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33 * The top level of the daemon, the format is heavily borrowed
34 * from rwhod.c. Basically: find out who and where you are;
35 * disconnect all descriptors and ttys, and then endless
36 * loop on waiting for and processing requests
38 #include <sys/types.h>
39 #include <sys/socket.h>
40 #include <sys/param.h>
41 #include <netinet/in.h>
42 #include <protocols/talkd.h>
56 static CTL_MSG request;
57 static CTL_RESPONSE response;
60 static long lastmsgtime;
62 char hostname[MAXHOSTNAMELEN];
68 main(int argc, char *argv[])
70 register CTL_MSG *mp = &request;
72 struct sockaddr ctl_addr;
76 * removed so ntalkd can run in tty sandbox
79 errx(1, "getuid: not super-user");
81 openlog("talkd", LOG_PID, LOG_DAEMON);
82 if (gethostname(hostname, sizeof(hostname) - 1) < 0) {
83 syslog(LOG_ERR, "gethostname: %m");
86 hostname[sizeof(hostname) - 1] = '\0';
87 if (chdir(_PATH_DEV) < 0) {
88 syslog(LOG_ERR, "chdir: %s: %m", _PATH_DEV);
91 if (argc > 1 && strcmp(argv[1], "-d") == 0)
93 signal(SIGALRM, timeout);
96 cc = recv(0, (char *)mp, sizeof(*mp), 0);
97 if (cc != sizeof (*mp)) {
98 if (cc < 0 && errno != EINTR)
99 syslog(LOG_WARNING, "recv: %m");
102 lastmsgtime = time(0);
103 (void)memcpy(&ctl_addr.sa_data, &mp->ctl_addr.sa_data,
104 sizeof(ctl_addr.sa_data));
105 ctl_addr.sa_family = ntohs(mp->ctl_addr.sa_family);
106 ctl_addr.sa_len = sizeof(ctl_addr);
107 process_request(mp, &response);
108 /* can block here, is this what I want? */
109 cc = sendto(STDIN_FILENO, (char *)&response,
110 sizeof(response), 0, &ctl_addr, sizeof(ctl_addr));
111 if (cc != sizeof (response))
112 syslog(LOG_WARNING, "sendto: %m");
117 timeout(int sig __unused)
119 int save_errno = errno;
121 if (time(0) - lastmsgtime >= MAXIDLE)