1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 28 /* All Rights Reserved */ 29 30 /* 31 * University Copyright- Copyright (c) 1982, 1986, 1988 32 * The Regents of the University of California 33 * All Rights Reserved 34 * 35 * University Acknowledgment- Portions of this document are derived from 36 * software developed by the University of California, Berkeley, and its 37 * contributors. 38 */ 39 40 #pragma ident "%Z%%M% %I% %E% SMI" 41 42 #include <stdio.h> 43 #include <stdlib.h> 44 #include <ftw.h> 45 #include <signal.h> 46 #include <string.h> 47 #include <syslog.h> 48 #include <netconfig.h> 49 #include <unistd.h> 50 #include <netdb.h> 51 #include <rpc/rpc.h> 52 #include <netinet/in.h> 53 #include <sys/param.h> 54 #include <sys/resource.h> 55 #include <sys/file.h> 56 #include <sys/types.h> 57 #include <sys/stat.h> 58 #include <sys/sockio.h> 59 #include <dirent.h> 60 #include <errno.h> 61 #include <rpcsvc/sm_inter.h> 62 #include <rpcsvc/nsm_addr.h> 63 #include <thread.h> 64 #include <synch.h> 65 #include <net/if.h> 66 #include <limits.h> 67 #include <rpcsvc/daemon_utils.h> 68 #include <priv_utils.h> 69 #include "sm_statd.h" 70 71 72 #define home0 "/var/statmon" 73 #define current0 "/var/statmon/sm" 74 #define backup0 "/var/statmon/sm.bak" 75 #define state0 "/var/statmon/state" 76 77 #define home1 "statmon" 78 #define current1 "statmon/sm/" 79 #define backup1 "statmon/sm.bak/" 80 #define state1 "statmon/state" 81 82 /* 83 * User and group IDs to run as. These are hardwired, rather than looked 84 * up at runtime, because they are very unlikely to change and because they 85 * provide some protection against bogus changes to the passwd and group 86 * files. 87 */ 88 89 char STATE[MAXPATHLEN], CURRENT[MAXPATHLEN], BACKUP[MAXPATHLEN]; 90 static char statd_home[MAXPATHLEN]; 91 92 int debug; 93 int regfiles_only = 0; /* 1 => use symlinks in statmon, 0 => don't */ 94 char hostname[MAXHOSTNAMELEN]; 95 96 /* 97 * These variables will be used to store all the 98 * alias names for the host, as well as the -a 99 * command line hostnames. 100 */ 101 int host_name_count; 102 char **host_name; /* store -a opts */ 103 int addrix; /* # of -a entries */ 104 105 106 /* 107 * The following 2 variables are meaningful 108 * only under a HA configuration. 109 * The path_name array is dynamically allocated in main() during 110 * command line argument processing for the -p options. 111 */ 112 char **path_name = NULL; /* store -p opts */ 113 int pathix = 0; /* # of -p entries */ 114 115 /* Global variables. Refer to sm_statd.h for description */ 116 mutex_t crash_lock; 117 int die; 118 int in_crash; 119 cond_t crash_finish; 120 mutex_t sm_trylock; 121 rwlock_t thr_rwlock; 122 cond_t retrywait; 123 mutex_t name_addrlock; 124 125 /* forward references */ 126 static void set_statmon_owner(void); 127 static void copy_client_names(void); 128 static void one_statmon_owner(const char *); 129 static int nftw_owner(const char *, const struct stat *, int, struct FTW *); 130 131 /* 132 * statd protocol 133 * commands: 134 * SM_STAT 135 * returns stat_fail to caller 136 * SM_MON 137 * adds an entry to the monitor_q and the record_q 138 * This message is sent by the server lockd to the server 139 * statd, to indicate that a new client is to be monitored. 140 * It is also sent by the server lockd to the client statd 141 * to indicate that a new server is to be monitored. 142 * SM_UNMON 143 * removes an entry from the monitor_q and the record_q 144 * SM_UNMON_ALL 145 * removes all entries from a particular host from the 146 * monitor_q and the record_q. Our statd has this 147 * disabled. 148 * SM_SIMU_CRASH 149 * simulate a crash. removes everything from the 150 * record_q and the recovery_q, then calls statd_init() 151 * to restart things. This message is sent by the server 152 * lockd to the server statd to have all clients notified 153 * that they should reclaim locks. 154 * SM_NOTIFY 155 * Sent by statd on server to statd on client during 156 * crash recovery. The client statd passes the info 157 * to its lockd so it can attempt to reclaim the locks 158 * held on the server. 159 * 160 * There are three main hash tables used to keep track of things. 161 * mon_table 162 * table that keeps track hosts statd must watch. If one of 163 * these hosts crashes, then any locks held by that host must 164 * be released. 165 * record_table 166 * used to keep track of all the hostname files stored in 167 * the directory /var/statmon/sm. These are client hosts who 168 * are holding or have held a lock at some point. Needed 169 * to determine if a file needs to be created for host in 170 * /var/statmon/sm. 171 * recov_q 172 * used to keep track hostnames during a recovery 173 * 174 * The entries are hashed based upon the name. 175 * 176 * There is a directory /var/statmon/sm which holds a file named 177 * for each host that is holding (or has held) a lock. This is 178 * used during initialization on startup, or after a simulated 179 * crash. 180 */ 181 182 static void 183 sm_prog_1(rqstp, transp) 184 struct svc_req *rqstp; 185 SVCXPRT *transp; 186 { 187 union { 188 struct sm_name sm_stat_1_arg; 189 struct mon sm_mon_1_arg; 190 struct mon_id sm_unmon_1_arg; 191 struct my_id sm_unmon_all_1_arg; 192 struct stat_chge ntf_arg; 193 struct reg1args reg1_arg; 194 } argument; 195 196 union { 197 sm_stat_res stat_resp; 198 sm_stat mon_resp; 199 struct reg1res reg1_resp; 200 } result; 201 202 bool_t (*xdr_argument)(), (*xdr_result)(); 203 char *(*local)(); 204 205 /* 206 * Dispatch according to which protocol is being used: 207 * NSM_ADDR_PROGRAM is the private lockd address 208 * registration protocol. 209 * SM_PROG is the normal statd (NSM) protocol. 210 */ 211 if (rqstp->rq_prog == NSM_ADDR_PROGRAM) { 212 switch (rqstp->rq_proc) { 213 case NULLPROC: 214 svc_sendreply(transp, xdr_void, (caddr_t)NULL); 215 return; 216 217 case NSMADDRPROC1_REG: 218 xdr_argument = xdr_reg1args; 219 xdr_result = xdr_reg1res; 220 local = (char *(*)()) nsmaddrproc1_reg; 221 break; 222 223 default: 224 svcerr_noproc(transp); 225 return; 226 } 227 } else { 228 switch (rqstp->rq_proc) { 229 case NULLPROC: 230 svc_sendreply(transp, xdr_void, (caddr_t)NULL); 231 return; 232 233 case SM_STAT: 234 xdr_argument = xdr_sm_name; 235 xdr_result = xdr_sm_stat_res; 236 local = (char *(*)()) sm_status; 237 break; 238 239 case SM_MON: 240 xdr_argument = xdr_mon; 241 xdr_result = xdr_sm_stat_res; 242 local = (char *(*)()) sm_mon; 243 break; 244 245 case SM_UNMON: 246 xdr_argument = xdr_mon_id; 247 xdr_result = xdr_sm_stat; 248 local = (char *(*)()) sm_unmon; 249 break; 250 251 case SM_UNMON_ALL: 252 xdr_argument = xdr_my_id; 253 xdr_result = xdr_sm_stat; 254 local = (char *(*)()) sm_unmon_all; 255 break; 256 257 case SM_SIMU_CRASH: 258 xdr_argument = xdr_void; 259 xdr_result = xdr_void; 260 local = (char *(*)()) sm_simu_crash; 261 break; 262 263 case SM_NOTIFY: 264 xdr_argument = xdr_stat_chge; 265 xdr_result = xdr_void; 266 local = (char *(*)()) sm_notify; 267 break; 268 269 default: 270 svcerr_noproc(transp); 271 return; 272 } 273 } 274 275 (void) memset(&argument, 0, sizeof (argument)); 276 if (!svc_getargs(transp, xdr_argument, (caddr_t)&argument)) { 277 svcerr_decode(transp); 278 return; 279 } 280 281 (void) memset(&result, 0, sizeof (result)); 282 (*local)(&argument, &result); 283 if (!svc_sendreply(transp, xdr_result, (caddr_t)&result)) { 284 svcerr_systemerr(transp); 285 } 286 287 if (!svc_freeargs(transp, xdr_argument, (caddr_t)&argument)) { 288 syslog(LOG_ERR, "statd: unable to free arguments\n"); 289 } 290 } 291 292 /* 293 * Remove all files under directory path_dir. 294 */ 295 static int 296 remove_dir(path_dir) 297 char *path_dir; 298 { 299 DIR *dp; 300 struct dirent *dirp; 301 char tmp_path[MAXPATHLEN]; 302 303 if ((dp = opendir(path_dir)) == (DIR *)NULL) { 304 if (debug) 305 syslog(LOG_ERR, 306 "warning: open directory %s failed: %m\n", path_dir); 307 return (1); 308 } 309 310 while ((dirp = readdir(dp)) != NULL) { 311 if (strcmp(dirp->d_name, ".") != 0 && 312 strcmp(dirp->d_name, "..") != 0) { 313 if (strlen(path_dir) + strlen(dirp->d_name) +2 > 314 MAXPATHLEN) { 315 316 syslog(LOG_ERR, 317 "statd: remove dir %s/%s failed. Pathname too long.\n", 318 path_dir, dirp->d_name); 319 320 continue; 321 } 322 (void) strcpy(tmp_path, path_dir); 323 (void) strcat(tmp_path, "/"); 324 (void) strcat(tmp_path, dirp->d_name); 325 delete_file(tmp_path); 326 } 327 } 328 329 (void) closedir(dp); 330 return (0); 331 } 332 333 /* 334 * Copy all files from directory `from_dir' to directory `to_dir'. 335 * Symlinks, if any, are preserved. 336 */ 337 void 338 copydir_from_to(from_dir, to_dir) 339 char *from_dir; 340 char *to_dir; 341 { 342 int n; 343 DIR *dp; 344 struct dirent *dirp; 345 char rname[MAXNAMELEN + 1]; 346 char path[MAXPATHLEN+MAXNAMELEN+2]; 347 348 if ((dp = opendir(from_dir)) == (DIR *)NULL) { 349 if (debug) 350 syslog(LOG_ERR, 351 "warning: open directory %s failed: %m\n", from_dir); 352 return; 353 } 354 355 while ((dirp = readdir(dp)) != NULL) { 356 if (strcmp(dirp->d_name, ".") == 0 || 357 strcmp(dirp->d_name, "..") == 0) { 358 continue; 359 } 360 361 (void) strcpy(path, from_dir); 362 (void) strcat(path, "/"); 363 (void) strcat(path, dirp->d_name); 364 365 if (is_symlink(path)) { 366 /* 367 * Follow the link to get the referenced file name 368 * and make a new link for that file in to_dir. 369 */ 370 n = readlink(path, rname, MAXNAMELEN); 371 if (n <= 0) { 372 if (debug >= 2) { 373 (void) printf( 374 "copydir_from_to: can't read link %s\n", 375 path); 376 } 377 continue; 378 } 379 rname[n] = '\0'; 380 381 (void) create_symlink(to_dir, rname, dirp->d_name); 382 } else { 383 /* 384 * Simply copy regular files to to_dir. 385 */ 386 (void) strcpy(path, to_dir); 387 (void) strcat(path, "/"); 388 (void) strcat(path, dirp->d_name); 389 (void) create_file(path); 390 } 391 } 392 393 (void) closedir(dp); 394 } 395 396 static int 397 init_hostname(void) 398 { 399 struct lifnum lifn; 400 int sock; 401 402 if ((sock = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { 403 syslog(LOG_ERR, "statd:init_hostname, socket: %m"); 404 return (-1); 405 } 406 407 lifn.lifn_family = AF_UNSPEC; 408 lifn.lifn_flags = 0; 409 410 if (ioctl(sock, SIOCGLIFNUM, (char *)&lifn) < 0) { 411 syslog(LOG_ERR, 412 "statd:init_hostname, get number of interfaces, error: %m"); 413 close(sock); 414 return (-1); 415 } 416 417 host_name_count = lifn.lifn_count; 418 419 host_name = (char **)malloc(host_name_count * sizeof (char *)); 420 if (host_name == NULL) { 421 perror("statd -a can't get ip configuration\n"); 422 close(sock); 423 return (-1); 424 } 425 close(sock); 426 return (0); 427 } 428 429 int 430 main(int argc, char *argv[]) 431 { 432 int c; 433 int ppid; 434 extern char *optarg; 435 int choice = 0; 436 struct rlimit rl; 437 int mode; 438 int sz; 439 int connmaxrec = RPC_MAXDATASIZE; 440 441 addrix = 0; 442 pathix = 0; 443 444 (void) gethostname(hostname, MAXHOSTNAMELEN); 445 if (init_hostname() < 0) 446 exit(1); 447 448 while ((c = getopt(argc, argv, "Dd:a:p:r")) != EOF) 449 switch (c) { 450 case 'd': 451 (void) sscanf(optarg, "%d", &debug); 452 break; 453 case 'D': 454 choice = 1; 455 break; 456 case 'a': 457 if (addrix < host_name_count) { 458 if (strcmp(hostname, optarg) != 0) { 459 sz = strlen(optarg); 460 if (sz < MAXHOSTNAMELEN) { 461 host_name[addrix] = 462 (char *)xmalloc(sz+1); 463 if (host_name[addrix] != 464 NULL) { 465 (void) sscanf(optarg, "%s", 466 host_name[addrix]); 467 addrix++; 468 } 469 } else 470 (void) fprintf(stderr, 471 "statd: -a name of host is too long.\n"); 472 } 473 } else 474 (void) fprintf(stderr, 475 "statd: -a exceeding maximum hostnames\n"); 476 break; 477 case 'p': 478 if (strlen(optarg) < MAXPATHLEN) { 479 /* If the path_name array has not yet */ 480 /* been malloc'ed, do that. The array */ 481 /* should be big enough to hold all of the */ 482 /* -p options we might have. An upper */ 483 /* bound on the number of -p options is */ 484 /* argc/2, because each -p option consumes */ 485 /* two arguments. Here the upper bound */ 486 /* is supposing that all the command line */ 487 /* arguments are -p options, which would */ 488 /* actually never be the case. */ 489 if (path_name == NULL) { 490 size_t sz = (argc/2) * sizeof (char *); 491 492 path_name = (char **)malloc(sz); 493 if (path_name == NULL) { 494 (void) fprintf(stderr, 495 "statd: malloc failed\n"); 496 exit(1); 497 } 498 (void) memset(path_name, 0, sz); 499 } 500 path_name[pathix] = optarg; 501 pathix++; 502 } else { 503 (void) fprintf(stderr, 504 "statd: -p pathname is too long.\n"); 505 } 506 break; 507 case 'r': 508 regfiles_only = 1; 509 break; 510 default: 511 (void) fprintf(stderr, 512 "statd [-d level] [-D]\n"); 513 return (1); 514 } 515 516 if (choice == 0) { 517 (void) strcpy(statd_home, home0); 518 (void) strcpy(CURRENT, current0); 519 (void) strcpy(BACKUP, backup0); 520 (void) strcpy(STATE, state0); 521 } else { 522 (void) strcpy(statd_home, home1); 523 (void) strcpy(CURRENT, current1); 524 (void) strcpy(BACKUP, backup1); 525 (void) strcpy(STATE, state1); 526 } 527 if (debug) 528 (void) printf("debug is on, create entry: %s, %s, %s\n", 529 CURRENT, BACKUP, STATE); 530 531 if (getrlimit(RLIMIT_NOFILE, &rl)) 532 (void) printf("statd: getrlimit failed. \n"); 533 534 /* Set maxfdlimit current soft limit */ 535 rl.rlim_cur = MAX_FDS; 536 if (setrlimit(RLIMIT_NOFILE, &rl) != 0) 537 syslog(LOG_ERR, "statd: unable to set RLIMIT_NOFILE to %d\n", 538 MAX_FDS); 539 540 if (!debug) { 541 ppid = fork(); 542 if (ppid == -1) { 543 (void) fprintf(stderr, "statd: fork failure\n"); 544 (void) fflush(stderr); 545 abort(); 546 } 547 if (ppid != 0) { 548 exit(0); 549 } 550 closefrom(0); 551 (void) open("/dev/null", O_RDONLY); 552 (void) open("/dev/null", O_WRONLY); 553 (void) dup(1); 554 (void) setsid(); 555 openlog("statd", LOG_PID, LOG_DAEMON); 556 } 557 558 (void) _create_daemon_lock(STATD, DAEMON_UID, DAEMON_GID); 559 /* 560 * establish our lock on the lock file and write our pid to it. 561 * exit if some other process holds the lock, or if there's any 562 * error in writing/locking the file. 563 */ 564 ppid = _enter_daemon_lock(STATD); 565 switch (ppid) { 566 case 0: 567 break; 568 case -1: 569 syslog(LOG_ERR, "error locking for %s: %s", STATD, 570 strerror(errno)); 571 exit(2); 572 default: 573 /* daemon was already running */ 574 exit(0); 575 } 576 577 /* Get other aliases from each interface. */ 578 merge_hosts(); 579 580 /* 581 * Set to automatic mode such that threads are automatically 582 * created 583 */ 584 mode = RPC_SVC_MT_AUTO; 585 if (!rpc_control(RPC_SVC_MTMODE_SET, &mode)) { 586 syslog(LOG_ERR, 587 "statd:unable to set automatic MT mode."); 588 exit(1); 589 } 590 591 /* 592 * Set non-blocking mode and maximum record size for 593 * connection oriented RPC transports. 594 */ 595 if (!rpc_control(RPC_SVC_CONNMAXREC_SET, &connmaxrec)) { 596 syslog(LOG_INFO, "unable to set maximum RPC record size"); 597 } 598 599 if (!svc_create(sm_prog_1, SM_PROG, SM_VERS, "netpath")) { 600 syslog(LOG_ERR, 601 "statd: unable to create (SM_PROG, SM_VERS) for netpath."); 602 exit(1); 603 } 604 605 if (!svc_create(sm_prog_1, NSM_ADDR_PROGRAM, NSM_ADDR_V1, "netpath")) { 606 syslog(LOG_ERR, 607 "statd: unable to create (NSM_ADDR_PROGRAM, NSM_ADDR_V1) for netpath."); 608 } 609 610 /* 611 * Make sure /var/statmon and any alternate (-p) statmon 612 * directories exist and are owned by daemon. Then change our uid 613 * to daemon. The uid change is to prevent attacks against local 614 * daemons that trust any call from a local root process. 615 */ 616 617 set_statmon_owner(); 618 619 /* 620 * 621 * statd now runs as a daemon rather than root and can not 622 * dump core under / because of the permission. It is 623 * important that current working directory of statd be 624 * changed to writable directory /var/statmon so that it 625 * can dump the core upon the receipt of the signal. 626 * One still need to set allow_setid_core to non-zero in 627 * /etc/system to get the core dump. 628 * 629 */ 630 631 if (chdir(statd_home) < 0) { 632 syslog(LOG_ERR, "can't chdir %s: %m", statd_home); 633 exit(1); 634 } 635 636 copy_client_names(); 637 638 rwlock_init(&thr_rwlock, USYNC_THREAD, NULL); 639 mutex_init(&crash_lock, USYNC_THREAD, NULL); 640 mutex_init(&name_addrlock, USYNC_THREAD, NULL); 641 cond_init(&crash_finish, USYNC_THREAD, NULL); 642 cond_init(&retrywait, USYNC_THREAD, NULL); 643 sm_inithash(); 644 die = 0; 645 /* 646 * This variable is set to ensure that an sm_crash 647 * request will not be done at the same time 648 * when a statd_init is being done, since sm_crash 649 * can reset some variables that statd_init will be using. 650 */ 651 in_crash = 1; 652 statd_init(); 653 654 if (debug) 655 (void) printf("Starting svc_run\n"); 656 svc_run(); 657 syslog(LOG_ERR, "statd: svc_run returned\n"); 658 /* NOTREACHED */ 659 thr_exit((void *) 1); 660 return (0); 661 662 } 663 664 /* 665 * Make sure the ownership of the statmon directories is correct, then 666 * change our uid to match. If the top-level directories (/var/statmon, -p 667 * arguments) don't exist, they are created first. The sm and sm.bak 668 * directories are not created here, but if they already exist, they are 669 * chowned to the correct uid, along with anything else in the 670 * directories. 671 */ 672 673 static void 674 set_statmon_owner() 675 { 676 int i; 677 678 /* 679 * Recursively chown/chgrp /var/statmon and the alternate paths, 680 * creating them if necessary. 681 */ 682 one_statmon_owner(statd_home); 683 for (i = 0; i < pathix; i++) { 684 char alt_path[MAXPATHLEN]; 685 686 snprintf(alt_path, MAXPATHLEN, "%s/statmon", path_name[i]); 687 one_statmon_owner(alt_path); 688 } 689 690 if (__init_daemon_priv(PU_RESETGROUPS|PU_CLEARLIMITSET, 691 DAEMON_UID, DAEMON_GID, (char *)NULL) == -1) { 692 syslog(LOG_ERR, "can't run unprivileged: %m"); 693 exit(1); 694 } 695 696 __fini_daemon_priv(PRIV_PROC_EXEC, PRIV_PROC_SESSION, 697 PRIV_FILE_LINK_ANY, PRIV_PROC_INFO, (char *)NULL); 698 } 699 700 /* 701 * Copy client names from the alternate statmon directories into 702 * /var/statmon. The top-level (statmon) directories should already 703 * exist, though the sm and sm.bak directories might not. 704 */ 705 706 static void 707 copy_client_names() 708 { 709 int i; 710 char buf[MAXPATHLEN+SM_MAXPATHLEN]; 711 712 /* 713 * Copy all clients from alternate paths to /var/statmon/sm 714 * Remove the files in alternate directory when copying is done. 715 */ 716 for (i = 0; i < pathix; i++) { 717 /* 718 * If the alternate directories do not exist, create it. 719 * If they do exist, just do the copy. 720 */ 721 snprintf(buf, sizeof (buf), "%s/statmon/sm", path_name[i]); 722 if ((mkdir(buf, SM_DIRECTORY_MODE)) == -1) { 723 if (errno != EEXIST) { 724 syslog(LOG_ERR, 725 "can't mkdir %s: %m\n", buf); 726 continue; 727 } 728 copydir_from_to(buf, CURRENT); 729 (void) remove_dir(buf); 730 } 731 732 (void) snprintf(buf, sizeof (buf), "%s/statmon/sm.bak", 733 path_name[i]); 734 if ((mkdir(buf, SM_DIRECTORY_MODE)) == -1) { 735 if (errno != EEXIST) { 736 syslog(LOG_ERR, 737 "can't mkdir %s: %m\n", buf); 738 continue; 739 } 740 copydir_from_to(buf, BACKUP); 741 (void) remove_dir(buf); 742 } 743 } 744 } 745 746 /* 747 * Create the given directory if it doesn't already exist. Set the user 748 * and group to daemon for the directory and anything under it. 749 */ 750 751 static void 752 one_statmon_owner(const char *dir) 753 { 754 if ((mkdir(dir, SM_DIRECTORY_MODE)) == -1) { 755 if (errno != EEXIST) { 756 syslog(LOG_ERR, "can't mkdir %s: %m", 757 dir); 758 return; 759 } 760 } 761 762 if (debug) 763 printf("Setting owner for %s\n", dir); 764 765 if (nftw(dir, nftw_owner, MAX_FDS, FTW_PHYS) != 0) { 766 syslog(LOG_WARNING, "error setting owner for %s: %m", 767 dir); 768 } 769 } 770 771 /* 772 * Set the user and group to daemon for the given file or directory. If 773 * it's a directory, also makes sure that it is mode 755. 774 * Generates a syslog message but does not return an error if there were 775 * problems. 776 */ 777 778 /*ARGSUSED3*/ 779 static int 780 nftw_owner(const char *path, const struct stat *statp, int info, 781 struct FTW *ftw) 782 { 783 if (!(info == FTW_F || info == FTW_D)) 784 return (0); 785 786 /* 787 * Some older systems might have mode 777 directories. Fix that. 788 */ 789 790 if (info == FTW_D && (statp->st_mode & (S_IWGRP | S_IWOTH)) != 0) { 791 mode_t newmode = (statp->st_mode & ~(S_IWGRP | S_IWOTH)) & 792 S_IAMB; 793 794 if (debug) 795 printf("chmod %03o %s\n", newmode, path); 796 if (chmod(path, newmode) < 0) { 797 int error = errno; 798 799 syslog(LOG_WARNING, "can't chmod %s to %03o: %m", 800 path, newmode); 801 if (debug) 802 printf(" FAILED: %s\n", strerror(error)); 803 } 804 } 805 806 /* If already owned by daemon, don't bother changing. */ 807 if (statp->st_uid == DAEMON_UID && 808 statp->st_gid == DAEMON_GID) 809 return (0); 810 811 if (debug) 812 printf("lchown %s daemon:daemon\n", path); 813 if (lchown(path, DAEMON_UID, DAEMON_GID) < 0) { 814 int error = errno; 815 816 syslog(LOG_WARNING, "can't chown %s to daemon: %m", 817 path); 818 if (debug) 819 printf(" FAILED: %s\n", strerror(error)); 820 } 821 822 return (0); 823 } 824