2 * Revision 1.1 1996/03/13 22:27:41 sde1000
14 #include <sys/types.h>
15 #include <sys/socket.h>
18 #include <netinet/in.h>
19 #include <arpa/inet.h>
27 /* Command-line options (possibly config-file options too) */
28 static char *configfile="/etc/secnet/secnet.conf";
29 static char *userid=NULL;
31 static bool_t background=True;
32 static char *pidfile=NULL;
34 /* Structures dealing with poll() call */
35 struct poll_interest {
36 beforepoll_fn *before;
42 struct poll_interest *next;
44 static struct poll_interest *reg=NULL;
45 static uint32_t total_nfds=10;
47 static bool_t finished=False;
49 /* Parse the command line options */
50 static void parse_options(int argc, char **argv)
56 static struct option long_options[] = {
57 {"verbose", 0, 0, 'v'},
58 {"nowarnings", 0, 0, 'w'},
61 {"nodetach", 0, 0, 'n'},
62 {"silent", 0, 0, 'f'},
65 {"config", 1, 0, 'c'},
69 c=getopt_long(argc, argv, "vwdnc:ft:",
70 long_options, &option_index);
78 "Usage: secnet [OPTION]...\n\n"
79 " -f, --silent, --quiet suppress error messages\n"
80 " -w, --nowarnings suppress warnings\n"
81 " -v, --verbose output extra diagnostics\n"
82 " -c, --config=filename specify a configuration file\n"
83 " -n, --nodetach do not run in background\n"
84 " -d, --debug=item,... set debug options\n"
85 " --help display this help and exit\n"
86 " --version output version information and exit\n"
93 fprintf(stderr,"%s\n",version);
98 message_level|=M_INFO|M_WARNING|M_ERROR|M_FATAL;
106 message_level|=M_DEBUG_CONFIG|M_DEBUG_PHASE;
110 message_level=M_FATAL;
115 configfile=safe_strdup(optarg,"config_filename");
117 fatal("secnet: no config filename specified");
124 Message(M_WARNING,"secnet: Unknown getopt code %c\n",c);
128 if (argc-optind != 0) {
129 Message(M_WARNING,"secnet: You gave extra command line parameters, "
130 "which were ignored.\n");
134 static void setup(dict_t *config)
144 l=dict_lookup(config,"system");
146 if (!l || list_elem(l,0)->type!=t_dict) {
147 fatal("configuration does not include a \"system\" dictionary\n");
149 system=list_elem(l,0)->data.dict;
150 loc=list_elem(l,0)->loc;
152 /* Arrange systemwide log facility */
153 l=dict_lookup(system,"log");
155 fatal("configuration does not include a system/log facility\n");
158 log->log(log->st,LOG_DEBUG,"%s: logging started",version);
160 /* Who are we supposed to run as? */
161 userid=dict_read_string(system,"userid",False,"system",loc);
165 if (pw && strcmp(pw->pw_name,userid)==0) {
172 fatal("userid \"%s\" not found\n",userid);
177 pidfile=dict_read_string(system,"pidfile",False,"system",loc);
179 /* Go along site list, starting sites */
180 l=dict_lookup(config,"sites");
182 fatal("configuration did not define any remote sites\n");
185 while ((site=list_elem(l, i++))) {
187 if (site->type!=t_closure) {
188 cfgfatal(site->loc,"system","non-closure in site list");
190 if (site->data.closure->type!=CL_SITE) {
191 cfgfatal(site->loc,"system","non-site closure in site list");
193 s=site->data.closure->interface;
194 s->control(s->st,True);
198 void register_for_poll(void *st, beforepoll_fn *before,
199 afterpoll_fn *after, uint32_t max_nfds, string_t desc)
201 struct poll_interest *i;
203 i=safe_malloc(sizeof(*i),"register_for_poll");
207 i->max_nfds=max_nfds;
210 total_nfds+=max_nfds;
216 static void system_phase_hook(void *sst, uint32_t newphase)
218 if (newphase==PHASE_SHUTDOWN && pidfile) {
219 /* Try to unlink the pidfile; don't care if it fails */
224 static void run(void)
226 struct timeval tv_now;
228 struct poll_interest *i;
229 int rv, nfds, remain, idx;
233 fds=alloca(sizeof(*fds)*total_nfds);
235 fatal("run: couldn't alloca\n");
239 if (gettimeofday(&tv_now, NULL)!=0) {
240 fatal_perror("main loop: gettimeofday");
242 now=(tv_now.tv_sec*1000)+(tv_now.tv_usec/1000);
244 for (i=reg; i; i=i->next) {
245 i->after(i->state, fds+idx, i->nfds, &tv_now, &now);
251 for (i=reg; i; i=i->next) {
253 rv=i->before(i->state, fds+idx, &nfds, &timeout, &tv_now, &now);
255 /* XXX we need to handle this properly: increase the
257 fatal("run: beforepoll_fn (%s) returns %d\n",i->desc,rv);
260 fatal("run: beforepoll_fn (%s) set timeout to %d\n",timeout);
267 rv=poll(fds, idx, timeout);
270 fatal_perror("run: poll");
277 static void droppriv(void)
282 add_hook(PHASE_SHUTDOWN,system_phase_hook,NULL);
284 /* Background now, if we're supposed to: we may be unable to write the
285 pidfile if we don't. */
287 printf("goto background\n");
288 /* Open the pidfile before forking - that way the parent can tell
289 whether it succeeds */
291 pf=fopen(pidfile,"w");
293 fatal_perror("cannot open pidfile \"%s\"",pidfile);
296 Message(M_WARNING,"secnet: no pidfile configured, but "
297 "backgrounding anyway\n");
302 /* Parent process - write pidfile, exit */
303 fprintf(pf,"%d\n",p);
308 /* Child process - all done, just carry on */
313 fatal_perror("cannot fork");
318 pf=fopen(pidfile,"w");
320 fatal_perror("cannot open pidfile \"%s\"",pidfile);
322 fprintf(pf,"%d\n",getpid());
327 /* Drop privilege now, if configured to do so */
329 if (setuid(uid)!=0) {
330 fatal_perror("can't set uid to \"%s\"",userid);
335 int main(int argc, char **argv)
339 enter_phase(PHASE_GETOPTS);
340 parse_options(argc,argv);
342 enter_phase(PHASE_READCONFIG);
343 config=read_conffile(configfile);
345 enter_phase(PHASE_SETUP);
348 enter_phase(PHASE_DROPPRIV);
351 enter_phase(PHASE_RUN);
354 enter_phase(PHASE_SHUTDOWN);