3 * A.R. Gordon (andrew.gordon@net-tel.co.uk). All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed for the FreeBSD project
16 * 4. Neither the name of the author nor the names of any co-contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY ANDREW GORDON AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 /* main() function for status monitor daemon. Some of the code in this */
35 /* file was generated by running rpcgen /usr/include/rpcsvc/sm_inter.x */
36 /* The actual program logic is in the file procs.c */
38 #include <sys/cdefs.h>
39 __FBSDID("$FreeBSD$");
45 #include <rpc/rpc_com.h>
48 #include <sys/types.h>
54 int debug = 0; /* Controls syslog() calls for debug messages */
56 extern void sm_prog_1(struct svc_req *rqstp, SVCXPRT *transp);
57 static void handle_sigchld(int sig);
58 static void usage(void);
61 main(int argc, char **argv)
65 int maxrec = RPC_MAXDATASIZE;
67 while ((ch = getopt(argc, argv, "d")) != -1)
78 (void)rpcb_unset(SM_PROG, SM_VERS, NULL);
80 rpc_control(RPC_SVC_CONNMAXREC_SET, &maxrec);
82 if (!svc_create(sm_prog_1, SM_PROG, SM_VERS, "udp"))
83 errx(1, "cannot create udp service");
84 if (!svc_create(sm_prog_1, SM_PROG, SM_VERS, "tcp"))
85 errx(1, "cannot create tcp service");
86 init_file("/var/db/statd.status");
88 /* Note that it is NOT sensible to run this program from inetd - the */
89 /* protocol assumes that it will run immediately at boot time. */
91 openlog("rpc.statd", 0, LOG_DAEMON);
92 if (debug) syslog(LOG_INFO, "Starting - debug enabled");
93 else syslog(LOG_INFO, "Starting");
95 /* Install signal handler to collect exit status of child processes */
96 sa.sa_handler = handle_sigchld;
97 sigemptyset(&sa.sa_mask);
98 sigaddset(&sa.sa_mask, SIGCHLD);
99 sa.sa_flags = SA_RESTART;
100 sigaction(SIGCHLD, &sa, NULL);
102 /* Initialisation now complete - start operating */
103 notify_hosts(); /* Forks a process (if necessary) to do the */
104 /* SM_NOTIFY calls, which may be slow. */
106 svc_run(); /* Should never return */
113 fprintf(stderr, "usage: rpc.statd [-d]\n");
117 /* handle_sigchld ---------------------------------------------------------- */
119 Purpose: Catch SIGCHLD and collect process status
121 Notes: No special action required, other than to collect the
122 process status and hence allow the child to die:
123 we only use child processes for asynchronous transmission
124 of SM_NOTIFY to other systems, so it is normal for the
125 children to exit when they have done their work.
128 static void handle_sigchld(int sig __unused)
131 pid = wait4(-1, &status, WNOHANG, (struct rusage*)0);
132 if (!pid) syslog(LOG_ERR, "Phantom SIGCHLD??");
133 else if (status == 0)
135 if (debug) syslog(LOG_DEBUG, "Child %d exited OK", pid);
137 else syslog(LOG_ERR, "Child %d failed with status %d", pid,
138 WEXITSTATUS(status));