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
32 * $FreeBSD: src/usr.sbin/rpc.statd/statd.c,v 1.6 1999/10/05 14:40:38 marcel Exp $
35 /* main() function for status monitor daemon. Some of the code in this */
36 /* file was generated by running rpcgen /usr/include/rpcsvc/sm_inter.x */
37 /* The actual program logic is in the file procs.c */
45 #include <sys/types.h>
50 int debug = 0; /* Controls syslog() calls for debug messages */
52 static void handle_sigchld(int);
53 static void usage(void);
56 main(int argc, char **argv)
59 int maxrec = RPC_MAXDATASIZE;
63 if (strcmp(argv[1], "-d"))
68 rpcb_unset(SM_PROG, SM_VERS, NULL);
70 rpc_control(RPC_SVC_CONNMAXREC_SET, &maxrec);
72 if (!svc_create(sm_prog_1, SM_PROG, SM_VERS, "udp"))
73 errx(1, "cannot create udp service");
74 if (!svc_create(sm_prog_1, SM_PROG, SM_VERS, "tcp"))
75 errx(1, "cannot create tcp service");
76 init_file("/var/db/statd.status");
78 /* Note that it is NOT sensible to run this program from inetd - the */
79 /* protocol assumes that it will run immediately at boot time. */
81 openlog("rpc.statd", 0, LOG_DAEMON);
82 if (debug) syslog(LOG_INFO, "Starting - debug enabled");
83 else syslog(LOG_INFO, "Starting");
85 /* Install signal handler to collect exit status of child processes */
86 sa.sa_handler = handle_sigchld;
87 sigemptyset(&sa.sa_mask);
88 sigaddset(&sa.sa_mask, SIGCHLD);
89 sa.sa_flags = SA_RESTART;
90 sigaction(SIGCHLD, &sa, NULL);
92 /* Initialisation now complete - start operating */
93 notify_hosts(); /* Forks a process (if necessary) to do the */
94 /* SM_NOTIFY calls, which may be slow. */
96 svc_run(); /* Should never return */
103 fprintf(stderr, "usage: rpc.statd [-d]\n");
107 /* handle_sigchld ---------------------------------------------------------- */
109 Purpose: Catch SIGCHLD and collect process status
111 Notes: No special action required, other than to collect the
112 process status and hence allow the child to die:
113 we only use child processes for asynchronous transmission
114 of SM_NOTIFY to other systems, so it is normal for the
115 children to exit when they have done their work.
119 handle_sigchld(__unused int sig)
122 pid = wait4(-1, &status, WNOHANG, NULL);
123 if (!pid) syslog(LOG_ERR, "Phantom SIGCHLD??");
124 else if (status == 0)
126 if (debug) syslog(LOG_DEBUG, "Child %d exited OK", pid);
128 else syslog(LOG_ERR, "Child %d failed with status %d", pid,
129 WEXITSTATUS(status));