1 /* (c) 2007,2008 Andrei Nigmatulin */
2
3 #include "fpm_config.h"
4
5 #include <string.h>
6 #include <sys/time.h>
7 #include <sys/resource.h>
8 #include <stdlib.h>
9 #include <unistd.h>
10 #include <sys/types.h>
11 #include <pwd.h>
12 #include <grp.h>
13
14 #ifdef HAVE_PRCTL
15 #include <sys/prctl.h>
16 #endif
17
18 #ifdef HAVE_APPARMOR
19 #include <sys/apparmor.h>
20 #endif
21
22 #ifdef HAVE_SYS_ACL_H
23 #include <sys/acl.h>
24 #endif
25
26 #include "fpm.h"
27 #include "fpm_conf.h"
28 #include "fpm_cleanup.h"
29 #include "fpm_clock.h"
30 #include "fpm_stdio.h"
31 #include "fpm_unix.h"
32 #include "fpm_signals.h"
33 #include "zlog.h"
34
35 size_t fpm_pagesize;
36
fpm_unix_resolve_socket_premissions(struct fpm_worker_pool_s * wp)37 int fpm_unix_resolve_socket_premissions(struct fpm_worker_pool_s *wp) /* {{{ */
38 {
39 struct fpm_worker_pool_config_s *c = wp->config;
40 #ifdef HAVE_FPM_ACL
41 int n;
42
43 /* uninitialized */
44 wp->socket_acl = NULL;
45 #endif
46 wp->socket_uid = -1;
47 wp->socket_gid = -1;
48 wp->socket_mode = 0660;
49
50 if (!c) {
51 return 0;
52 }
53
54 if (c->listen_mode && *c->listen_mode) {
55 wp->socket_mode = strtoul(c->listen_mode, 0, 8);
56 }
57
58 #ifdef HAVE_FPM_ACL
59 /* count the users and groups configured */
60 n = 0;
61 if (c->listen_acl_users && *c->listen_acl_users) {
62 char *p;
63 n++;
64 for (p=strchr(c->listen_acl_users, ',') ; p ; p=strchr(p+1, ',')) {
65 n++;
66 }
67 }
68 if (c->listen_acl_groups && *c->listen_acl_groups) {
69 char *p;
70 n++;
71 for (p=strchr(c->listen_acl_groups, ',') ; p ; p=strchr(p+1, ',')) {
72 n++;
73 }
74 }
75 /* if ACL configured */
76 if (n) {
77 acl_t acl;
78 acl_entry_t entry;
79 acl_permset_t perm;
80 char *tmp, *p, *end;
81
82 acl = acl_init(n);
83 if (!acl) {
84 zlog(ZLOG_SYSERROR, "[pool %s] cannot allocate ACL", wp->config->name);
85 return -1;
86 }
87 /* Create USER ACL */
88 if (c->listen_acl_users && *c->listen_acl_users) {
89 struct passwd *pwd;
90
91 tmp = estrdup(c->listen_acl_users);
92 for (p=tmp ; p ; p=end) {
93 if ((end = strchr(p, ','))) {
94 *end++ = 0;
95 }
96 pwd = getpwnam(p);
97 if (pwd) {
98 zlog(ZLOG_DEBUG, "[pool %s] user '%s' have uid=%d", wp->config->name, p, pwd->pw_uid);
99 } else {
100 zlog(ZLOG_SYSERROR, "[pool %s] cannot get uid for user '%s'", wp->config->name, p);
101 acl_free(acl);
102 efree(tmp);
103 return -1;
104 }
105 if (0 > acl_create_entry(&acl, &entry) ||
106 0 > acl_set_tag_type(entry, ACL_USER) ||
107 0 > acl_set_qualifier(entry, &pwd->pw_uid) ||
108 0 > acl_get_permset(entry, &perm) ||
109 0 > acl_clear_perms (perm) ||
110 0 > acl_add_perm (perm, ACL_READ) ||
111 0 > acl_add_perm (perm, ACL_WRITE)) {
112 zlog(ZLOG_SYSERROR, "[pool %s] cannot create ACL for user '%s'", wp->config->name, p);
113 acl_free(acl);
114 efree(tmp);
115 return -1;
116 }
117 }
118 efree(tmp);
119 }
120 /* Create GROUP ACL */
121 if (c->listen_acl_groups && *c->listen_acl_groups) {
122 struct group *grp;
123
124 tmp = estrdup(c->listen_acl_groups);
125 for (p=tmp ; p ; p=end) {
126 if ((end = strchr(p, ','))) {
127 *end++ = 0;
128 }
129 grp = getgrnam(p);
130 if (grp) {
131 zlog(ZLOG_DEBUG, "[pool %s] group '%s' have gid=%d", wp->config->name, p, grp->gr_gid);
132 } else {
133 zlog(ZLOG_SYSERROR, "[pool %s] cannot get gid for group '%s'", wp->config->name, p);
134 acl_free(acl);
135 efree(tmp);
136 return -1;
137 }
138 if (0 > acl_create_entry(&acl, &entry) ||
139 0 > acl_set_tag_type(entry, ACL_GROUP) ||
140 0 > acl_set_qualifier(entry, &grp->gr_gid) ||
141 0 > acl_get_permset(entry, &perm) ||
142 0 > acl_clear_perms (perm) ||
143 0 > acl_add_perm (perm, ACL_READ) ||
144 0 > acl_add_perm (perm, ACL_WRITE)) {
145 zlog(ZLOG_SYSERROR, "[pool %s] cannot create ACL for group '%s'", wp->config->name, p);
146 acl_free(acl);
147 efree(tmp);
148 return -1;
149 }
150 }
151 efree(tmp);
152 }
153 if (c->listen_owner && *c->listen_owner) {
154 zlog(ZLOG_WARNING, "[pool %s] ACL set, listen.owner = '%s' is ignored", wp->config->name, c->listen_owner);
155 }
156 if (c->listen_group && *c->listen_group) {
157 zlog(ZLOG_WARNING, "[pool %s] ACL set, listen.group = '%s' is ignored", wp->config->name, c->listen_group);
158 }
159 wp->socket_acl = acl;
160 return 0;
161 }
162 /* When listen.users and listen.groups not configured, continue with standard right */
163 #endif
164
165 if (c->listen_owner && *c->listen_owner) {
166 struct passwd *pwd;
167
168 pwd = getpwnam(c->listen_owner);
169 if (!pwd) {
170 zlog(ZLOG_SYSERROR, "[pool %s] cannot get uid for user '%s'", wp->config->name, c->listen_owner);
171 return -1;
172 }
173
174 wp->socket_uid = pwd->pw_uid;
175 wp->socket_gid = pwd->pw_gid;
176 }
177
178 if (c->listen_group && *c->listen_group) {
179 struct group *grp;
180
181 grp = getgrnam(c->listen_group);
182 if (!grp) {
183 zlog(ZLOG_SYSERROR, "[pool %s] cannot get gid for group '%s'", wp->config->name, c->listen_group);
184 return -1;
185 }
186 wp->socket_gid = grp->gr_gid;
187 }
188
189 return 0;
190 }
191 /* }}} */
192
fpm_unix_set_socket_premissions(struct fpm_worker_pool_s * wp,const char * path)193 int fpm_unix_set_socket_premissions(struct fpm_worker_pool_s *wp, const char *path) /* {{{ */
194 {
195 #ifdef HAVE_FPM_ACL
196 if (wp->socket_acl) {
197 acl_t aclfile, aclconf;
198 acl_entry_t entryfile, entryconf;
199 int i;
200
201 /* Read the socket ACL */
202 aclconf = wp->socket_acl;
203 aclfile = acl_get_file (path, ACL_TYPE_ACCESS);
204 if (!aclfile) {
205 zlog(ZLOG_SYSERROR, "[pool %s] failed to read the ACL of the socket '%s'", wp->config->name, path);
206 return -1;
207 }
208 /* Copy the new ACL entry from config */
209 for (i=ACL_FIRST_ENTRY ; acl_get_entry(aclconf, i, &entryconf) ; i=ACL_NEXT_ENTRY) {
210 if (0 > acl_create_entry (&aclfile, &entryfile) ||
211 0 > acl_copy_entry(entryfile, entryconf)) {
212 zlog(ZLOG_SYSERROR, "[pool %s] failed to add entry to the ACL of the socket '%s'", wp->config->name, path);
213 acl_free(aclfile);
214 return -1;
215 }
216 }
217 /* Write the socket ACL */
218 if (0 > acl_calc_mask (&aclfile) ||
219 0 > acl_valid (aclfile) ||
220 0 > acl_set_file (path, ACL_TYPE_ACCESS, aclfile)) {
221 zlog(ZLOG_SYSERROR, "[pool %s] failed to write the ACL of the socket '%s'", wp->config->name, path);
222 acl_free(aclfile);
223 return -1;
224 } else {
225 zlog(ZLOG_DEBUG, "[pool %s] ACL of the socket '%s' is set", wp->config->name, path);
226 }
227
228 acl_free(aclfile);
229 return 0;
230 }
231 /* When listen.users and listen.groups not configured, continue with standard right */
232 #endif
233
234 if (wp->socket_uid != -1 || wp->socket_gid != -1) {
235 if (0 > chown(path, wp->socket_uid, wp->socket_gid)) {
236 zlog(ZLOG_SYSERROR, "[pool %s] failed to chown() the socket '%s'", wp->config->name, wp->config->listen_address);
237 return -1;
238 }
239 }
240 return 0;
241 }
242 /* }}} */
243
fpm_unix_free_socket_premissions(struct fpm_worker_pool_s * wp)244 int fpm_unix_free_socket_premissions(struct fpm_worker_pool_s *wp) /* {{{ */
245 {
246 #ifdef HAVE_FPM_ACL
247 if (wp->socket_acl) {
248 return acl_free(wp->socket_acl);
249 }
250 #endif
251 return 0;
252 }
253 /* }}} */
254
fpm_unix_conf_wp(struct fpm_worker_pool_s * wp)255 static int fpm_unix_conf_wp(struct fpm_worker_pool_s *wp) /* {{{ */
256 {
257 struct passwd *pwd;
258 int is_root = !geteuid();
259
260 if (is_root) {
261 if (wp->config->user && *wp->config->user) {
262 if (strlen(wp->config->user) == strspn(wp->config->user, "0123456789")) {
263 wp->set_uid = strtoul(wp->config->user, 0, 10);
264 } else {
265 struct passwd *pwd;
266
267 pwd = getpwnam(wp->config->user);
268 if (!pwd) {
269 zlog(ZLOG_ERROR, "[pool %s] cannot get uid for user '%s'", wp->config->name, wp->config->user);
270 return -1;
271 }
272
273 wp->set_uid = pwd->pw_uid;
274 wp->set_gid = pwd->pw_gid;
275
276 wp->user = strdup(pwd->pw_name);
277 wp->home = strdup(pwd->pw_dir);
278 }
279 }
280
281 if (wp->config->group && *wp->config->group) {
282 if (strlen(wp->config->group) == strspn(wp->config->group, "0123456789")) {
283 wp->set_gid = strtoul(wp->config->group, 0, 10);
284 } else {
285 struct group *grp;
286
287 grp = getgrnam(wp->config->group);
288 if (!grp) {
289 zlog(ZLOG_ERROR, "[pool %s] cannot get gid for group '%s'", wp->config->name, wp->config->group);
290 return -1;
291 }
292 wp->set_gid = grp->gr_gid;
293 }
294 }
295
296 if (!fpm_globals.run_as_root) {
297 if (wp->set_uid == 0 || wp->set_gid == 0) {
298 zlog(ZLOG_ERROR, "[pool %s] please specify user and group other than root", wp->config->name);
299 return -1;
300 }
301 }
302 } else { /* not root */
303 if (wp->config->user && *wp->config->user) {
304 zlog(ZLOG_NOTICE, "[pool %s] 'user' directive is ignored when FPM is not running as root", wp->config->name);
305 }
306 if (wp->config->group && *wp->config->group) {
307 zlog(ZLOG_NOTICE, "[pool %s] 'group' directive is ignored when FPM is not running as root", wp->config->name);
308 }
309 if (wp->config->chroot && *wp->config->chroot) {
310 zlog(ZLOG_NOTICE, "[pool %s] 'chroot' directive is ignored when FPM is not running as root", wp->config->name);
311 }
312 if (wp->config->process_priority != 64) {
313 zlog(ZLOG_NOTICE, "[pool %s] 'process.priority' directive is ignored when FPM is not running as root", wp->config->name);
314 }
315
316 /* set up HOME and USER anyway */
317 pwd = getpwuid(getuid());
318 if (pwd) {
319 wp->user = strdup(pwd->pw_name);
320 wp->home = strdup(pwd->pw_dir);
321 }
322 }
323 return 0;
324 }
325 /* }}} */
326
fpm_unix_init_child(struct fpm_worker_pool_s * wp)327 int fpm_unix_init_child(struct fpm_worker_pool_s *wp) /* {{{ */
328 {
329 int is_root = !geteuid();
330 int made_chroot = 0;
331
332 if (wp->config->rlimit_files) {
333 struct rlimit r;
334
335 r.rlim_max = r.rlim_cur = (rlim_t) wp->config->rlimit_files;
336
337 if (0 > setrlimit(RLIMIT_NOFILE, &r)) {
338 zlog(ZLOG_SYSERROR, "[pool %s] failed to set rlimit_files for this pool. Please check your system limits or decrease rlimit_files. setrlimit(RLIMIT_NOFILE, %d)", wp->config->name, wp->config->rlimit_files);
339 }
340 }
341
342 if (wp->config->rlimit_core) {
343 struct rlimit r;
344
345 r.rlim_max = r.rlim_cur = wp->config->rlimit_core == -1 ? (rlim_t) RLIM_INFINITY : (rlim_t) wp->config->rlimit_core;
346
347 if (0 > setrlimit(RLIMIT_CORE, &r)) {
348 zlog(ZLOG_SYSERROR, "[pool %s] failed to set rlimit_core for this pool. Please check your system limits or decrease rlimit_core. setrlimit(RLIMIT_CORE, %d)", wp->config->name, wp->config->rlimit_core);
349 }
350 }
351
352 if (is_root && wp->config->chroot && *wp->config->chroot) {
353 if (0 > chroot(wp->config->chroot)) {
354 zlog(ZLOG_SYSERROR, "[pool %s] failed to chroot(%s)", wp->config->name, wp->config->chroot);
355 return -1;
356 }
357 made_chroot = 1;
358 }
359
360 if (wp->config->chdir && *wp->config->chdir) {
361 if (0 > chdir(wp->config->chdir)) {
362 zlog(ZLOG_SYSERROR, "[pool %s] failed to chdir(%s)", wp->config->name, wp->config->chdir);
363 return -1;
364 }
365 } else if (made_chroot) {
366 if (0 > chdir("/")) {
367 zlog(ZLOG_WARNING, "[pool %s] failed to chdir(/)", wp->config->name);
368 }
369 }
370
371 if (is_root) {
372
373 if (wp->config->process_priority != 64) {
374 if (setpriority(PRIO_PROCESS, 0, wp->config->process_priority) < 0) {
375 zlog(ZLOG_SYSERROR, "[pool %s] Unable to set priority for this new process", wp->config->name);
376 return -1;
377 }
378 }
379
380 if (wp->set_gid) {
381 if (0 > setgid(wp->set_gid)) {
382 zlog(ZLOG_SYSERROR, "[pool %s] failed to setgid(%d)", wp->config->name, wp->set_gid);
383 return -1;
384 }
385 }
386 if (wp->set_uid) {
387 if (0 > initgroups(wp->config->user, wp->set_gid)) {
388 zlog(ZLOG_SYSERROR, "[pool %s] failed to initgroups(%s, %d)", wp->config->name, wp->config->user, wp->set_gid);
389 return -1;
390 }
391 if (0 > setuid(wp->set_uid)) {
392 zlog(ZLOG_SYSERROR, "[pool %s] failed to setuid(%d)", wp->config->name, wp->set_uid);
393 return -1;
394 }
395 }
396 }
397
398 #ifdef HAVE_PRCTL
399 if (wp->config->process_dumpable && 0 > prctl(PR_SET_DUMPABLE, 1, 0, 0, 0)) {
400 zlog(ZLOG_SYSERROR, "[pool %s] failed to prctl(PR_SET_DUMPABLE)", wp->config->name);
401 }
402 #endif
403
404 if (0 > fpm_clock_init()) {
405 return -1;
406 }
407
408 #ifdef HAVE_APPARMOR
409 if (wp->config->apparmor_hat) {
410 char *con, *new_con;
411
412 if (aa_getcon(&con, NULL) == -1) {
413 zlog(ZLOG_SYSERROR, "[pool %s] failed to query apparmor confinement. Please check if \"/proc/*/attr/current\" is read and writeable.", wp->config->name);
414 return -1;
415 }
416
417 new_con = malloc(strlen(con) + strlen(wp->config->apparmor_hat) + 3); // // + 0 Byte
418 if (!new_con) {
419 zlog(ZLOG_SYSERROR, "[pool %s] failed to allocate memory for apparmor hat change.", wp->config->name);
420 return -1;
421 }
422
423 if (0 > sprintf(new_con, "%s//%s", con, wp->config->apparmor_hat)) {
424 zlog(ZLOG_SYSERROR, "[pool %s] failed to construct apparmor confinement.", wp->config->name);
425 return -1;
426 }
427
428 if (0 > aa_change_profile(new_con)) {
429 zlog(ZLOG_SYSERROR, "[pool %s] failed to change to new confinement (%s). Please check if \"/proc/*/attr/current\" is read and writeable and \"change_profile -> %s//*\" is allowed.", wp->config->name, new_con, con);
430 return -1;
431 }
432
433 free(con);
434 free(new_con);
435 }
436 #endif
437
438 return 0;
439 }
440 /* }}} */
441
fpm_unix_init_main()442 int fpm_unix_init_main() /* {{{ */
443 {
444 struct fpm_worker_pool_s *wp;
445 int is_root = !geteuid();
446
447 if (fpm_global_config.rlimit_files) {
448 struct rlimit r;
449
450 r.rlim_max = r.rlim_cur = (rlim_t) fpm_global_config.rlimit_files;
451
452 if (0 > setrlimit(RLIMIT_NOFILE, &r)) {
453 zlog(ZLOG_SYSERROR, "failed to set rlimit_core for this pool. Please check your system limits or decrease rlimit_files. setrlimit(RLIMIT_NOFILE, %d)", fpm_global_config.rlimit_files);
454 return -1;
455 }
456 }
457
458 if (fpm_global_config.rlimit_core) {
459 struct rlimit r;
460
461 r.rlim_max = r.rlim_cur = fpm_global_config.rlimit_core == -1 ? (rlim_t) RLIM_INFINITY : (rlim_t) fpm_global_config.rlimit_core;
462
463 if (0 > setrlimit(RLIMIT_CORE, &r)) {
464 zlog(ZLOG_SYSERROR, "failed to set rlimit_core for this pool. Please check your system limits or decrease rlimit_core. setrlimit(RLIMIT_CORE, %d)", fpm_global_config.rlimit_core);
465 return -1;
466 }
467 }
468
469 fpm_pagesize = getpagesize();
470 if (fpm_global_config.daemonize) {
471 /*
472 * If daemonize, the calling process will die soon
473 * and the master process continues to initialize itself.
474 *
475 * The parent process has then to wait for the master
476 * process to initialize to return a consistent exit
477 * value. For this pupose, the master process will
478 * send \"1\" into the pipe if everything went well
479 * and \"0\" otherwise.
480 */
481
482
483 struct timeval tv;
484 fd_set rfds;
485 int ret;
486
487 if (pipe(fpm_globals.send_config_pipe) == -1) {
488 zlog(ZLOG_SYSERROR, "failed to create pipe");
489 return -1;
490 }
491
492 /* then fork */
493 pid_t pid = fork();
494 switch (pid) {
495
496 case -1 : /* error */
497 zlog(ZLOG_SYSERROR, "failed to daemonize");
498 return -1;
499
500 case 0 : /* children */
501 close(fpm_globals.send_config_pipe[0]); /* close the read side of the pipe */
502 break;
503
504 default : /* parent */
505 close(fpm_globals.send_config_pipe[1]); /* close the write side of the pipe */
506
507 /*
508 * wait for 10s before exiting with error
509 * the child is supposed to send 1 or 0 into the pipe to tell the parent
510 * how it goes for it
511 */
512 FD_ZERO(&rfds);
513 FD_SET(fpm_globals.send_config_pipe[0], &rfds);
514
515 tv.tv_sec = 10;
516 tv.tv_usec = 0;
517
518 zlog(ZLOG_DEBUG, "The calling process is waiting for the master process to ping via fd=%d", fpm_globals.send_config_pipe[0]);
519 ret = select(fpm_globals.send_config_pipe[0] + 1, &rfds, NULL, NULL, &tv);
520 if (ret == -1) {
521 zlog(ZLOG_SYSERROR, "failed to select");
522 exit(FPM_EXIT_SOFTWARE);
523 }
524 if (ret) { /* data available */
525 int readval;
526 ret = read(fpm_globals.send_config_pipe[0], &readval, sizeof(readval));
527 if (ret == -1) {
528 zlog(ZLOG_SYSERROR, "failed to read from pipe");
529 exit(FPM_EXIT_SOFTWARE);
530 }
531
532 if (ret == 0) {
533 zlog(ZLOG_ERROR, "no data have been read from pipe");
534 exit(FPM_EXIT_SOFTWARE);
535 } else {
536 if (readval == 1) {
537 zlog(ZLOG_DEBUG, "I received a valid acknowledge from the master process, I can exit without error");
538 fpm_cleanups_run(FPM_CLEANUP_PARENT_EXIT);
539 exit(FPM_EXIT_OK);
540 } else {
541 zlog(ZLOG_DEBUG, "The master process returned an error !");
542 exit(FPM_EXIT_SOFTWARE);
543 }
544 }
545 } else { /* no date sent ! */
546 zlog(ZLOG_ERROR, "the master process didn't send back its status (via the pipe to the calling process)");
547 exit(FPM_EXIT_SOFTWARE);
548 }
549 exit(FPM_EXIT_SOFTWARE);
550 }
551 }
552
553 /* continue as a child */
554 setsid();
555 if (0 > fpm_clock_init()) {
556 return -1;
557 }
558
559 if (fpm_global_config.process_priority != 64) {
560 if (is_root) {
561 if (setpriority(PRIO_PROCESS, 0, fpm_global_config.process_priority) < 0) {
562 zlog(ZLOG_SYSERROR, "Unable to set priority for the master process");
563 return -1;
564 }
565 } else {
566 zlog(ZLOG_NOTICE, "'process.priority' directive is ignored when FPM is not running as root");
567 }
568 }
569
570 fpm_globals.parent_pid = getpid();
571 for (wp = fpm_worker_all_pools; wp; wp = wp->next) {
572 if (0 > fpm_unix_conf_wp(wp)) {
573 return -1;
574 }
575 }
576
577 return 0;
578 }
579 /* }}} */
580
