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 static char *sites_key
="sites";
26 bool_t just_check_config
=False
;
27 static char *userid
=NULL
;
29 bool_t background
=True
;
30 static char *pidfile
=NULL
;
31 bool_t require_root_privileges
=False
;
32 string_t require_root_privileges_explanation
=NULL
;
34 static pid_t secnet_pid
;
37 extern uint32_t message_level
;
38 extern bool_t secnet_is_daemon
;
39 extern struct log_if
*system_log
;
42 extern void start_signal_handling(void);
44 /* Structures dealing with poll() call */
45 struct poll_interest
{
46 beforepoll_fn
*before
;
52 struct poll_interest
*next
;
54 static struct poll_interest
*reg
=NULL
;
55 static uint32_t total_nfds
=10;
57 static bool_t finished
=False
;
59 /* Parse the command line options */
60 static void parse_options(int argc
, char **argv
)
66 static struct option long_options
[] = {
67 {"verbose", 0, 0, 'v'},
68 {"nowarnings", 0, 0, 'w'},
71 {"nodetach", 0, 0, 'n'},
72 {"silent", 0, 0, 'f'},
75 {"config", 1, 0, 'c'},
76 {"just-check-config", 0, 0, 'j'},
77 {"sites-key", 1, 0, 's'},
81 c
=getopt_long(argc
, argv
, "vwdnjc:ft:s:",
82 long_options
, &option_index
);
90 "Usage: secnet [OPTION]...\n\n"
91 " -f, --silent, --quiet suppress error messages\n"
92 " -w, --nowarnings suppress warnings\n"
93 " -v, --verbose output extra diagnostics\n"
94 " -c, --config=filename specify a configuration file\n"
95 " -j, --just-check-config stop after reading "
96 "configuration file\n"
97 " -s, --sites-key=name configuration key that "
98 "specifies active sites\n"
99 " -n, --nodetach do not run in background\n"
100 " -d, --debug=item,... set debug options\n"
101 " --help display this help and exit\n"
102 " --version output version information "
110 fprintf(stderr
,"%s\n",version
);
115 message_level
|=M_INFO
|M_NOTICE
|M_WARNING
|M_ERR
|M_SECURITY
|
120 message_level
&=(~M_WARNING
);
124 message_level
|=M_DEBUG_CONFIG
|M_DEBUG_PHASE
|M_DEBUG
;
128 message_level
=M_FATAL
;
137 configfile
=safe_strdup(optarg
,"config_filename");
139 fatal("secnet: no config filename specified");
143 just_check_config
=True
;
148 sites_key
=safe_strdup(optarg
,"sites-key");
150 fatal("secnet: no sites key specified");
157 Message(M_ERR
,"secnet: Unknown getopt code %c\n",c
);
161 if (argc
-optind
!= 0) {
162 Message(M_ERR
,"secnet: You gave extra command line parameters, "
163 "which were ignored.\n");
167 static void setup(dict_t
*config
)
176 l
=dict_lookup(config
,"system");
178 if (!l
|| list_elem(l
,0)->type
!=t_dict
) {
179 fatal("configuration does not include a \"system\" dictionary\n");
181 system
=list_elem(l
,0)->data
.dict
;
182 loc
=list_elem(l
,0)->loc
;
184 /* Arrange systemwide log facility */
185 l
=dict_lookup(system
,"log");
187 fatal("configuration does not include a system/log facility\n");
189 system_log
=init_log(l
);
191 /* Who are we supposed to run as? */
192 userid
=dict_read_string(system
,"userid",False
,"system",loc
);
196 if (pw
&& strcmp(pw
->pw_name
,userid
)==0) {
203 fatal("userid \"%s\" not found\n",userid
);
208 pidfile
=dict_read_string(system
,"pidfile",False
,"system",loc
);
210 /* Check whether we need root privileges */
211 if (require_root_privileges
&& uid
!=0) {
212 fatal("the following configured feature (\"%s\") requires "
213 "that secnet retain root privileges while running.\n",
214 require_root_privileges_explanation
);
217 /* Go along site list, starting sites */
218 l
=dict_lookup(config
,sites_key
);
220 Message(M_WARNING
,"secnet: configuration key \"%s\" is missing; no "
221 "remote sites are defined\n",sites_key
);
224 while ((site
=list_elem(l
, i
++))) {
226 if (site
->type
!=t_closure
) {
227 cfgfatal(site
->loc
,"system","non-closure in site list");
229 if (site
->data
.closure
->type
!=CL_SITE
) {
230 cfgfatal(site
->loc
,"system","non-site closure in site list");
232 s
=site
->data
.closure
->interface
;
233 s
->control(s
->st
,True
);
238 void register_for_poll(void *st
, beforepoll_fn
*before
,
239 afterpoll_fn
*after
, uint32_t max_nfds
, string_t desc
)
241 struct poll_interest
*i
;
243 i
=safe_malloc(sizeof(*i
),"register_for_poll");
247 i
->max_nfds
=max_nfds
;
250 total_nfds
+=max_nfds
;
256 static void system_phase_hook(void *sst
, uint32_t newphase
)
258 if (newphase
==PHASE_SHUTDOWN
&& pidfile
) {
259 /* Try to unlink the pidfile; don't care if it fails */
264 static void run(void)
266 struct timeval tv_now
;
268 struct poll_interest
*i
;
269 int rv
, nfds
, remain
, idx
;
273 fds
=alloca(sizeof(*fds
)*total_nfds
);
275 fatal("run: couldn't alloca\n");
278 Message(M_NOTICE
,"%s [%d]: starting\n",version
,secnet_pid
);
281 if (gettimeofday(&tv_now
, NULL
)!=0) {
282 fatal_perror("main loop: gettimeofday");
284 now
=(tv_now
.tv_sec
*1000)+(tv_now
.tv_usec
/1000);
286 for (i
=reg
; i
; i
=i
->next
) {
287 i
->after(i
->state
, fds
+idx
, i
->nfds
, &tv_now
, &now
);
293 for (i
=reg
; i
; i
=i
->next
) {
295 rv
=i
->before(i
->state
, fds
+idx
, &nfds
, &timeout
, &tv_now
, &now
);
297 /* XXX we need to handle this properly: increase the
299 fatal("run: beforepoll_fn (%s) returns %d\n",i
->desc
,rv
);
302 fatal("run: beforepoll_fn (%s) set timeout to %d\n",timeout
);
310 rv
=poll(fds
, idx
, timeout
);
313 fatal_perror("run: poll");
320 static void droppriv(void)
325 add_hook(PHASE_SHUTDOWN
,system_phase_hook
,NULL
);
327 /* Open the pidfile for writing now: we may be unable to do so
328 once we drop privileges. */
330 pf
=fopen(pidfile
,"w");
332 fatal_perror("cannot open pidfile \"%s\"",pidfile
);
335 if (!background
&& pf
) {
336 fprintf(pf
,"%d\n",getpid());
340 /* Now drop privileges */
342 if (setuid(uid
)!=0) {
343 fatal_perror("can't set uid to \"%s\"",userid
);
350 /* Parent process - write pidfile, exit */
351 fprintf(pf
,"%d\n",p
);
356 /* Child process - all done, just carry on */
358 /* Close stdin, stdout and stderr; we don't need them any more */
362 secnet_is_daemon
=True
;
365 fatal_perror("cannot fork");
372 static signal_notify_fn finish
,ignore_hup
;
373 static void finish(void *st
, int signum
)
376 Message(M_NOTICE
,"%s [%d]: received %s\n",version
,secnet_pid
,(string_t
)st
);
378 static void ignore_hup(void *st
, int signum
)
380 Message(M_INFO
,"%s [%d]: received SIGHUP\n",version
,secnet_pid
);
384 int main(int argc
, char **argv
)
388 enter_phase(PHASE_GETOPTS
);
389 parse_options(argc
,argv
);
391 enter_phase(PHASE_READCONFIG
);
392 config
=read_conffile(configfile
);
394 enter_phase(PHASE_SETUP
);
397 if (just_check_config
) {
398 Message(M_INFO
,"configuration file check complete\n");
402 enter_phase(PHASE_GETRESOURCES
);
403 /* Appropriate phase hooks will have been run */
405 enter_phase(PHASE_DROPPRIV
);
408 start_signal_handling();
409 request_signal_notification(SIGTERM
,finish
,"SIGTERM");
410 if (!background
) request_signal_notification(SIGINT
,finish
,"SIGINT");
411 request_signal_notification(SIGHUP
,ignore_hup
,NULL
);
412 enter_phase(PHASE_RUN
);
415 enter_phase(PHASE_SHUTDOWN
);
416 Message(M_NOTICE
,"%s [%d]: finished\n",version
,secnet_pid
);