minix/tests/test25.c

   1 /* test25: open (), close ()    (p) Jan-Mark Wams. email: jms@cs.vu.nl */
   2
   3 /* Not tested: O_NONBLOCK on special files, supporting it.
   4 ** On a read-only file system, some error reports are to be expected.
   5 */
   6
   7 #include <sys/types.h>
   8 #include <sys/stat.h>
   9 #include <sys/wait.h>
  10 #include <stdlib.h>
  11 #include <unistd.h>
  12 #include <string.h>
  13 #include <fcntl.h>
  14 #include <limits.h>
  15 #include <errno.h>
  16 #include <time.h>
  17 #include <stdio.h>
  18
  19 int max_error =         4;
  20 #include "common.h"
  21
  22 #define ITERATIONS      2
  23
  24
  25 #define System(cmd)     if (system(cmd) != 0) printf("``%s'' failed\n", cmd)
  26 #define Chdir(dir)      if (chdir(dir) != 0) printf("Can't goto %s\n", dir)
  27 #define Stat(a,b)       if (stat(a,b) != 0) printf("Can't stat %s\n", a)
  28 #define Creat(f)        if (close(creat(f,0777))!=0) printf("Can't creat %s\n",f)
  29 #define Report(s,n)     printf("Subtest %d" s,subtest,(n))
  30
  31 int subtest = 1;
  32 int superuser;
  33 char *MaxName;                  /* Name of maximum length */
  34 char MaxPath[PATH_MAX];         /* Same for path */
  35 char *ToLongName;               /* Name of maximum +1 length */
  36 char ToLongPath[PATH_MAX + 1];  /* Same for path, both too long */
  37
  38 void test25a(void);
  39 void test25b(void);
  40 void test25c(void);
  41 void test25d(void);
  42 void test25e(void);
  43 void makelongnames(void);
  44
  45 int main(int argc, char *argv[])
  46 {
  47   int i, m = 0xFFFF;
  48
  49   sync();
  50
  51   start(25);
  52   if (argc == 2) m = atoi(argv[1]);
  53   makelongnames();
  54   superuser = (geteuid() == 0);
  55
  56   /* Close all files, the parent might have opened. */
  57   for (i = 3; i < 100; i++) close(i);
  58
  59   for (i = 0; i < ITERATIONS; i++) {
  60         if (m & 001) test25a();
  61         if (m & 002) test25b();
  62         if (m & 004) test25c();
  63         if (m & 010) test25d();
  64         if (m & 020) test25e();
  65   }
  66   quit();
  67
  68   return(-1);   /* Unreachable */
  69 }
  70
  71 void test25a()
  72 {                               /* Test fcntl flags. */
  73   subtest = 1;
  74
  75 #define EXCLUDE(a,b)    (((a)^(b)) == ((a)|(b)))
  76 #define ADDIT           (O_APPEND | O_CREAT | O_EXCL | O_NONBLOCK | O_TRUNC)
  77
  78   /* If this compiles all flags are defined but they have to be or-able. */
  79   if (!(EXCLUDE(O_NONBLOCK, O_TRUNC))) e(1);
  80   if (!(EXCLUDE(O_EXCL, O_NONBLOCK | O_TRUNC))) e(2);
  81   if (!(EXCLUDE(O_CREAT, O_EXCL | O_NONBLOCK | O_TRUNC))) e(3);
  82   if (!(EXCLUDE(O_APPEND, O_CREAT | O_EXCL | O_NONBLOCK | O_TRUNC))) e(4);
  83   if (!(EXCLUDE(O_RDONLY, ADDIT))) e(5);
  84   if (!(EXCLUDE(O_WRONLY, ADDIT))) e(6);
  85   if (!(EXCLUDE(O_RDWR, ADDIT))) e(7);
  86 }
  87
  88 void test25b()
  89 {                               /* Test normal operation. */
  90
  91 #define BUF_SIZE 1024
  92
  93   int fd1, fd2, fd3, fd4, fd5;
  94   char buf[BUF_SIZE];
  95   struct stat st1, st2, st3;
  96   time_t time1, time2;
  97   int stat_loc;
  98
  99   subtest = 2;
 100
 101   System("rm -rf ../DIR_25/*");
 102
 103   System("echo Hello > he");    /* make test files */
 104   System("echo Hello > ha");    /* size 6 bytes */
 105   System("echo Hello > hi");
 106   System("echo Hello > ho");
 107
 108   /* Check path resolution. Check if lowest fds are returned */
 109   if ((fd1 = open("he", O_RDONLY)) != 3) e(1);
 110   if (read(fd1, buf, BUF_SIZE) != 6) e(2);
 111   if ((fd2 = open("./ha", O_RDONLY)) != 4) e(3);
 112   if ((fd3 = open("../DIR_25/he", O_RDWR)) != 5) e(4);
 113   if ((fd4 = open("ho", O_WRONLY)) != 6) e(5);
 114   if (close(fd4) != 0) e(6);
 115   if (close(fd1) != 0) e(7);
 116   if ((fd1 = open("./././ho", O_RDWR)) != 3) e(8);
 117   if ((fd4 = open("../DIR_25/he", O_RDONLY)) != 6) e(9);
 118   if (close(fd2) != 0) e(10);
 119   if (close(fd3) != 0) e(11);
 120   if ((fd2 = open("ha", O_RDONLY)) != 4) e(12);
 121   if ((fd3 = open("/etc/passwd", O_RDONLY)) != 5) e(13);
 122   if (close(fd4) != 0) e(14);   /* close all */
 123   if (close(fd1) != 0) e(15);
 124   if (close(fd3) != 0) e(16);
 125
 126   /* Check if processes share fd2, and if they have independent new fds */
 127   System("rm -rf /tmp/sema.25");
 128   switch (fork()) {
 129       case -1:  printf("Can't fork\n"); break;
 130
 131       case 0:
 132         if ((fd1 = open("he", O_WRONLY)) != 3) e(17);
 133         if ((fd3 = open("../././DIR_25/ha", O_WRONLY)) != 5) e(18);
 134         if ((fd4 = open("../DIR_25/hi", O_WRONLY)) != 6) e(19);
 135         if ((fd5 = open("ho", O_WRONLY)) != 7) e(20);
 136         system("while test ! -f /tmp/sema.25; do sleep 1; done");  /* parent */
 137         if (read(fd2, buf, BUF_SIZE) != 3) e(21);       /* gets Hel */
 138         if (strncmp(buf, "lo\n", 3) != 0) e(22);        /* we get lo */
 139         if (close(fd1) != 0) e(23);
 140         if (close(fd2) != 0) e(24);
 141         if (close(fd3) != 0) e(25);
 142         if (close(fd4) != 0) e(26);
 143         if (close(fd5) != 0) e(27);
 144         exit(0);
 145
 146       default:
 147         if ((fd1 = open("ha", O_RDONLY)) != 3) e(28);
 148         if ((fd3 = open("./he", O_RDONLY)) != 5) e(29);
 149         if ((fd4 = open("../DIR_25/hi", O_RDWR)) != 6) e(30);
 150         if ((fd5 = open("ho", O_WRONLY)) != 7) e(31);
 151         if (close(fd1) != 0) e(32);
 152         if (read(fd2, buf, 3) != 3) e(33);      /* get Hel */
 153         Creat("/tmp/sema.25");
 154         if (strncmp(buf, "Hel", 3) != 0) e(34);
 155         if (close(fd2) != 0) e(35);
 156         if (close(fd3) != 0) e(36);
 157         if (close(fd4) != 0) e(37);
 158         if (close(fd5) != 0) e(38);
 159         if (wait(&stat_loc) == -1) e(39);
 160         if (stat_loc != 0) e(40);
 161   }
 162   System("rm -f /tmp/sema.25");
 163
 164   /* Check if the file status information is updated correctly */
 165   Stat("hi", &st1);             /* get info */
 166   Stat("ha", &st2);             /* of files */
 167   time(&time1);
 168   while (time1 >= time((time_t *)0))
 169         ;                       /* wait a sec */
 170   if ((fd1 = open("hi", O_RDONLY)) != 3) e(41); /* open files */
 171   if ((fd2 = open("ha", O_WRONLY)) != 4) e(42);
 172   if (read(fd1, buf, 1) != 1) e(43);    /* read one */
 173   if (close(fd1) != 0) e(44);   /* close one */
 174   Stat("hi", &st3);             /* get info */
 175   if (st1.st_uid != st3.st_uid) e(45);
 176   if (st1.st_gid != st3.st_gid) e(46);  /* should be same */
 177   if (st1.st_mode != st3.st_mode) e(47);
 178   if (st1.st_size != st3.st_size) e(48);
 179   if (st1.st_nlink != st3.st_nlink) e(49);
 180   if (st1.st_mtime != st3.st_mtime) e(50);
 181   if (st1.st_ctime != st3.st_ctime) e(51);
 182 #ifndef V1_FILESYSTEM
 183   if (st1.st_atime >= st3.st_atime) e(52);      /* except for atime. */
 184 #endif
 185   if (write(fd2, "Howdy\n", 6) != 6) e(53);     /* Update c & mtime. */
 186   if ((fd1 = open("ha", O_RDWR)) != 3) e(54);
 187   if (read(fd1, buf, 6) != 6) e(55);    /* Update atime. */
 188   if (strncmp(buf, "Howdy\n", 6) != 0) e(56);
 189   if (close(fd1) != 0) e(57);
 190   Stat("ha", &st3);
 191   if (st2.st_uid != st3.st_uid) e(58);
 192   if (st2.st_gid != st3.st_gid) e(59);  /* should be same */
 193   if (st2.st_mode != st3.st_mode) e(60);
 194   if (st2.st_nlink != st3.st_nlink) e(61);
 195   if (st2.st_ctime >= st3.st_ctime) e(62);
 196 #ifndef V1_FILESYSTEM
 197   if (st2.st_atime >= st3.st_atime) e(63);
 198 #endif
 199   if (st2.st_mtime >= st3.st_mtime) e(64);
 200   if (st2.st_size != st3.st_size) e(65);
 201   if (close(fd2) != 0) e(66);
 202
 203   /* Let's see if RDONLY files are read only. */
 204   if ((fd1 = open("hi", O_RDONLY)) != 3) e(67);
 205   if (write(fd1, " again", 7) != -1) e(68);     /* we can't write */
 206   if (errno != EBADF) e(69);    /* a read only fd */
 207   if (read(fd1, buf, 7) != 6) e(70);    /* but we can read */
 208   if (close(fd1) != 0) e(71);
 209
 210   /* Let's see if WRONLY files are write only. */
 211   if ((fd1 = open("hi", O_WRONLY)) != 3) e(72);
 212   if (read(fd1, buf, 7) != -1) e(73);   /* we can't read */
 213   if (errno != EBADF) e(74);    /* a write only fd */
 214   if (write(fd1, "hELLO", 6) != 6) e(75);       /* but we can write */
 215   if (close(fd1) != 0) e(76);
 216
 217   /* Let's see if files are closable only once. */
 218   if (close(fd1) != -1) e(77);
 219   if (errno != EBADF) e(78);
 220
 221   /* Let's see how calling close() with bad fds is handled. */
 222   if (close(10) != -1) e(79);
 223   if (errno != EBADF) e(80);
 224   if (close(111) != -1) e(81);
 225   if (errno != EBADF) e(82);
 226   if (close(-432) != -1) e(83);
 227   if (errno != EBADF) e(84);
 228
 229   /* Let's see if RDWR files are read & write able. */
 230   if ((fd1 = open("hi", O_RDWR)) != 3) e(85);
 231   if (read(fd1, buf, 6) != 6) e(86);    /* we can read */
 232   if (strncmp(buf, "hELLO", 6) != 0) e(87);     /* and we can write */
 233   if (write(fd1, "Hello", 6) != 6) e(88);       /* a read write fd */
 234   if (close(fd1) != 0) e(89);
 235
 236   /* Check if APPENDed files are realy appended */
 237   if ((fd1 = open("hi", O_RDWR | O_APPEND)) != 3) e(90);        /* open hi */
 238
 239   /* An open should set the file offset to 0. */
 240   if (lseek(fd1, (off_t) 0, SEEK_CUR) != 0) e(91);
 241
 242   /* Writing 0 bytes should not have an effect. */
 243   if (write(fd1, "", 0) != 0) e(92);
 244   if (lseek(fd1, (off_t) 0, SEEK_CUR) != 0) e(93);      /* the end? */
 245
 246   /* A seek befor a wirte should not matter with O_APPEND. */
 247   Stat("hi", &st1);
 248   if (lseek(fd1, (off_t) - 3, SEEK_END) != st1.st_size - 3) e(94);
 249
 250   /* By writing 1 byte, we force the offset to the end of the file */
 251   if (write(fd1, "1", 1) != 1) e(95);
 252   Stat("hi", &st1);
 253   if (lseek(fd1, (off_t) 0, SEEK_CUR) != st1.st_size) e(96);
 254   if (write(fd1, "2", 1) != 1) e(97);
 255   Stat("hi", &st1);
 256   if (lseek(fd1, (off_t) 0, SEEK_CUR) != st1.st_size) e(98);
 257   if (write(fd1, "3", 1) != 1) e(99);
 258   Stat("hi", &st1);
 259   if (lseek(fd1, (off_t) 0, SEEK_CUR) != st1.st_size) e(100);
 260   if (lseek(fd1, (off_t) - 2, SEEK_CUR) <= 0) e(101);
 261   if (write(fd1, "4", 1) != 1) e(102);
 262
 263   /* Since the mode was O_APPEND, the offset should be reset to EOF */
 264   Stat("hi", &st1);
 265   if (lseek(fd1, (off_t) 0, SEEK_CUR) != st1.st_size) e(103);
 266   if (lseek(fd1, (off_t) - 4, SEEK_CUR) != st1.st_size - 4) e(104);
 267   if (read(fd1, buf, BUF_SIZE) != 4) e(105);
 268   if (strncmp(buf, "1234", 4) != 0) e(106);
 269   if (close(fd1) != 0) e(107);
 270
 271   /* Check the effect of O_CREAT */
 272   Stat("ho", &st1);
 273   fd1 = open("ho", O_RDWR | O_CREAT, 0000);
 274   if (fd1 != 3) e(108);
 275   Stat("ho", &st2);
 276   if (memcmp(&st1, &st2, sizeof(struct stat)) != 0) e(109);
 277   if (read(fd1, buf, 6) != 6) e(110);
 278   if (strncmp(buf, "Hello\n", 6) != 0) e(111);
 279   if (write(fd1, "@", 1) != 1) e(112);
 280   if (close(fd1) != 0) e(113);
 281   (void) umask(0000);
 282   fd1 = open("ho", O_RDWR | O_CREAT | O_EXCL, 0777);
 283   if (fd1 != -1) e(114);        /* ho exists */
 284   System("rm -rf new");
 285   time(&time1);
 286   while (time1 >= time((time_t *)0))
 287         ;
 288   fd1 = open("new", O_RDWR | O_CREAT, 0716);
 289   if (fd1 != 3) e(115);         /* new file */
 290   Stat("new", &st1);
 291   time(&time2);
 292   while (time2 >= time((time_t *)0))
 293         ;
 294   time(&time2);
 295   if (st1.st_uid != geteuid()) e(116);  /* try this as superuser. */
 296   if (st1.st_gid != getegid()) e(117);
 297   if ((st1.st_mode & 0777) != 0716) e(118);
 298   if (st1.st_nlink != 1) e(119);
 299   if (st1.st_mtime <= time1) e(120);
 300   if (st1.st_mtime >= time2) e(121);
 301 #ifndef V1_FILESYSTEM
 302   if (st1.st_atime != st1.st_mtime) e(122);
 303 #endif
 304   if (st1.st_ctime != st1.st_mtime) e(123);
 305   if (st1.st_size != 0) e(124);
 306   if (write(fd1, "I'm new in town", 16) != 16) e(125);
 307   if (lseek(fd1, (off_t) - 5, SEEK_CUR) != 11) e(126);
 308   if (read(fd1, buf, 5) != 5) e(127);
 309   if (strncmp(buf, "town", 5) != 0) e(128);
 310   if (close(fd1) != 0) e(129);
 311
 312   /* Let's test the O_TRUNC flag on this new file. */
 313   time(&time1);
 314   while (time1 >= time((time_t *)0));
 315   if ((fd1 = open("new", O_RDWR | O_TRUNC)) != 3) e(130);
 316   Stat("new", &st1);
 317   time(&time2);
 318   while (time2 >= time((time_t *)0));
 319   time(&time2);
 320   if ((st1.st_mode & 0777) != 0716) e(131);
 321   if (st1.st_size != (size_t) 0) e(132);        /* TRUNCed ? */
 322   if (st1.st_mtime <= time1) e(133);
 323   if (st1.st_mtime >= time2) e(134);
 324   if (st1.st_ctime != st1.st_mtime) e(135);
 325   if (close(fd1) != 0) e(136);
 326
 327   /* Test if file permission bits and the file ownership are unchanged. */
 328   /* So we will see if `O_CREAT' has no effect if the file exists. */
 329   if (superuser) {
 330         System("echo > bar; chmod 077 bar");    /* Make bar 077 */
 331         System("chown daemon bar");
 332         System("chgrp daemon bar");     /* Daemon's bar */
 333         fd1 = open("bar", O_RDWR | O_CREAT | O_TRUNC, 0777);    /* knock knock */
 334         if (fd1 == -1) e(137);
 335         if (write(fd1, "foo", 3) != 3) e(138);  /* rewrite bar */
 336         if (close(fd1) != 0) e(139);
 337         Stat("bar", &st1);
 338         if (st1.st_uid != 1) e(140);    /* bar is still */
 339         if (st1.st_gid != 1) e(141);    /* owned by daemon */
 340         if ((st1.st_mode & 0777) != 077) e(142);        /* mode still is 077 */
 341         if (st1.st_size != (size_t) 3) e(143);  /* 3 bytes long */
 342
 343         /* We do the whole thing again, but with O_WRONLY */
 344         fd1 = open("bar", O_WRONLY | O_CREAT | O_TRUNC, 0777);
 345         if (fd1 == -1) e(144);
 346         if (write(fd1, "foobar", 6) != 6) e(145);       /* rewrite bar */
 347         if (close(fd1) != 0) e(146);
 348         Stat("bar", &st1);
 349         if (st1.st_uid != 1) e(147);    /* bar is still */
 350         if (st1.st_gid != 1) e(148);    /* owned by daemon */
 351         if ((st1.st_mode & 0777) != 077) e(149);        /* mode still is 077 */
 352         if (st1.st_size != (size_t) 6) e(150);  /* 6 bytes long */
 353   }
 354 }
 355
 356 void test25c()
 357 {                               /* Test normal operation Part two. */
 358   int fd1, fd2;
 359   char buf[BUF_SIZE];
 360   struct stat st;
 361   int stat_loc;
 362   static int iteration=0;
 363
 364   subtest = 3;
 365   iteration++;
 366
 367   System("rm -rf ../DIR_25/*");
 368
 369   /* Fifo file test here. */
 370   if (mkfifo("fifo", 0777) != 0) e(1);
 371   switch (fork()) {
 372       case -1:  printf("Can't fork\n"); break;
 373       case 0:
 374         alarm(20);              /* Give child 20 seconds to live. */
 375         if ((fd1 = open("fifo", O_RDONLY)) != 3) e(2);
 376         if (read(fd1, buf, BUF_SIZE) != 23) e(3);
 377         if (strncmp(buf, "1 2 3 testing testing\n", 23) != 0) e(4);
 378         if (close(fd1) != 0) e(5);
 379         exit(0);
 380       default:
 381         if ((fd1 = open("fifo", O_WRONLY)) != 3) e(6);
 382         if (write(fd1, "1 2 3 testing testing\n", 23) != 23) e(7);
 383         if (close(fd1) != 0) e(8);
 384         if (wait(&stat_loc) == -1) e(9);
 385         if (stat_loc != 0) e(10);       /* The alarm went off? */
 386   }
 387
 388   /* Try opening for writing with O_NONBLOCK. */
 389   fd1 = open("fifo", O_WRONLY | O_NONBLOCK);
 390   if (fd1 != -1) e(11);
 391   if (errno != ENXIO) e(12);
 392   close(fd1);
 393
 394   /* Try opening for writing with O_NONBLOCK and O_CREAT. */
 395   fd1 = open("fifo", O_WRONLY | O_CREAT | O_NONBLOCK, 0777);
 396   if (fd1 != -1) e(13);
 397   if (errno != ENXIO) e(14);
 398   close(fd1);
 399
 400   /* Both the NONBLOCK and the EXCLusive give raise to error. */
 401   fd1 = open("fifo", O_WRONLY | O_CREAT | O_EXCL | O_NONBLOCK, 0777);
 402   if (fd1 != -1) e(15);
 403   if (errno != EEXIST && errno != ENXIO) e(16);
 404   close(fd1);                   /* Just in case. */
 405
 406   /* Try opening for reading with O_NONBLOCK. */
 407   fd1 = open("fifo", O_RDONLY | O_NONBLOCK);
 408   if (fd1 != 3) e(17);
 409   if (close(fd1) != 0) e(18);
 410
 411 /* Nopt runs out of memory. ;-< We just cut out some valid code */
 412   /* FIFO's should always append. (They have no file position.) */
 413   switch (fork()) {
 414       case -1:  printf("Can't fork\n"); break;
 415       case 0:
 416         alarm(20);              /* Give child 20 seconds to live. */
 417         if ((fd1 = open("fifo", O_WRONLY)) != 3) e(19);
 418         if ((fd2 = open("fifo", O_WRONLY)) != 4) e(20);
 419         if (write(fd1, "I did see Elvis.\n", 18) != 18) e(21);
 420         if (write(fd2, "I DID.\n", 8) != 8) e(22);
 421         if (close(fd2) != 0) e(23);
 422         if (close(fd1) != 0) e(24);
 423         exit(0);
 424       default:
 425         if ((fd1 = open("fifo", O_RDONLY)) != 3) e(25);
 426         if (read(fd1, buf, 18) != 18) e(26);
 427         if (strncmp(buf, "I did see Elvis.\n", 18) != 0) e(27);
 428         if (read(fd1, buf, BUF_SIZE) != 8) e(28);
 429         if (strncmp(buf, "I DID.\n", 8) != 0) e(29);
 430         if (close(fd1) != 0) e(30);
 431         if (wait(&stat_loc) == -1) e(31);
 432         if (stat_loc != 0) e(32);       /* The alarm went off? */
 433   }
 434
 435   /* O_TRUNC should have no effect on FIFO files. */
 436   switch (fork()) {
 437       case -1:  printf("Can't fork\n"); break;
 438       case 0:
 439         alarm(20);              /* Give child 20 seconds to live. */
 440         if ((fd1 = open("fifo", O_WRONLY)) != 3) e(33);
 441         if (write(fd1, "I did see Elvis.\n", 18) != 18) e(34);
 442         if ((fd2 = open("fifo", O_WRONLY | O_TRUNC)) != 4) e(35);
 443         if (write(fd2, "I DID.\n", 8) != 8) e(36);
 444         if (close(fd2) != 0) e(37);
 445         if (close(fd1) != 0) e(38);
 446         exit(0);
 447       default:
 448         if ((fd1 = open("fifo", O_RDONLY)) != 3) e(39);
 449         if (read(fd1, buf, 18) != 18) e(40);
 450         if (strncmp(buf, "I did see Elvis.\n", 18) != 0) e(41);
 451         if (read(fd1, buf, BUF_SIZE) != 8) e(42);
 452         if (strncmp(buf, "I DID.\n", 8) != 0) e(43);
 453         if (close(fd1) != 0) e(44);
 454         if (wait(&stat_loc) == -1) e(45);
 455         if (stat_loc != 0) e(46);       /* The alarm went off? */
 456   }
 457
 458   /* Closing the last fd should flush all data to the bitbucket. */
 459   System("rm -rf /tmp/sema.25");
 460   switch (fork()) {
 461       case -1:  printf("Can't fork\n"); break;
 462
 463       case 0:
 464         alarm(20);              /* Give child 20 seconds to live. */
 465         if ((fd1 = open("fifo", O_WRONLY)) != 3) e(47);
 466         if (write(fd1, "I did see Elvis.\n", 18) != 18) e(48);
 467         Creat("/tmp/sema.25");
 468         sleep(2);               /* give parent a chance to open */
 469         /* this was sleep(1), but that's too short: child also sleeps(1) */
 470         if (close(fd1) != 0) e(49);
 471         exit(0);
 472
 473       default:
 474         if ((fd1 = open("fifo", O_RDONLY)) != 3) e(50);
 475         /* Make `sure' write has closed. */
 476         while (stat("/tmp/sema.25", &st) != 0) sleep(1);
 477         if (close(fd1) != 0) e(51);
 478         if ((fd1 = open("fifo", O_RDONLY | O_NONBLOCK)) != 3) e(52);
 479         if (read(fd1, buf, BUF_SIZE) != 18) e(53);
 480         if (close(fd1) != 0) e(54);
 481         if (wait(&stat_loc) == -1) e(55);
 482         if (stat_loc != 0) e(56);       /* The alarm went off? */
 483   }
 484
 485   /* Let's try one too many. */
 486   System("rm -rf /tmp/sema.25");
 487   switch (fork()) {
 488       case -1:  printf("Can't fork\n"); break;
 489       case 0:
 490         alarm(20);              /* Give child 20 seconds to live. */
 491         if ((fd1 = open("fifo", O_WRONLY)) != 3) e(57);
 492         if (write(fd1, "I did see Elvis.\n", 18) != 18) e(58);
 493
 494         /* Keep open till third reader is opened. */
 495         while (stat("/tmp/sema.25", &st) != 0) sleep(1);
 496         if (close(fd1) != 0) e(59);
 497         exit(0);
 498       default:
 499         if ((fd1 = open("fifo", O_RDONLY)) != 3) e(60);
 500         if (read(fd1, buf, 2) != 2) e(61);
 501         if (strncmp(buf, "I ", 2) != 0) e(62);
 502         if (close(fd1) != 0) e(63);
 503         if ((fd1 = open("fifo", O_RDONLY)) != 3) e(64);
 504         if (read(fd1, buf, 4) != 4) e(65);
 505         if (strncmp(buf, "did ", 4) != 0) e(66);
 506         if ((fd2 = open("fifo", O_RDONLY)) != 4) e(67);
 507
 508         /* Signal third reader is open. */
 509         Creat("/tmp/sema.25");
 510         if (read(fd2, buf, BUF_SIZE) != 12) e(68);
 511         if (strncmp(buf, "see Elvis.\n", 12) != 0) e(69);
 512         if (close(fd2) != 0) e(70);
 513         if (close(fd1) != 0) e(71);
 514         if (wait(&stat_loc) == -1) e(72);
 515         if (stat_loc != 0) e(73);       /* The alarm went off? */
 516   }
 517   System("rm -rf fifo /tmp/sema.25");
 518
 519   /* O_TRUNC should have no effect on directroys. */
 520   System("mkdir dir; touch dir/f1 dir/f2 dir/f3");
 521   if ((fd1 = open("dir", O_WRONLY | O_TRUNC)) != -1) e(74);
 522   if (errno != EISDIR) e(75);
 523   close(fd1);
 524
 525   /* Opening a directory for reading should be possible. */
 526   if ((fd1 = open("dir", O_RDONLY)) != 3) e(76);
 527   if (close(fd1) != 0) e(77);
 528   if (unlink("dir/f1") != 0) e(78);     /* Should still be there. */
 529   if (unlink("dir/f2") != 0) e(79);
 530   if (unlink("dir/f3") != 0) e(80);
 531   if (rmdir("dir") != 0) e(81);
 532
 533   if (!superuser) {
 534         /* Test if O_CREAT is not usable to open files with the wrong mode */
 535         (void) umask(0200);     /* nono has no */
 536         System("touch nono");   /* write bit */
 537         (void) umask(0000);
 538         fd1 = open("nono", O_RDWR | O_CREAT, 0777);     /* try to open */
 539         if (fd1 != -1) e(82);
 540         if (errno != EACCES) e(83);     /* but no access */
 541   }
 542 }
 543
 544 void test25d()
 545 {
 546   int fd;
 547
 548   subtest = 4;
 549
 550   System("rm -rf ../DIR_25/*");
 551
 552   /* Test maximal file name length. */
 553   if ((fd = open(MaxName, O_RDWR | O_CREAT, 0777)) != 3) e(1);
 554   if (close(fd) != 0) e(2);
 555   MaxPath[strlen(MaxPath) - 2] = '/';
 556   MaxPath[strlen(MaxPath) - 1] = 'a';   /* make ././.../a */
 557   if ((fd = open(MaxPath, O_RDWR | O_CREAT, 0777)) != 3) e(3);
 558   if (close(fd) != 0) e(4);
 559   MaxPath[strlen(MaxPath) - 1] = '/';   /* make ././.../a */
 560 }
 561
 562 void test25e()
 563 {
 564   int fd, does_truncate;
 565   char *noread = "noread";      /* Name for unreadable file. */
 566   char *nowrite = "nowrite";    /* Same for unwritable. */
 567   int stat_loc;
 568
 569   subtest = 5;
 570
 571   System("rm -rf ../DIR_25/*");
 572
 573   mkdir("bar", 0777);           /* make bar */
 574
 575   /* Check if no access on part of path generates the correct error. */
 576   System("chmod 677 bar");      /* rw-rwxrwx */
 577   if (open("bar/nono", O_RDWR | O_CREAT, 0666) != -1) e(1);
 578   if (errno != EACCES) e(2);
 579
 580   /* Ditto for no write permission. */
 581   System("chmod 577 bar");      /* r-xrwxrwx */
 582   if (open("bar/nono", O_RDWR | O_CREAT, 0666) != -1) e(3);
 583   if (errno != EACCES) e(4);
 584
 585   /* Clean up bar. */
 586   System("rm -rf bar");
 587
 588   /* Improper flags set on existing file. */
 589   System("touch noread; chmod 377 noread");     /* noread */
 590   if (open(noread, O_RDONLY) != -1) e(5);
 591   if (open(noread, O_RDWR) != -1) e(6);
 592   if (open(noread, O_RDWR | O_CREAT, 0777) != -1) e(7);
 593   if (open(noread, O_RDWR | O_CREAT | O_TRUNC, 0777) != -1) e(8);
 594   if ((fd = open(noread, O_WRONLY)) != 3) e(9);
 595   if (close(fd) != 0) e(10);
 596   System("touch nowrite; chmod 577 nowrite");   /* nowrite */
 597   if (open(nowrite, O_WRONLY) != -1) e(11);
 598   if (open(nowrite, O_RDWR) != -1) e(12);
 599   if (open(nowrite, O_RDWR | O_CREAT, 0777) != -1) e(13);
 600   if (open(nowrite, O_RDWR | O_CREAT | O_TRUNC, 0777) != -1) e(14);
 601   if ((fd = open(nowrite, O_RDONLY)) != 3) e(15);
 602   if (close(fd) != 0) e(16);
 603   if (superuser) {
 604         /* If we can make a file ownd by some one else, test access again. */
 605         System("chmod 733 noread");
 606         System("chown bin noread");
 607         System("chgrp system noread");
 608         System("chmod 755 nowrite");
 609         System("chown bin nowrite");
 610         System("chgrp system nowrite");
 611         switch (fork()) {
 612             case -1:    printf("Can't fork\n"); break;
 613             case 0:
 614                 setuid(1);
 615                 setgid(1);      /* become daemon */
 616                 if (open(noread, O_RDONLY) != -1) e(17);
 617                 if (open(noread, O_RDWR) != -1) e(18);
 618                 if (open(noread, O_RDWR | O_CREAT, 0777) != -1) e(19);
 619                 fd = open(noread, O_RDWR | O_CREAT | O_TRUNC, 0777);
 620                 if (fd != -1) e(20);
 621                 if ((fd = open(noread, O_WRONLY)) != 3) e(21);
 622                 if (close(fd) != 0) e(22);
 623                 if (open(nowrite, O_WRONLY) != -1) e(23);
 624                 if (open(nowrite, O_RDWR) != -1) e(24);
 625                 if (open(nowrite, O_RDWR | O_CREAT, 0777) != -1) e(25);
 626                 fd = open(nowrite, O_RDWR | O_CREAT | O_TRUNC, 0777);
 627                 if (fd != -1) e(26);
 628                 if ((fd = open(nowrite, O_RDONLY)) != 3) e(27);
 629                 if (close(fd) != 0) e(28);
 630                 exit(0);
 631             default:
 632                 if (wait(&stat_loc) == -1) e(29);
 633         }
 634   }
 635
 636   /* Clean up the noread and nowrite files. */
 637   System("rm -rf noread nowrite");
 638
 639   /* Test the O_EXCL flag. */
 640   System("echo > exists");
 641   if (open("exists", O_RDWR | O_CREAT | O_EXCL, 0777) != -1) e(30);
 642   if (errno != EEXIST) e(31);
 643   if (open("exists", O_RDONLY | O_CREAT | O_EXCL, 0777) != -1) e(32);
 644   if (errno != EEXIST) e(33);
 645   if (open("exists", O_WRONLY | O_CREAT | O_EXCL, 0777) != -1) e(34);
 646   if (errno != EEXIST) e(35);
 647   fd = open("exists", O_RDWR | O_CREAT | O_EXCL | O_TRUNC, 0777);
 648   if (fd != -1) e(36);
 649   if (errno != EEXIST) e(37);
 650   fd = open("exists", O_RDONLY | O_CREAT | O_EXCL | O_TRUNC, 0777);
 651   if (fd != -1) e(38);
 652   if (errno != EEXIST) e(39);
 653   fd = open("exists", O_WRONLY | O_CREAT | O_EXCL | O_TRUNC, 0777);
 654   if (fd != -1) e(40);
 655   if (errno != EEXIST) e(41);
 656
 657   /* open should fail when O_CREAT|O_EXCL are set and a symbolic link names
 658      a file with EEXIST (regardless of link actually works or not) */
 659   if (symlink("exists", "slinktoexists") == -1) e(42);
 660   if (open("slinktoexists", O_RDWR | O_CREAT | O_EXCL, 0777) != -1) e(43);
 661   if (unlink("exists") == -1) e(44);
 662   /* "slinktoexists has become a dangling symlink. open(2) should still fail
 663      with EEXIST */
 664   if (open("slinktoexists", O_RDWR | O_CREAT | O_EXCL, 0777) != -1) e(45);
 665   if (errno != EEXIST) e(46);
 666
 667
 668   /* Test ToLongName and ToLongPath */
 669   does_truncate = does_fs_truncate();
 670   fd = open(ToLongName, O_RDWR | O_CREAT, 0777);
 671   if (does_truncate) {
 672         if (fd == -1) e(47);
 673         if (close(fd) != 0) e(48);
 674   } else {
 675         if (fd != -1) e(49);
 676         (void) close(fd);               /* Just in case */
 677   }
 678
 679   ToLongPath[PATH_MAX - 2] = '/';
 680   ToLongPath[PATH_MAX - 1] = 'a';
 681   if ((fd = open(ToLongPath, O_RDWR | O_CREAT, 0777)) != -1) e(50);
 682   if (errno != ENAMETOOLONG) e(51);
 683   if (close(fd) != -1) e(52);
 684   ToLongPath[PATH_MAX - 1] = '/';
 685 }
 686
 687 void makelongnames()
 688 {
 689   register int i;
 690   int max_name_length;
 691
 692   max_name_length = name_max("."); /* Aka NAME_MAX, but not every FS supports
 693                                     * the same length, hence runtime check */
 694   MaxName = malloc(max_name_length + 1);
 695   ToLongName = malloc(max_name_length + 1 + 1); /* Name of maximum +1 length */
 696   memset(MaxName, 'a', max_name_length);
 697   MaxName[max_name_length] = '\0';
 698
 699   for (i = 0; i < PATH_MAX - 1; i++) {  /* idem path */
 700         MaxPath[i++] = '.';
 701         MaxPath[i] = '/';
 702   }
 703   MaxPath[PATH_MAX - 1] = '\0';
 704
 705   strcpy(ToLongName, MaxName);  /* copy them Max to ToLong */
 706   strcpy(ToLongPath, MaxPath);
 707
 708   ToLongName[max_name_length] = 'a';
 709   ToLongName[max_name_length+1] = '\0';/* extend ToLongName by one too many */
 710   ToLongPath[PATH_MAX - 1] = '/';
 711   ToLongPath[PATH_MAX] = '\0';  /* inc ToLongPath by one */
 712 }
 713