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4f04a76b DL |
1 | /* |
2 | * libfrr overall management functions | |
3 | * | |
4 | * Copyright (C) 2016 David Lamparter for NetDEF, Inc. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the Free | |
8 | * Software Foundation; either version 2 of the License, or (at your option) | |
9 | * any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
14 | * more details. | |
15 | * | |
896014f4 DL |
16 | * You should have received a copy of the GNU General Public License along |
17 | * with this program; see the file COPYING; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
4f04a76b DL |
19 | */ |
20 | ||
21 | #include <zebra.h> | |
689f5a8c | 22 | #include <sys/un.h> |
4f04a76b | 23 | |
f43fbf83 DL |
24 | #include <sys/types.h> |
25 | #include <sys/wait.h> | |
26 | ||
4f04a76b DL |
27 | #include "libfrr.h" |
28 | #include "getopt.h" | |
beaa5470 | 29 | #include "privs.h" |
4f04a76b DL |
30 | #include "vty.h" |
31 | #include "command.h" | |
32 | #include "version.h" | |
857b5446 | 33 | #include "memory_vty.h" |
eb05883f | 34 | #include "zclient.h" |
cf7466ac | 35 | #include "log_int.h" |
30771d65 | 36 | #include "module.h" |
f43fbf83 | 37 | #include "network.h" |
b66d022e | 38 | #include "lib_errors.h" |
1c2facd1 RW |
39 | #include "db.h" |
40 | #include "northbound_cli.h" | |
1ae9686c | 41 | #include "northbound_db.h" |
eb05883f | 42 | |
d62a17ae | 43 | DEFINE_HOOK(frr_late_init, (struct thread_master * tm), (tm)) |
03951374 DL |
44 | DEFINE_KOOH(frr_early_fini, (), ()) |
45 | DEFINE_KOOH(frr_fini, (), ()) | |
a5b38c5b | 46 | |
eb05883f DL |
47 | const char frr_sysconfdir[] = SYSCONFDIR; |
48 | const char frr_vtydir[] = DAEMON_VTY_DIR; | |
1c2facd1 RW |
49 | #ifdef HAVE_SQLITE3 |
50 | const char frr_dbdir[] = DAEMON_DB_DIR; | |
51 | #endif | |
80b4df3b | 52 | const char frr_moduledir[] = MODULE_PATH; |
eb05883f | 53 | |
4f138a3e DL |
54 | char frr_protoname[256] = "NONE"; |
55 | char frr_protonameinst[256] = "NONE"; | |
b85120bc | 56 | |
ff44f570 | 57 | char config_default[512]; |
689f5a8c | 58 | char frr_zclientpath[256]; |
ff44f570 | 59 | static char pidfile_default[512]; |
1c2facd1 RW |
60 | #ifdef HAVE_SQLITE3 |
61 | static char dbfile_default[512]; | |
62 | #endif | |
eb05883f | 63 | static char vtypath_default[256]; |
4f04a76b | 64 | |
d8729f8c | 65 | bool debug_memstats_at_exit = false; |
0a7c7856 | 66 | static bool nodetach_term, nodetach_daemon; |
9eed278b | 67 | |
4f04a76b DL |
68 | static char comb_optstr[256]; |
69 | static struct option comb_lo[64]; | |
70 | static struct option *comb_next_lo = &comb_lo[0]; | |
71 | static char comb_helpstr[4096]; | |
72 | ||
73 | struct optspec { | |
74 | const char *optstr; | |
75 | const char *helpstr; | |
76 | const struct option *longopts; | |
77 | }; | |
78 | ||
79 | static void opt_extend(const struct optspec *os) | |
80 | { | |
81 | const struct option *lo; | |
82 | ||
83 | strcat(comb_optstr, os->optstr); | |
84 | strcat(comb_helpstr, os->helpstr); | |
85 | for (lo = os->longopts; lo->name; lo++) | |
86 | memcpy(comb_next_lo++, lo, sizeof(*lo)); | |
87 | } | |
88 | ||
89 | ||
80b4df3b MW |
90 | #define OPTION_VTYSOCK 1000 |
91 | #define OPTION_MODULEDIR 1002 | |
e9b4e74a DS |
92 | #define OPTION_LOG 1003 |
93 | #define OPTION_LOGLEVEL 1004 | |
1c2facd1 RW |
94 | #define OPTION_TCLI 1005 |
95 | #define OPTION_DB_FILE 1006 | |
4f04a76b DL |
96 | |
97 | static const struct option lo_always[] = { | |
d62a17ae | 98 | {"help", no_argument, NULL, 'h'}, |
99 | {"version", no_argument, NULL, 'v'}, | |
100 | {"daemon", no_argument, NULL, 'd'}, | |
101 | {"module", no_argument, NULL, 'M'}, | |
102 | {"vty_socket", required_argument, NULL, OPTION_VTYSOCK}, | |
103 | {"moduledir", required_argument, NULL, OPTION_MODULEDIR}, | |
f8507817 | 104 | {"log", required_argument, NULL, OPTION_LOG}, |
e9b4e74a | 105 | {"log-level", required_argument, NULL, OPTION_LOGLEVEL}, |
1c2facd1 | 106 | {"tcli", no_argument, NULL, OPTION_TCLI}, |
d62a17ae | 107 | {NULL}}; |
4f04a76b | 108 | static const struct optspec os_always = { |
30771d65 | 109 | "hvdM:", |
4f04a76b DL |
110 | " -h, --help Display this help and exit\n" |
111 | " -v, --version Print program version\n" | |
eb05883f | 112 | " -d, --daemon Runs in daemon mode\n" |
30771d65 | 113 | " -M, --module Load specified module\n" |
80b4df3b | 114 | " --vty_socket Override vty socket path\n" |
f8507817 | 115 | " --moduledir Override modules directory\n" |
e9b4e74a | 116 | " --log Set Logging to stdout, syslog, or file:<name>\n" |
1c2facd1 RW |
117 | " --log-level Set Logging Level to use, debug, info, warn, etc\n" |
118 | " --tcli Use transaction-based CLI\n", | |
d62a17ae | 119 | lo_always}; |
4f04a76b DL |
120 | |
121 | ||
eb05883f | 122 | static const struct option lo_cfg_pid_dry[] = { |
d62a17ae | 123 | {"pid_file", required_argument, NULL, 'i'}, |
124 | {"config_file", required_argument, NULL, 'f'}, | |
1c2facd1 RW |
125 | #ifdef HAVE_SQLITE3 |
126 | {"db_file", required_argument, NULL, OPTION_DB_FILE}, | |
127 | #endif | |
d1b4fc1f | 128 | {"pathspace", required_argument, NULL, 'N'}, |
d62a17ae | 129 | {"dryrun", no_argument, NULL, 'C'}, |
cff2b211 | 130 | {"terminal", no_argument, NULL, 't'}, |
d62a17ae | 131 | {NULL}}; |
eb05883f | 132 | static const struct optspec os_cfg_pid_dry = { |
d1b4fc1f | 133 | "f:i:CtN:", |
eb05883f DL |
134 | " -f, --config_file Set configuration file name\n" |
135 | " -i, --pid_file Set process identifier file name\n" | |
1c2facd1 RW |
136 | #ifdef HAVE_SQLITE3 |
137 | " --db_file Set database file name\n" | |
138 | #endif | |
d1b4fc1f | 139 | " -N, --pathspace Insert prefix into config & socket paths\n" |
cff2b211 DL |
140 | " -C, --dryrun Check configuration for validity and exit\n" |
141 | " -t, --terminal Open terminal session on stdio\n" | |
142 | " -d -t Daemonize after terminal session ends\n", | |
d62a17ae | 143 | lo_cfg_pid_dry}; |
eb05883f DL |
144 | |
145 | ||
146 | static const struct option lo_zclient[] = { | |
d62a17ae | 147 | {"socket", required_argument, NULL, 'z'}, |
148 | {NULL}}; | |
eb05883f | 149 | static const struct optspec os_zclient = { |
d62a17ae | 150 | "z:", " -z, --socket Set path of zebra socket\n", lo_zclient}; |
eb05883f DL |
151 | |
152 | ||
4f04a76b | 153 | static const struct option lo_vty[] = { |
d62a17ae | 154 | {"vty_addr", required_argument, NULL, 'A'}, |
155 | {"vty_port", required_argument, NULL, 'P'}, | |
156 | {NULL}}; | |
4f04a76b DL |
157 | static const struct optspec os_vty = { |
158 | "A:P:", | |
159 | " -A, --vty_addr Set vty's bind address\n" | |
160 | " -P, --vty_port Set vty's port number\n", | |
d62a17ae | 161 | lo_vty}; |
4f04a76b DL |
162 | |
163 | ||
d62a17ae | 164 | static const struct option lo_user[] = {{"user", required_argument, NULL, 'u'}, |
165 | {"group", required_argument, NULL, 'g'}, | |
166 | {NULL}}; | |
167 | static const struct optspec os_user = {"u:g:", | |
168 | " -u, --user User to run as\n" | |
169 | " -g, --group Group to run as\n", | |
170 | lo_user}; | |
4f04a76b DL |
171 | |
172 | ||
689f5a8c DL |
173 | bool frr_zclient_addr(struct sockaddr_storage *sa, socklen_t *sa_len, |
174 | const char *path) | |
175 | { | |
176 | memset(sa, 0, sizeof(*sa)); | |
177 | ||
178 | if (!path) | |
179 | path = ZEBRA_SERV_PATH; | |
180 | ||
181 | if (!strncmp(path, ZAPI_TCP_PATHNAME, strlen(ZAPI_TCP_PATHNAME))) { | |
5d13cd09 | 182 | /* note: this functionality is disabled at bottom */ |
689f5a8c DL |
183 | int af; |
184 | int port = ZEBRA_PORT; | |
185 | char *err = NULL; | |
186 | struct sockaddr_in *sin = NULL; | |
187 | struct sockaddr_in6 *sin6 = NULL; | |
188 | ||
189 | path += strlen(ZAPI_TCP_PATHNAME); | |
190 | ||
191 | switch (path[0]) { | |
192 | case '4': | |
193 | path++; | |
194 | af = AF_INET; | |
195 | break; | |
196 | case '6': | |
197 | path++; | |
996c9314 | 198 | /* fallthrough */ |
689f5a8c DL |
199 | default: |
200 | af = AF_INET6; | |
201 | break; | |
202 | } | |
203 | ||
204 | switch (path[0]) { | |
205 | case '\0': | |
206 | break; | |
207 | case ':': | |
208 | path++; | |
209 | port = strtoul(path, &err, 10); | |
210 | if (*err || !*path) | |
211 | return false; | |
212 | break; | |
213 | default: | |
214 | return false; | |
215 | } | |
216 | ||
217 | sa->ss_family = af; | |
218 | switch (af) { | |
219 | case AF_INET: | |
220 | sin = (struct sockaddr_in *)sa; | |
221 | sin->sin_port = htons(port); | |
222 | sin->sin_addr.s_addr = htonl(INADDR_LOOPBACK); | |
223 | *sa_len = sizeof(struct sockaddr_in); | |
224 | #ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN | |
225 | sin->sin_len = *sa_len; | |
226 | #endif | |
227 | break; | |
228 | case AF_INET6: | |
229 | sin6 = (struct sockaddr_in6 *)sa; | |
230 | sin6->sin6_port = htons(port); | |
231 | inet_pton(AF_INET6, "::1", &sin6->sin6_addr); | |
232 | *sa_len = sizeof(struct sockaddr_in6); | |
233 | #ifdef SIN6_LEN | |
234 | sin6->sin6_len = *sa_len; | |
235 | #endif | |
236 | break; | |
237 | } | |
5d13cd09 DL |
238 | |
239 | #if 1 | |
240 | /* force-disable this path, because tcp-zebra is a | |
241 | * SECURITY ISSUE. there are no checks at all against | |
242 | * untrusted users on the local system connecting on TCP | |
243 | * and injecting bogus routing data into the entire routing | |
244 | * domain. | |
245 | * | |
246 | * The functionality is only left here because it may be | |
247 | * useful during development, in order to be able to get | |
248 | * tcpdump or wireshark watching ZAPI as TCP. If you want | |
249 | * to do that, flip the #if 1 above to #if 0. */ | |
250 | memset(sa, 0, sizeof(*sa)); | |
251 | return false; | |
252 | #endif | |
689f5a8c DL |
253 | } else { |
254 | /* "sun" is a #define on solaris */ | |
255 | struct sockaddr_un *suna = (struct sockaddr_un *)sa; | |
256 | ||
257 | suna->sun_family = AF_UNIX; | |
258 | strlcpy(suna->sun_path, path, sizeof(suna->sun_path)); | |
259 | #ifdef HAVE_STRUCT_SOCKADDR_UN_SUN_LEN | |
260 | *sa_len = suna->sun_len = SUN_LEN(suna); | |
261 | #else | |
262 | *sa_len = sizeof(suna->sun_family) + strlen(suna->sun_path); | |
263 | #endif /* HAVE_STRUCT_SOCKADDR_UN_SUN_LEN */ | |
264 | #if 0 | |
265 | /* this is left here for future reference; Linux abstract | |
266 | * socket namespace support can be enabled by replacing | |
267 | * above #if 0 with #ifdef GNU_LINUX. | |
268 | * | |
269 | * THIS IS A SECURITY ISSUE, the abstract socket namespace | |
270 | * does not have user/group permission control on sockets. | |
271 | * we'd need to implement SCM_CREDENTIALS support first to | |
272 | * check that only proper users can connect to abstract | |
273 | * sockets. (same problem as tcp-zebra, except there is a | |
274 | * fix with SCM_CREDENTIALS. tcp-zebra has no such fix.) | |
275 | */ | |
276 | if (suna->sun_path[0] == '@') | |
277 | suna->sun_path[0] = '\0'; | |
278 | #endif | |
279 | } | |
280 | return true; | |
281 | } | |
282 | ||
4f04a76b DL |
283 | static struct frr_daemon_info *di = NULL; |
284 | ||
285 | void frr_preinit(struct frr_daemon_info *daemon, int argc, char **argv) | |
286 | { | |
287 | di = daemon; | |
288 | ||
289 | /* basename(), opencoded. */ | |
290 | char *p = strrchr(argv[0], '/'); | |
291 | di->progname = p ? p + 1 : argv[0]; | |
292 | ||
293 | umask(0027); | |
294 | ||
295 | opt_extend(&os_always); | |
eb05883f DL |
296 | if (!(di->flags & FRR_NO_CFG_PID_DRY)) |
297 | opt_extend(&os_cfg_pid_dry); | |
4f04a76b DL |
298 | if (!(di->flags & FRR_NO_PRIVSEP)) |
299 | opt_extend(&os_user); | |
eb05883f DL |
300 | if (!(di->flags & FRR_NO_ZCLIENT)) |
301 | opt_extend(&os_zclient); | |
4f04a76b DL |
302 | if (!(di->flags & FRR_NO_TCPVTY)) |
303 | opt_extend(&os_vty); | |
0a7c7856 DL |
304 | if (di->flags & FRR_DETACH_LATER) |
305 | nodetach_daemon = true; | |
eb05883f DL |
306 | |
307 | snprintf(config_default, sizeof(config_default), "%s/%s.conf", | |
d62a17ae | 308 | frr_sysconfdir, di->name); |
eb05883f | 309 | snprintf(pidfile_default, sizeof(pidfile_default), "%s/%s.pid", |
d62a17ae | 310 | frr_vtydir, di->name); |
1c2facd1 RW |
311 | #ifdef HAVE_SQLITE3 |
312 | snprintf(dbfile_default, sizeof(dbfile_default), "%s/%s.db", | |
313 | frr_dbdir, di->name); | |
314 | #endif | |
b85120bc DL |
315 | |
316 | strlcpy(frr_protoname, di->logname, sizeof(frr_protoname)); | |
317 | strlcpy(frr_protonameinst, di->logname, sizeof(frr_protonameinst)); | |
689f5a8c DL |
318 | |
319 | strlcpy(frr_zclientpath, ZEBRA_SERV_PATH, sizeof(frr_zclientpath)); | |
1c2facd1 RW |
320 | |
321 | di->cli_mode = FRR_CLI_CLASSIC; | |
4f04a76b DL |
322 | } |
323 | ||
324 | void frr_opt_add(const char *optstr, const struct option *longopts, | |
d62a17ae | 325 | const char *helpstr) |
4f04a76b | 326 | { |
d62a17ae | 327 | const struct optspec main_opts = {optstr, helpstr, longopts}; |
4f04a76b DL |
328 | opt_extend(&main_opts); |
329 | } | |
330 | ||
331 | void frr_help_exit(int status) | |
332 | { | |
333 | FILE *target = status ? stderr : stdout; | |
334 | ||
335 | if (status != 0) | |
336 | fprintf(stderr, "Invalid options.\n\n"); | |
337 | ||
338 | if (di->printhelp) | |
339 | di->printhelp(target); | |
340 | else | |
341 | fprintf(target, "Usage: %s [OPTION...]\n\n%s%s%s\n\n%s", | |
d62a17ae | 342 | di->progname, di->proghelp, di->copyright ? "\n\n" : "", |
343 | di->copyright ? di->copyright : "", comb_helpstr); | |
4f04a76b DL |
344 | fprintf(target, "\nReport bugs to %s\n", FRR_BUG_ADDRESS); |
345 | exit(status); | |
346 | } | |
347 | ||
30771d65 DL |
348 | struct option_chain { |
349 | struct option_chain *next; | |
350 | const char *arg; | |
351 | }; | |
80b4df3b | 352 | |
30771d65 | 353 | static struct option_chain *modules = NULL, **modnext = &modules; |
4f04a76b DL |
354 | static int errors = 0; |
355 | ||
356 | static int frr_opt(int opt) | |
357 | { | |
358 | static int vty_port_set = 0; | |
359 | static int vty_addr_set = 0; | |
30771d65 | 360 | struct option_chain *oc; |
4f04a76b DL |
361 | char *err; |
362 | ||
363 | switch (opt) { | |
364 | case 'h': | |
365 | frr_help_exit(0); | |
366 | break; | |
367 | case 'v': | |
368 | print_version(di->progname); | |
369 | exit(0); | |
370 | break; | |
eb05883f DL |
371 | case 'd': |
372 | di->daemon_mode = 1; | |
373 | break; | |
30771d65 DL |
374 | case 'M': |
375 | oc = XMALLOC(MTYPE_TMP, sizeof(*oc)); | |
376 | oc->arg = optarg; | |
377 | oc->next = NULL; | |
378 | *modnext = oc; | |
379 | modnext = &oc->next; | |
380 | break; | |
eb05883f DL |
381 | case 'i': |
382 | if (di->flags & FRR_NO_CFG_PID_DRY) | |
383 | return 1; | |
384 | di->pid_file = optarg; | |
385 | break; | |
386 | case 'f': | |
387 | if (di->flags & FRR_NO_CFG_PID_DRY) | |
388 | return 1; | |
389 | di->config_file = optarg; | |
390 | break; | |
d1b4fc1f DL |
391 | case 'N': |
392 | if (di->flags & FRR_NO_CFG_PID_DRY) | |
393 | return 1; | |
394 | if (di->pathspace) { | |
395 | fprintf(stderr, | |
396 | "-N/--pathspace option specified more than once!\n"); | |
397 | errors++; | |
398 | break; | |
399 | } | |
400 | if (strchr(optarg, '/') || strchr(optarg, '.')) { | |
401 | fprintf(stderr, | |
402 | "slashes or dots are not permitted in the --pathspace option.\n"); | |
403 | errors++; | |
404 | break; | |
405 | } | |
406 | di->pathspace = optarg; | |
407 | break; | |
1c2facd1 RW |
408 | #ifdef HAVE_SQLITE3 |
409 | case OPTION_DB_FILE: | |
410 | if (di->flags & FRR_NO_CFG_PID_DRY) | |
411 | return 1; | |
412 | di->db_file = optarg; | |
413 | break; | |
414 | #endif | |
eb05883f DL |
415 | case 'C': |
416 | if (di->flags & FRR_NO_CFG_PID_DRY) | |
417 | return 1; | |
418 | di->dryrun = 1; | |
419 | break; | |
cff2b211 DL |
420 | case 't': |
421 | if (di->flags & FRR_NO_CFG_PID_DRY) | |
422 | return 1; | |
423 | di->terminal = 1; | |
424 | break; | |
eb05883f DL |
425 | case 'z': |
426 | if (di->flags & FRR_NO_ZCLIENT) | |
427 | return 1; | |
689f5a8c | 428 | strlcpy(frr_zclientpath, optarg, sizeof(frr_zclientpath)); |
eb05883f | 429 | break; |
4f04a76b DL |
430 | case 'A': |
431 | if (di->flags & FRR_NO_TCPVTY) | |
432 | return 1; | |
433 | if (vty_addr_set) { | |
d62a17ae | 434 | fprintf(stderr, |
435 | "-A option specified more than once!\n"); | |
4f04a76b DL |
436 | errors++; |
437 | break; | |
438 | } | |
439 | vty_addr_set = 1; | |
440 | di->vty_addr = optarg; | |
441 | break; | |
442 | case 'P': | |
443 | if (di->flags & FRR_NO_TCPVTY) | |
444 | return 1; | |
445 | if (vty_port_set) { | |
d62a17ae | 446 | fprintf(stderr, |
447 | "-P option specified more than once!\n"); | |
4f04a76b DL |
448 | errors++; |
449 | break; | |
450 | } | |
451 | vty_port_set = 1; | |
452 | di->vty_port = strtoul(optarg, &err, 0); | |
453 | if (*err || !*optarg) { | |
d62a17ae | 454 | fprintf(stderr, |
455 | "invalid port number \"%s\" for -P option\n", | |
456 | optarg); | |
4f04a76b DL |
457 | errors++; |
458 | break; | |
459 | } | |
460 | break; | |
461 | case OPTION_VTYSOCK: | |
462 | if (di->vty_sock_path) { | |
d62a17ae | 463 | fprintf(stderr, |
464 | "--vty_socket option specified more than once!\n"); | |
4f04a76b DL |
465 | errors++; |
466 | break; | |
467 | } | |
468 | di->vty_sock_path = optarg; | |
469 | break; | |
80b4df3b MW |
470 | case OPTION_MODULEDIR: |
471 | if (di->module_path) { | |
d62a17ae | 472 | fprintf(stderr, |
473 | "----moduledir option specified more than once!\n"); | |
80b4df3b MW |
474 | errors++; |
475 | break; | |
476 | } | |
477 | di->module_path = optarg; | |
478 | break; | |
1c2facd1 RW |
479 | case OPTION_TCLI: |
480 | di->cli_mode = FRR_CLI_TRANSACTIONAL; | |
481 | break; | |
4f04a76b DL |
482 | case 'u': |
483 | if (di->flags & FRR_NO_PRIVSEP) | |
484 | return 1; | |
485 | di->privs->user = optarg; | |
486 | break; | |
487 | case 'g': | |
488 | if (di->flags & FRR_NO_PRIVSEP) | |
489 | return 1; | |
490 | di->privs->group = optarg; | |
491 | break; | |
f8507817 DS |
492 | case OPTION_LOG: |
493 | di->early_logging = optarg; | |
494 | break; | |
e9b4e74a DS |
495 | case OPTION_LOGLEVEL: |
496 | di->early_loglevel = optarg; | |
497 | break; | |
4f04a76b DL |
498 | default: |
499 | return 1; | |
500 | } | |
501 | return 0; | |
502 | } | |
503 | ||
d62a17ae | 504 | int frr_getopt(int argc, char *const argv[], int *longindex) |
4f04a76b DL |
505 | { |
506 | int opt; | |
507 | int lidx; | |
508 | ||
509 | comb_next_lo->name = NULL; | |
510 | ||
511 | do { | |
512 | opt = getopt_long(argc, argv, comb_optstr, comb_lo, &lidx); | |
513 | if (frr_opt(opt)) | |
514 | break; | |
515 | } while (opt != -1); | |
516 | ||
517 | if (opt == -1 && errors) | |
518 | frr_help_exit(1); | |
519 | if (longindex) | |
520 | *longindex = lidx; | |
521 | return opt; | |
522 | } | |
523 | ||
beaa5470 DL |
524 | static void frr_mkdir(const char *path, bool strip) |
525 | { | |
526 | char buf[256]; | |
527 | mode_t prev; | |
528 | int ret; | |
529 | struct zprivs_ids_t ids; | |
530 | ||
531 | if (strip) { | |
532 | char *slash = strrchr(path, '/'); | |
533 | size_t plen; | |
534 | if (!slash) | |
535 | return; | |
536 | plen = slash - path; | |
537 | if (plen > sizeof(buf) - 1) | |
538 | return; | |
539 | memcpy(buf, path, plen); | |
540 | buf[plen] = '\0'; | |
541 | path = buf; | |
542 | } | |
543 | ||
544 | /* o+rx (..5) is needed for the frrvty group to work properly; | |
545 | * without it, users in the frrvty group can't access the vty sockets. | |
546 | */ | |
547 | prev = umask(0022); | |
548 | ret = mkdir(path, 0755); | |
549 | umask(prev); | |
550 | ||
551 | if (ret != 0) { | |
552 | /* if EEXIST, return without touching the permissions, | |
553 | * so user-set custom permissions are left in place | |
554 | */ | |
555 | if (errno == EEXIST) | |
556 | return; | |
557 | ||
1c50c1c0 QY |
558 | flog_err(EC_LIB_SYSTEM_CALL, "failed to mkdir \"%s\": %s", path, |
559 | strerror(errno)); | |
beaa5470 DL |
560 | return; |
561 | } | |
562 | ||
563 | zprivs_get_ids(&ids); | |
564 | if (chown(path, ids.uid_normal, ids.gid_normal)) | |
1c50c1c0 QY |
565 | flog_err(EC_LIB_SYSTEM_CALL, "failed to chown \"%s\": %s", path, |
566 | strerror(errno)); | |
beaa5470 DL |
567 | } |
568 | ||
a5b38c5b | 569 | static struct thread_master *master; |
4f04a76b DL |
570 | struct thread_master *frr_init(void) |
571 | { | |
30771d65 DL |
572 | struct option_chain *oc; |
573 | struct frrmod_runtime *module; | |
574 | char moderr[256]; | |
d1b4fc1f | 575 | char p_instance[16] = "", p_pathspace[256] = ""; |
80b4df3b MW |
576 | const char *dir; |
577 | dir = di->module_path ? di->module_path : frr_moduledir; | |
4f04a76b DL |
578 | |
579 | srandom(time(NULL)); | |
580 | ||
d1b4fc1f | 581 | if (di->instance) { |
d62a17ae | 582 | snprintf(frr_protonameinst, sizeof(frr_protonameinst), "%s[%u]", |
583 | di->logname, di->instance); | |
d1b4fc1f DL |
584 | snprintf(p_instance, sizeof(p_instance), "-%d", di->instance); |
585 | } | |
586 | if (di->pathspace) | |
b39404c1 | 587 | snprintf(p_pathspace, sizeof(p_pathspace), "%s/", |
d1b4fc1f DL |
588 | di->pathspace); |
589 | ||
36077833 | 590 | snprintf(config_default, sizeof(config_default), "%s%s%s%s.conf", |
d1b4fc1f | 591 | frr_sysconfdir, p_pathspace, di->name, p_instance); |
b39404c1 | 592 | snprintf(pidfile_default, sizeof(pidfile_default), "%s/%s%s%s.pid", |
d1b4fc1f | 593 | frr_vtydir, p_pathspace, di->name, p_instance); |
1c2facd1 RW |
594 | #ifdef HAVE_SQLITE3 |
595 | snprintf(dbfile_default, sizeof(dbfile_default), "%s/%s%s%s.db", | |
596 | frr_dbdir, p_pathspace, di->name, p_instance); | |
597 | #endif | |
b85120bc | 598 | |
37a1f2fb DL |
599 | zprivs_preinit(di->privs); |
600 | ||
d62a17ae | 601 | openzlog(di->progname, di->logname, di->instance, |
602 | LOG_CONS | LOG_NDELAY | LOG_PID, LOG_DAEMON); | |
f8507817 | 603 | |
e9b4e74a | 604 | command_setup_early_logging(di->early_logging, di->early_loglevel); |
4f04a76b | 605 | |
689f5a8c DL |
606 | if (!frr_zclient_addr(&zclient_addr, &zclient_addr_len, |
607 | frr_zclientpath)) { | |
608 | fprintf(stderr, "Invalid zserv socket path: %s\n", | |
609 | frr_zclientpath); | |
610 | exit(1); | |
611 | } | |
612 | ||
b8c1fde3 DL |
613 | /* don't mkdir these as root... */ |
614 | if (!(di->flags & FRR_NO_PRIVSEP)) { | |
615 | if (!di->pid_file || !di->vty_path) | |
616 | frr_mkdir(frr_vtydir, false); | |
617 | if (di->pid_file) | |
618 | frr_mkdir(di->pid_file, true); | |
619 | if (di->vty_path) | |
620 | frr_mkdir(di->vty_path, true); | |
621 | } | |
beaa5470 | 622 | |
30771d65 DL |
623 | frrmod_init(di->module); |
624 | while (modules) { | |
625 | modules = (oc = modules)->next; | |
80b4df3b | 626 | module = frrmod_load(oc->arg, dir, moderr, sizeof(moderr)); |
30771d65 DL |
627 | if (!module) { |
628 | fprintf(stderr, "%s\n", moderr); | |
629 | exit(1); | |
630 | } | |
631 | XFREE(MTYPE_TMP, oc); | |
632 | } | |
633 | ||
4f04a76b DL |
634 | zprivs_init(di->privs); |
635 | ||
972a411c | 636 | master = thread_master_create(NULL); |
4f04a76b DL |
637 | signal_init(master, di->n_signals, di->signals); |
638 | ||
1c2facd1 RW |
639 | #ifdef HAVE_SQLITE3 |
640 | if (!di->db_file) | |
641 | di->db_file = dbfile_default; | |
642 | db_init(di->db_file); | |
643 | #endif | |
644 | ||
857b5446 DL |
645 | if (di->flags & FRR_LIMITED_CLI) |
646 | cmd_init(-1); | |
647 | else | |
648 | cmd_init(1); | |
1c2facd1 | 649 | |
857b5446 DL |
650 | vty_init(master); |
651 | memory_init(); | |
652 | ||
85cd2f9f | 653 | log_ref_init(); |
b66d022e DS |
654 | lib_error_init(); |
655 | ||
1c2facd1 | 656 | yang_init(); |
fbdc1c0a | 657 | nb_init(master, di->yang_modules, di->n_yang_modules); |
1ae9686c RW |
658 | if (nb_db_init() != NB_OK) |
659 | flog_warn(EC_LIB_NB_DATABASE, | |
660 | "%s: failed to initialize northbound database", | |
661 | __func__); | |
1c2facd1 | 662 | |
4f04a76b DL |
663 | return master; |
664 | } | |
665 | ||
1c2facd1 RW |
666 | const char *frr_get_progname(void) |
667 | { | |
668 | return di ? di->progname : NULL; | |
669 | } | |
670 | ||
671 | enum frr_cli_mode frr_get_cli_mode(void) | |
672 | { | |
673 | return di ? di->cli_mode : FRR_CLI_CLASSIC; | |
674 | } | |
675 | ||
154b9e8f DL |
676 | static int rcvd_signal = 0; |
677 | ||
678 | static void rcv_signal(int signum) | |
679 | { | |
680 | rcvd_signal = signum; | |
681 | /* poll() is interrupted by the signal; handled below */ | |
682 | } | |
683 | ||
f43fbf83 DL |
684 | static void frr_daemon_wait(int fd) |
685 | { | |
686 | struct pollfd pfd[1]; | |
687 | int ret; | |
688 | pid_t exitpid; | |
689 | int exitstat; | |
154b9e8f DL |
690 | sigset_t sigs, prevsigs; |
691 | ||
692 | sigemptyset(&sigs); | |
693 | sigaddset(&sigs, SIGTSTP); | |
694 | sigaddset(&sigs, SIGQUIT); | |
695 | sigaddset(&sigs, SIGINT); | |
696 | sigprocmask(SIG_BLOCK, &sigs, &prevsigs); | |
697 | ||
698 | struct sigaction sa = { | |
699 | .sa_handler = rcv_signal, .sa_flags = SA_RESETHAND, | |
700 | }; | |
701 | sigemptyset(&sa.sa_mask); | |
702 | sigaction(SIGTSTP, &sa, NULL); | |
703 | sigaction(SIGQUIT, &sa, NULL); | |
704 | sigaction(SIGINT, &sa, NULL); | |
f43fbf83 DL |
705 | |
706 | do { | |
154b9e8f DL |
707 | char buf[1]; |
708 | ssize_t nrecv; | |
709 | ||
f43fbf83 DL |
710 | pfd[0].fd = fd; |
711 | pfd[0].events = POLLIN; | |
712 | ||
154b9e8f DL |
713 | rcvd_signal = 0; |
714 | ||
996c9314 | 715 | #if defined(HAVE_PPOLL) |
154b9e8f DL |
716 | ret = ppoll(pfd, 1, NULL, &prevsigs); |
717 | #elif defined(HAVE_POLLTS) | |
718 | ret = pollts(pfd, 1, NULL, &prevsigs); | |
719 | #else | |
720 | /* racy -- only used on FreeBSD 9 */ | |
721 | sigset_t tmpsigs; | |
722 | sigprocmask(SIG_SETMASK, &prevsigs, &tmpsigs); | |
f43fbf83 | 723 | ret = poll(pfd, 1, -1); |
154b9e8f DL |
724 | sigprocmask(SIG_SETMASK, &tmpsigs, NULL); |
725 | #endif | |
f43fbf83 DL |
726 | if (ret < 0 && errno != EINTR && errno != EAGAIN) { |
727 | perror("poll()"); | |
728 | exit(1); | |
729 | } | |
154b9e8f DL |
730 | switch (rcvd_signal) { |
731 | case SIGTSTP: | |
732 | send(fd, "S", 1, 0); | |
733 | do { | |
734 | nrecv = recv(fd, buf, sizeof(buf), 0); | |
735 | } while (nrecv == -1 | |
736 | && (errno == EINTR || errno == EAGAIN)); | |
737 | ||
738 | raise(SIGTSTP); | |
739 | sigaction(SIGTSTP, &sa, NULL); | |
740 | send(fd, "R", 1, 0); | |
741 | break; | |
742 | case SIGINT: | |
743 | send(fd, "I", 1, 0); | |
744 | break; | |
745 | case SIGQUIT: | |
746 | send(fd, "Q", 1, 0); | |
747 | break; | |
748 | } | |
f43fbf83 DL |
749 | } while (ret <= 0); |
750 | ||
751 | exitpid = waitpid(-1, &exitstat, WNOHANG); | |
752 | if (exitpid == 0) | |
753 | /* child successfully went to main loop & closed socket */ | |
754 | exit(0); | |
755 | ||
756 | /* child failed one way or another ... */ | |
6bd2b360 DL |
757 | if (WIFEXITED(exitstat) && WEXITSTATUS(exitstat) == 0) |
758 | /* can happen in --terminal case if exit is fast enough */ | |
759 | (void)0; | |
760 | else if (WIFEXITED(exitstat)) | |
f43fbf83 DL |
761 | fprintf(stderr, "%s failed to start, exited %d\n", di->name, |
762 | WEXITSTATUS(exitstat)); | |
763 | else if (WIFSIGNALED(exitstat)) | |
764 | fprintf(stderr, "%s crashed in startup, signal %d\n", di->name, | |
765 | WTERMSIG(exitstat)); | |
766 | else | |
767 | fprintf(stderr, "%s failed to start, unknown problem\n", | |
768 | di->name); | |
769 | exit(1); | |
770 | } | |
771 | ||
772 | static int daemon_ctl_sock = -1; | |
773 | ||
774 | static void frr_daemonize(void) | |
775 | { | |
776 | int fds[2]; | |
777 | pid_t pid; | |
778 | ||
779 | if (socketpair(AF_UNIX, SOCK_STREAM, 0, fds)) { | |
780 | perror("socketpair() for daemon control"); | |
781 | exit(1); | |
782 | } | |
783 | set_cloexec(fds[0]); | |
784 | set_cloexec(fds[1]); | |
785 | ||
786 | pid = fork(); | |
787 | if (pid < 0) { | |
788 | perror("fork()"); | |
789 | exit(1); | |
790 | } | |
791 | if (pid == 0) { | |
792 | /* child */ | |
793 | close(fds[0]); | |
794 | if (setsid() < 0) { | |
795 | perror("setsid()"); | |
796 | exit(1); | |
797 | } | |
798 | ||
799 | daemon_ctl_sock = fds[1]; | |
800 | return; | |
801 | } | |
802 | ||
803 | close(fds[1]); | |
804 | frr_daemon_wait(fds[0]); | |
805 | } | |
806 | ||
9e224e60 DS |
807 | /* |
808 | * Why is this a thread? | |
809 | * | |
810 | * The read in of config for integrated config happens *after* | |
811 | * thread execution starts( because it is passed in via a vtysh -b -n ) | |
812 | * While if you are not using integrated config we want the ability | |
813 | * to read the config in after thread execution starts, so that | |
814 | * we can match this behavior. | |
815 | */ | |
816 | static int frr_config_read_in(struct thread *t) | |
4f04a76b | 817 | { |
1c2facd1 | 818 | if (!vty_read_config(NULL, di->config_file, config_default) && |
573de11f | 819 | di->backup_config_file) { |
fe64533a DS |
820 | char *orig = XSTRDUP(MTYPE_TMP, host_config_get()); |
821 | ||
573de11f DS |
822 | zlog_info("Attempting to read backup config file: %s specified", |
823 | di->backup_config_file); | |
1c2facd1 | 824 | vty_read_config(NULL, di->backup_config_file, config_default); |
fe64533a DS |
825 | |
826 | host_config_set(orig); | |
827 | XFREE(MTYPE_TMP, orig); | |
573de11f | 828 | } |
1c2facd1 RW |
829 | |
830 | /* | |
831 | * Update the shared candidate after reading the startup configuration. | |
832 | */ | |
833 | nb_config_replace(vty_shared_candidate_config, running_config, true); | |
834 | ||
9e224e60 DS |
835 | return 0; |
836 | } | |
837 | ||
838 | void frr_config_fork(void) | |
839 | { | |
840 | hook_call(frr_late_init, master); | |
eb05883f | 841 | |
0a7c7856 DL |
842 | if (!(di->flags & FRR_NO_CFG_PID_DRY)) { |
843 | /* Don't start execution if we are in dry-run mode */ | |
844 | if (di->dryrun) { | |
845 | frr_config_read_in(NULL); | |
846 | exit(0); | |
847 | } | |
9e224e60 | 848 | |
0a7c7856 DL |
849 | thread_add_event(master, frr_config_read_in, NULL, 0, |
850 | &di->read_in); | |
851 | } | |
eb05883f | 852 | |
154b9e8f | 853 | if (di->daemon_mode || di->terminal) |
f43fbf83 | 854 | frr_daemonize(); |
eb05883f DL |
855 | |
856 | if (!di->pid_file) | |
857 | di->pid_file = pidfile_default; | |
d62a17ae | 858 | pid_output(di->pid_file); |
eb05883f DL |
859 | } |
860 | ||
0a7c7856 | 861 | static void frr_vty_serv(void) |
eb05883f | 862 | { |
d62a17ae | 863 | /* allow explicit override of vty_path in the future |
eb05883f DL |
864 | * (not currently set anywhere) */ |
865 | if (!di->vty_path) { | |
866 | const char *dir; | |
d1b4fc1f DL |
867 | char defvtydir[256]; |
868 | ||
869 | snprintf(defvtydir, sizeof(defvtydir), "%s%s%s", frr_vtydir, | |
870 | di->pathspace ? "/" : "", | |
871 | di->pathspace ? di->pathspace : ""); | |
872 | ||
873 | dir = di->vty_sock_path ? di->vty_sock_path : defvtydir; | |
eb05883f DL |
874 | |
875 | if (di->instance) | |
876 | snprintf(vtypath_default, sizeof(vtypath_default), | |
d62a17ae | 877 | "%s/%s-%d.vty", dir, di->name, di->instance); |
eb05883f DL |
878 | else |
879 | snprintf(vtypath_default, sizeof(vtypath_default), | |
d62a17ae | 880 | "%s/%s.vty", dir, di->name); |
eb05883f DL |
881 | |
882 | di->vty_path = vtypath_default; | |
883 | } | |
884 | ||
885 | vty_serv_sock(di->vty_addr, di->vty_port, di->vty_path); | |
4f04a76b DL |
886 | } |
887 | ||
0a7c7856 DL |
888 | static void frr_check_detach(void) |
889 | { | |
890 | if (nodetach_term || nodetach_daemon) | |
891 | return; | |
892 | ||
893 | if (daemon_ctl_sock != -1) | |
894 | close(daemon_ctl_sock); | |
895 | daemon_ctl_sock = -1; | |
896 | } | |
897 | ||
154b9e8f | 898 | static void frr_terminal_close(int isexit) |
cff2b211 | 899 | { |
993bab89 RW |
900 | int nullfd; |
901 | ||
0a7c7856 DL |
902 | nodetach_term = false; |
903 | frr_check_detach(); | |
154b9e8f DL |
904 | |
905 | if (!di->daemon_mode || isexit) { | |
cff2b211 | 906 | printf("\n%s exiting\n", di->name); |
154b9e8f DL |
907 | if (!isexit) |
908 | raise(SIGINT); | |
909 | return; | |
cff2b211 DL |
910 | } else { |
911 | printf("\n%s daemonizing\n", di->name); | |
912 | fflush(stdout); | |
913 | } | |
914 | ||
993bab89 RW |
915 | nullfd = open("/dev/null", O_RDONLY | O_NOCTTY); |
916 | if (nullfd == -1) { | |
450971aa | 917 | flog_err_sys(EC_LIB_SYSTEM_CALL, |
09c866e3 QY |
918 | "%s: failed to open /dev/null: %s", __func__, |
919 | safe_strerror(errno)); | |
993bab89 RW |
920 | } else { |
921 | dup2(nullfd, 0); | |
922 | dup2(nullfd, 1); | |
923 | dup2(nullfd, 2); | |
924 | close(nullfd); | |
925 | } | |
154b9e8f | 926 | } |
cff2b211 | 927 | |
154b9e8f DL |
928 | static struct thread *daemon_ctl_thread = NULL; |
929 | ||
930 | static int frr_daemon_ctl(struct thread *t) | |
931 | { | |
932 | char buf[1]; | |
933 | ssize_t nr; | |
934 | ||
935 | nr = recv(daemon_ctl_sock, buf, sizeof(buf), 0); | |
936 | if (nr < 0 && (errno == EINTR || errno == EAGAIN)) | |
937 | goto out; | |
938 | if (nr <= 0) | |
939 | return 0; | |
940 | ||
941 | switch (buf[0]) { | |
996c9314 | 942 | case 'S': /* SIGTSTP */ |
154b9e8f | 943 | vty_stdio_suspend(); |
e339d7c0 | 944 | if (send(daemon_ctl_sock, "s", 1, 0) < 0) |
945 | zlog_err("%s send(\"s\") error (SIGTSTP propagation)", | |
946 | (di && di->name ? di->name : "")); | |
154b9e8f | 947 | break; |
996c9314 | 948 | case 'R': /* SIGTCNT [implicit] */ |
154b9e8f DL |
949 | vty_stdio_resume(); |
950 | break; | |
996c9314 | 951 | case 'I': /* SIGINT */ |
154b9e8f DL |
952 | di->daemon_mode = false; |
953 | raise(SIGINT); | |
954 | break; | |
996c9314 | 955 | case 'Q': /* SIGQUIT */ |
154b9e8f DL |
956 | di->daemon_mode = true; |
957 | vty_stdio_close(); | |
958 | break; | |
cff2b211 | 959 | } |
154b9e8f DL |
960 | |
961 | out: | |
962 | thread_add_read(master, frr_daemon_ctl, NULL, daemon_ctl_sock, | |
963 | &daemon_ctl_thread); | |
964 | return 0; | |
cff2b211 DL |
965 | } |
966 | ||
0a7c7856 DL |
967 | void frr_detach(void) |
968 | { | |
969 | nodetach_daemon = false; | |
970 | frr_check_detach(); | |
971 | } | |
972 | ||
16077f2f DL |
973 | void frr_run(struct thread_master *master) |
974 | { | |
975 | char instanceinfo[64] = ""; | |
976 | ||
977 | frr_vty_serv(); | |
978 | ||
979 | if (di->instance) | |
980 | snprintf(instanceinfo, sizeof(instanceinfo), "instance %u ", | |
d62a17ae | 981 | di->instance); |
982 | ||
983 | zlog_notice("%s %s starting: %svty@%d%s", di->name, FRR_VERSION, | |
984 | instanceinfo, di->vty_port, di->startinfo); | |
16077f2f | 985 | |
cff2b211 | 986 | if (di->terminal) { |
0a7c7856 DL |
987 | nodetach_term = true; |
988 | ||
cff2b211 | 989 | vty_stdio(frr_terminal_close); |
154b9e8f DL |
990 | if (daemon_ctl_sock != -1) { |
991 | set_nonblocking(daemon_ctl_sock); | |
992 | thread_add_read(master, frr_daemon_ctl, NULL, | |
993 | daemon_ctl_sock, &daemon_ctl_thread); | |
994 | } | |
eef3d030 | 995 | } else if (di->daemon_mode) { |
c9c8d0d1 | 996 | int nullfd = open("/dev/null", O_RDONLY | O_NOCTTY); |
993bab89 | 997 | if (nullfd == -1) { |
450971aa | 998 | flog_err_sys(EC_LIB_SYSTEM_CALL, |
09c866e3 QY |
999 | "%s: failed to open /dev/null: %s", |
1000 | __func__, safe_strerror(errno)); | |
993bab89 RW |
1001 | } else { |
1002 | dup2(nullfd, 0); | |
1003 | dup2(nullfd, 1); | |
1004 | dup2(nullfd, 2); | |
1005 | close(nullfd); | |
1006 | } | |
c9c8d0d1 | 1007 | |
0a7c7856 | 1008 | frr_check_detach(); |
f43fbf83 DL |
1009 | } |
1010 | ||
d34cb7f0 DL |
1011 | /* end fixed stderr startup logging */ |
1012 | zlog_startup_stderr = false; | |
1013 | ||
16077f2f DL |
1014 | struct thread thread; |
1015 | while (thread_fetch(master, &thread)) | |
1016 | thread_call(&thread); | |
1017 | } | |
03951374 DL |
1018 | |
1019 | void frr_early_fini(void) | |
1020 | { | |
1021 | hook_call(frr_early_fini); | |
1022 | } | |
1023 | ||
1024 | void frr_fini(void) | |
1025 | { | |
9eed278b DL |
1026 | FILE *fp; |
1027 | char filename[128]; | |
1028 | int have_leftovers; | |
1029 | ||
03951374 DL |
1030 | hook_call(frr_fini); |
1031 | ||
1032 | /* memory_init -> nothing needed */ | |
1033 | vty_terminate(); | |
1034 | cmd_terminate(); | |
1c2facd1 RW |
1035 | nb_terminate(); |
1036 | yang_terminate(); | |
1037 | #ifdef HAVE_SQLITE3 | |
1038 | db_close(); | |
1039 | #endif | |
85cd2f9f | 1040 | log_ref_fini(); |
03951374 DL |
1041 | zprivs_terminate(di->privs); |
1042 | /* signal_init -> nothing needed */ | |
1043 | thread_master_free(master); | |
e5716b16 | 1044 | master = NULL; |
03951374 DL |
1045 | closezlog(); |
1046 | /* frrmod_init -> nothing needed / hooks */ | |
9eed278b DL |
1047 | |
1048 | if (!debug_memstats_at_exit) | |
1049 | return; | |
1050 | ||
1051 | have_leftovers = log_memstats(stderr, di->name); | |
1052 | ||
1053 | /* in case we decide at runtime that we want exit-memstats for | |
1054 | * a daemon, but it has no stderr because it's daemonized | |
1055 | * (only do this if we actually have something to print though) | |
1056 | */ | |
1057 | if (!have_leftovers) | |
1058 | return; | |
1059 | ||
996c9314 LB |
1060 | snprintf(filename, sizeof(filename), "/tmp/frr-memstats-%s-%llu-%llu", |
1061 | di->name, (unsigned long long)getpid(), | |
9eed278b DL |
1062 | (unsigned long long)time(NULL)); |
1063 | ||
1064 | fp = fopen(filename, "w"); | |
1065 | if (fp) { | |
1066 | log_memstats(fp, di->name); | |
1067 | fclose(fp); | |
1068 | } | |
03951374 | 1069 | } |
42efb0d4 DL |
1070 | |
1071 | #ifdef INTERP | |
1072 | static const char interp[] | |
1073 | __attribute__((section(".interp"), used)) = INTERP; | |
1074 | #endif | |
1075 | /* | |
1076 | * executable entry point for libfrr.so | |
1077 | * | |
1078 | * note that libc initialization is skipped for this so the set of functions | |
1079 | * that can be called is rather limited | |
1080 | */ | |
1081 | extern void _libfrr_version(void) | |
1082 | __attribute__((visibility("hidden"), noreturn)); | |
1083 | void _libfrr_version(void) | |
1084 | { | |
1085 | const char banner[] = | |
1086 | FRR_FULL_NAME " " FRR_VERSION ".\n" | |
1087 | FRR_COPYRIGHT GIT_INFO "\n" | |
1088 | "configured with:\n " FRR_CONFIG_ARGS "\n"; | |
1089 | write(1, banner, sizeof(banner) - 1); | |
1090 | _exit(0); | |
1091 | } |