2 * Revision 1.1 1996/03/13 22:27:41 sde1000
15 #include <sys/socket.h>
16 #include <arpa/inet.h>
22 /* XXX should be from autoconf */
23 static char *configfile="/etc/secnet/secnet.conf";
24 bool_t just_check_config=False;
25 static char *userid=NULL;
27 bool_t background=True;
28 static char *pidfile=NULL;
29 bool_t require_root_privileges=False;
30 string_t require_root_privileges_explanation=NULL;
32 /* Structures dealing with poll() call */
33 struct poll_interest {
34 beforepoll_fn *before;
40 struct poll_interest *next;
42 static struct poll_interest *reg=NULL;
43 static uint32_t total_nfds=10;
45 static bool_t finished=False;
47 /* Parse the command line options */
48 static void parse_options(int argc, char **argv)
54 static struct option long_options[] = {
55 {"verbose", 0, 0, 'v'},
56 {"nowarnings", 0, 0, 'w'},
59 {"nodetach", 0, 0, 'n'},
60 {"silent", 0, 0, 'f'},
63 {"config", 1, 0, 'c'},
64 {"just-check-config", 0, 0, 'j'},
68 c=getopt_long(argc, argv, "vwdnjc:ft:",
69 long_options, &option_index);
77 "Usage: secnet [OPTION]...\n\n"
78 " -f, --silent, --quiet suppress error messages\n"
79 " -w, --nowarnings suppress warnings\n"
80 " -v, --verbose output extra diagnostics\n"
81 " -c, --config=filename specify a configuration file\n"
82 " -j, --just-check-config stop after reading configfile\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_NOTICE|M_WARNING|M_ERROR|M_SECURITY|
103 message_level&=(~M_WARNING);
107 message_level|=M_DEBUG_CONFIG|M_DEBUG_PHASE|M_DEBUG;
111 message_level=M_FATAL;
120 configfile=safe_strdup(optarg,"config_filename");
122 fatal("secnet: no config filename specified");
126 just_check_config=True;
133 Message(M_ERROR,"secnet: Unknown getopt code %c\n",c);
137 if (argc-optind != 0) {
138 Message(M_ERROR,"secnet: You gave extra command line parameters, "
139 "which were ignored.\n");
143 static void setup(dict_t *config)
152 l=dict_lookup(config,"system");
154 if (!l || list_elem(l,0)->type!=t_dict) {
155 fatal("configuration does not include a \"system\" dictionary\n");
157 system=list_elem(l,0)->data.dict;
158 loc=list_elem(l,0)->loc;
160 /* Arrange systemwide log facility */
161 l=dict_lookup(system,"log");
163 fatal("configuration does not include a system/log facility\n");
165 system_log=init_log(l);
167 /* Who are we supposed to run as? */
168 userid=dict_read_string(system,"userid",False,"system",loc);
172 if (pw && strcmp(pw->pw_name,userid)==0) {
179 fatal("userid \"%s\" not found\n",userid);
184 pidfile=dict_read_string(system,"pidfile",False,"system",loc);
186 /* Check whether we need root privileges */
187 if (require_root_privileges && uid!=0) {
188 fatal("the following configured feature (\"%s\") requires "
189 "that secnet retain root privileges while running.\n",
190 require_root_privileges_explanation);
193 /* Go along site list, starting sites */
194 l=dict_lookup(config,"sites");
196 Message(M_WARNING,"secnet: configuration did not define any "
200 while ((site=list_elem(l, i++))) {
202 if (site->type!=t_closure) {
203 cfgfatal(site->loc,"system","non-closure in site list");
205 if (site->data.closure->type!=CL_SITE) {
206 cfgfatal(site->loc,"system","non-site closure in site list");
208 s=site->data.closure->interface;
209 s->control(s->st,True);
214 void register_for_poll(void *st, beforepoll_fn *before,
215 afterpoll_fn *after, uint32_t max_nfds, string_t desc)
217 struct poll_interest *i;
219 i=safe_malloc(sizeof(*i),"register_for_poll");
223 i->max_nfds=max_nfds;
226 total_nfds+=max_nfds;
232 static void system_phase_hook(void *sst, uint32_t newphase)
234 if (newphase==PHASE_SHUTDOWN && pidfile) {
235 /* Try to unlink the pidfile; don't care if it fails */
240 static void run(void)
242 struct timeval tv_now;
244 struct poll_interest *i;
245 int rv, nfds, remain, idx;
249 fds=alloca(sizeof(*fds)*total_nfds);
251 fatal("run: couldn't alloca\n");
254 Message(M_NOTICE,"%s: starting\n",version);
257 if (gettimeofday(&tv_now, NULL)!=0) {
258 fatal_perror("main loop: gettimeofday");
260 now=(tv_now.tv_sec*1000)+(tv_now.tv_usec/1000);
262 for (i=reg; i; i=i->next) {
263 i->after(i->state, fds+idx, i->nfds, &tv_now, &now);
269 for (i=reg; i; i=i->next) {
271 rv=i->before(i->state, fds+idx, &nfds, &timeout, &tv_now, &now);
273 /* XXX we need to handle this properly: increase the
275 fatal("run: beforepoll_fn (%s) returns %d\n",i->desc,rv);
278 fatal("run: beforepoll_fn (%s) set timeout to %d\n",timeout);
285 rv=poll(fds, idx, timeout);
288 fatal_perror("run: poll");
295 static void droppriv(void)
300 add_hook(PHASE_SHUTDOWN,system_phase_hook,NULL);
302 /* Open the pidfile for writing now: we may be unable to do so
303 once we drop privileges. */
305 pf=fopen(pidfile,"w");
307 fatal_perror("cannot open pidfile \"%s\"",pidfile);
310 if (!background && pf) {
311 fprintf(pf,"%d\n",getpid());
315 /* Now drop privileges */
317 if (setuid(uid)!=0) {
318 fatal_perror("can't set uid to \"%s\"",userid);
325 /* Parent process - write pidfile, exit */
326 fprintf(pf,"%d\n",p);
331 /* Child process - all done, just carry on */
333 secnet_is_daemon=True;
336 fatal_perror("cannot fork");
343 int main(int argc, char **argv)
347 enter_phase(PHASE_GETOPTS);
348 parse_options(argc,argv);
350 enter_phase(PHASE_READCONFIG);
351 config=read_conffile(configfile);
353 enter_phase(PHASE_SETUP);
356 if (just_check_config) {
357 Message(M_INFO,"configuration file check complete\n");
361 enter_phase(PHASE_GETRESOURCES);
362 /* Appropriate phase hooks will have been run */
364 enter_phase(PHASE_DROPPRIV);
367 enter_phase(PHASE_RUN);
370 enter_phase(PHASE_SHUTDOWN);