2 * Copyright (c) 1990,1993 Regents of The University of Michigan.
3 * All Rights Reserved. See COPYRIGHT.
8 #endif /* HAVE_CONFIG_H */
15 #include <sys/param.h>
17 #include <atalk/logger.h>
19 #include <sys/socket.h>
24 #include <atalk/adouble.h>
26 #include <netatalk/at.h>
27 #include <atalk/compat.h>
28 #include <atalk/dsi.h>
29 #include <atalk/atp.h>
30 #include <atalk/asp.h>
31 #include <atalk/afp.h>
32 #include <atalk/paths.h>
33 #include <atalk/util.h>
34 #include <atalk/server_child.h>
35 #include <atalk/server_ipc.h>
38 #include "afp_config.h"
42 #include "afp_zeroconf.h"
45 #include <sys/security.h>
50 static char **argv = NULL;
53 unsigned char nologin = 0;
55 struct afp_options default_options;
56 static AFPConfig *configs;
57 static server_child *server_children;
58 static sig_atomic_t reloadconfig = 0;
60 /* Two pointers to dynamic allocated arrays which store pollfds and associated data */
61 static struct pollfd *fdset;
62 static struct polldata *polldata;
63 static int fdset_size; /* current allocated size */
64 static int fdset_used; /* number of used elements */
68 void afp_get_cmdline( int *ac, char ***av)
75 /* This is registered with atexit() */
76 static void afp_exit(void)
78 if (parent_or_child == 0)
79 /* Only do this in the parent */
80 server_unlock(default_options.pidfile);
85 initialize fd set we are waiting for.
87 static void fd_set_listening_sockets(void)
91 for (config = configs; config; config = config->next) {
92 if (config->fd < 0) /* for proxies */
94 fdset_add_fd(&fdset, &polldata, &fdset_used, &fdset_size, config->fd, LISTEN_FD, config);
98 static void fd_reset_listening_sockets(void)
102 for (config = configs; config; config = config->next) {
103 if (config->fd < 0) /* for proxies */
105 fdset_del_fd(&fdset, &polldata, &fdset_used, &fdset_size, config->fd);
109 /* ------------------ */
110 static void afp_goaway(int sig)
116 #endif /* ! NO_DDP */
121 LOG(log_note, logtype_afpd, "AFP Server shutting down on SIGTERM");
124 server_child_kill(server_children, CHILD_DSIFORK, sig);
126 for (config = configs; config; config = config->next)
127 if (config->server_cleanup)
128 config->server_cleanup(config);
129 server_unlock(default_options.pidfile);
134 LOG(log_note, logtype_afpd, "AFP Server shutting down on SIGQUIT, NOT disconnecting clients");
136 for (config = configs; config; config = config->next)
137 if (config->server_cleanup)
138 config->server_cleanup(config);
140 server_unlock(default_options.pidfile);
147 LOG(log_info, logtype_afpd, "disallowing logins");
150 server_child_kill(server_children, CHILD_DSIFORK, sig);
154 /* w/ a configuration file, we can force a re-read if we want */
159 LOG(log_error, logtype_afpd, "afp_goaway: bad signal" );
164 static void child_handler(int sig _U_)
171 #define WAIT_ANY (-1)
172 #endif /* ! WAIT_ANY */
174 while ((pid = waitpid(WAIT_ANY, &status, WNOHANG)) > 0) {
175 for (i = 0; i < server_children->nforks; i++) {
176 if ((fd = server_child_remove(server_children, i, pid)) != -1) {
177 fdset_del_fd(&fdset, &polldata, &fdset_used, &fdset_size, fd);
182 if (WIFEXITED(status)) {
183 if (WEXITSTATUS(status))
184 LOG(log_info, logtype_afpd, "child[%d]: exited %d", pid, WEXITSTATUS(status));
186 LOG(log_info, logtype_afpd, "child[%d]: done", pid);
188 if (WIFSIGNALED(status))
189 LOG(log_info, logtype_afpd, "child[%d]: killed by signal %d", pid, WTERMSIG(status));
191 LOG(log_info, logtype_afpd, "child[%d]: died", pid);
196 int main(int ac, char **av)
208 set_auth_parameters( ac, av );
211 /* Log SIGBUS/SIGSEGV SBT */
214 /* Default log setup: log to syslog */
215 setuplog("default log_note");
217 afp_options_init(&default_options);
218 if (!afp_options_parse(ac, av, &default_options))
221 /* Save the user's current umask for use with CNID (and maybe some
222 * other things, too). */
223 default_options.save_mask = umask( default_options.umask );
225 switch(server_lock("afpd", default_options.pidfile,
226 default_options.flags & OPTION_DEBUG)) {
231 default: /* server */
236 /* install child handler for asp and dsi. we do this before afp_goaway
237 * as afp_goaway references stuff from here.
238 * XXX: this should really be setup after the initial connections. */
239 if (!(server_children = server_child_alloc(default_options.connections,
241 LOG(log_error, logtype_afpd, "main: server_child alloc: %s", strerror(errno) );
245 memset(&sv, 0, sizeof(sv));
246 /* linux at least up to 2.4.22 send a SIGXFZ for vfat fs,
247 even if the file is open with O_LARGEFILE ! */
249 sv.sa_handler = SIG_IGN;
250 sigemptyset( &sv.sa_mask );
251 if (sigaction(SIGXFSZ, &sv, NULL ) < 0 ) {
252 LOG(log_error, logtype_afpd, "main: sigaction: %s", strerror(errno) );
257 sv.sa_handler = child_handler;
258 sigemptyset( &sv.sa_mask );
259 sigaddset(&sv.sa_mask, SIGALRM);
260 sigaddset(&sv.sa_mask, SIGHUP);
261 sigaddset(&sv.sa_mask, SIGTERM);
262 sigaddset(&sv.sa_mask, SIGUSR1);
264 sv.sa_flags = SA_RESTART;
265 if ( sigaction( SIGCHLD, &sv, NULL ) < 0 ) {
266 LOG(log_error, logtype_afpd, "main: sigaction: %s", strerror(errno) );
270 sv.sa_handler = afp_goaway;
271 sigemptyset( &sv.sa_mask );
272 sigaddset(&sv.sa_mask, SIGALRM);
273 sigaddset(&sv.sa_mask, SIGTERM);
274 sigaddset(&sv.sa_mask, SIGHUP);
275 sigaddset(&sv.sa_mask, SIGCHLD);
276 sv.sa_flags = SA_RESTART;
277 if ( sigaction( SIGUSR1, &sv, NULL ) < 0 ) {
278 LOG(log_error, logtype_afpd, "main: sigaction: %s", strerror(errno) );
282 sigemptyset( &sv.sa_mask );
283 sigaddset(&sv.sa_mask, SIGALRM);
284 sigaddset(&sv.sa_mask, SIGTERM);
285 sigaddset(&sv.sa_mask, SIGUSR1);
286 sigaddset(&sv.sa_mask, SIGCHLD);
287 sv.sa_flags = SA_RESTART;
288 if ( sigaction( SIGHUP, &sv, NULL ) < 0 ) {
289 LOG(log_error, logtype_afpd, "main: sigaction: %s", strerror(errno) );
294 sigemptyset( &sv.sa_mask );
295 sigaddset(&sv.sa_mask, SIGALRM);
296 sigaddset(&sv.sa_mask, SIGHUP);
297 sigaddset(&sv.sa_mask, SIGUSR1);
298 sigaddset(&sv.sa_mask, SIGCHLD);
299 sv.sa_flags = SA_RESTART;
300 if ( sigaction( SIGTERM, &sv, NULL ) < 0 ) {
301 LOG(log_error, logtype_afpd, "main: sigaction: %s", strerror(errno) );
305 /* afpd.conf: not in config file: lockfile, connections, configfile
306 * preference: command-line provides defaults.
307 * config file over-writes defaults.
309 * we also need to make sure that killing afpd during startup
310 * won't leave any lingering registered names around.
314 sigaddset(&sigs, SIGALRM);
315 sigaddset(&sigs, SIGHUP);
316 sigaddset(&sigs, SIGUSR1);
318 /* don't block SIGTERM */
319 sigaddset(&sigs, SIGTERM);
321 sigaddset(&sigs, SIGCHLD);
323 pthread_sigmask(SIG_BLOCK, &sigs, NULL);
324 if (!(configs = configinit(&default_options))) {
325 LOG(log_error, logtype_afpd, "main: no servers configured");
328 pthread_sigmask(SIG_UNBLOCK, &sigs, NULL);
333 /* watch atp, dsi sockets and ipc parent/child file descriptor. */
334 fd_set_listening_sockets();
338 /* wait for an appleshare connection. parent remains in the loop
339 * while the children get handled by afp_over_{asp,dsi}. this is
340 * currently vulnerable to a denial-of-service attack if a
341 * connection is made without an actual login attempt being made
342 * afterwards. establishing timeouts for logins is a possible
345 LOG(log_maxdebug, logtype_afpd, "main: polling %i fds", fdset_used);
346 pthread_sigmask(SIG_UNBLOCK, &sigs, NULL);
347 ret = poll(fdset, fdset_used, -1);
348 pthread_sigmask(SIG_BLOCK, &sigs, NULL);
349 int saveerrno = errno;
354 fd_reset_listening_sockets();
356 LOG(log_info, logtype_afpd, "re-reading configuration file");
357 for (config = configs; config; config = config->next)
358 if (config->server_cleanup)
359 config->server_cleanup(config);
361 /* configfree close atp socket used for DDP tickle, there's an issue
363 configfree(configs, NULL);
364 if (!(configs = configinit(&default_options))) {
365 LOG(log_error, logtype_afpd, "config re-read: no servers configured");
369 fd_set_listening_sockets();
383 LOG(log_error, logtype_afpd, "main: can't wait for input: %s", strerror(errno));
387 for (int i = 0; i < fdset_used; i++) {
388 if (fdset[i].revents & POLLIN) {
389 switch (polldata[i].fdtype) {
391 config = (AFPConfig *)polldata[i].data;
392 /* config->server_start is afp_config.c:dsi_start() for DSI */
393 if (child = config->server_start(config, configs, server_children)) {
394 /* Add IPC fd to select fd set */
395 fdset_add_fd(&fdset, &polldata, &fdset_used, &fdset_size, child->ipc_fds[0], IPC_FD, child);
399 child = (afp_child_t *)polldata[i].data;
400 LOG(log_debug, logtype_afpd, "main: IPC request from child[%u]", child->pid);
401 if ((ret = ipc_server_read(server_children, child->ipc_fds[0])) == 0) {
402 fdset_del_fd(&fdset, &polldata, &fdset_used, &fdset_size, child->ipc_fds[0]);
403 close(child->ipc_fds[0]);
404 child->ipc_fds[0] = -1;
408 LOG(log_debug, logtype_afpd, "main: IPC request for unknown type");