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-rw-r--r--usr.sbin/rpc.statd/statd.c232
1 files changed, 232 insertions, 0 deletions
diff --git a/usr.sbin/rpc.statd/statd.c b/usr.sbin/rpc.statd/statd.c
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+/*
+ * 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.
+ *
+ */
+
+
+/* main() function for status monitor daemon. Some of the code in this */
+/* file was generated by running rpcgen /usr/include/rpcsvc/sm_inter.x */
+/* The actual program logic is in the file procs.c */
+
+#include <stdio.h>
+#include <rpc/rpc.h>
+#include <syslog.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <signal.h>
+#include "statd.h"
+
+#ifndef lint
+static char rcsid[] = "$id: $";
+#endif /* not lint */
+
+int debug = 0; /* Controls syslog() calls for debug messages */
+
+static void sm_prog_1();
+static void handle_sigchld();
+
+main(int argc, char **argv)
+{
+ SVCXPRT *transp;
+ struct sigaction sa;
+
+ if (argc > 1)
+ {
+ if (strcmp(argv[1], "-d"))
+ {
+ fprintf(stderr, "Usage: rpc.statd [-d]\n");
+ exit(1);
+ }
+ debug = 1;
+ }
+
+ (void)pmap_unset(SM_PROG, SM_VERS);
+
+ transp = svcudp_create(RPC_ANYSOCK);
+ if (transp == NULL)
+ {
+ fprintf(stderr, "cannot create udp service.\n");
+ exit(1);
+ }
+ if (!svc_register(transp, SM_PROG, SM_VERS, sm_prog_1, IPPROTO_UDP))
+ {
+ fprintf(stderr, "unable to register (SM_PROG, SM_VERS, udp).\n");
+ exit(1);
+ }
+
+ transp = svctcp_create(RPC_ANYSOCK, 0, 0);
+ if (transp == NULL)
+ {
+ fprintf(stderr, "cannot create tcp service.\n");
+ exit(1);
+ }
+ if (!svc_register(transp, SM_PROG, SM_VERS, sm_prog_1, IPPROTO_TCP)) {
+ fprintf(stderr, "unable to register (SM_PROG, SM_VERS, tcp).\n");
+ exit(1);
+ }
+ init_file("/var/db/statd.status");
+
+ /* Note that it is NOT sensible to run this program from inetd - the */
+ /* protocol assumes that it will run immediately at boot time. */
+ daemon(0, 0);
+ openlog("rpc.statd", 0, LOG_DAEMON);
+ if (debug) syslog(LOG_INFO, "Starting - debug enabled");
+ else syslog(LOG_INFO, "Starting");
+
+ /* Install signal handler to collect exit status of child processes */
+ sa.sa_handler = handle_sigchld;
+ sigemptyset(&sa.sa_mask);
+ sigaddset(&sa.sa_mask, SIGCHLD);
+ sa.sa_flags = SA_RESTART;
+ sigaction(SIGCHLD, &sa, NULL);
+
+ /* Initialisation now complete - start operating */
+ notify_hosts(); /* Forks a process (if necessary) to do the */
+ /* SM_NOTIFY calls, which may be slow. */
+
+ svc_run(); /* Should never return */
+ exit(1);
+}
+
+
+/* handle_sigchld ---------------------------------------------------------- */
+/*
+ Purpose: Catch SIGCHLD and collect process status
+ Retruns: Nothing.
+ Notes: No special action required, other than to collect the
+ process status and hence allow the child to die:
+ we only use child processes for asynchronous transmission
+ of SM_NOTIFY to other systems, so it is normal for the
+ children to exit when they have done their work.
+*/
+
+static void handle_sigchld(int sig, int code, struct sigcontext *scp)
+{
+ int pid, status;
+ pid = wait4(-1, &status, WNOHANG, (struct rusage*)0);
+ if (!pid) syslog(LOG_ERR, "Phantom SIGCHLD??");
+ else if (status == 0)
+ {
+ if (debug) syslog(LOG_DEBUG, "Child %d exited OK", pid);
+ }
+ else syslog(LOG_ERR, "Child %d failed with status %d", pid,
+ WEXITSTATUS(status));
+}
+
+
+/* sm_prog1 ---------------------------------------------------------------- */
+/*
+ Purpose: Handle one RPC request
+ Returns: Nothing
+ Notes: Called from RPC libraray on receipt of a request.
+ Code for this function was auto-generated by rpcgen.
+*/
+
+static void
+sm_prog_1(struct svc_req *rqstp, SVCXPRT *transp)
+{
+ union
+ {
+ struct sm_name sm_stat_1_arg;
+ struct mon sm_mon_1_arg;
+ struct mon_id sm_unmon_1_arg;
+ struct my_id sm_unmon_all_1_arg;
+ struct stat_chge sm_notify_1_arg;
+ } argument;
+ char *result;
+ bool_t (*xdr_argument)(), (*xdr_result)();
+ char *(*local)();
+
+ switch (rqstp->rq_proc)
+ {
+ case NULLPROC:
+ (void)svc_sendreply(transp, xdr_void, (char *)NULL);
+ return;
+
+ case SM_STAT:
+ xdr_argument = xdr_sm_name;
+ xdr_result = xdr_sm_stat_res;
+ local = (char *(*)()) sm_stat_1;
+ break;
+
+ case SM_MON:
+ xdr_argument = xdr_mon;
+ xdr_result = xdr_sm_stat_res;
+ local = (char *(*)()) sm_mon_1;
+ break;
+
+ case SM_UNMON:
+ xdr_argument = xdr_mon_id;
+ xdr_result = xdr_sm_stat;
+ local = (char *(*)()) sm_unmon_1;
+ break;
+
+ case SM_UNMON_ALL:
+ xdr_argument = xdr_my_id;
+ xdr_result = xdr_sm_stat;
+ local = (char *(*)()) sm_unmon_all_1;
+ break;
+
+ case SM_SIMU_CRASH:
+ xdr_argument = xdr_void;
+ xdr_result = xdr_void;
+ local = (char *(*)()) sm_simu_crash_1;
+ break;
+
+ case SM_NOTIFY:
+ xdr_argument = xdr_stat_chge;
+ xdr_result = xdr_void;
+ local = (char *(*)()) sm_notify_1;
+ break;
+
+ default:
+ svcerr_noproc(transp);
+ return;
+ }
+
+ bzero((char *)&argument, sizeof(argument));
+ if (!svc_getargs(transp, xdr_argument, (caddr_t)&argument))
+ {
+ svcerr_decode(transp);
+ return;
+ }
+ result = (*local)(&argument, rqstp);
+ if (result != NULL && !svc_sendreply(transp, xdr_result, result))
+ {
+ svcerr_systemerr(transp);
+ }
+ if (!svc_freeargs(transp, xdr_argument, (caddr_t)&argument))
+ {
+ syslog(LOG_ERR, "unable to free arguments");
+ exit(1);
+ }
+}
+
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