/* $NetBSD: lockd.c,v 1.12.34.1 2019/08/16 19:25:31 martin Exp $ */ /* * Copyright (c) 1995 * A.R. Gordon (andrew.gordon@net-tel.co.uk). 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 for the FreeBSD project * 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 ANDREW GORDON 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 THE AUTHOR 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. * */ #include #ifndef lint __RCSID("$NetBSD: lockd.c,v 1.12.34.1 2019/08/16 19:25:31 martin Exp $"); #endif /* * main() function for NFS lock daemon. Most of the code in this * file was generated by running rpcgen /usr/include/rpcsvc/nlm_prot.x. * * The actual program logic is in the file lock_proc.c */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "lockd.h" #include int debug_level = 0; /* 0 = no debugging syslog() calls */ extern int _rpcsvcdirty; int grace_expired; void nlm_prog_0(struct svc_req *, SVCXPRT *); void nlm_prog_1(struct svc_req *, SVCXPRT *); void nlm_prog_3(struct svc_req *, SVCXPRT *); void nlm_prog_4(struct svc_req *, SVCXPRT *); static void usage(void) __dead; static void sigalarm_handler(int); static const char *transports[] = { "udp", "tcp", "udp6", "tcp6" }; int main(int argc, char **argv) { SVCXPRT *transp; int ch, i, minindex, maxindex, s; bool use_ipv4, use_ipv6; struct sigaction sigchild, sigalarm; int grace_period = 30; struct netconfig *nconf; int maxrec = RPC_MAXDATASIZE; (void)setprogname(*argv); use_ipv4 = use_ipv6 = false; while ((ch = getopt(argc, argv, "d:g:46")) != (-1)) { switch (ch) { case 'd': debug_level = atoi(optarg); if (!debug_level) { usage(); /* NOTREACHED */ } break; case 'g': grace_period = atoi(optarg); if (!grace_period) { usage(); /* NOTREACHED */ } break; case '4': use_ipv4 = true; break; case '6': use_ipv6 = true; break; default: case '?': usage(); /* NOTREACHED */ } } (void)rpcb_unset(NLM_PROG, NLM_SM, NULL); (void)rpcb_unset(NLM_PROG, NLM_VERS, NULL); (void)rpcb_unset(NLM_PROG, NLM_VERSX, NULL); (void)rpcb_unset(NLM_PROG, NLM_VERS4, NULL); if (!use_ipv4 && !use_ipv6) { s = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP); if (s < 0) use_ipv4 = true; else { (void)close(s); use_ipv4 = use_ipv6 = true; } } if (use_ipv4) minindex = 0; else minindex = 2; if (use_ipv6) maxindex = 4; else maxindex = 2; (void)rpc_control(RPC_SVC_CONNMAXREC_SET, &maxrec); for (i = minindex; i < maxindex; i++) { nconf = getnetconfigent(transports[i]); if (nconf == NULL) errx(1, "cannot get %s netconf.", transports[i]); transp = svc_tli_create(RPC_ANYFD, nconf, NULL, RPC_MAXDATASIZE, RPC_MAXDATASIZE); if (transp == NULL) { errx(1, "cannot create %s service.", transports[i]); /* NOTREACHED */ } if (!svc_reg(transp, NLM_PROG, NLM_SM, nlm_prog_0, nconf)) { errx(1, "unable to register (NLM_PROG, NLM_SM, %s)", transports[i]); /* NOTREACHED */ } if (!svc_reg(transp, NLM_PROG, NLM_VERS, nlm_prog_1, nconf)) { errx(1, "unable to register (NLM_PROG, NLM_VERS, %s)", transports[i]); /* NOTREACHED */ } if (!svc_reg(transp, NLM_PROG, NLM_VERSX, nlm_prog_3, nconf)) { errx(1, "unable to register (NLM_PROG, NLM_VERSX, %s)", transports[i]); /* NOTREACHED */ } if (!svc_reg(transp, NLM_PROG, NLM_VERS4, nlm_prog_4, nconf)) { errx(1, "unable to register (NLM_PROG, NLM_VERS4, %s)", transports[i]); /* NOTREACHED */ } freenetconfigent(nconf); } /* * Note that it is NOT sensible to run this program from inetd - the * protocol assumes that it will run immediately at boot time. */ if (daemon(0, 0) == -1) { err(1, "cannot fork"); /* NOTREACHED */ } (void)pidfile(NULL); openlog("rpc.lockd", 0, LOG_DAEMON); if (debug_level) syslog(LOG_INFO, "Starting, debug level %d", debug_level); else syslog(LOG_INFO, "Starting"); sigchild.sa_handler = sigchild_handler; (void)sigemptyset(&sigchild.sa_mask); sigchild.sa_flags = SA_RESTART; if (sigaction(SIGCHLD, &sigchild, NULL) != 0) { syslog(LOG_WARNING, "sigaction(SIGCHLD) failed (%m)"); exit(1); } sigalarm.sa_handler = sigalarm_handler; (void)sigemptyset(&sigalarm.sa_mask); sigalarm.sa_flags = SA_RESETHAND; /* should only happen once */ sigalarm.sa_flags |= SA_RESTART; if (sigaction(SIGALRM, &sigalarm, NULL) != 0) { syslog(LOG_WARNING, "sigaction(SIGALRM) failed (%m)"); exit(1); } grace_expired = 0; if (alarm(10) == (unsigned int)-1) { syslog(LOG_WARNING, "alarm failed (%m)"); exit(1); } svc_run(); /* Should never return */ return 1; } static void /*ARGSUSED*/ sigalarm_handler(int s) { grace_expired = 1; } static void usage(void) { (void)fprintf(stderr, "Usage: %s [-46] [-d debug_level] [-g grace_period]\n", getprogname()); exit(1); }