/* * Copyright (c) 1992, 1993 Theo de Raadt * 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 Theo de Raadt. * 4. The name of the author may not be used to endorse or promote * products derived from this software without specific prior written * permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 THE AUTHOR 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. */ #ifndef LINT static char rcsid[] = "$Id: ypbind.c,v 1.2 1995/10/18 10:58:58 deraadt Exp $"; #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define BINDINGDIR "/var/yp/binding" #define YPBINDLOCK "/var/run/ypbind.lock" struct _dom_binding { struct _dom_binding *dom_pnext; char dom_domain[YPMAXDOMAIN + 1]; struct sockaddr_in dom_server_addr; unsigned short int dom_server_port; int dom_socket; CLIENT *dom_client; long int dom_vers; time_t dom_check_t; time_t dom_ask_t; int dom_lockfd; int dom_alive; int dom_xid; }; extern bool_t xdr_domainname(), xdr_ypbind_resp(); extern bool_t xdr_ypreq_key(), xdr_ypresp_val(); extern bool_t xdr_ypbind_setdom(); char *domainname; struct _dom_binding *ypbindlist; int check; #define YPSET_NO 0 #define YPSET_LOCAL 1 #define YPSET_ALL 2 int ypsetmode = YPSET_NO; int rpcsock, pingsock; struct rmtcallargs rmtca; struct rmtcallres rmtcr; char rmtcr_outval; u_long rmtcr_port; SVCXPRT *udptransp, *tcptransp; void * ypbindproc_null_2(transp, argp, clnt) SVCXPRT *transp; void *argp; CLIENT *clnt; { static char res; memset(&res, 0, sizeof(res)); return (void *)&res; } struct ypbind_resp * ypbindproc_domain_2(transp, argp, clnt) SVCXPRT *transp; char *argp; CLIENT *clnt; { static struct ypbind_resp res; struct _dom_binding *ypdb; char path[MAXPATHLEN]; time_t now; memset(&res, 0, sizeof res); res.ypbind_status = YPBIND_FAIL_VAL; for (ypdb = ypbindlist; ypdb; ypdb = ypdb->dom_pnext) if (!strcmp(ypdb->dom_domain, argp)) break; if (ypdb == NULL) { ypdb = (struct _dom_binding *)malloc(sizeof *ypdb); memset(ypdb, 0, sizeof *ypdb); strncpy(ypdb->dom_domain, argp, sizeof ypdb->dom_domain); ypdb->dom_vers = YPVERS; ypdb->dom_alive = 0; ypdb->dom_lockfd = -1; sprintf(path, "%s/%s.%d", BINDINGDIR, ypdb->dom_domain, ypdb->dom_vers); unlink(path); ypdb->dom_pnext = ypbindlist; ypbindlist = ypdb; check++; return NULL; } if (ypdb->dom_alive == 0) return NULL; #ifdef HEURISTIC time(&now); if (now < ypdb->dom_ask_t + 5) { /* * Hmm. More than 2 requests in 5 seconds have indicated * that my binding is possibly incorrect. * Ok, do an immediate poll of the server. */ if (ypdb->dom_check_t >= now) { /* don't flood it */ ypdb->dom_check_t = 0; check++; } } ypdb->dom_ask_t = now; #endif answer: res.ypbind_status = YPBIND_SUCC_VAL; res.ypbind_respbody.ypbind_bindinfo.ypbind_binding_addr.s_addr = ypdb->dom_server_addr.sin_addr.s_addr; res.ypbind_respbody.ypbind_bindinfo.ypbind_binding_port = ypdb->dom_server_port; /*printf("domain %s at %s/%d\n", ypdb->dom_domain, inet_ntoa(ypdb->dom_server_addr.sin_addr), ntohs(ypdb->dom_server_addr.sin_port));*/ return &res; } bool_t * ypbindproc_setdom_2(transp, argp, clnt) SVCXPRT *transp; struct ypbind_setdom *argp; CLIENT *clnt; { struct sockaddr_in *fromsin, bindsin; static bool_t res; memset(&res, 0, sizeof(res)); fromsin = svc_getcaller(transp); switch (ypsetmode) { case YPSET_LOCAL: if (fromsin->sin_addr.s_addr != htonl(INADDR_LOOPBACK)) return (bool_t *)NULL; break; case YPSET_ALL: break; case YPSET_NO: default: return (bool_t *)NULL; } if (ntohs(fromsin->sin_port) >= IPPORT_RESERVED) return &res; if (argp->ypsetdom_vers != YPVERS) return &res; memset(&bindsin, 0, sizeof bindsin); bindsin.sin_family = AF_INET; bindsin.sin_len = sizeof(bindsin); bindsin.sin_addr = argp->ypsetdom_addr; bindsin.sin_port = argp->ypsetdom_port; rpc_received(argp->ypsetdom_domain, &bindsin, 1); res = 1; return &res; } static void ypbindprog_2(rqstp, transp) struct svc_req *rqstp; register SVCXPRT *transp; { union { char ypbindproc_domain_2_arg[MAXHOSTNAMELEN]; struct ypbind_setdom ypbindproc_setdom_2_arg; } argument; struct authunix_parms *creds; char *result; bool_t (*xdr_argument)(), (*xdr_result)(); char *(*local)(); switch (rqstp->rq_proc) { case YPBINDPROC_NULL: xdr_argument = xdr_void; xdr_result = xdr_void; local = (char *(*)()) ypbindproc_null_2; break; case YPBINDPROC_DOMAIN: xdr_argument = xdr_domainname; xdr_result = xdr_ypbind_resp; local = (char *(*)()) ypbindproc_domain_2; break; case YPBINDPROC_SETDOM: switch (rqstp->rq_cred.oa_flavor) { case AUTH_UNIX: creds = (struct authunix_parms *)rqstp->rq_clntcred; if (creds->aup_uid != 0) { svcerr_auth(transp, AUTH_BADCRED); return; } break; default: svcerr_auth(transp, AUTH_TOOWEAK); return; } xdr_argument = xdr_ypbind_setdom; xdr_result = xdr_void; local = (char *(*)()) ypbindproc_setdom_2; break; default: svcerr_noproc(transp); return; } memset(&argument, 0, sizeof(argument)); if (!svc_getargs(transp, xdr_argument, (caddr_t)&argument)) { svcerr_decode(transp); return; } result = (*local)(transp, &argument, rqstp); if (result != NULL && !svc_sendreply(transp, xdr_result, result)) { svcerr_systemerr(transp); } return; } main(argc, argv) int argc; char *argv[]; { char path[MAXPATHLEN]; struct timeval tv; fd_set fdsr; int width, lockfd; int evil = 0, one; yp_get_default_domain(&domainname); if (domainname[0] == '\0') { fprintf(stderr, "domainname not set. Aborting.\n"); exit(1); } while (--argc) { ++argv; if (!strcmp("-ypset", *argv)) ypsetmode = YPSET_ALL; else if (!strcmp("-ypsetme", *argv)) ypsetmode = YPSET_LOCAL; } /* blow away everything in BINDINGDIR */ #ifdef O_SHLOCK if ((lockfd = open(YPBINDLOCK, O_CREAT|O_SHLOCK|O_RDWR|O_TRUNC, 0644)) == -1) { fprintf(stderr, "ypbind: cannot create %s\n", YPBINDLOCK); exit(1); } #else if ((lockfd = open(YPBINDLOCK, O_CREAT|O_RDWR|O_TRUNC, 0644)) == -1) { fprintf(stderr, "ypbind: cannot create %s\n", YPBINDLOCK); exit(1); } flock(lockfd, LOCK_SH); #endif (void)pmap_unset(YPBINDPROG, YPBINDVERS); udptransp = svcudp_create(RPC_ANYSOCK); if (udptransp == NULL) { fprintf(stderr, "cannot create udp service."); exit(1); } if (!svc_register(udptransp, YPBINDPROG, YPBINDVERS, ypbindprog_2, IPPROTO_UDP)) { fprintf(stderr, "unable to register (YPBINDPROG, YPBINDVERS, udp)."); exit(1); } tcptransp = svctcp_create(RPC_ANYSOCK, 0, 0); if (tcptransp == NULL) { fprintf(stderr, "cannot create tcp service."); exit(1); } if (!svc_register(tcptransp, YPBINDPROG, YPBINDVERS, ypbindprog_2, IPPROTO_TCP)) { fprintf(stderr, "unable to register (YPBINDPROG, YPBINDVERS, tcp)."); exit(1); } if ((rpcsock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) { perror("socket"); return -1; } if ((pingsock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) { perror("socket"); return -1; } fcntl(rpcsock, F_SETFL, fcntl(rpcsock, F_GETFL, 0) | FNDELAY); fcntl(pingsock, F_SETFL, fcntl(rpcsock, F_GETFL, 0) | FNDELAY); one = 1; setsockopt(rpcsock, SOL_SOCKET, SO_BROADCAST, &one, sizeof(one)); rmtca.prog = YPPROG; rmtca.vers = YPVERS; rmtca.proc = YPPROC_DOMAIN_NONACK; rmtca.xdr_args = NULL; /* set at call time */ rmtca.args_ptr = NULL; /* set at call time */ rmtcr.port_ptr = &rmtcr_port; rmtcr.xdr_results = xdr_bool; rmtcr.results_ptr = (caddr_t)&rmtcr_outval; /* build initial domain binding, make it "unsuccessful" */ ypbindlist = (struct _dom_binding *)malloc(sizeof *ypbindlist); memset(ypbindlist, 0, sizeof *ypbindlist); strncpy(ypbindlist->dom_domain, domainname, sizeof ypbindlist->dom_domain); ypbindlist->dom_vers = YPVERS; ypbindlist->dom_alive = 0; ypbindlist->dom_lockfd = -1; sprintf(path, "%s/%s.%d", BINDINGDIR, ypbindlist->dom_domain, ypbindlist->dom_vers); (void)unlink(path); checkwork(); while (1) { width = svc_maxfd; if (rpcsock > width) width = rpcsock; if (pingsock > width) width = pingsock; width++; fdsr = svc_fdset; FD_SET(rpcsock, &fdsr); FD_SET(pingsock, &fdsr); tv.tv_sec = 1; tv.tv_usec = 0; switch (select(width, &fdsr, NULL, NULL, &tv)) { case 0: checkwork(); break; case -1: perror("select\n"); break; default: if (FD_ISSET(rpcsock, &fdsr)) handle_replies(); if (FD_ISSET(pingsock, &fdsr)) handle_ping(); svc_getreqset(&fdsr); if (check) checkwork(); break; } if (!evil && ypbindlist->dom_alive) { evil = 1; daemon(0, 0); } } } /* * State transition is done like this: * * STATE EVENT ACTION NEWSTATE TIMEOUT * no binding timeout broadcast no binding 5 sec * no binding answer -- binding 60 sec * binding timeout ping server checking 5 sec * checking timeout ping server + broadcast checking 5 sec * checking answer -- binding 60 sec */ checkwork() { struct _dom_binding *ypdb; time_t t; check = 0; time(&t); for (ypdb = ypbindlist; ypdb; ypdb = ypdb->dom_pnext) { if (ypdb->dom_check_t < t) { if (ypdb->dom_alive == 1) ping(ypdb); else broadcast(ypdb); time(&t); ypdb->dom_check_t = t + 5; } } } ping(ypdb) struct _dom_binding *ypdb; { char *dom = ypdb->dom_domain; struct rpc_msg msg; char buf[1400]; enum clnt_stat st; int outlen; AUTH *rpcua; XDR xdr; memset(&xdr, 0, sizeof xdr); memset(&msg, 0, sizeof msg); rpcua = authunix_create_default(); if (rpcua == (AUTH *)NULL) { /*printf("cannot get unix auth\n");*/ return RPC_SYSTEMERROR; } msg.rm_direction = CALL; msg.rm_call.cb_rpcvers = RPC_MSG_VERSION; msg.rm_call.cb_prog = YPPROG; msg.rm_call.cb_vers = YPVERS; msg.rm_call.cb_proc = YPPROC_DOMAIN_NONACK; msg.rm_call.cb_cred = rpcua->ah_cred; msg.rm_call.cb_verf = rpcua->ah_verf; msg.rm_xid = ypdb->dom_xid = ypdb2xid(ypdb); xdrmem_create(&xdr, buf, sizeof buf, XDR_ENCODE); if (!xdr_callmsg(&xdr, &msg)) { st = RPC_CANTENCODEARGS; AUTH_DESTROY(rpcua); return st; } if (!xdr_domainname(&xdr, dom)) { st = RPC_CANTENCODEARGS; AUTH_DESTROY(rpcua); return st; } outlen = (int)xdr_getpos(&xdr); xdr_destroy(&xdr); if (outlen < 1) { st = RPC_CANTENCODEARGS; AUTH_DESTROY(rpcua); return st; } AUTH_DESTROY(rpcua); ypdb->dom_alive = 2; if (sendto(pingsock, buf, outlen, 0, (struct sockaddr *)&ypdb->dom_server_addr, sizeof ypdb->dom_server_addr) < 0) perror("sendto"); return 0; } int ypdb2xid(ypdb) struct _dom_binding *ypdb; { int xid; xid = (int)ypdb; /* XXX: & 0xffffffff; */ return (xid); } struct _dom_binding * xid2ypdb(xid) int xid; { struct _dom_binding *ypdb; for (ypdb = ypbindlist; ypdb; ypdb = ypdb->dom_pnext) if (ypdb->dom_xid == xid) break; return (ypdb); } broadcast(ypdb) struct _dom_binding *ypdb; { char *dom = ypdb->dom_domain; struct rpc_msg msg; char buf[1400], inbuf[8192]; char path[MAXPATHLEN]; enum clnt_stat st; int outlen, i, sock, len; struct sockaddr_in bindsin; struct ifconf ifc; struct ifreq ifreq, *ifr; struct in_addr in; AUTH *rpcua; XDR xdr; rmtca.xdr_args = xdr_domainname; rmtca.args_ptr = dom; memset(&xdr, 0, sizeof xdr); memset(&msg, 0, sizeof msg); rpcua = authunix_create_default(); if (rpcua == (AUTH *)NULL) { /*printf("cannot get unix auth\n");*/ return RPC_SYSTEMERROR; } msg.rm_direction = CALL; msg.rm_call.cb_rpcvers = RPC_MSG_VERSION; msg.rm_call.cb_prog = PMAPPROG; msg.rm_call.cb_vers = PMAPVERS; msg.rm_call.cb_proc = PMAPPROC_CALLIT; msg.rm_call.cb_cred = rpcua->ah_cred; msg.rm_call.cb_verf = rpcua->ah_verf; msg.rm_xid = ypdb->dom_xid = ypdb2xid(ypdb); xdrmem_create(&xdr, buf, sizeof buf, XDR_ENCODE); if (!xdr_callmsg(&xdr, &msg)) { st = RPC_CANTENCODEARGS; AUTH_DESTROY(rpcua); return st; } if (!xdr_rmtcall_args(&xdr, &rmtca)) { st = RPC_CANTENCODEARGS; AUTH_DESTROY(rpcua); return st; } outlen = (int)xdr_getpos(&xdr); xdr_destroy(&xdr); if (outlen < 1) { st = RPC_CANTENCODEARGS; AUTH_DESTROY(rpcua); return st; } AUTH_DESTROY(rpcua); if (ypdb->dom_lockfd != -1) { close(ypdb->dom_lockfd); ypdb->dom_lockfd = -1; sprintf(path, "%s/%s.%d", BINDINGDIR, ypdb->dom_domain, ypdb->dom_vers); unlink(path); } memset(&bindsin, 0, sizeof bindsin); bindsin.sin_family = AF_INET; bindsin.sin_len = sizeof(bindsin); bindsin.sin_port = htons(PMAPPORT); if (ypdb->dom_alive == 2) { /* * This resolves the following situation: * ypserver on other subnet was once bound, * but rebooted and is now using a different port */ bindsin.sin_addr = ypdb->dom_server_addr.sin_addr; if (sendto(rpcsock, buf, outlen, 0, (struct sockaddr *)&bindsin, sizeof bindsin) < 0) perror("sendto"); } /* find all networks and send the RPC packet out them all */ if ((sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) { perror("socket"); return -1; } ifc.ifc_len = sizeof inbuf; ifc.ifc_buf = inbuf; if (ioctl(sock, SIOCGIFCONF, &ifc) < 0) { close(sock); perror("ioctl(SIOCGIFCONF)"); return -1; } ifr = ifc.ifc_req; ifreq.ifr_name[0] = '\0'; for (i = 0; i < ifc.ifc_len; i += len, ifr = (struct ifreq *)((caddr_t)ifr + len)) { #if defined(BSD) && BSD >= 199103 len = sizeof ifr->ifr_name + ifr->ifr_addr.sa_len; #else len = sizeof ifc.ifc_len / sizeof(struct ifreq); #endif ifreq = *ifr; if (ifreq.ifr_addr.sa_family != AF_INET) continue; if (ioctl(sock, SIOCGIFFLAGS, &ifreq) < 0) { perror("ioctl(SIOCGIFFLAGS)"); continue; } if ((ifreq.ifr_flags & IFF_UP) == 0) continue; ifreq.ifr_flags &= (IFF_LOOPBACK | IFF_BROADCAST); if (ifreq.ifr_flags == IFF_BROADCAST) { if (ioctl(sock, SIOCGIFBRDADDR, &ifreq) < 0) { perror("ioctl(SIOCGIFBRDADDR)"); continue; } } else if (ifreq.ifr_flags == IFF_LOOPBACK) { if (ioctl(sock, SIOCGIFADDR, &ifreq) < 0) { perror("ioctl(SIOCGIFADDR)"); continue; } } else continue; in = ((struct sockaddr_in *)&ifreq.ifr_addr)->sin_addr; bindsin.sin_addr = in; if (sendto(rpcsock, buf, outlen, 0, (struct sockaddr *)&bindsin, sizeof bindsin) < 0) perror("sendto"); } close(sock); return 0; } /*enum clnt_stat*/ handle_replies() { char buf[1400]; int fromlen, inlen; struct _dom_binding *ypdb; struct sockaddr_in raddr; struct rpc_msg msg; XDR xdr; recv_again: memset(&xdr, 0, sizeof(xdr)); memset(&msg, 0, sizeof(msg)); msg.acpted_rply.ar_verf = _null_auth; msg.acpted_rply.ar_results.where = (caddr_t)&rmtcr; msg.acpted_rply.ar_results.proc = xdr_rmtcallres; try_again: fromlen = sizeof (struct sockaddr); inlen = recvfrom(rpcsock, buf, sizeof buf, 0, (struct sockaddr *)&raddr, &fromlen); if (inlen < 0) { if (errno == EINTR) goto try_again; return RPC_CANTRECV; } if (inlen < sizeof(u_int32_t)) goto recv_again; /* * see if reply transaction id matches sent id. * If so, decode the results. */ xdrmem_create(&xdr, buf, (u_int)inlen, XDR_DECODE); if (xdr_replymsg(&xdr, &msg)) { if ((msg.rm_reply.rp_stat == MSG_ACCEPTED) && (msg.acpted_rply.ar_stat == SUCCESS)) { raddr.sin_port = htons((u_short)rmtcr_port); ypdb = xid2ypdb(msg.rm_xid); if (ypdb) rpc_received(ypdb->dom_domain, &raddr, 0); } } xdr.x_op = XDR_FREE; msg.acpted_rply.ar_results.proc = xdr_void; xdr_destroy(&xdr); return RPC_SUCCESS; } /*enum clnt_stat*/ handle_ping() { char buf[1400]; int fromlen, inlen; struct _dom_binding *ypdb; struct sockaddr_in raddr; struct rpc_msg msg; XDR xdr; bool_t res; recv_again: memset(&xdr, 0, sizeof(xdr)); memset(&msg, 0, sizeof(msg)); msg.acpted_rply.ar_verf = _null_auth; msg.acpted_rply.ar_results.where = (caddr_t)&res; msg.acpted_rply.ar_results.proc = xdr_bool; try_again: fromlen = sizeof (struct sockaddr); inlen = recvfrom(pingsock, buf, sizeof buf, 0, (struct sockaddr *)&raddr, &fromlen); if (inlen < 0) { if (errno == EINTR) goto try_again; return RPC_CANTRECV; } if (inlen < sizeof(u_int32_t)) goto recv_again; /* * see if reply transaction id matches sent id. * If so, decode the results. */ xdrmem_create(&xdr, buf, (u_int)inlen, XDR_DECODE); if (xdr_replymsg(&xdr, &msg)) { if ((msg.rm_reply.rp_stat == MSG_ACCEPTED) && (msg.acpted_rply.ar_stat == SUCCESS)) { ypdb = xid2ypdb(msg.rm_xid); if (ypdb) rpc_received(ypdb->dom_domain, &raddr, 0); } } xdr.x_op = XDR_FREE; msg.acpted_rply.ar_results.proc = xdr_void; xdr_destroy(&xdr); return RPC_SUCCESS; } /* * LOOPBACK IS MORE IMPORTANT: PUT IN HACK */ rpc_received(dom, raddrp, force) char *dom; struct sockaddr_in *raddrp; int force; { struct _dom_binding *ypdb; struct iovec iov[2]; struct ypbind_resp ybr; char path[MAXPATHLEN]; int fd; /*printf("returned from %s about %s\n", inet_ntoa(raddrp->sin_addr), dom);*/ if (dom == NULL) return; for (ypdb = ypbindlist; ypdb; ypdb = ypdb->dom_pnext) if (!strcmp(ypdb->dom_domain, dom)) break; if (ypdb == NULL) { if (force == 0) return; ypdb = (struct _dom_binding *)malloc(sizeof *ypdb); memset(ypdb, 0, sizeof *ypdb); strncpy(ypdb->dom_domain, dom, sizeof ypdb->dom_domain); ypdb->dom_lockfd = -1; ypdb->dom_pnext = ypbindlist; ypbindlist = ypdb; } /* soft update, alive */ if (ypdb->dom_alive == 1 && force == 0) { if (!memcmp(&ypdb->dom_server_addr, raddrp, sizeof ypdb->dom_server_addr)) { ypdb->dom_alive = 1; ypdb->dom_check_t = time(NULL) + 60; /* recheck binding in 60 sec */ } return; } memcpy(&ypdb->dom_server_addr, raddrp, sizeof ypdb->dom_server_addr); ypdb->dom_check_t = time(NULL) + 60; /* recheck binding in 60 seconds */ ypdb->dom_vers = YPVERS; ypdb->dom_alive = 1; if (ypdb->dom_lockfd != -1) close(ypdb->dom_lockfd); sprintf(path, "%s/%s.%d", BINDINGDIR, ypdb->dom_domain, ypdb->dom_vers); #ifdef O_SHLOCK if ((fd = open(path, O_CREAT|O_SHLOCK|O_RDWR|O_TRUNC, 0644)) == -1) { (void)mkdir(BINDINGDIR, 0755); if ((fd = open(path, O_CREAT|O_SHLOCK|O_RDWR|O_TRUNC, 0644)) == -1) return; } #else if ((fd = open(path, O_CREAT|O_RDWR|O_TRUNC, 0644)) == -1) { (void)mkdir(BINDINGDIR, 0755); if ((fd = open(path, O_CREAT|O_RDWR|O_TRUNC, 0644)) == -1) return; } flock(fd, LOCK_SH); #endif /* * ok, if BINDINGDIR exists, and we can create the binding file, * then write to it.. */ ypdb->dom_lockfd = fd; iov[0].iov_base = (caddr_t)&(udptransp->xp_port); iov[0].iov_len = sizeof udptransp->xp_port; iov[1].iov_base = (caddr_t)&ybr; iov[1].iov_len = sizeof ybr; memset(&ybr, 0, sizeof ybr); ybr.ypbind_status = YPBIND_SUCC_VAL; ybr.ypbind_respbody.ypbind_bindinfo.ypbind_binding_addr = raddrp->sin_addr; ybr.ypbind_respbody.ypbind_bindinfo.ypbind_binding_port = raddrp->sin_port; if (writev(ypdb->dom_lockfd, iov, 2) != iov[0].iov_len + iov[1].iov_len) { perror("write"); close(ypdb->dom_lockfd); unlink(path); ypdb->dom_lockfd = -1; return; } }