getcwd.c revision 1.4
1 /* $NetBSD: getcwd.c,v 1.4 1999/06/19 18:02:06 sommerfeld Exp $ */ 2 3 /*- 4 * Copyright (c) 1999 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Bill Sommerfeld. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * test SYS___getcwd. 41 */ 42 43 #include <assert.h> 44 #include <err.h> 45 #include <errno.h> 46 #include <pwd.h> 47 #include <stdio.h> 48 #include <stdlib.h> 49 #include <string.h> 50 #include <time.h> 51 #include <unistd.h> 52 53 #include <sys/param.h> /* for MAXPATHLEN */ 54 #include <sys/types.h> 55 #include <sys/stat.h> 56 #include <sys/wait.h> 57 58 #include "getcwd.h" 59 60 int main __P((int, char *[])); 61 62 static void check1 __P((char *dir, char *buf, char *calltext, 63 int actual, int expected, int experr)); 64 65 static void time_old_getcwd __P((void)); 66 static void time_kern_getcwd __P((void)); 67 static void time_func __P((char *name, 68 void (*func)(void))); 69 70 static void test_speed __P((void)); 71 static void test___getcwd __P((void)); 72 static void test___getcwd_perms __P((void)); 73 static void test___getcwd_chroot __P((void)); 74 75 static void stress_test_getcwd __P((void)); 76 static void usage __P((char *progname)); 77 78 /* libc-private interface */ 79 int __getcwd __P((char *, size_t)); 80 81 /* 82 * test cases: 83 * NULL pointer 84 * broken pointer 85 * zero-length buffer 86 * negative length 87 * one-character buffer 88 * two-character buffer 89 * full-length buffer 90 * large (uncacheable) name in path. 91 * deleted directory 92 * after rename of parent. 93 * permission failure. 94 * good pointer near end of address space 95 * really huge length 96 * really large (multi-block) directories 97 * chroot interactions: 98 * chroot, at / inside the directory. 99 * chroot, at some other inside directory. 100 */ 101 102 /* 103 * test cases not yet done: 104 * -o union mount 105 * chroot interactions: 106 * chroot to mounted directory. 107 * (i.e., proc a: chroot /foo; sleep; 108 * proc b: mount blort /foo) 109 * concurrent with force-unmounting of filesystem. 110 */ 111 112 #define bigname "Funkelhausersteinweitz.SIPBADMIN.a" /* don't ask */ 113 #define littlename "getcwdtest" 114 #define othername "testgetcwd" 115 116 static int verbose = 0; 117 static int test = 1; 118 static int fail = 0; 119 static int pass = 0; 120 static int sleepflag = 0; 121 122 static uid_t altid = -1; 123 124 static void 125 check1 (dir, buf, calltext, actual, expected, experr) 126 char *dir; 127 char *buf; 128 char *calltext; 129 int actual, expected, experr; 130 { 131 int ntest = test++; 132 if (actual != expected) { 133 fprintf(stderr, 134 "test %d: in %s, %s failed; expected %d, got %d\n", 135 ntest, dir, calltext, expected, actual); 136 if (actual < 0) perror("getcwd"); 137 fail++; 138 } else if ((expected == -1) && (errno != (experr))) { 139 fprintf(stderr, 140 "test %d: in %s, %s failed; expected error %d, got %d\n", 141 ntest, dir, calltext, experr, errno); 142 if (actual < 0) perror("getcwd"); 143 fail++; 144 } else if ((expected > 0) && 145 (buf != NULL) && 146 (strcmp (dir, buf) != 0)) { 147 fprintf(stderr, 148 "test %d: in %s, %s got wrong dir %s\n", 149 ntest, dir, calltext, buf); 150 fail++; 151 } else { 152 if (expected > 0) { 153 char newbuf[1024]; 154 char *cp = old_getcwd(newbuf, sizeof(newbuf)); 155 if (cp == NULL) { 156 fail++; 157 fprintf(stderr, 158 "test %d: in %s, old getcwd failed!\n", 159 ntest, dir); 160 } else if (strcmp(cp, buf)) { 161 fail++; 162 fprintf(stderr, 163 "test %d: in %s, old_getcwd returned different dir %s\n", 164 ntest, dir, cp); 165 } 166 } 167 pass++; 168 if (verbose) 169 printf("test %d: in %s, %s passed\n", ntest, dir, calltext); 170 } 171 if (sleepflag) 172 sleep(1); 173 } 174 175 int nloops = 100; 176 177 void 178 time_old_getcwd() 179 { 180 char result_buf[1024]; 181 if (old_getcwd(result_buf, 1024) == NULL) { 182 fprintf(stderr, "old_getcwd failed during timing test!\n"); 183 perror("old_getcwd"); 184 exit(1); 185 } 186 187 } 188 189 void 190 time_kern_getcwd() 191 { 192 char result_buf[1024]; 193 if (__getcwd(result_buf, sizeof(result_buf)) < 0) { 194 fprintf(stderr, "getcwd failed during timing test!"); 195 perror("getcwd"); 196 exit(1); 197 } 198 } 199 200 static void 201 time_func(name, func) 202 char *name; 203 void (*func) __P((void)); 204 { 205 struct timeval before, after; 206 double delta_t; 207 208 int i; 209 chdir ("/usr/share/examples/emul/ultrix/etc"); 210 211 gettimeofday(&before, 0); 212 for (i=0; i<nloops; i++) { 213 (*func)(); 214 } 215 gettimeofday(&after, 0); 216 217 delta_t = after.tv_sec - before.tv_sec; 218 219 delta_t += ((double)(after.tv_usec - before.tv_usec))/1000000.0; 220 221 printf("%s: %d calls in %10.3f seconds; ", name, nloops, delta_t); 222 printf("%10.6f ms/call\n", (delta_t*1000.0)/nloops); 223 } 224 225 void 226 test_speed() 227 { 228 int i; 229 for (i=0; i<5; i++) 230 time_func("kernel getcwd", time_kern_getcwd); 231 232 for (i=0; i<5; i++) 233 time_func("old user-space getcwd", time_old_getcwd); 234 } 235 236 #define CHECK(dir, call, ret, err) \ 237 check1((dir), kbuf, #call, (call), (ret), (err)) 238 239 240 void 241 test___getcwd_perms() 242 { 243 char kbuf[1024]; 244 245 if (geteuid() != 0) 246 { 247 fprintf(stderr, "Not root; skipping permission tests\n"); 248 return; 249 } 250 251 mkdir ("/tmp/permdir", 0700); 252 mkdir ("/tmp/permdir/subdir", 0755); 253 chdir ("/tmp/permdir/subdir"); 254 255 seteuid(altid); 256 257 CHECK("/tmp/permdir/subdir", __getcwd(kbuf, sizeof(kbuf)), -1, EACCES); 258 259 seteuid(0); 260 chdir ("/"); 261 rmdir ("/tmp/permdir/subdir"); 262 rmdir ("/tmp/permdir"); 263 } 264 265 void 266 test___getcwd_chroot() 267 { 268 int pid, status; 269 char kbuf[1024]; 270 271 if (geteuid() != 0) 272 { 273 fprintf(stderr, "Not root; skipping chroot tests\n"); 274 return; 275 } 276 277 /* XXX we need fchroot to do this properly.. */ 278 mkdir ("/tmp/chrootdir", 0755); 279 mkdir ("/tmp/chrootdir/subdir", 0755); 280 281 chdir ("/tmp/chrootdir"); 282 283 CHECK ("/tmp/chrootdir", __getcwd(kbuf, sizeof(kbuf)), 15, 0); 284 285 fflush(NULL); 286 287 pid = fork(); 288 289 if (pid < 0) { 290 perror("fork"); 291 fail++; 292 } else if (pid == 0) { 293 fail = 0; 294 pass = 0; 295 /* chroot to root of filesystem (assuming MFS /tmp) */ 296 chroot ("/tmp"); 297 CHECK ("/chrootdir", __getcwd(kbuf, sizeof(kbuf)), 11, 0); 298 /* chroot to further down */ 299 chroot ("/chrootdir"); 300 CHECK ("/", __getcwd(kbuf, sizeof(kbuf)), 2, 0); 301 chdir("subdir"); 302 CHECK ("/subdir", __getcwd(kbuf, sizeof(kbuf)), 8, 0); 303 304 if (fail) 305 exit(1); 306 else 307 exit(0); 308 } else { 309 waitpid(pid, &status, 0); 310 311 if (WIFEXITED(status) && 312 (WEXITSTATUS(status) == 0)) 313 pass++; 314 else 315 fail++; 316 317 } 318 319 chdir ("/"); 320 rmdir ("/tmp/chrootdir/subdir"); 321 rmdir ("/tmp/chrootdir"); 322 } 323 324 325 326 327 void 328 test___getcwd() 329 { 330 int i; 331 static char kbuf[1024]; 332 333 chdir("/"); 334 335 CHECK("/", __getcwd(0, 0), -1, ERANGE); 336 CHECK("/", __getcwd(0, -1), -1, ERANGE); 337 CHECK("/", __getcwd(kbuf, 0xdeadbeef), -1, ERANGE); /* large negative */ 338 CHECK("/", __getcwd(kbuf, 0x7000beef), 2, 0); /* large positive, rounds down */ 339 CHECK("/", __getcwd(kbuf, 0x10000), 2, 0); /* slightly less large positive, rounds down */ 340 CHECK("/", __getcwd(kbuf+0x100000, sizeof(kbuf)), -1, EFAULT); /* outside address space */ 341 CHECK("/", __getcwd(0, 30), -1, EFAULT); 342 CHECK("/", __getcwd((void*)0xdeadbeef, 30), -1, EFAULT); 343 CHECK("/", __getcwd(kbuf, 2), 2, 0); 344 assert (strcmp(kbuf, "/") == 0); 345 CHECK("/", __getcwd(kbuf, sizeof(kbuf)), 2, 0); 346 347 CHECK("/", __getcwd(kbuf, 0), -1, ERANGE); 348 CHECK("/", __getcwd(kbuf, 1), -1, ERANGE); 349 350 chdir("/sbin"); 351 CHECK("/sbin", __getcwd(kbuf, sizeof(kbuf)), 6, 0); 352 /* verify that cacheable path gets range check right.. */ 353 CHECK("/sbin", __getcwd(kbuf, 3), -1, ERANGE); 354 chdir("/etc/mtree"); 355 CHECK("/etc/mtree", __getcwd(kbuf, sizeof(kbuf)), 11, 0); 356 CHECK("/etc/mtree", __getcwd(kbuf, sizeof(kbuf)), 11, 0); 357 /* mount point */ 358 chdir("/usr/bin"); 359 CHECK("/usr/bin", __getcwd(kbuf, sizeof(kbuf)), 9, 0); 360 361 /* really large (non-cacheable) entry name */ 362 chdir("/tmp"); 363 (void) rmdir(bigname); 364 mkdir(bigname, 0755); 365 chdir(bigname); 366 367 /* verify that non-cachable path gets range check right.. */ 368 CHECK("/tmp/" bigname, __getcwd(kbuf, 10), -1, ERANGE); 369 CHECK("/tmp/" bigname, __getcwd(kbuf, sizeof(kbuf)), 40, 0); 370 371 if (rmdir("/tmp/" bigname) < 0) { 372 perror("rmdir"); 373 } 374 CHECK("deleted directory", __getcwd(kbuf, sizeof(kbuf)), -1, ENOENT); 375 376 chdir("/tmp"); 377 (void) rmdir(littlename); 378 mkdir(littlename, 0755); 379 chdir(littlename); 380 CHECK("/tmp/" littlename, __getcwd(kbuf, sizeof(kbuf)), 16, 0); 381 if (rename("/tmp/" littlename, "/tmp/" othername) < 0) { 382 perror("rename"); 383 fail++; 384 } 385 CHECK("/tmp/" othername, __getcwd(kbuf, sizeof(kbuf)), 16, 0); 386 if (rmdir("/tmp/" othername) < 0) { 387 perror("rmdir"); 388 fail++; 389 } 390 CHECK("deleted directory", __getcwd(kbuf, sizeof(kbuf)), -1, ENOENT); 391 392 mkdir("/tmp/bigdir", 0755); 393 for (i=0; i<nloops; i++) { 394 char buf[MAXPATHLEN]; 395 snprintf(buf, MAXPATHLEN, "/tmp/bigdir/bigsubdirwithanamewhichistoolongtocache%04d", i); 396 (void)rmdir(buf); 397 if (mkdir (buf, 0755) < 0) { 398 perror("mkdir"); 399 fail++; 400 break; 401 } 402 } 403 for (i=0; i<nloops; i++) { 404 char buf[MAXPATHLEN]; 405 snprintf(buf, MAXPATHLEN, "/tmp/bigdir/bigsubdirwithanamewhichistoolongtocache%04d", i); 406 if (chdir(buf) < 0) { 407 perror("chdir"); 408 fail++; 409 break; 410 } 411 CHECK(buf, __getcwd(kbuf, sizeof(kbuf)), strlen(buf)+1, 0); 412 } 413 for (i=0; i<nloops; i++) { 414 char buf[MAXPATHLEN]; 415 snprintf(buf, MAXPATHLEN, "/tmp/bigdir/bigsubdirwithanamewhichistoolongtocache%04d", i); 416 (void)rmdir(buf); 417 } 418 (void)rmdir("/tmp/bigdir"); 419 420 test___getcwd_perms(); 421 test___getcwd_chroot(); 422 } 423 424 425 void 426 stress_test_getcwd() 427 { 428 char buf[MAXPATHLEN]; 429 char ubuf[MAXPATHLEN]; 430 char kbuf[MAXPATHLEN]; 431 printf("reading directories from stdin..\n"); 432 while (fgets(buf, MAXPATHLEN, stdin)) { 433 char *cp = strrchr(buf, '\n'); 434 if (cp) *cp = '\0'; 435 436 if (chdir (buf) < 0) { 437 warn("Can't change directory to %s", buf); 438 continue; 439 } 440 441 442 cp = old_getcwd (ubuf, MAXPATHLEN); 443 if (strcmp(buf, ubuf) != 0) { 444 warnx("In %s, old_getcwd says %s\n", 445 buf, ubuf); 446 } 447 448 449 CHECK(buf, __getcwd (kbuf, MAXPATHLEN), 450 strlen(ubuf)+1, 0); 451 } 452 } 453 454 455 /* 456 * - large directories. 457 * 458 * - every single filesystem type 459 * 460 * - walk filesystem, compare sys_getcwd with getcwd for each 461 * directory 462 */ 463 464 void 465 usage(progname) 466 char *progname; 467 { 468 fprintf(stderr, "usage: %s [-srpvw] [-l nloops]\n", progname); 469 exit(1); 470 } 471 472 int run_stress = 0; 473 int run_regression = 0; 474 int run_performance = 0; 475 476 int 477 main(argc, argv) 478 int argc; 479 char **argv; 480 { 481 int ch; 482 char *progname = argv[0]; 483 484 uid_from_user("nobody", &altid); 485 486 while ((ch = getopt(argc, argv, "srpvwl:u:")) != -1) 487 switch (ch) { 488 case 's': 489 run_stress++; 490 break; 491 case 'r': 492 run_regression++; 493 break; 494 case 'p': 495 run_performance++; 496 break; 497 case 'v': 498 verbose++; 499 break; 500 case 'w': 501 sleepflag++; 502 break; 503 case 'l': 504 nloops = atoi(optarg); 505 if (nloops == 0) 506 nloops = 100; 507 break; 508 case 'u': 509 if (uid_from_user(optarg, &altid) != 0) { 510 fprintf(stderr, "unknown user %s\n", optarg); 511 usage(progname); 512 exit(1); 513 } 514 break; 515 case '?': 516 default: 517 usage(progname); 518 } 519 if (argc != optind) 520 usage(progname); 521 522 if (run_regression) 523 test___getcwd(); 524 525 if (!fail && run_performance) 526 test_speed(); 527 528 if (!fail && run_stress) 529 stress_test_getcwd(); 530 531 532 if (verbose) 533 printf ("%d passes\n", pass); 534 if (!fail) 535 exit (0); 536 else { 537 printf("%d failures\n", fail); 538 exit(1); 539 } 540 } 541 542 543
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