);
    172 	exit(EXIT_FAILURE);
    173 }
    174