2 * Copyright (c) 1990,1993 Regents of The University of Michigan.
3 * All Rights Reserved. See COPYRIGHT.
8 #endif /* HAVE_CONFIG_H */
14 #include <sys/param.h>
17 #include <sys/socket.h>
21 #include <sys/resource.h>
23 #include <atalk/logger.h>
24 #include <atalk/adouble.h>
25 #include <atalk/compat.h>
26 #include <atalk/dsi.h>
27 #include <atalk/afp.h>
28 #include <atalk/paths.h>
29 #include <atalk/util.h>
30 #include <atalk/server_child.h>
31 #include <atalk/server_ipc.h>
32 #include <atalk/errchk.h>
33 #include <atalk/globals.h>
34 #include <atalk/netatalk_conf.h>
36 #include <event2/event.h>
38 /* how many seconds we wait to shutdown from SIGTERM before we send SIGKILL */
39 #define KILL_GRACETIME 5
41 /* forward declaration */
42 static pid_t run_process(const char *path, ...);
43 static void kill_childs(int sig, ...);
45 /* static variables */
47 static sig_atomic_t got_chldsig;
48 static pid_t afpd_pid = -1, cnid_metad_pid = -1;
49 static uint afpd_restarts, cnid_metad_restarts;
50 static struct event_base *base;
51 struct event *sigterm_ev, *sigquit_ev, *sigchld_ev;
52 static int in_shutdown;
54 /******************************************************************
55 * libevent helper functions
56 ******************************************************************/
58 /* libevent logging callback */
59 static void libevent_logmsg_cb(int severity, const char *msg)
62 case _EVENT_LOG_DEBUG:
63 LOG(log_debug, logtype_default, "libevent: %s", msg);
66 LOG(log_info, logtype_default, "libevent: %s", msg);
69 LOG(log_warning, logtype_default, "libevent: %s", msg);
72 LOG(log_error, logtype_default, "libevent: %s", msg);
75 LOG(log_error, logtype_default, "libevent: %s", msg);
76 break; /* never reached */
80 /******************************************************************
81 * libevent event callbacks
82 ******************************************************************/
84 /* SIGTERM callback */
85 static void sigterm_cb(evutil_socket_t fd, short what, void *arg)
87 LOG(log_note, logtype_afpd, "Exiting on SIGTERM");
89 event_base_loopbreak(base);
92 /* SIGQUIT callback */
93 static void sigquit_cb(evutil_socket_t fd, short what, void *arg)
95 LOG(log_note, logtype_afpd, "Exiting on SIGQUIT");
96 kill_childs(SIGQUIT, &afpd_pid, &cnid_metad_pid, NULL);
99 /* SIGCHLD callback */
100 static void sigchld_cb(evutil_socket_t fd, short what, void *arg)
105 LOG(log_debug, logtype_afpd, "Got SIGCHLD event");
107 while ((pid = waitpid(-1, &status, WNOHANG)) > 0) {
108 if (WIFEXITED(status)) {
109 if (WEXITSTATUS(status))
110 LOG(log_info, logtype_afpd, "child[%d]: exited %d", pid, WEXITSTATUS(status));
112 LOG(log_info, logtype_afpd, "child[%d]: done", pid);
114 if (WIFSIGNALED(status))
115 LOG(log_info, logtype_afpd, "child[%d]: killed by signal %d", pid, WTERMSIG(status));
117 LOG(log_info, logtype_afpd, "child[%d]: died", pid);
120 if (pid == afpd_pid) {
126 LOG(log_note, logtype_afpd, "Restarting 'afpd' (restarts: %u)", afpd_restarts);
127 if ((afpd_pid = run_process(_PATH_AFPD, "-d", "-F", obj.options.configfile, NULL)) == -1) {
128 LOG(log_error, logtype_afpd, "Error starting 'afpd'");
131 } else if (pid = cnid_metad_pid) {
136 cnid_metad_restarts++;
137 LOG(log_note, logtype_afpd, "Restarting 'cnid_metad' (restarts: %u)", cnid_metad_restarts);
138 if ((cnid_metad_pid = run_process(_PATH_CNID_METAD, "-d", "-F", obj.options.configfile, NULL)) == -1) {
139 LOG(log_error, logtype_afpd, "Error starting 'cnid_metad'");
143 LOG(log_error, logtype_afpd, "Bad pid: %d", pid);
147 if (in_shutdown && afpd_pid == -1 && cnid_metad_pid == -1)
148 event_base_loopbreak(base);
151 /******************************************************************
153 ******************************************************************/
155 /* kill processes passed as varargs of type "pid_t *", terminate list with NULL */
156 static void kill_childs(int sig, ...)
163 while ((pid = va_arg(args, pid_t *)) != NULL) {
171 /* this get called when error conditions are met that require us to exit gracefully */
172 static void netatalk_exit(int ret)
174 server_unlock(_PATH_NETATALK_LOCK);
178 /* this forks() and exec() "path" with varags as argc[] */
179 static pid_t run_process(const char *path, ...)
186 if ((pid = fork()) < 0) {
187 LOG(log_error, logtype_cnid, "error in fork: %s", strerror(errno));
192 myargv[i++] = (char *)path;
193 va_start(args, path);
194 while ((myargv[i++] = va_arg(args, char *)) != NULL)
198 ret = execv(path, myargv);
200 /* Yikes! We're still here, so exec failed... */
201 LOG(log_error, logtype_cnid, "Fatal error in exec: %s", strerror(errno));
207 static void usage(void)
209 printf("usage: netatalk [-F configfile] \n");
212 int main(int argc, char **argv)
214 const char *configfile = NULL;
215 int c, ret, debug = 0;
218 /* Log SIGBUS/SIGSEGV SBT */
221 while ((c = getopt(argc, argv, ":dF:")) != -1) {
227 obj.cmdlineconfigfile = strdup(optarg);
235 if (check_lockfile("netatalk", _PATH_NETATALK_LOCK) != 0)
238 if (!debug && daemonize(0, 0) != 0)
241 if (create_lockfile("netatalk", _PATH_NETATALK_LOCK) != 0)
244 sigfillset(&blocksigs);
245 sigprocmask(SIG_SETMASK, &blocksigs, NULL);
247 if (afp_config_parse(&obj) != 0)
248 netatalk_exit(EXITERR_CONF);
250 set_processname("netatalk");
251 setuplog(obj.options.logconfig, obj.options.logfile);
252 event_set_log_callback(libevent_logmsg_cb);
253 event_set_fatal_callback(netatalk_exit);
255 LOG(log_note, logtype_default, "Netatalk AFP server starting");
257 if ((afpd_pid = run_process(_PATH_AFPD, "-d", "-F", obj.options.configfile, NULL)) == -1) {
258 LOG(log_error, logtype_afpd, "Error starting 'cnid_metad'");
259 netatalk_exit(EXITERR_CONF);
262 if ((cnid_metad_pid = run_process(_PATH_CNID_METAD, "-d", "-F", obj.options.configfile, NULL)) == -1) {
263 LOG(log_error, logtype_afpd, "Error starting 'cnid_metad'");
264 netatalk_exit(EXITERR_CONF);
267 if ((base = event_base_new()) == NULL) {
268 LOG(log_error, logtype_afpd, "Error starting event loop");
269 netatalk_exit(EXITERR_CONF);
272 sigterm_ev = event_new(base, SIGTERM, EV_SIGNAL, sigterm_cb, NULL);
273 sigquit_ev = event_new(base, SIGQUIT, EV_SIGNAL | EV_PERSIST, sigquit_cb, NULL);
274 sigchld_ev = event_new(base, SIGCHLD, EV_SIGNAL | EV_PERSIST, sigchld_cb, NULL);
276 event_add(sigterm_ev, NULL);
277 event_add(sigquit_ev, NULL);
278 event_add(sigchld_ev, NULL);
280 sigfillset(&blocksigs);
281 sigdelset(&blocksigs, SIGTERM);
282 sigdelset(&blocksigs, SIGQUIT);
283 sigdelset(&blocksigs, SIGCHLD);
284 sigprocmask(SIG_SETMASK, &blocksigs, NULL);
286 /* run the event loop */
287 ret = event_base_dispatch(base);
289 /* got SIGTERM so we're going to shutdown */
291 /* block any signal but SIGCHLD */
292 sigfillset(&blocksigs);
293 sigdelset(&blocksigs, SIGCHLD);
294 sigprocmask(SIG_SETMASK, &blocksigs, NULL);
296 /* setup new events: remove SIGTERM and SIGQUIT cbs, add timeout */
298 tv.tv_sec = KILL_GRACETIME;
300 event_base_loopexit(base, &tv);
301 event_del(sigterm_ev);
302 event_del(sigquit_ev);
304 /* run the event loop again, waiting for child to exit on SIGTERM for KILL_GRACETIME seconds */
305 kill_childs(SIGTERM, &afpd_pid, &cnid_metad_pid, NULL);
306 ret = event_base_dispatch(base);
308 if (afpd_pid != -1 || cnid_metad_pid != -1) {
310 LOG(log_error, logtype_afpd, "AFP service did not shutdown, killing it");
311 if (cnid_metad_pid != -1)
312 LOG(log_error, logtype_afpd, "CNID database service did not shutdown, killing it");
313 kill_childs(SIGKILL, &afpd_pid, &cnid_metad_pid, NULL);