9 #include <sys/socket.h>
10 #include <arpa/inet.h>
19 /* apple's poll() does not work on char devs */
23 /* XXX should be from autoconf */
24 static const char *configfile
="/etc/secnet/secnet.conf";
25 static const char *sites_key
="sites";
26 bool_t just_check_config
=False
;
27 static char *userid
=NULL
;
30 bool_t background
=True
;
31 static char *pidfile
=NULL
;
32 bool_t require_root_privileges
=False
;
33 cstring_t require_root_privileges_explanation
=NULL
;
35 static pid_t secnet_pid
;
37 /* Structures dealing with poll() call */
38 struct poll_interest
{
39 beforepoll_fn
*before
;
45 LIST_ENTRY(poll_interest
) entry
;
47 static LIST_HEAD(, poll_interest
) reg
= LIST_HEAD_INITIALIZER(®
);
49 static bool_t finished
=False
;
51 /* Parse the command line options */
52 static void parse_options(int argc
, char **argv
)
58 static struct option long_options
[] = {
59 {"verbose", 0, 0, 'v'},
60 {"nowarnings", 0, 0, 'w'},
63 {"nodetach", 0, 0, 'n'},
64 {"managed", 0, 0, 'm'},
65 {"silent", 0, 0, 'f'},
68 {"config", 1, 0, 'c'},
69 {"just-check-config", 0, 0, 'j'},
70 {"sites-key", 1, 0, 's'},
74 c
=getopt_long(argc
, argv
, "vwdnjc:ft:s:m",
75 long_options
, &option_index
);
82 printf("Usage: secnet [OPTION]...\n\n"
83 " -f, --silent, --quiet suppress error messages\n"
84 " -w, --nowarnings suppress warnings\n"
85 " -v, --verbose output extra diagnostics\n"
86 " -c, --config=filename specify a configuration file\n"
87 " -j, --just-check-config stop after reading "
88 "configuration file\n"
89 " -s, --sites-key=name configuration key that "
90 "specifies active sites\n"
91 " -n, --nodetach do not run in background\n"
92 " -m, --managed running under a supervisor\n"
93 " -d, --debug output debug messages\n"
94 " --help display this help and exit\n"
95 " --version output version information "
103 printf("%s\n",version
);
108 message_level
|=M_INFO
|M_NOTICE
|M_WARNING
|M_ERR
|M_SECURITY
|
113 message_level
&=(~M_WARNING
);
117 message_level
|=M_DEBUG_CONFIG
|M_DEBUG_PHASE
|M_DEBUG
;
121 message_level
=M_FATAL
;
129 secnet_is_daemon
=True
;
134 configfile
=safe_strdup(optarg
,"config_filename");
136 fatal("secnet: no config filename specified");
140 just_check_config
=True
;
145 sites_key
=safe_strdup(optarg
,"sites-key");
147 fatal("secnet: no sites key specified");
155 Message(M_ERR
,"secnet: Unknown getopt code %c\n",c
);
159 if (argc
-optind
!= 0) {
160 Message(M_ERR
,"secnet: You gave extra command line parameters, "
161 "which were ignored.\n");
165 static void setup(dict_t
*config
)
174 l
=dict_lookup(config
,"system");
176 if (!l
|| list_elem(l
,0)->type
!=t_dict
) {
177 fatal("configuration does not include a \"system\" dictionary");
179 system
=list_elem(l
,0)->data
.dict
;
180 loc
=list_elem(l
,0)->loc
;
182 /* Arrange systemwide log facility */
183 l
=dict_lookup(system
,"log");
185 fatal("configuration does not include a system/log facility");
187 system_log
=init_log(l
);
189 /* Who are we supposed to run as? */
190 userid
=dict_read_string(system
,"userid",False
,"system",loc
);
192 if (!(pw
=getpwnam(userid
)))
193 fatal("userid \"%s\" not found",userid
);
199 pidfile
=dict_read_string(system
,"pidfile",False
,"system",loc
);
201 /* Check whether we need root privileges */
202 if (require_root_privileges
&& uid
!=0) {
203 fatal("the configured feature \"%s\" requires "
204 "that secnet retain root privileges while running.",
205 require_root_privileges_explanation
);
208 /* Go along site list, starting sites */
209 l
=dict_lookup(config
,sites_key
);
211 Message(M_WARNING
,"secnet: configuration key \"%s\" is missing; no "
212 "remote sites are defined\n",sites_key
);
215 while ((site
=list_elem(l
, i
++))) {
217 if (site
->type
!=t_closure
) {
218 cfgfatal(site
->loc
,"system","non-closure in site list");
220 if (site
->data
.closure
->type
!=CL_SITE
) {
221 cfgfatal(site
->loc
,"system","non-site closure in site list");
223 s
=site
->data
.closure
->interface
;
224 s
->control(s
->st
,True
);
229 void register_for_poll(void *st
, beforepoll_fn
*before
,
230 afterpoll_fn
*after
, int32_t max_nfds
, cstring_t desc
)
232 struct poll_interest
*i
;
234 i
=safe_malloc(sizeof(*i
),"register_for_poll");
238 i
->max_nfds
=max_nfds
;
241 LIST_INSERT_HEAD(®
, i
, entry
);
245 static void system_phase_hook(void *sst
, uint32_t newphase
)
247 if (newphase
==PHASE_SHUTDOWN
&& pidfile
) {
248 /* Try to unlink the pidfile; don't care if it fails */
254 static int fakepoll(struct pollfd
*fds
, int nfds
, int timeout
) {
255 fd_set infds
[1], outfds
[1];
256 int maxfd
= -1, i
, rc
;
257 struct timeval tvtimeout
;
260 for(i
= 0; i
< nfds
; ++i
) {
261 if(fds
[i
].events
& POLLIN
)
262 FD_SET(fds
[i
].fd
, infds
);
263 if(fds
[i
].events
& POLLOUT
)
264 FD_SET(fds
[i
].fd
, outfds
);
265 if(fds
[i
].fd
> maxfd
)
269 tvtimeout
.tv_sec
= timeout
/ 1000;
270 tvtimeout
.tv_usec
= 1000 * (timeout
% 1000);
272 rc
= select(maxfd
+ 1, infds
, outfds
, NULL
,
273 timeout
== -1 ? NULL
: &tvtimeout
);
275 for(i
= 0; i
< nfds
; ++i
) {
277 if(FD_ISSET(fds
[i
].fd
, infds
))
279 if(FD_ISSET(fds
[i
].fd
, outfds
))
281 fds
[i
].revents
= revents
;
288 struct timeval tv_now_global
;
291 static void run(void)
293 struct poll_interest
*i
;
294 int rv
, nfds
, remain
, idx
;
296 struct pollfd
*fds
=0;
297 int allocdfds
=0, shortfall
=0;
299 Message(M_NOTICE
,"%s [%d]: starting\n",version
,secnet_pid
);
302 if (gettimeofday(&tv_now_global
, NULL
)!=0) {
303 fatal_perror("main loop: gettimeofday");
305 now_global
=((uint64_t)tv_now_global
.tv_sec
*(uint64_t)1000)+
306 ((uint64_t)tv_now_global
.tv_usec
/(uint64_t)1000);
308 LIST_FOREACH(i
, ®
, entry
) {
310 for (check
=0; check
<i
->nfds
; check
++) {
311 if(fds
[idx
+check
].revents
& POLLNVAL
) {
312 fatal("run: poll (%s#%d) set POLLNVAL", i
->desc
, check
);
315 i
->after(i
->state
, fds
+idx
, i
->nfds
);
320 allocdfds
+= shortfall
;
321 fds
=safe_realloc_ary(fds
,sizeof(*fds
),allocdfds
, "run");
327 LIST_FOREACH(i
, ®
, entry
) {
329 rv
=i
->before(i
->state
, fds
+idx
, &nfds
, &timeout
);
332 fatal("run: beforepoll_fn (%s) returns %d",i
->desc
,rv
);
333 assert(nfds
< INT_MAX
/4 - shortfall
);
334 shortfall
+= nfds
-remain
;
339 fatal("run: beforepoll_fn (%s) set timeout to %d",
349 rv
=fakepoll(fds
, idx
, timeout
);
351 rv
=poll(fds
, idx
, timeout
);
355 fatal_perror("run: poll");
363 /* Surrender privileges, if necessary */
364 static void droppriv(void)
368 fatal_perror("can't set gid to %ld",(long)gid
);
369 if (initgroups(userid
, gid
) < 0)
370 fatal_perror("initgroups");
371 if (setuid(uid
)!=0) {
372 fatal_perror("can't set uid to \"%s\"",userid
);
374 assert(getuid() == uid
);
375 assert(geteuid() == uid
);
376 assert(getgid() == gid
);
377 assert(getegid() == gid
);
381 /* Become a daemon, if necessary */
382 static void become_daemon(void)
388 add_hook(PHASE_SHUTDOWN
,system_phase_hook
,NULL
);
390 /* We only want to become a daemon if we are not one
392 if (background
&& !secnet_is_daemon
) {
395 /* Parent process - just exit */
398 /* Child process - all done, just carry on */
399 secnet_is_daemon
=True
;
401 fatal_perror("setsid");
404 fatal_perror("cannot fork");
408 if (secnet_is_daemon
) {
409 /* stderr etc are redirected to the system/log facility */
410 pipe_cloexec(errfds
);
411 if (dup2(errfds
[1],0) < 0
412 || dup2(errfds
[1],1) < 0
413 || dup2(errfds
[1],2) < 0)
414 fatal_perror("can't dup2 pipe");
415 if (close(errfds
[1]) < 0)
416 fatal_perror("can't close redundant pipe endpoint");
417 log_from_fd(errfds
[0],"stderr",system_log
);
421 /* Now we can write the pidfile */
423 pf
=fopen(pidfile
,"w");
425 fatal_perror("cannot open pidfile \"%s\"",pidfile
);
427 if (fprintf(pf
,"%ld\n",(long)secnet_pid
) < 0
429 fatal_perror("cannot write to pidfile \"%s\"",pidfile
);
433 static signal_notify_fn finish
,ignore_hup
;
434 static void finish(void *st
, int signum
)
437 Message(M_NOTICE
,"%s [%d]: received %s\n",version
,secnet_pid
,(string_t
)st
);
439 static void ignore_hup(void *st
, int signum
)
441 Message(M_INFO
,"%s [%d]: received SIGHUP\n",version
,secnet_pid
);
445 int main(int argc
, char **argv
)
449 enter_phase(PHASE_GETOPTS
);
450 parse_options(argc
,argv
);
452 enter_phase(PHASE_READCONFIG
);
453 config
=read_conffile(configfile
);
455 enter_phase(PHASE_SETUP
);
458 if (just_check_config
) {
459 Message(M_INFO
,"configuration file check complete\n");
463 enter_phase(PHASE_DAEMONIZE
);
466 enter_phase(PHASE_GETRESOURCES
);
467 /* Appropriate phase hooks will have been run */
469 enter_phase(PHASE_DROPPRIV
);
472 start_signal_handling();
473 request_signal_notification(SIGTERM
,finish
,safe_strdup("SIGTERM","run"));
474 if (!background
) request_signal_notification(SIGINT
,finish
,
475 safe_strdup("SIGINT","run"));
476 request_signal_notification(SIGHUP
,ignore_hup
,NULL
);
477 enter_phase(PHASE_RUN
);
480 enter_phase(PHASE_SHUTDOWN
);
481 Message(M_NOTICE
,"%s [%d]: finished\n",version
,secnet_pid
);