2 * Revision 1.1 1996/03/13 22:27:41 sde1000
15 #include <sys/socket.h>
16 #include <arpa/inet.h>
23 /* XXX should be from autoconf */
24 static char *configfile="/etc/secnet/secnet.conf";
25 bool_t just_check_config=False;
26 static char *userid=NULL;
28 bool_t background=True;
29 static char *pidfile=NULL;
30 bool_t require_root_privileges=False;
31 string_t require_root_privileges_explanation=NULL;
33 static pid_t secnet_pid;
36 extern uint32_t message_level;
37 extern bool_t secnet_is_daemon;
38 extern struct log_if *system_log;
41 extern void start_signal_handling(void);
43 /* Structures dealing with poll() call */
44 struct poll_interest {
45 beforepoll_fn *before;
51 struct poll_interest *next;
53 static struct poll_interest *reg=NULL;
54 static uint32_t total_nfds=10;
56 static bool_t finished=False;
58 /* Parse the command line options */
59 static void parse_options(int argc, char **argv)
65 static struct option long_options[] = {
66 {"verbose", 0, 0, 'v'},
67 {"nowarnings", 0, 0, 'w'},
70 {"nodetach", 0, 0, 'n'},
71 {"silent", 0, 0, 'f'},
74 {"config", 1, 0, 'c'},
75 {"just-check-config", 0, 0, 'j'},
79 c=getopt_long(argc, argv, "vwdnjc:ft:",
80 long_options, &option_index);
88 "Usage: secnet [OPTION]...\n\n"
89 " -f, --silent, --quiet suppress error messages\n"
90 " -w, --nowarnings suppress warnings\n"
91 " -v, --verbose output extra diagnostics\n"
92 " -c, --config=filename specify a configuration file\n"
93 " -j, --just-check-config stop after reading configfile\n"
94 " -n, --nodetach do not run in background\n"
95 " -d, --debug=item,... set debug options\n"
96 " --help display this help and exit\n"
97 " --version output version information and exit\n"
104 fprintf(stderr,"%s\n",version);
109 message_level|=M_INFO|M_NOTICE|M_WARNING|M_ERROR|M_SECURITY|
114 message_level&=(~M_WARNING);
118 message_level|=M_DEBUG_CONFIG|M_DEBUG_PHASE|M_DEBUG;
122 message_level=M_FATAL;
131 configfile=safe_strdup(optarg,"config_filename");
133 fatal("secnet: no config filename specified");
137 just_check_config=True;
144 Message(M_ERROR,"secnet: Unknown getopt code %c\n",c);
148 if (argc-optind != 0) {
149 Message(M_ERROR,"secnet: You gave extra command line parameters, "
150 "which were ignored.\n");
154 static void setup(dict_t *config)
163 l=dict_lookup(config,"system");
165 if (!l || list_elem(l,0)->type!=t_dict) {
166 fatal("configuration does not include a \"system\" dictionary\n");
168 system=list_elem(l,0)->data.dict;
169 loc=list_elem(l,0)->loc;
171 /* Arrange systemwide log facility */
172 l=dict_lookup(system,"log");
174 fatal("configuration does not include a system/log facility\n");
176 system_log=init_log(l);
178 /* Who are we supposed to run as? */
179 userid=dict_read_string(system,"userid",False,"system",loc);
183 if (pw && strcmp(pw->pw_name,userid)==0) {
190 fatal("userid \"%s\" not found\n",userid);
195 pidfile=dict_read_string(system,"pidfile",False,"system",loc);
197 /* Check whether we need root privileges */
198 if (require_root_privileges && uid!=0) {
199 fatal("the following configured feature (\"%s\") requires "
200 "that secnet retain root privileges while running.\n",
201 require_root_privileges_explanation);
204 /* Go along site list, starting sites */
205 l=dict_lookup(config,"sites");
207 Message(M_WARNING,"secnet: configuration did not define any "
211 while ((site=list_elem(l, i++))) {
213 if (site->type!=t_closure) {
214 cfgfatal(site->loc,"system","non-closure in site list");
216 if (site->data.closure->type!=CL_SITE) {
217 cfgfatal(site->loc,"system","non-site closure in site list");
219 s=site->data.closure->interface;
220 s->control(s->st,True);
225 void register_for_poll(void *st, beforepoll_fn *before,
226 afterpoll_fn *after, uint32_t max_nfds, string_t desc)
228 struct poll_interest *i;
230 i=safe_malloc(sizeof(*i),"register_for_poll");
234 i->max_nfds=max_nfds;
237 total_nfds+=max_nfds;
243 static void system_phase_hook(void *sst, uint32_t newphase)
245 if (newphase==PHASE_SHUTDOWN && pidfile) {
246 /* Try to unlink the pidfile; don't care if it fails */
251 static void run(void)
253 struct timeval tv_now;
255 struct poll_interest *i;
256 int rv, nfds, remain, idx;
260 fds=alloca(sizeof(*fds)*total_nfds);
262 fatal("run: couldn't alloca\n");
265 Message(M_NOTICE,"%s [%d]: starting\n",version,secnet_pid);
268 if (gettimeofday(&tv_now, NULL)!=0) {
269 fatal_perror("main loop: gettimeofday");
271 now=(tv_now.tv_sec*1000)+(tv_now.tv_usec/1000);
273 for (i=reg; i; i=i->next) {
274 i->after(i->state, fds+idx, i->nfds, &tv_now, &now);
280 for (i=reg; i; i=i->next) {
282 rv=i->before(i->state, fds+idx, &nfds, &timeout, &tv_now, &now);
284 /* XXX we need to handle this properly: increase the
286 fatal("run: beforepoll_fn (%s) returns %d\n",i->desc,rv);
289 fatal("run: beforepoll_fn (%s) set timeout to %d\n",timeout);
297 rv=poll(fds, idx, timeout);
300 fatal_perror("run: poll");
307 static void droppriv(void)
312 add_hook(PHASE_SHUTDOWN,system_phase_hook,NULL);
314 /* Open the pidfile for writing now: we may be unable to do so
315 once we drop privileges. */
317 pf=fopen(pidfile,"w");
319 fatal_perror("cannot open pidfile \"%s\"",pidfile);
322 if (!background && pf) {
323 fprintf(pf,"%d\n",getpid());
327 /* Now drop privileges */
329 if (setuid(uid)!=0) {
330 fatal_perror("can't set uid to \"%s\"",userid);
337 /* Parent process - write pidfile, exit */
338 fprintf(pf,"%d\n",p);
343 /* Child process - all done, just carry on */
345 secnet_is_daemon=True;
348 fatal_perror("cannot fork");
355 static signal_notify_fn finish,ignore_hup;
356 static void finish(void *st, int signum)
359 Message(M_NOTICE,"%s [%d]: received %s\n",version,secnet_pid,(string_t)st);
361 static void ignore_hup(void *st, int signum)
363 Message(M_INFO,"%s [%d]: received SIGHUP\n",version,secnet_pid);
367 int main(int argc, char **argv)
371 enter_phase(PHASE_GETOPTS);
372 parse_options(argc,argv);
374 enter_phase(PHASE_READCONFIG);
375 config=read_conffile(configfile);
377 enter_phase(PHASE_SETUP);
380 if (just_check_config) {
381 Message(M_INFO,"configuration file check complete\n");
385 enter_phase(PHASE_GETRESOURCES);
386 /* Appropriate phase hooks will have been run */
388 enter_phase(PHASE_DROPPRIV);
391 start_signal_handling();
392 request_signal_notification(SIGTERM,finish,"SIGTERM");
393 if (!background) request_signal_notification(SIGINT,finish,"SIGINT");
394 request_signal_notification(SIGHUP,ignore_hup,NULL);
395 enter_phase(PHASE_RUN);
398 enter_phase(PHASE_SHUTDOWN);
399 Message(M_NOTICE,"%s [%d]: finished\n",version,secnet_pid);