/* * Copyright (c) 1995, 1996 * Bill Paul . All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Bill Paul. * 4. Neither the name of the author nor the names of any co-contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * $FreeBSD: src/usr.sbin/rpc.yppasswdd/yppasswdd_main.c,v 1.27 2008/10/30 01:54:31 rafan Exp $ */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* getenv, exit */ #include /* strcmp */ #include #include #include #include #include /* for pmap_unset */ #include #include #include "yppasswd.h" #include "yppasswdd_extern.h" #include "yppasswd_private.h" #include "ypxfr_extern.h" #include "yp_extern.h" #ifndef SIG_PF #define SIG_PF void(*)(int) #endif #ifdef DEBUG #define RPC_SVC_FG #endif #define _RPCSVC_CLOSEDOWN 120 int _rpcpmstart = 0; /* Started by a port monitor ? */ static int _rpcfdtype; /* Whether Stream or Datagram ? */ /* States a server can be in wrt request */ #define _IDLE 0 #define _SERVED 1 #define _SERVING 2 int debug; static char _localhost[] = "localhost"; static char _passwd_byname[] = "passwd.byname"; extern int _rpcsvcstate; /* Set when a request is serviced */ static char _progname[] = "rpc.yppasswdd"; char *progname = _progname; static char _yp_dir[] = _PATH_YP; const char *yp_dir = _yp_dir; static char _passfile_default[] = _PATH_YP "master.passwd"; char *passfile_default = _passfile_default; char *passfile; char *yppasswd_domain = NULL; int no_chsh = 0; int no_chfn = 0; int allow_additions = 0; int multidomain = 0; int verbose = 0; int resvport = 1; int inplace = 0; char sockname[] = YP_SOCKNAME; static void terminate(int sig __unused) { rpcb_unset(YPPASSWDPROG, YPPASSWDVERS, NULL); rpcb_unset(MASTER_YPPASSWDPROG, MASTER_YPPASSWDVERS, NULL); unlink(sockname); exit(0); } static void reload(int sig __unused) { load_securenets(); } static void closedown(int sig __unused) { if (_rpcsvcstate == _IDLE) { extern fd_set svc_fdset; static int size; int i, openfd; if (_rpcfdtype == SOCK_DGRAM) { unlink(sockname); exit(0); } if (size == 0) { size = getdtablesize(); } for (i = 0, openfd = 0; i < size && openfd < 2; i++) if (FD_ISSET(i, &svc_fdset)) openfd++; if (openfd <= 1) { unlink(sockname); exit(0); } } if (_rpcsvcstate == _SERVED) _rpcsvcstate = _IDLE; signal(SIGALRM, (SIG_PF) closedown); alarm(_RPCSVC_CLOSEDOWN/2); } static void usage(void) { fprintf(stderr, "%s\n%s\n", "usage: rpc.yppasswdd [-t master.passwd file] [-d domain] [-p path] [-s]", " [-f] [-m] [-i] [-a] [-v] [-u] [-h]"); exit(1); } int main(int argc, char *argv[]) { struct rlimit rlim; SVCXPRT *transp = NULL; struct sockaddr_in saddr; socklen_t asize = sizeof (saddr); struct netconfig *nconf; struct sigaction sa; void *localhandle; int ch; char *mastername; char myname[MAXHOSTNAMELEN + 2]; int maxrec = RPC_MAXDATASIZE; debug = 1; while ((ch = getopt(argc, argv, "t:d:p:sfamuivh")) != -1) { switch (ch) { case 't': passfile_default = optarg; break; case 'd': yppasswd_domain = optarg; break; case 's': no_chsh++; break; case 'f': no_chfn++; break; case 'p': yp_dir = optarg; break; case 'a': allow_additions++; break; case 'm': multidomain++; break; case 'i': inplace++; break; case 'v': verbose++; break; case 'u': resvport = 0; break; default: case 'h': usage(); break; } } if (yppasswd_domain == NULL) { if (yp_get_default_domain(&yppasswd_domain)) { yp_error("no domain specified and system domain \ name isn't set -- aborting"); usage(); } } load_securenets(); if (getrpcport(_localhost, YPPROG, YPVERS, IPPROTO_UDP) <= 0) { yp_error("no ypserv processes registered with local portmap"); yp_error("this host is not an NIS server -- aborting"); exit(1); } if ((mastername = ypxfr_get_master(yppasswd_domain, _passwd_byname, _localhost, 0)) == NULL) { yp_error("can't get name of NIS master server for domain %s", yppasswd_domain); exit(1); } if (gethostname((char *)&myname, sizeof(myname)) == -1) { yp_error("can't get local hostname: %s", strerror(errno)); exit(1); } if (strncasecmp(mastername, (char *)&myname, sizeof(myname))) { yp_error("master of %s is %s, but we are %s", "passwd.byname", mastername, myname); yp_error("this host is not the NIS master server for \ the %s domain -- aborting", yppasswd_domain); exit(1); } debug = 0; if (getsockname(0, (struct sockaddr *)&saddr, &asize) == 0) { socklen_t ssize = sizeof (int); if (saddr.sin_family != AF_INET) exit(1); if (getsockopt(0, SOL_SOCKET, SO_TYPE, (char *)&_rpcfdtype, &ssize) == -1) exit(1); _rpcpmstart = 1; } if (!debug && _rpcpmstart == 0) { if (daemon(0,0)) { err(1,"cannot fork"); } } openlog("rpc.yppasswdd", LOG_PID, LOG_DAEMON); memset(&sa, 0, sizeof(sa)); sa.sa_flags = SA_NOCLDWAIT; sigaction(SIGCHLD, &sa, NULL); rpcb_unset(YPPASSWDPROG, YPPASSWDVERS, NULL); rpcb_unset(MASTER_YPPASSWDPROG, MASTER_YPPASSWDVERS, NULL); rpc_control(RPC_SVC_CONNMAXREC_SET, &maxrec); if (svc_create(yppasswdprog_1, YPPASSWDPROG, YPPASSWDVERS, "netpath") == 0) { yp_error("cannot create yppasswd service."); exit(1); } if (svc_create(master_yppasswdprog_1, MASTER_YPPASSWDPROG, MASTER_YPPASSWDVERS, "netpath") == 0) { yp_error("cannot create master_yppasswd service."); exit(1); } nconf = NULL; localhandle = setnetconfig(); while ((nconf = getnetconfig(localhandle)) != NULL) { if (nconf->nc_protofmly != NULL && strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) break; } if (nconf == NULL) { yp_error("getnetconfigent unix: %s", nc_sperror()); exit(1); } unlink(sockname); transp = svcunix_create(RPC_ANYSOCK, 0, 0, sockname); if (transp == NULL) { yp_error("cannot create AF_LOCAL service."); exit(1); } if (!svc_reg(transp, MASTER_YPPASSWDPROG, MASTER_YPPASSWDVERS, master_yppasswdprog_1, nconf)) { yp_error("unable to register (MASTER_YPPASSWDPROG, \ MASTER_YPPASSWDVERS, unix)."); exit(1); } endnetconfig(localhandle); /* Only root may connect() to the AF_UNIX link. */ if (chmod(sockname, 0)) err(1, "chmod of %s failed", sockname); if (transp == NULL) { yp_error("could not create a handle"); exit(1); } if (_rpcpmstart) { signal(SIGALRM, (SIG_PF) closedown); alarm(_RPCSVC_CLOSEDOWN/2); } /* Unlimited resource limits. */ rlim.rlim_cur = rlim.rlim_max = RLIM_INFINITY; setrlimit(RLIMIT_CPU, &rlim); setrlimit(RLIMIT_FSIZE, &rlim); setrlimit(RLIMIT_STACK, &rlim); setrlimit(RLIMIT_DATA, &rlim); setrlimit(RLIMIT_RSS, &rlim); /* Don't drop core (not really necessary, but GP's). */ rlim.rlim_cur = rlim.rlim_max = 0; setrlimit(RLIMIT_CORE, &rlim); /* Turn off signals. */ signal(SIGALRM, SIG_IGN); signal(SIGHUP, (SIG_PF) reload); signal(SIGINT, SIG_IGN); signal(SIGPIPE, SIG_IGN); signal(SIGQUIT, SIG_IGN); signal(SIGTERM, (SIG_PF) terminate); svc_run(); yp_error("svc_run returned"); exit(1); /* NOTREACHED */ }