| 1 | /* $Cambridge: exim/src/src/exim_lock.c,v 1.1 2004/10/07 10:39:01 ph10 Exp $ */ |
| 2 | |
| 3 | /* A program to lock a file exactly as Exim would, for investigation of |
| 4 | interlocking problems. |
| 5 | |
| 6 | Options: -fcntl use fcntl() lock |
| 7 | -flock use flock() lock |
| 8 | -lockfile use lock file |
| 9 | -mbx use mbx locking rules, with either fcntl() or flock() |
| 10 | |
| 11 | Default is -fcntl -lockfile. |
| 12 | |
| 13 | Argument: the name of the lock file |
| 14 | */ |
| 15 | |
| 16 | #include "os.h" |
| 17 | |
| 18 | #include <stdio.h> |
| 19 | #include <stdlib.h> |
| 20 | #include <string.h> |
| 21 | #include <signal.h> |
| 22 | #include <errno.h> |
| 23 | #include <time.h> |
| 24 | #include <netdb.h> |
| 25 | #include <fcntl.h> |
| 26 | #include <unistd.h> |
| 27 | #include <utime.h> |
| 28 | #include <sys/utsname.h> |
| 29 | #include <sys/stat.h> |
| 30 | #include <sys/file.h> |
| 31 | #include <pwd.h> |
| 32 | |
| 33 | /* Not all systems have flock() available. Those that do must define LOCK_SH |
| 34 | in sys/file.h. */ |
| 35 | |
| 36 | #ifndef LOCK_SH |
| 37 | #define NO_FLOCK |
| 38 | #endif |
| 39 | |
| 40 | |
| 41 | typedef int BOOL; |
| 42 | #define FALSE 0 |
| 43 | #define TRUE 1 |
| 44 | |
| 45 | |
| 46 | /* Flag for timeout signal handler */ |
| 47 | |
| 48 | static int sigalrm_seen = FALSE; |
| 49 | |
| 50 | |
| 51 | /* We need to pull in strerror() and os_non_restarting_signal() from the |
| 52 | os.c source, if they are required for this OS. However, we don't need any of |
| 53 | the other stuff in os.c, so force the other macros to omit it. */ |
| 54 | |
| 55 | #ifndef OS_RESTARTING_SIGNAL |
| 56 | #define OS_RESTARTING_SIGNAL |
| 57 | #endif |
| 58 | |
| 59 | #ifndef OS_STRSIGNAL |
| 60 | #define OS_STRSIGNAL |
| 61 | #endif |
| 62 | |
| 63 | #ifndef OS_STREXIT |
| 64 | #define OS_STREXIT |
| 65 | #endif |
| 66 | |
| 67 | #ifndef OS_LOAD_AVERAGE |
| 68 | #define OS_LOAD_AVERAGE |
| 69 | #endif |
| 70 | |
| 71 | #ifndef FIND_RUNNING_INTERFACES |
| 72 | #define FIND_RUNNING_INTERFACES |
| 73 | #endif |
| 74 | |
| 75 | #include "../src/os.c" |
| 76 | |
| 77 | |
| 78 | |
| 79 | /************************************************* |
| 80 | * Timeout handler * |
| 81 | *************************************************/ |
| 82 | |
| 83 | static void |
| 84 | sigalrm_handler(int sig) |
| 85 | { |
| 86 | sig = sig; /* Keep picky compilers happy */ |
| 87 | sigalrm_seen = TRUE; |
| 88 | } |
| 89 | |
| 90 | |
| 91 | |
| 92 | /************************************************* |
| 93 | * Give usage and die * |
| 94 | *************************************************/ |
| 95 | |
| 96 | static void |
| 97 | usage(void) |
| 98 | { |
| 99 | printf("usage: exim_lock [-v] [-q] [-lockfile] [-fcntl] [-flock] [-mbx]\n" |
| 100 | " [-retries <n>] [-interval <n>] [-timeout <n>] [-restore-times]\n" |
| 101 | " <file name> [command]\n"); |
| 102 | exit(1); |
| 103 | } |
| 104 | |
| 105 | |
| 106 | |
| 107 | /************************************************* |
| 108 | * Apply a lock to a file descriptor * |
| 109 | *************************************************/ |
| 110 | |
| 111 | static int |
| 112 | apply_lock(int fd, int fcntltype, BOOL dofcntl, int fcntltime, BOOL doflock, |
| 113 | int flocktime) |
| 114 | { |
| 115 | int yield = 0; |
| 116 | int save_errno; |
| 117 | struct flock lock_data; |
| 118 | lock_data.l_type = fcntltype; |
| 119 | lock_data.l_whence = lock_data.l_start = lock_data.l_len = 0; |
| 120 | |
| 121 | sigalrm_seen = FALSE; |
| 122 | |
| 123 | if (dofcntl) |
| 124 | { |
| 125 | if (fcntltime > 0) |
| 126 | { |
| 127 | os_non_restarting_signal(SIGALRM, sigalrm_handler); |
| 128 | alarm(fcntltime); |
| 129 | yield = fcntl(fd, F_SETLKW, &lock_data); |
| 130 | save_errno = errno; |
| 131 | alarm(0); |
| 132 | errno = save_errno; |
| 133 | } |
| 134 | else yield = fcntl(fd, F_SETLK, &lock_data); |
| 135 | if (yield < 0) printf("exim_lock: fcntl() failed: %s\n", strerror(errno)); |
| 136 | } |
| 137 | |
| 138 | #ifndef NO_FLOCK |
| 139 | if (doflock && (yield >= 0)) |
| 140 | { |
| 141 | int flocktype = (fcntltype == F_WRLCK)? LOCK_EX : LOCK_SH; |
| 142 | if (flocktime > 0) |
| 143 | { |
| 144 | os_non_restarting_signal(SIGALRM, sigalrm_handler); |
| 145 | alarm(flocktime); |
| 146 | yield = flock(fd, flocktype); |
| 147 | save_errno = errno; |
| 148 | alarm(0); |
| 149 | errno = save_errno; |
| 150 | } |
| 151 | else yield = flock(fd, flocktype | LOCK_NB); |
| 152 | if (yield < 0) printf("exim_lock: flock() failed: %s\n", strerror(errno)); |
| 153 | } |
| 154 | #endif |
| 155 | |
| 156 | return yield; |
| 157 | } |
| 158 | |
| 159 | |
| 160 | |
| 161 | /************************************************* |
| 162 | * The exim_lock program * |
| 163 | *************************************************/ |
| 164 | |
| 165 | int main(int argc, char **argv) |
| 166 | { |
| 167 | int lock_retries = 10; |
| 168 | int lock_interval = 3; |
| 169 | int lock_fcntl_timeout = 0; |
| 170 | int lock_flock_timeout = 0; |
| 171 | int i, j, len; |
| 172 | int fd = -1; |
| 173 | int hd = -1; |
| 174 | int md = -1; |
| 175 | int yield = 0; |
| 176 | int now = time(NULL); |
| 177 | BOOL use_lockfile = FALSE; |
| 178 | BOOL use_fcntl = FALSE; |
| 179 | BOOL use_flock = FALSE; |
| 180 | BOOL use_mbx = FALSE; |
| 181 | BOOL verbose = FALSE; |
| 182 | BOOL quiet = FALSE; |
| 183 | BOOL restore_times = FALSE; |
| 184 | char *filename; |
| 185 | char *lockname = NULL, *hitchname = NULL; |
| 186 | char *primary_hostname, *command; |
| 187 | struct utsname s; |
| 188 | char buffer[256]; |
| 189 | char tempname[256]; |
| 190 | |
| 191 | /* Decode options */ |
| 192 | |
| 193 | for (i = 1; i < argc; i++) |
| 194 | { |
| 195 | char *arg = argv[i]; |
| 196 | if (*arg != '-') break; |
| 197 | if (strcmp(arg, "-fcntl") == 0) use_fcntl = TRUE; |
| 198 | else if (strcmp(arg, "-flock") == 0) use_flock = TRUE; |
| 199 | else if (strcmp(arg, "-lockfile") == 0) use_lockfile = TRUE; |
| 200 | else if (strcmp(arg, "-mbx") == 0) use_mbx = TRUE; |
| 201 | else if (strcmp(arg, "-v") == 0) verbose = TRUE; |
| 202 | else if (strcmp(arg, "-q") == 0) quiet = TRUE; |
| 203 | else if (strcmp(arg, "-restore-times") == 0) restore_times = TRUE; |
| 204 | else if (++i < argc) |
| 205 | { |
| 206 | int value = atoi(argv[i]); |
| 207 | if (strcmp(arg, "-retries") == 0) lock_retries = value; |
| 208 | else if (strcmp(arg, "-interval") == 0) lock_interval = value; |
| 209 | else if (strcmp(arg, "-timeout") == 0) |
| 210 | lock_fcntl_timeout = lock_flock_timeout = value; |
| 211 | else usage(); |
| 212 | } |
| 213 | else usage(); |
| 214 | } |
| 215 | |
| 216 | if (quiet) verbose = 0; |
| 217 | |
| 218 | /* Can't use flock() if the OS doesn't provide it */ |
| 219 | |
| 220 | #ifdef NO_FLOCK |
| 221 | if (use_flock) |
| 222 | { |
| 223 | printf("exim_lock: can't use flock() because it was not available in the\n" |
| 224 | " operating system when exim_lock was compiled\n"); |
| 225 | exit(1); |
| 226 | } |
| 227 | #endif |
| 228 | |
| 229 | /* Default is to use lockfiles and fcntl(). */ |
| 230 | |
| 231 | if (!use_lockfile && !use_fcntl && !use_flock && !use_mbx) |
| 232 | use_lockfile = use_fcntl = TRUE; |
| 233 | |
| 234 | /* Default fcntl() for use with mbx */ |
| 235 | |
| 236 | if (use_mbx && !use_fcntl && !use_flock) use_fcntl = TRUE; |
| 237 | |
| 238 | /* Unset unused timeouts */ |
| 239 | |
| 240 | if (!use_fcntl) lock_fcntl_timeout = 0; |
| 241 | if (!use_flock) lock_flock_timeout = 0; |
| 242 | |
| 243 | /* A file name is required */ |
| 244 | |
| 245 | if (i >= argc) usage(); |
| 246 | |
| 247 | filename = argv[i++]; |
| 248 | |
| 249 | /* Expand file names starting with ~ */ |
| 250 | |
| 251 | if (*filename == '~') |
| 252 | { |
| 253 | struct passwd *pw; |
| 254 | |
| 255 | if (*(++filename) == '/') |
| 256 | pw = getpwuid(getuid()); |
| 257 | else |
| 258 | { |
| 259 | char *s = buffer; |
| 260 | while (*filename != 0 && *filename != '/') |
| 261 | *s++ = *filename++; |
| 262 | *s = 0; |
| 263 | pw = getpwnam(buffer); |
| 264 | } |
| 265 | |
| 266 | if (pw == NULL) |
| 267 | { |
| 268 | printf("exim_lock: unable to expand file name %s\n", argv[i-1]); |
| 269 | exit(1); |
| 270 | } |
| 271 | |
| 272 | if ((int)strlen(pw->pw_dir) + (int)strlen(filename) + 1 > sizeof(buffer)) |
| 273 | { |
| 274 | printf("exim_lock: expanded file name %s%s is too long", pw->pw_dir, |
| 275 | filename); |
| 276 | exit(1); |
| 277 | } |
| 278 | |
| 279 | strcpy(buffer, pw->pw_dir); |
| 280 | strcat(buffer, filename); |
| 281 | filename = buffer; |
| 282 | } |
| 283 | |
| 284 | /* If using a lock file, prepare by creating the lock file name and |
| 285 | the hitching post name. */ |
| 286 | |
| 287 | if (use_lockfile) |
| 288 | { |
| 289 | if (uname(&s) < 0) |
| 290 | { |
| 291 | printf("exim_lock: failed to find host name using uname()\n"); |
| 292 | exit(1); |
| 293 | } |
| 294 | primary_hostname = s.nodename; |
| 295 | |
| 296 | len = (int)strlen(filename); |
| 297 | lockname = malloc(len + 8); |
| 298 | sprintf(lockname, "%s.lock", filename); |
| 299 | hitchname = malloc(len + 32 + (int)strlen(primary_hostname)); |
| 300 | sprintf(hitchname, "%s.%s.%08x.%08x", lockname, primary_hostname, |
| 301 | now, (int)getpid()); |
| 302 | |
| 303 | if (verbose) |
| 304 | printf("exim_lock: lockname = %s\n hitchname = %s\n", lockname, |
| 305 | hitchname); |
| 306 | } |
| 307 | |
| 308 | /* Locking retry loop */ |
| 309 | |
| 310 | for (j = 0; j < lock_retries; j++) |
| 311 | { |
| 312 | int sleep_before_retry = TRUE; |
| 313 | struct stat statbuf, ostatbuf; |
| 314 | |
| 315 | /* Try to build a lock file if so configured */ |
| 316 | |
| 317 | if (use_lockfile) |
| 318 | { |
| 319 | int rc; |
| 320 | if (verbose) printf("exim_lock: creating lock file\n"); |
| 321 | hd = open(hitchname, O_WRONLY | O_CREAT | O_EXCL, 0440); |
| 322 | if (hd < 0) |
| 323 | { |
| 324 | printf("exim_lock: failed to create hitching post %s: %s\n", hitchname, |
| 325 | strerror(errno)); |
| 326 | exit(1); |
| 327 | } |
| 328 | |
| 329 | /* Apply hitching post algorithm. */ |
| 330 | |
| 331 | if ((rc = link(hitchname, lockname)) != 0) fstat(hd, &statbuf); |
| 332 | close(hd); |
| 333 | unlink(hitchname); |
| 334 | |
| 335 | if (rc != 0 && statbuf.st_nlink != 2) |
| 336 | { |
| 337 | printf("exim_lock: failed to link hitching post to lock file\n"); |
| 338 | hd = -1; |
| 339 | goto RETRY; |
| 340 | } |
| 341 | |
| 342 | if (!quiet) printf("exim_lock: lock file successfully created\n"); |
| 343 | } |
| 344 | |
| 345 | /* We are done if no other locking required. */ |
| 346 | |
| 347 | if (!use_fcntl && !use_flock && !use_mbx) break; |
| 348 | |
| 349 | /* Open the file for writing. */ |
| 350 | |
| 351 | fd = open(filename, O_RDWR + O_APPEND); |
| 352 | if (fd < 0) |
| 353 | { |
| 354 | printf("exim_lock: failed to open %s for writing: %s\n", filename, |
| 355 | strerror(errno)); |
| 356 | yield = 1; |
| 357 | goto CLEAN_UP; |
| 358 | } |
| 359 | |
| 360 | /* If there is a timeout, implying blocked locking, we don't want to |
| 361 | sleep before any retries after this. */ |
| 362 | |
| 363 | if (lock_fcntl_timeout > 0 || lock_flock_timeout > 0) |
| 364 | sleep_before_retry = FALSE; |
| 365 | |
| 366 | /* Lock using fcntl. There are pros and cons to using a blocking call vs |
| 367 | a non-blocking call and retries. Exim is non-blocking by default, but setting |
| 368 | a timeout changes it to blocking. */ |
| 369 | |
| 370 | if (!use_mbx && (use_fcntl || use_flock)) |
| 371 | { |
| 372 | if (apply_lock(fd, F_WRLCK, use_fcntl, lock_fcntl_timeout, use_flock, |
| 373 | lock_flock_timeout) >= 0) |
| 374 | { |
| 375 | if (!quiet) |
| 376 | { |
| 377 | if (use_fcntl) printf("exim_lock: fcntl() lock successfully applied\n"); |
| 378 | if (use_flock) printf("exim_lock: flock() lock successfully applied\n"); |
| 379 | } |
| 380 | break; |
| 381 | } |
| 382 | else goto RETRY; /* Message already output */ |
| 383 | } |
| 384 | |
| 385 | /* Lock using MBX rules. This is complicated and is documented with the |
| 386 | source of the c-client library that goes with Pine and IMAP. What has to |
| 387 | be done to interwork correctly is to take out a shared lock on the mailbox, |
| 388 | and an exclusive lock on a /tmp file. */ |
| 389 | |
| 390 | else |
| 391 | { |
| 392 | if (apply_lock(fd, F_RDLCK, use_fcntl, lock_fcntl_timeout, use_flock, |
| 393 | lock_flock_timeout) >= 0) |
| 394 | { |
| 395 | if (!quiet) |
| 396 | { |
| 397 | if (use_fcntl) |
| 398 | printf("exim_lock: fcntl() read lock successfully applied\n"); |
| 399 | if (use_flock) |
| 400 | printf("exim_lock: fcntl() read lock successfully applied\n"); |
| 401 | } |
| 402 | } |
| 403 | else goto RETRY; /* Message already output */ |
| 404 | |
| 405 | if (fstat(fd, &statbuf) < 0) |
| 406 | { |
| 407 | printf("exim_lock: fstat() of %s failed: %s\n", filename, |
| 408 | strerror(errno)); |
| 409 | yield = 1; |
| 410 | goto CLEAN_UP; |
| 411 | } |
| 412 | |
| 413 | /* Set up file in /tmp and check its state if already existing. */ |
| 414 | |
| 415 | sprintf(tempname, "/tmp/.%lx.%lx", (long)statbuf.st_dev, |
| 416 | (long)statbuf.st_ino); |
| 417 | |
| 418 | if (lstat(tempname, &statbuf) >= 0) |
| 419 | { |
| 420 | if ((statbuf.st_mode & S_IFMT) == S_IFLNK) |
| 421 | { |
| 422 | printf("exim_lock: symbolic link on lock name %s\n", tempname); |
| 423 | yield = 1; |
| 424 | goto CLEAN_UP; |
| 425 | } |
| 426 | if (statbuf.st_nlink > 1) |
| 427 | { |
| 428 | printf("exim_lock: hard link to lock name %s\n", tempname); |
| 429 | yield = 1; |
| 430 | goto CLEAN_UP; |
| 431 | } |
| 432 | } |
| 433 | |
| 434 | md = open(tempname, O_RDWR | O_CREAT, 0600); |
| 435 | if (md < 0) |
| 436 | { |
| 437 | printf("exim_lock: failed to create mbx lock file %s: %s\n", |
| 438 | tempname, strerror(errno)); |
| 439 | goto CLEAN_UP; |
| 440 | } |
| 441 | |
| 442 | chmod (tempname, 0600); |
| 443 | |
| 444 | if (apply_lock(md, F_WRLCK, use_fcntl, lock_fcntl_timeout, use_flock, |
| 445 | lock_flock_timeout) >= 0) |
| 446 | { |
| 447 | if (!quiet) |
| 448 | { |
| 449 | if (use_fcntl) |
| 450 | printf("exim_lock: fcntl() lock successfully applied to mbx " |
| 451 | "lock file %s\n", tempname); |
| 452 | if (use_flock) |
| 453 | printf("exim_lock: flock() lock successfully applied to mbx " |
| 454 | "lock file %s\n", tempname); |
| 455 | } |
| 456 | |
| 457 | /* This test checks for a race condition */ |
| 458 | |
| 459 | if (lstat(tempname, &statbuf) != 0 || |
| 460 | fstat(md, &ostatbuf) != 0 || |
| 461 | statbuf.st_dev != ostatbuf.st_dev || |
| 462 | statbuf.st_ino != ostatbuf.st_ino) |
| 463 | { |
| 464 | if (!quiet) printf("exim_lock: mbx lock file %s changed between " |
| 465 | "creation and locking\n", tempname); |
| 466 | goto RETRY; |
| 467 | } |
| 468 | else break; |
| 469 | } |
| 470 | else goto RETRY; /* Message already output */ |
| 471 | } |
| 472 | |
| 473 | /* Clean up before retrying */ |
| 474 | |
| 475 | RETRY: |
| 476 | |
| 477 | if (md >= 0) |
| 478 | { |
| 479 | if (close(md) < 0) |
| 480 | printf("exim_lock: close %s failed: %s\n", tempname, strerror(errno)); |
| 481 | else |
| 482 | if (!quiet) printf("exim_lock: %s closed\n", tempname); |
| 483 | md = -1; |
| 484 | } |
| 485 | |
| 486 | if (fd >= 0) |
| 487 | { |
| 488 | if (close(fd) < 0) |
| 489 | printf("exim_lock: close failed: %s\n", strerror(errno)); |
| 490 | else |
| 491 | if (!quiet) printf("exim_lock: file closed\n"); |
| 492 | fd = -1; |
| 493 | } |
| 494 | |
| 495 | if (hd >= 0) |
| 496 | { |
| 497 | if (unlink(lockname) < 0) |
| 498 | printf("exim_lock: unlink of %s failed: %s\n", lockname, strerror(errno)); |
| 499 | else |
| 500 | if (!quiet) printf("exim_lock: lock file removed\n"); |
| 501 | hd = -1; |
| 502 | } |
| 503 | |
| 504 | /* If a blocking call timed out, break the retry loop if the total time |
| 505 | so far is not less than than retries * interval. */ |
| 506 | |
| 507 | if (sigalrm_seen && |
| 508 | (j + 1) * ((lock_fcntl_timeout > lock_flock_timeout)? |
| 509 | lock_fcntl_timeout : lock_flock_timeout) >= |
| 510 | lock_retries * lock_interval) |
| 511 | j = lock_retries; |
| 512 | |
| 513 | /* Wait a bit before retrying, except when it was a blocked fcntl() that |
| 514 | caused the problem. */ |
| 515 | |
| 516 | if (j < lock_retries && sleep_before_retry) |
| 517 | { |
| 518 | printf(" ... waiting\n"); |
| 519 | sleep(lock_interval); |
| 520 | } |
| 521 | } |
| 522 | |
| 523 | if (j >= lock_retries) |
| 524 | { |
| 525 | printf("exim_lock: locking failed too many times\n"); |
| 526 | yield = 1; |
| 527 | goto CLEAN_UP; |
| 528 | } |
| 529 | |
| 530 | if (!quiet) printf("exim_lock: locking %s succeeded: ", filename); |
| 531 | |
| 532 | /* If there are no further arguments, run the user's shell; otherwise |
| 533 | the next argument is a command to run. */ |
| 534 | |
| 535 | if (i >= argc) |
| 536 | { |
| 537 | command = getenv("SHELL"); |
| 538 | if (command == NULL || *command == 0) command = "/bin/sh"; |
| 539 | if (!quiet) printf("running %s ...\n", command); |
| 540 | } |
| 541 | else |
| 542 | { |
| 543 | command = argv[i]; |
| 544 | if (!quiet) printf("running the command ...\n"); |
| 545 | } |
| 546 | |
| 547 | /* Run the command, saving and restoring the times if required. */ |
| 548 | |
| 549 | if (restore_times) |
| 550 | { |
| 551 | struct stat strestore; |
| 552 | struct utimbuf ut; |
| 553 | stat(filename, &strestore); |
| 554 | system(command); |
| 555 | ut.actime = strestore.st_atime; |
| 556 | ut.modtime = strestore.st_mtime; |
| 557 | utime(filename, &ut); |
| 558 | } |
| 559 | else system(command); |
| 560 | |
| 561 | /* Remove the locks and exit. Unlink the /tmp file if we can get an exclusive |
| 562 | lock on the mailbox. This should be a non-blocking lock call, as there is no |
| 563 | point in waiting. */ |
| 564 | |
| 565 | CLEAN_UP: |
| 566 | |
| 567 | if (md >= 0) |
| 568 | { |
| 569 | if (apply_lock(fd, F_WRLCK, use_fcntl, 0, use_flock, 0) >= 0) |
| 570 | { |
| 571 | if (!quiet) printf("exim_lock: %s unlinked - no sharers\n", tempname); |
| 572 | unlink(tempname); |
| 573 | } |
| 574 | else if (!quiet) |
| 575 | printf("exim_lock: %s not unlinked - unable to get exclusive mailbox lock\n", |
| 576 | tempname); |
| 577 | if (close(md) < 0) |
| 578 | printf("exim_lock: close %s failed: %s\n", tempname, strerror(errno)); |
| 579 | else |
| 580 | if (!quiet) printf("exim_lock: %s closed\n", tempname); |
| 581 | } |
| 582 | |
| 583 | if (fd >= 0) |
| 584 | { |
| 585 | if (close(fd) < 0) |
| 586 | printf("exim_lock: close %s failed: %s\n", filename, strerror(errno)); |
| 587 | else |
| 588 | if (!quiet) printf("exim_lock: %s closed\n", filename); |
| 589 | } |
| 590 | |
| 591 | if (hd >= 0) |
| 592 | { |
| 593 | if (unlink(lockname) < 0) |
| 594 | printf("exim_lock: unlink %s failed: %s\n", lockname, strerror(errno)); |
| 595 | else |
| 596 | if (!quiet) printf("exim_lock: lock file removed\n"); |
| 597 | } |
| 598 | |
| 599 | return yield; |
| 600 | } |
| 601 | |
| 602 | /* End */ |