test/test21.c

   1 /* POSIX test program (21).                     Author: Andy Tanenbaum */
   2
   3 /* The following POSIX calls are tested:
   4  *
   5  *      rename(),  mkdir(),  rmdir()
   6  */
   7
   8 #include <sys/types.h>
   9 #include <sys/stat.h>
  10 #include <errno.h>
  11 #include <fcntl.h>
  12 #include <limits.h>
  13 #include <stdlib.h>
  14 #include <string.h>
  15 #include <unistd.h>
  16 #include <stdio.h>
  17
  18 #define ITERATIONS        1
  19 #define MAX_ERROR 4
  20
  21 int subtest, errct;
  22
  23 _PROTOTYPE(int main, (int argc, char *argv []));
  24 _PROTOTYPE(void test21a, (void));
  25 _PROTOTYPE(void test21b, (void));
  26 _PROTOTYPE(void test21c, (void));
  27 _PROTOTYPE(void test21d, (void));
  28 _PROTOTYPE(void test21e, (void));
  29 _PROTOTYPE(void test21f, (void));
  30 _PROTOTYPE(void test21g, (void));
  31 _PROTOTYPE(void test21h, (void));
  32 _PROTOTYPE(void test21i, (void));
  33 _PROTOTYPE(void test21k, (void));
  34 _PROTOTYPE(void test21l, (void));
  35 _PROTOTYPE(void test21m, (void));
  36 _PROTOTYPE(void test21n, (void));
  37 _PROTOTYPE(void test21o, (void));
  38 _PROTOTYPE(int get_link, (char *name));
  39 _PROTOTYPE(void e, (int n));
  40 _PROTOTYPE(void quit, (void));
  41
  42 int main(argc, argv)
  43 int argc;
  44 char *argv[];
  45 {
  46
  47   int i, m = 0xFFFF;
  48
  49   sync();
  50   if (geteuid() == 0 || getuid() == 0) {
  51         printf("Test 21 cannot run as root; test aborted\n");
  52         exit(1);
  53   }
  54
  55   if (argc == 2) m = atoi(argv[1]);
  56   printf("Test 21 ");
  57   fflush(stdout);
  58
  59   system("rm -rf DIR_21; mkdir DIR_21");
  60   chdir("DIR_21");
  61
  62   for (i = 0; i < ITERATIONS; i++) {
  63         if (m & 00001) test21a();
  64         if (m & 00002) test21b();
  65         if (m & 00004) test21c();
  66         if (m & 00010) test21d();
  67         if (m & 00020) test21e();
  68         if (m & 00040) test21f();
  69         if (m & 01000) test21g();
  70         if (m & 00200) test21h();
  71         if (m & 00400) test21i();
  72         if (m & 01000) test21k();
  73         if (m & 02000) test21l();
  74         if (m & 04000) test21m();
  75         if (m & 010000) test21n();
  76         if (m & 020000) test21o();
  77   }
  78   quit();
  79   return(-1);                   /* impossible */
  80 }
  81
  82 void test21a()
  83 {
  84 /* Test rename(). */
  85
  86   int fd, fd2;
  87   char buf[PATH_MAX+1], buf1[PATH_MAX+1], buf2[PATH_MAX+1];
  88   struct stat stat1, stat2;
  89
  90   subtest = 1;
  91
  92   unlink("A1");                 /* get rid of it if it exists */
  93   unlink("A2");                 /* get rid of it if it exists */
  94   unlink("A3");                 /* get rid of it if it exists */
  95   unlink("A4");                 /* get rid of it if it exists */
  96   unlink("A5");                 /* get rid of it if it exists */
  97   unlink("A6");                 /* get rid of it if it exists */
  98   unlink("A7");                 /* get rid of it if it exists */
  99
 100   /* Basic test.  Rename A1 to A2 and then A2 to A3. */
 101   if ( (fd=creat("A1", 0666)) < 0) e(1);
 102   if (write(fd, buf, 20) != 20) e(2);
 103   if (close(fd) < 0) e(3);
 104   if (rename("A1", "A2") < 0) e(4);
 105   if ( (fd=open("A2", O_RDONLY)) < 0) e(5);
 106   if (rename("A2", "A3") < 0) e(6);
 107   if ( (fd2=open("A3", O_RDONLY)) < 0) e(7);
 108   if (close(fd) != 0) e(8);
 109   if (close(fd2) != 0) e(9);
 110   if (unlink("A3") != 0) e(10);
 111
 112   /* Now get the absolute path name of the current directory using getcwd()
 113    * and use it to test RENAME using different combinations of relative and
 114    * absolute path names.
 115    */
 116   if (getcwd(buf, PATH_MAX) == (char *) NULL) e(11);
 117   if ( (fd = creat("A4", 0666)) < 0) e(12);
 118   if (write(fd, buf, 30) != 30) e(13);
 119   if (close(fd) != 0) e(14);
 120   strcpy(buf1, buf);
 121   strcat(buf1, "/A4");
 122   if (rename(buf1, "A5") != 0) e(15);   /* rename(absolute, relative) */
 123   if (access("A5", 6) != 0) e(16);      /* use access to see if file exists */
 124   strcpy(buf2, buf);
 125   strcat(buf2, "/A6");
 126   if (rename("A5", buf2) != 0) e(17);   /* rename(relative, absolute) */
 127   if (access("A6", 6) != 0) e(18);
 128   if (access(buf2, 6) != 0) e(19);
 129   strcpy(buf1, buf);
 130   strcat(buf1, "/A6");
 131   strcpy(buf2, buf);
 132   strcat(buf2, "/A7");
 133   if (rename(buf1, buf2) != 0) e(20);   /* rename(absolute, absolute) */
 134   if (access("A7", 6) != 0) e(21);
 135   if (access(buf2, 6) != 0) e(22);
 136
 137   /* Try renaming using names like "./A8" */
 138   if (rename("A7", "./A8") != 0) e(23);
 139   if (access("A8", 6) != 0) e(24);
 140   if (rename("./A8", "A9") != 0) e(25);
 141   if (access("A9", 6) != 0) e(26);
 142   if (rename("./A9", "./A10") != 0) e(27);
 143   if (access("A10", 6) != 0) e(28);
 144   if (access("./A10", 6) != 0) e(29);
 145   if (unlink("A10") != 0) e(30);
 146
 147   /* Now see if directories can be renamed. */
 148   if (system("rm -rf ?uzzy scsi") != 0) e(31);
 149   if (system("mkdir fuzzy") != 0) e(32);
 150   if (rename("fuzzy", "wuzzy") != 0) e(33);
 151   if ( (fd=creat("wuzzy/was_a_bear", 0666)) < 0) e(34);
 152   if (access("wuzzy/was_a_bear", 6) != 0) e(35);
 153   if (unlink("wuzzy/was_a_bear") != 0) e(36);
 154   if (close(fd) != 0) e(37);
 155   if (rename("wuzzy", "buzzy") != 0) e(38);
 156   if (system("rmdir buzzy") != 0) e(39);
 157
 158   /* Now start testing the case that 'new' exists. */
 159   if ( (fd = creat("horse", 0666)) < 0) e(40);
 160   if ( (fd2 = creat("sheep", 0666)) < 0) e(41);
 161   if (write(fd, buf, PATH_MAX) != PATH_MAX) e(42);
 162   if (write(fd2, buf, 23) != 23) e(43);
 163   if (stat("horse", &stat1) != 0) e(44);
 164   if (rename("horse", "sheep") != 0) e(45);
 165   if (stat("sheep", &stat2) != 0) e(46);
 166   if (stat1.st_dev != stat2.st_dev) e(47);
 167   if (stat1.st_ino != stat2.st_ino) e(48);
 168   if (stat2.st_size != PATH_MAX) e(49);
 169   if (access("horse", 6) == 0) e(50);
 170   if (close(fd) != 0) e(51);
 171   if (close(fd2) != 0) e(52);
 172   if (rename("sheep", "sheep") != 0) e(53);
 173   if (unlink("sheep") != 0) e(54);
 174
 175   /* Now try renaming something to a directory that already exists. */
 176   if (system("mkdir fuzzy wuzzy") != 0) e(55);
 177   if ( (fd = creat("fuzzy/was_a_bear", 0666)) < 0) e(56);
 178   if (close(fd) != 0) e(57);
 179   if (rename("fuzzy", "wuzzy") != 0) e(58);     /* 'new' is empty dir */
 180   if (system("mkdir scsi") != 0) e(59);
 181   if (rename("scsi", "wuzzy") == 0) e(60);      /* 'new' is full dir */
 182   if (errno != EEXIST && errno != ENOTEMPTY) e(61);
 183
 184   /* Test 14 character names--always tricky. */
 185   if (rename("wuzzy/was_a_bear", "wuzzy/was_not_a_bear") != 0) e(62);
 186   if (access("wuzzy/was_not_a_bear", 6) != 0) e(63);
 187   if (rename("wuzzy/was_not_a_bear", "wuzzy/was_not_a_duck") != 0) e(64);
 188   if (access("wuzzy/was_not_a_duck", 6) != 0) e(65);
 189   if (rename("wuzzy/was_not_a_duck", "wuzzy/was_a_bird") != 0) e(65);
 190   if (access("wuzzy/was_a_bird", 6) != 0) e(66);
 191
 192   /* Test moves between directories. */
 193   if (rename("wuzzy/was_a_bird", "beast") != 0) e(67);
 194   if (access("beast", 6) != 0) e(68);
 195   if (rename("beast", "wuzzy/was_a_cat") != 0) e(69);
 196   if (access("wuzzy/was_a_cat", 6) != 0) e(70);
 197
 198   /* Test error conditions. 'scsi' and 'wuzzy/was_a_cat' exist now. */
 199   if (rename("wuzzy/was_a_cat", "wuzzy/was_a_dog") != 0) e(71);
 200   if (access("wuzzy/was_a_dog", 6) != 0) e(72);
 201   if (chmod("wuzzy", 0) != 0) e(73);
 202
 203   errno = 0;
 204   if (rename("wuzzy/was_a_dog", "wuzzy/was_a_pig") != -1) e(74);
 205   if (errno != EACCES) e(75);
 206
 207   errno = 0;
 208   if (rename("wuzzy/was_a_dog", "doggie") != -1) e(76);
 209   if (errno != EACCES) e(77);
 210
 211   errno = 0;
 212   if ( (fd = creat("beast", 0666)) < 0) e(78);
 213   if (close(fd) != 0) e(79);
 214   if (rename("beast", "wuzzy/was_a_twit") != -1) e(80);
 215   if (errno != EACCES) e(81);
 216
 217   errno = 0;
 218   if (rename("beast", "wuzzy") != -1) e(82);
 219   if (errno != EISDIR) e(83);
 220
 221   errno = 0;
 222   if (rename("beest", "baste") != -1) e(84);
 223   if (errno != ENOENT) e(85);
 224
 225   errno = 0;
 226   if (rename("wuzzy", "beast") != -1) e(86);
 227   if (errno != ENOTDIR) e(87);
 228
 229   /* Test prefix rule. */
 230   errno = 0;
 231   if (chmod("wuzzy", 0777) != 0) e(88);
 232   if (unlink("wuzzy/was_a_dog") != 0) e(89);
 233   strcpy(buf1, buf);
 234   strcat(buf1, "/wuzzy");
 235   if (rename(buf, buf1) != -1) e(90);
 236   if (errno != EINVAL) e(91);
 237
 238   if (system("rm -rf wuzzy beast scsi") != 0) e(92);
 239 }
 240
 241
 242
 243 void test21b()
 244 {
 245 /* Test mkdir() and rmdir(). */
 246
 247   int i;
 248   char name[3];
 249   struct stat statbuf;
 250
 251   subtest = 2;
 252
 253   /* Simple stuff. */
 254   if (mkdir("D1", 0700) != 0) e(1);
 255   if (stat("D1", &statbuf) != 0) e(2);
 256   if (!S_ISDIR(statbuf.st_mode)) e(3);
 257   if ( (statbuf.st_mode & 0777) != 0700) e(4);
 258   if (rmdir("D1") != 0) e(5);
 259
 260   /* Make and remove 40 directories.  By doing so, the directory has to
 261    * grow to 2 blocks.  That presents plenty of opportunity for bugs.
 262    */
 263   name[0] = 'D';
 264   name[2] = '\0';
 265   for (i = 0; i < 40; i++) {
 266         name[1] = 'A' + i;
 267         if (mkdir(name, 0700 + i%7) != 0) e(10+i);      /* for simplicity */
 268   }
 269   for (i = 0; i < 40; i++) {
 270         name[1] = 'A' + i;
 271         if (rmdir(name) != 0) e(50+i);
 272   }
 273 }
 274
 275 void test21c()
 276 {
 277 /* Test mkdir() and rmdir(). */
 278
 279   subtest = 3;
 280
 281   if (mkdir("D1", 0777) != 0) e(1);
 282   if (mkdir("D1/D2", 0777) != 0) e(2);
 283   if (mkdir("D1/D2/D3", 0777) != 0) e(3);
 284   if (mkdir("D1/D2/D3/D4", 0777) != 0) e(4);
 285   if (mkdir("D1/D2/D3/D4/D5", 0777) != 0) e(5);
 286   if (mkdir("D1/D2/D3/D4/D5/D6", 0777) != 0) e(6);
 287   if (mkdir("D1/D2/D3/D4/D5/D6/D7", 0777) != 0) e(7);
 288   if (mkdir("D1/D2/D3/D4/D5/D6/D7/D8", 0777) != 0) e(8);
 289   if (mkdir("D1/D2/D3/D4/D5/D6/D7/D8/D9", 0777) != 0) e(9);
 290   if (access("D1/D2/D3/D4/D5/D6/D7/D8/D9", 7) != 0) e(10);
 291   if (rmdir("D1/D2/D3/D4/D5/D6/D7/D8/D9") != 0) e(11);
 292   if (rmdir("D1/D2/D3/D4/D5/D6/D7/D8") != 0) e(12);
 293   if (rmdir("D1/D2/D3/D4/D5/D6/D7") != 0) e(13);
 294   if (rmdir("D1/D2/D3/D4/D5/D6") != 0) e(11);
 295   if (rmdir("D1/D2/D3/D4/D5") != 0) e(13);
 296   if (rmdir("D1/D2/D3/D4") != 0) e(14);
 297   if (rmdir("D1/D2/D3") != 0) e(15);
 298   if (rmdir("D1/D2") != 0) e(16);
 299   if (rmdir("D1") != 0) e(17);
 300 }
 301
 302 void test21d()
 303 {
 304 /* Test making directories with files and directories in them. */
 305
 306   int fd1, fd2, fd3, fd4, fd5, fd6, fd7, fd8, fd9;
 307
 308   subtest = 4;
 309
 310   if (mkdir("D1", 0777) != 0) e(1);
 311   if (mkdir("D1/D2", 0777) != 0) e(2);
 312   if (mkdir("./D1/D3", 0777) != 0) e(3);
 313   if (mkdir("././D1/D4", 0777) != 0) e(4);
 314   if ( (fd1 = creat("D1/D2/x", 0700)) < 0) e(5);
 315   if ( (fd2 = creat("D1/D2/y", 0700)) < 0) e(6);
 316   if ( (fd3 = creat("D1/D2/z", 0700)) < 0) e(7);
 317   if ( (fd4 = creat("D1/D3/x", 0700)) < 0) e(8);
 318   if ( (fd5 = creat("D1/D3/y", 0700)) < 0) e(9);
 319   if ( (fd6 = creat("D1/D3/z", 0700)) < 0) e(10);
 320   if ( (fd7 = creat("D1/D4/x", 0700)) < 0) e(11);
 321   if ( (fd8 = creat("D1/D4/y", 0700)) < 0) e(12);
 322   if ( (fd9 = creat("D1/D4/z", 0700)) < 0) e(13);
 323   if (unlink("D1/D2/z") != 0) e(14);
 324   if (unlink("D1/D2/y") != 0) e(15);
 325   if (unlink("D1/D2/x") != 0) e(16);
 326   if (unlink("D1/D3/x") != 0) e(17);
 327   if (unlink("D1/D3/z") != 0) e(18);
 328   if (unlink("D1/D3/y") != 0) e(19);
 329   if (unlink("D1/D4/y") != 0) e(20);
 330   if (unlink("D1/D4/z") != 0) e(21);
 331   if (unlink("D1/D4/x") != 0) e(22);
 332   if (rmdir("D1/D2") != 0) e(23);
 333   if (rmdir("D1/D3") != 0) e(24);
 334   if (rmdir("D1/D4") != 0) e(25);
 335   if (rmdir("D1") != 0) e(26);
 336   if (close(fd1) != 0) e(27);
 337   if (close(fd2) != 0) e(28);
 338   if (close(fd3) != 0) e(29);
 339   if (close(fd4) != 0) e(30);
 340   if (close(fd5) != 0) e(31);
 341   if (close(fd6) != 0) e(32);
 342   if (close(fd7) != 0) e(33);
 343   if (close(fd8) != 0) e(34);
 344   if (close(fd9) != 0) e(35);
 345
 346 }
 347
 348 void test21e()
 349 {
 350 /* Test error conditions. */
 351
 352   subtest = 5;
 353
 354   if (mkdir("D1", 0677) != 0) e(1);
 355   errno = 0;
 356   if (mkdir("D1/D2", 0777) != -1) e(2);
 357   if (errno != EACCES) e(3);
 358   if (chmod ("D1", 0577) != 0) e(4);
 359   errno = 0;
 360   if (mkdir("D1/D2", 0777) != -1) e(5);
 361   if (errno != EACCES) e(6);
 362   if (chmod ("D1", 0777) != 0) e(7);
 363   errno = 0;
 364   if (mkdir("D1", 0777) != -1) e(8);
 365   if (errno != EEXIST) e(9);
 366 #if NAME_MAX == 14
 367   if (mkdir("D1/ABCDEFGHIJKLMNOPQRSTUVWXYZ", 0777) != 0) e(10);
 368   if (access("D1/ABCDEFGHIJKLMN", 7 ) != 0) e(11);
 369   if (rmdir("D1/ABCDEFGHIJKLMNOPQ") != 0) e(12);
 370   if (access("D1/ABCDEFGHIJKLMN", 7 ) != -1) e(13);
 371 #endif
 372   errno = 0;
 373   if (mkdir("D1/D2/x", 0777) != -1) e(14);
 374   if (errno != ENOENT) e(15);
 375
 376   /* A particularly nasty test is when the parent has mode 0.  Although
 377    * this is unlikely to work, it had better not muck up the file system
 378    */
 379   if (mkdir("D1/D2", 0777) != 0) e(16);
 380   if (chmod("D1", 0) != 0) e(17);
 381   errno = 0;
 382   if (rmdir("D1/D2") != -1) e(18);
 383   if (errno != EACCES) e(19);
 384   if (chmod("D1", 0777) != 0) e(20);
 385   if (rmdir("D1/D2") != 0) e(21);
 386   if (rmdir("D1") != 0) e(22);
 387 }
 388
 389 void test21f()
 390 {
 391 /* The rename() function affects the link count of all the files and
 392  * directories it goes near.  Test to make sure it gets everything ok.
 393  * There are four cases:
 394  *
 395  *   1. rename("d1/file1", "d1/file2"); - rename file without moving it
 396  *   2. rename("d1/file1", "d2/file2"); - move a file to another dir
 397  *   3. rename("d1/dir1", "d2/dir2");   - rename a dir without moving it
 398  *   4. rename("d1/dir1", "d2/dir2");   - move a dir to another dir
 399  *
 400  * Furthermore, a distinction has to be made when the target file exists
 401  * and when it does not exist, giving 8 cases in all.
 402  */
 403
 404   int fd, D1_before, D1_after, x_link, y_link;
 405
 406   /* Test case 1: renaming a file within the same directory. */
 407   subtest = 6;
 408   if (mkdir("D1", 0777) != 0) e(1);
 409   if ( (fd = creat("D1/x", 0777)) < 0) e(2);
 410   if (close(fd) != 0) e(3);
 411   D1_before = get_link("D1");
 412   x_link = get_link("D1/x");
 413   if (rename("D1/x", "D1/y") != 0) e(4);
 414   y_link = get_link("D1/y");
 415   D1_after = get_link("D1");
 416   if (D1_before != 2) e(5);
 417   if (D1_after != 2) e(6);
 418   if (x_link != 1) e(7);
 419   if (y_link != 1) e(8);
 420   if (access("D1/y", 7) != 0) e(9);
 421   if (unlink("D1/y") != 0) e(10);
 422   if (rmdir("D1") != 0) e(11);
 423 }
 424
 425 void test21g()
 426 {
 427   int fd, D1_before, D1_after, D2_before, D2_after, x_link, y_link;
 428
 429   /* Test case 2: move a file to a new directory. */
 430   subtest = 7;
 431   if (mkdir("D1", 0777) != 0) e(1);
 432   if (mkdir("D2", 0777) != 0) e(2);
 433   if ( (fd = creat("D1/x", 0777)) < 0) e(3);
 434   if (close(fd) != 0) e(4);
 435   D1_before = get_link("D1");
 436   D2_before = get_link("D2");
 437   x_link = get_link("D1/x");
 438   if (rename("D1/x", "D2/y") != 0) e(5);
 439   y_link = get_link("D2/y");
 440   D1_after = get_link("D1");
 441   D2_after = get_link("D2");
 442   if (D1_before != 2) e(6);
 443   if (D2_before != 2) e(7);
 444   if (D1_after != 2) e(8);
 445   if (D2_after != 2) e(9);
 446   if (x_link != 1) e(10);
 447   if (y_link != 1) e(11);
 448   if (access("D2/y", 7) != 0) e(12);
 449   if (unlink("D2/y") != 0) e(13);
 450   if (rmdir("D1") != 0) e(14);
 451   if (rmdir("D2") != 0) e(15);
 452 }
 453
 454 void test21h()
 455 {
 456   int D1_before, D1_after, x_link, y_link;
 457
 458   /* Test case 3: renaming a directory within the same directory. */
 459   subtest = 8;
 460   if (mkdir("D1", 0777) != 0) e(1);
 461   if (mkdir("D1/X", 0777) != 0) e(2);
 462   D1_before = get_link("D1");
 463   x_link = get_link("D1/X");
 464   if (rename("D1/X", "D1/Y") != 0) e(3);
 465   y_link = get_link("D1/Y");
 466   D1_after = get_link("D1");
 467   if (D1_before != 3) e(4);
 468   if (D1_after != 3) e(5);
 469   if (x_link != 2) e(6);
 470   if (y_link != 2) e(7);
 471   if (access("D1/Y", 7) != 0) e(8);
 472   if (rmdir("D1/Y") != 0) e(9);
 473   if (get_link("D1") != 2) e(10);
 474   if (rmdir("D1") != 0) e(11);
 475 }
 476
 477 void test21i()
 478 {
 479   int D1_before, D1_after, D2_before, D2_after, x_link, y_link;
 480
 481   /* Test case 4: move a directory to a new directory. */
 482   subtest = 9;
 483   if (mkdir("D1", 0777) != 0) e(1);
 484   if (mkdir("D2", 0777) != 0) e(2);
 485   if (mkdir("D1/X", 0777) != 0) e(3);
 486   D1_before = get_link("D1");
 487   D2_before = get_link("D2");
 488   x_link = get_link("D1/X");
 489   if (rename("D1/X", "D2/Y") != 0) e(4);
 490   y_link = get_link("D2/Y");
 491   D1_after = get_link("D1");
 492   D2_after = get_link("D2");
 493   if (D1_before != 3) e(5);
 494   if (D2_before != 2) e(6);
 495   if (D1_after != 2) e(7);
 496   if (D2_after != 3) e(8);
 497   if (x_link != 2) e(9);
 498   if (y_link != 2) e(10);
 499   if (access("D2/Y", 7) != 0) e(11);
 500   if (rename("D2/Y", "D1/Z") != 0) e(12);
 501   if (get_link("D1") != 3) e(13);
 502   if (get_link("D2") != 2) e(14);
 503   if (rmdir("D1/Z") != 0) e(15);
 504   if (get_link("D1") != 2) e(16);
 505   if (rmdir("D1") != 0) e(17);
 506   if (rmdir("D2") != 0) e(18);
 507 }
 508
 509 void test21k()
 510 {
 511 /* Now test the same 4 cases, except when the target exists. */
 512
 513   int fd, D1_before, D1_after, x_link, y_link;
 514
 515   /* Test case 5: renaming a file within the same directory. */
 516   subtest = 10;
 517   if (mkdir("D1", 0777) != 0) e(1);
 518   if ( (fd = creat("D1/x", 0777)) < 0) e(2);
 519   if (close(fd) != 0) e(3);
 520   if ( (fd = creat("D1/y", 0777)) < 0) e(3);
 521   if (close(fd) != 0) e(4);
 522   D1_before = get_link("D1");
 523   x_link = get_link("D1/x");
 524   if (rename("D1/x", "D1/y") != 0) e(5);
 525   y_link = get_link("D1/y");
 526   D1_after = get_link("D1");
 527   if (D1_before != 2) e(6);
 528   if (D1_after != 2) e(7);
 529   if (x_link != 1) e(8);
 530   if (y_link != 1) e(9);
 531   if (access("D1/y", 7) != 0) e(10);
 532   if (unlink("D1/y") != 0) e(11);
 533   if (rmdir("D1") != 0) e(12);
 534 }
 535
 536 void test21l()
 537 {
 538   int fd, D1_before, D1_after, D2_before, D2_after, x_link, y_link;
 539
 540   /* Test case 6: move a file to a new directory. */
 541   subtest = 11;
 542   if (mkdir("D1", 0777) != 0) e(1);
 543   if (mkdir("D2", 0777) != 0) e(2);
 544   if ( (fd = creat("D1/x", 0777)) < 0) e(3);
 545   if (close(fd) != 0) e(4);
 546   if ( (fd = creat("D2/y", 0777)) < 0) e(5);
 547   if (close(fd) != 0) e(6);
 548   D1_before = get_link("D1");
 549   D2_before = get_link("D2");
 550   x_link = get_link("D1/x");
 551   if (rename("D1/x", "D2/y") != 0) e(7);
 552   y_link = get_link("D2/y");
 553   D1_after = get_link("D1");
 554   D2_after = get_link("D2");
 555   if (D1_before != 2) e(8);
 556   if (D2_before != 2) e(9);
 557   if (D1_after != 2) e(10);
 558   if (D2_after != 2) e(11);
 559   if (x_link != 1) e(12);
 560   if (y_link != 1) e(13);
 561   if (access("D2/y", 7) != 0) e(14);
 562   if (unlink("D2/y") != 0) e(15);
 563   if (rmdir("D1") != 0) e(16);
 564   if (rmdir("D2") != 0) e(17);
 565 }
 566
 567 void test21m()
 568 {
 569   int D1_before, D1_after, x_link, y_link;
 570
 571   /* Test case 7: renaming a directory within the same directory. */
 572   subtest = 12;
 573   if (mkdir("D1", 0777) != 0) e(1);
 574   if (mkdir("D1/X", 0777) != 0) e(2);
 575   if (mkdir("D1/Y", 0777) != 0) e(3);
 576   D1_before = get_link("D1");
 577   x_link = get_link("D1/X");
 578   if (rename("D1/X", "D1/Y") != 0) e(4);
 579   y_link = get_link("D1/Y");
 580   D1_after = get_link("D1");
 581   if (D1_before != 4) e(5);
 582   if (D1_after != 3) e(6);
 583   if (x_link != 2) e(7);
 584   if (y_link != 2) e(8);
 585   if (access("D1/Y", 7) != 0) e(9);
 586   if (rmdir("D1/Y") != 0) e(10);
 587   if (get_link("D1") != 2) e(11);
 588   if (rmdir("D1") != 0) e(12);
 589 }
 590
 591 void test21n()
 592 {
 593   int D1_before, D1_after, D2_before, D2_after, x_link, y_link;
 594
 595   /* Test case 8: move a directory to a new directory. */
 596   subtest = 13;
 597   if (mkdir("D1", 0777) != 0) e(1);
 598   if (mkdir("D2", 0777) != 0) e(2);
 599   if (mkdir("D1/X", 0777) != 0) e(3);
 600   if (mkdir("D2/Y", 0777) != 0) e(4);
 601   D1_before = get_link("D1");
 602   D2_before = get_link("D2");
 603   x_link = get_link("D1/X");
 604   if (rename("D1/X", "D2/Y") != 0) e(5);
 605   y_link = get_link("D2/Y");
 606   D1_after = get_link("D1");
 607   D2_after = get_link("D2");
 608   if (D1_before != 3) e(6);
 609   if (D2_before != 3) e(7);
 610   if (D1_after != 2) e(8);
 611   if (D2_after != 3) e(9);
 612   if (x_link != 2) e(10);
 613   if (y_link != 2) e(11);
 614   if (access("D2/Y", 7) != 0) e(12);
 615   if (rename("D2/Y", "D1/Z") != 0) e(13);
 616   if (get_link("D1") != 3) e(14);
 617   if (get_link("D2") != 2) e(15);
 618   if (rmdir("D1/Z") != 0) e(16);
 619   if (get_link("D1") != 2) e(17);
 620   if (rmdir("D1") != 0) e(18);
 621   if (rmdir("D2") != 0) e(19);
 622 }
 623
 624 void test21o()
 625 {
 626   /* Test trying to remove . and .. */
 627   subtest = 14;
 628   if (mkdir("D1", 0777) != 0) e(1);
 629   if (chdir("D1") != 0) e(2);
 630   if (rmdir(".") == 0) e(3);
 631   if (rmdir("..") == 0) e(4);
 632   if (mkdir("D2", 0777) != 0) e(5);
 633   if (mkdir("D3", 0777) != 0) e(6);
 634   if (mkdir("D4", 0777) != 0) e(7);
 635   if (rmdir("D2/../D3/../D4") != 0) e(8);       /* legal way to remove D4 */
 636   if (rmdir("D2/../D3/../D2/..") == 0) e(9);    /* removing self is illegal */
 637   if (rmdir("D2/../D3/../D2/../..") == 0) e(10);/* removing parent is illegal*/
 638   if (rmdir("../D1/../D1/D3") != 0) e(11);      /* legal way to remove D3 */
 639   if (rmdir("./D2/../D2") != 0) e(12);          /* legal way to remove D2 */
 640   if (chdir("..") != 0) e(13);
 641   if (rmdir("D1") != 0) e(14);
 642 }
 643
 644 int get_link(name)
 645 char *name;
 646 {
 647   struct stat statbuf;
 648
 649   if (stat(name, &statbuf) != 0) {
 650         printf("Unable to stat %s\n", name);
 651         errct++;
 652         return(-1);
 653   }
 654   return(statbuf.st_nlink);
 655 }
 656
 657 void e(n)
 658 int n;
 659 {
 660   int err_num = errno;          /* save errno in case printf clobbers it */
 661
 662   printf("Subtest %d,  error %d  errno=%d  ", subtest, n, errno);
 663   errno = err_num;              /* restore errno, just in case */
 664   perror("");
 665   if (errct++ > MAX_ERROR) {
 666         printf("Too many errors; test aborted\n");
 667         chdir("..");
 668         system("rm -rf DIR*");
 669         exit(1);
 670   }
 671 }
 672
 673 void quit()
 674 {
 675   chdir("..");
 676   system("rm -rf DIR*");
 677
 678   if (errct == 0) {
 679         printf("ok\n");
 680         exit(0);
 681   } else {
 682         printf("%d errors\n", errct);
 683         exit(1);
 684   }
 685 }