usr.sbin/rpc.yppasswdd/rpc.yppasswdd.c

   1 /*      $NetBSD: rpc.yppasswdd.c,v 1.12 2009/04/19 04:01:06 lukem Exp $ */
   2
   3 /*
   4  * Copyright (c) 1994 Mats O Jansson <moj@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  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
  17  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  18  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  20  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  */
  28
  29 #include <sys/cdefs.h>
  30 #ifndef lint
  31 __RCSID("$NetBSD: rpc.yppasswdd.c,v 1.12 2009/04/19 04:01:06 lukem Exp $");
  32 #endif /* not lint */
  33
  34 #include <sys/types.h>
  35 #include <sys/wait.h>
  36
  37 #include <err.h>
  38 #include <errno.h>
  39 #include <limits.h>
  40 #include <stdio.h>
  41 #include <stdlib.h>
  42 #include <string.h>
  43 #include <signal.h>
  44 #include <unistd.h>
  45 #include <util.h>
  46
  47 #include <rpc/rpc.h>
  48 #include <rpc/pmap_clnt.h>
  49 #include <rpcsvc/yppasswd.h>
  50
  51 #include "extern.h"
  52
  53 int     noshell, nogecos, nopw;
  54 char    make_arg[_POSIX2_LINE_MAX] = "make";
  55
  56 int     main(int, char *[]);
  57 void    yppasswddprog_1(struct svc_req *, SVCXPRT *);
  58 void    usage(void);
  59
  60 int
  61 main(int argc, char *argv[])
  62 {
  63         SVCXPRT *transp;
  64         int i;
  65         char *arg;
  66         int maxrec = RPC_MAXDATASIZE;
  67
  68         for (i = 1; i < argc; i++) {
  69                 arg = argv[i];
  70                 if (*arg++ != '-')
  71                         usage();
  72                 if (strcmp("d", arg) == 0)
  73                         if (++i == argc)
  74                                 usage();
  75                         else {
  76                                 if (pw_setprefix(argv[i]) < 0)
  77                                         err(EXIT_FAILURE,NULL);
  78                         }
  79                 else if (strcmp("noshell", arg) == 0)
  80                         noshell = 1;
  81                 else if (strcmp("nogecos", arg) == 0)
  82                         nogecos = 1;
  83                 else if (strcmp("nopw", arg) == 0)
  84                         nopw = 1;
  85                 else if (strcmp("m", arg) == 0) {
  86                         int len;
  87
  88                         len = strlen(make_arg);
  89                         if (++i == argc)
  90                                 usage();
  91                         for (; i < argc; i++) {
  92                                 int arglen;
  93
  94                                 arglen = strlen(argv[i]);
  95                                 if ((len + arglen) > (int)(sizeof(make_arg) - 2))
  96                                         errx(EXIT_FAILURE, strerror(E2BIG));
  97                                 make_arg[len++] = ' ';
  98                                 (void)strcpy(&make_arg[len], argv[i]);
  99                                 len += arglen;
 100                         }
 101                 } else
 102                         usage();
 103         }
 104
 105         if (daemon(0, 0))
 106                 err(EXIT_FAILURE, "can't detach");
 107         pidfile(NULL);
 108
 109         rpc_control(RPC_SVC_CONNMAXREC_SET, &maxrec);
 110
 111         (void)pmap_unset(YPPASSWDPROG, YPPASSWDVERS);
 112
 113         transp = svcudp_create(RPC_ANYSOCK);
 114         if (transp == NULL)
 115                 errx(EXIT_FAILURE, "cannot create UDP service");
 116
 117         if (!svc_register(transp, YPPASSWDPROG, YPPASSWDVERS, yppasswddprog_1,
 118             IPPROTO_UDP))
 119                 errx(EXIT_FAILURE,
 120                     "unable to register YPPASSWDPROG/YPPASSWDVERS/UDP");
 121
 122         transp = svctcp_create(RPC_ANYSOCK, RPC_MAXDATASIZE, RPC_MAXDATASIZE);
 123         if (transp == NULL)
 124                 errx(EXIT_FAILURE, "cannot create TCP service");
 125
 126         if (!svc_register(transp, YPPASSWDPROG, YPPASSWDVERS, yppasswddprog_1,
 127             IPPROTO_TCP))
 128                 errx(EXIT_FAILURE,
 129                     "unable to register YPPASSWDPROG/YPPASSWDVERS/TCP");
 130
 131         svc_run();
 132         errx(EXIT_FAILURE, "svc_run returned");
 133         /* NOTREACHED */
 134 }
 135
 136 void
 137 yppasswddprog_1(struct svc_req *rqstp, SVCXPRT *transp)
 138 {
 139         union {
 140                 yppasswd yppasswdproc_update_1_arg;
 141         } argument;
 142
 143         switch (rqstp->rq_proc) {
 144         case NULLPROC:
 145                 (void)svc_sendreply(transp, xdr_void, (char *) NULL);
 146                 return;
 147
 148         case YPPASSWDPROC_UPDATE:
 149                 /*
 150                  * We'd like this to look like a regular RPC
 151                  * stub, but we have to send the reply in the
 152                  * handler in order to avoid both signal race
 153                  * conditions locally and timeouts on the
 154                  * client.
 155                  */
 156                 (void)memset(&argument, 0, sizeof(argument));
 157                 if (!svc_getargs(transp, xdr_yppasswd, (caddr_t) & argument)) {
 158                         svcerr_decode(transp);
 159                         return;
 160                 }
 161                 make_passwd((yppasswd *)&argument, rqstp, transp);
 162                 if (!svc_freeargs(transp, xdr_yppasswd, (caddr_t) &argument))
 163                         errx(EXIT_FAILURE, "unable to free arguments");
 164                 return;
 165         }
 166
 167         svcerr_noproc(transp);
 168 }
 169
 170 void
 171 usage(void)
 172 {
 173
 174         fprintf(stderr, "usage: %s [-d directory] [-noshell] [-nogecos] "
 175             "[-nopw] [-m arg1 [arg2 ...]]\n", getprogname());
 176         exit(EXIT_FAILURE);
 177 }