2 * Revision 1.1 1996/03/13 22:27:41 sde1000
7 static char *version="secnet version " VERSION " $Date: 1996/03/13 22:27:41 $";
14 #include <sys/socket.h>
17 #include <netinet/in.h>
18 #include <arpa/inet.h>
21 #include <sys/types.h>
28 /* Command-line options (possibly config-file options too) */
29 static char *configfile="/etc/secnet/secnet.conf";
30 static char *userid=NULL;
32 static bool_t background=True;
33 static char *pidfile=NULL;
35 /* Structures dealing with poll() call */
36 struct poll_interest {
37 beforepoll_fn *before;
43 struct poll_interest *next;
45 static struct poll_interest *reg=NULL;
46 static uint32_t total_nfds=10;
48 static bool_t finished=False;
50 /* Parse the command line options */
51 static void parse_options(int argc, char **argv)
57 static struct option long_options[] = {
58 {"verbose", 0, 0, 'v'},
59 {"nowarnings", 0, 0, 'w'},
62 {"nodetach", 0, 0, 'n'},
63 {"silent", 0, 0, 'f'},
66 {"config", 1, 0, 'c'},
70 c=getopt_long(argc, argv, "vwdnc:ft:",
71 long_options, &option_index);
79 "Usage: secnet [OPTION]...\n\n"
80 " -f, --silent, --quiet suppress error messages\n"
81 " -w, --nowarnings suppress warnings\n"
82 " -v, --verbose output extra diagnostics\n"
83 " -c, --config=filename specify a configuration file\n"
84 " -n, --nodetach do not run in background\n"
85 " -d, --debug=item,... set debug options\n"
86 " --help display this help and exit\n"
87 " --version output version information and exit\n"
94 fprintf(stderr,"%s\n",version);
99 message_level|=M_INFO|M_WARNING|M_ERROR|M_FATAL;
107 message_level|=M_DEBUG_CONFIG|M_DEBUG_PHASE;
111 message_level=M_FATAL;
116 configfile=safe_strdup(optarg,"config_filename");
118 fatal("secnet: no config filename specified");
125 Message(M_WARNING,"secnet: Unknown getopt code %c\n",c);
129 if (argc-optind != 0) {
130 Message(M_WARNING,"secnet: You gave extra command line parameters, "
131 "which were ignored.\n");
135 static void setup(dict_t *config)
145 l=dict_lookup(config,"system");
147 if (!l || list_elem(l,0)->type!=t_dict) {
148 fatal("configuration does not include a \"system\" dictionary\n");
150 system=list_elem(l,0)->data.dict;
151 loc=list_elem(l,0)->loc;
153 /* Arrange systemwide log facility */
154 l=dict_lookup(system,"log");
156 fatal("configuration does not include a system/log facility\n");
159 log->log(log->st,LOG_DEBUG,"secnet " VERSION ": logging started");
161 /* Who are we supposed to run as? */
162 userid=dict_read_string(system,"userid",False,"system",loc);
166 if (pw && strcmp(pw->pw_name,userid)==0) {
173 fatal("userid \"%s\" not found\n",userid);
178 pidfile=dict_read_string(system,"pidfile",False,"system",loc);
180 /* Go along site list, starting sites */
181 l=dict_lookup(config,"sites");
183 fatal("configuration did not define any remote sites\n");
186 while ((site=list_elem(l, i++))) {
188 if (site->type!=t_closure) {
189 cfgfatal(site->loc,"system","non-closure in site list");
191 if (site->data.closure->type!=CL_SITE) {
192 cfgfatal(site->loc,"system","non-site closure in site list");
194 s=site->data.closure->interface;
195 s->control(s->st,True);
199 void register_for_poll(void *st, beforepoll_fn *before,
200 afterpoll_fn *after, uint32_t max_nfds, string_t desc)
202 struct poll_interest *i;
204 i=safe_malloc(sizeof(*i),"register_for_poll");
208 i->max_nfds=max_nfds;
211 total_nfds+=max_nfds;
217 static void system_phase_hook(void *sst, uint32_t newphase)
219 if (newphase==PHASE_SHUTDOWN && pidfile) {
220 /* Try to unlink the pidfile; don't care if it fails */
225 static void run(void)
227 struct timeval tv_now;
229 struct poll_interest *i;
230 int rv, nfds, remain, idx;
234 fds=alloca(sizeof(*fds)*total_nfds);
236 fatal("run: couldn't alloca\n");
240 if (gettimeofday(&tv_now, NULL)!=0) {
241 fatal_perror("main loop: gettimeofday");
243 now=(tv_now.tv_sec*1000)+(tv_now.tv_usec/1000);
245 for (i=reg; i; i=i->next) {
246 i->after(i->state, fds+idx, i->nfds, &tv_now, &now);
252 for (i=reg; i; i=i->next) {
254 rv=i->before(i->state, fds+idx, &nfds, &timeout, &tv_now, &now);
256 /* XXX we need to handle this properly: increase the
258 fatal("run: beforepoll_fn (%s) returns %d\n",i->desc,rv);
261 fatal("run: beforepoll_fn (%s) set timeout to %d\n",timeout);
268 rv=poll(fds, idx, timeout);
271 fatal_perror("run: poll");
278 static void droppriv(void)
283 add_hook(PHASE_SHUTDOWN,system_phase_hook,NULL);
285 /* Background now, if we're supposed to: we may be unable to write the
286 pidfile if we don't. */
288 printf("goto background\n");
289 /* Open the pidfile before forking - that way the parent can tell
290 whether it succeeds */
292 pf=fopen(pidfile,"w");
294 fatal_perror("cannot open pidfile \"%s\"",pidfile);
297 Message(M_WARNING,"secnet: no pidfile configured, but "
298 "backgrounding anyway\n");
303 /* Parent process - write pidfile, exit */
304 fprintf(pf,"%d\n",p);
309 /* Child process - all done, just carry on */
314 fatal_perror("cannot fork");
319 pf=fopen(pidfile,"w");
321 fatal_perror("cannot open pidfile \"%s\"",pidfile);
323 fprintf(pf,"%d\n",getpid());
328 /* Drop privilege now, if configured to do so */
330 if (setuid(uid)!=0) {
331 fatal_perror("can't set uid to \"%s\"",userid);
336 int main(int argc, char **argv)
340 enter_phase(PHASE_GETOPTS);
341 parse_options(argc,argv);
343 enter_phase(PHASE_READCONFIG);
344 config=read_conffile(configfile);
346 enter_phase(PHASE_SETUP);
349 enter_phase(PHASE_DROPPRIV);
352 enter_phase(PHASE_RUN);
355 enter_phase(PHASE_SHUTDOWN);