test/test23.c

   1 /* test23: chdir(), getcwd()    Author: Jan-Mark Wams (jms@cs.vu.nl) */
   2
   3 #include <sys/types.h>
   4 #include <sys/stat.h>
   5 #include <limits.h>
   6 #include <errno.h>
   7 #include <unistd.h>
   8 #include <stdlib.h>
   9 #include <string.h>
  10 #include <fcntl.h>
  11 #include <stdio.h>
  12
  13 #define MAX_ERROR 4
  14 #define ITERATIONS 3
  15
  16 #include "common.c"
  17
  18 #define System(cmd)     if (system(cmd) != 0) printf("``%s'' failed\n", cmd)
  19 #define Chdir(dir)      if (chdir(dir) != 0) printf("Can't goto %s\n", dir)
  20
  21 int subtest;
  22 int superuser;                  /* True if we are root. */
  23
  24 char cwd[PATH_MAX];             /* Space for path names. */
  25 char cwd2[PATH_MAX];
  26 char buf[PATH_MAX];
  27 char *MaxName;                  /* Name of maximum length */
  28 char MaxPath[PATH_MAX];         /* Same for path */
  29 char *ToLongName;               /* Name of maximum +1 length */
  30 char ToLongPath[PATH_MAX + 1];  /* Same for path, both too long */
  31
  32 void test23a(void);
  33 void test23b(void);
  34 void test23c(void);
  35 void makelongnames(void);
  36
  37 int main(int argc, char *argv[])
  38 {
  39   int i, m = 0xFFFF;
  40
  41   sync();
  42   if (argc == 2) m = atoi(argv[1]);
  43   start(23);
  44   makelongnames();
  45   superuser = (geteuid() == 0);
  46
  47   for (i = 0; i < ITERATIONS; i++) {
  48         if (m & 0001) test23a();        /* Test normal operation */
  49         if (m & 0002) test23b();        /* Test critical operation */
  50         if (m & 0004) test23c();        /* Test error operation */
  51   }
  52
  53   quit();
  54   return 1;
  55 }
  56
  57 void test23a()
  58 {                               /* Test normal operation. */
  59   register int i;
  60
  61   subtest = 1;
  62
  63   System("rm -rf ../DIR_23/*");
  64
  65   /* Let's do some fiddeling with path names. */
  66   if (getcwd(cwd, PATH_MAX) != cwd) e(1);
  67   if (chdir(cwd) != 0) e(2);
  68   if (getcwd(buf, PATH_MAX) != buf) e(3);
  69   if (strcmp(buf, cwd) != 0) e(4);
  70   if (chdir(".") != 0) e(5);
  71   if (getcwd(buf, PATH_MAX) != buf) e(6);
  72   if (strcmp(buf, cwd) != 0) e(7);
  73   if (chdir("./././.") != 0) e(8);
  74   if (getcwd(buf, PATH_MAX) != buf) e(9);
  75   if (strcmp(buf, cwd) != 0) e(10);
  76
  77   /* Creat a working dir named "foo", remove any previous residues. */
  78   System("rm -rf foo");
  79   if (mkdir("foo", 0777) != 0) e(11);
  80
  81   /* Do some more fiddeling with path names. */
  82   if (chdir("foo/.././foo/..") != 0) e(12);     /* change to cwd */
  83   if (getcwd(buf, PATH_MAX) != buf) e(13);
  84   if (strcmp(buf, cwd) != 0) e(13);
  85   if (chdir("foo") != 0) e(14); /* change to foo */
  86   if (chdir("..") != 0) e(15);  /* and back again */
  87   if (getcwd(buf, PATH_MAX) != buf) e(16);
  88   if (strcmp(buf, cwd) != 0) e(17);
  89
  90   /* Make 30 sub dirs, eg. ./bar/bar/bar/bar/bar...... */
  91   System("rm -rf bar");         /* get ridd of bar */
  92   for (i = 0; i < 30; i++) {
  93         if (mkdir("bar", 0777) != 0) e(18);
  94         if (chdir("bar") != 0) e(19);   /* change to bar */
  95   }
  96   for (i = 0; i < 30; i++) {
  97         if (chdir("..") != 0) e(20);    /* and back again */
  98         if (rmdir("bar") != 0) e(21);
  99   }
 100
 101   /* Make sure we are back where we started. */
 102   if (getcwd(buf, PATH_MAX) != buf) e(22);
 103   if (strcmp(buf, cwd) != 0) e(23);
 104   System("rm -rf bar");         /* just incase */
 105
 106   /* Do some normal checks on `Chdir()' and `getcwd()' */
 107   if (chdir("/") != 0) e(24);
 108   if (getcwd(buf, PATH_MAX) != buf) e(25);
 109   if (strcmp(buf, "/") != 0) e(26);
 110   if (chdir("..") != 0) e(27);  /* go to parent of / */
 111   if (getcwd(buf, PATH_MAX) != buf) e(28);
 112   if (strcmp(buf, "/") != 0) e(29);
 113   if (chdir(cwd) != 0) e(30);
 114   if (getcwd(buf, PATH_MAX) != buf) e(31);
 115   if (strcmp(buf, cwd) != 0) e(32);
 116   if (chdir("/etc") != 0) e(33);        /* /etc might be on RAM */
 117   if (getcwd(buf, PATH_MAX) != buf) e(34);      /* might make a difference */
 118   if (strcmp(buf, "/etc") != 0) e(35);
 119   if (chdir(cwd) != 0) e(36);
 120   if (getcwd(buf, PATH_MAX) != buf) e(37);
 121   if (strcmp(buf, cwd) != 0) e(38);
 122   if (chdir(".//.//") != 0) e(39);      /* .//.// == current dir */
 123   if (getcwd(buf, PATH_MAX) != buf) e(40);
 124   if (strcmp(buf, cwd) != 0) e(41);     /* we might be at '/' */
 125   System("rm -rf foo");
 126 }
 127
 128 void test23b()
 129 {                               /* Test critical values. */
 130   int does_truncate;
 131   subtest = 2;
 132
 133   System("rm -rf ../DIR_23/*");
 134
 135   /* Fiddle with the size (2nd) parameter of `getcwd ()'. */
 136   if (getcwd(cwd, PATH_MAX) != cwd) e(1);       /* get cwd */
 137   if (getcwd(buf, strlen(cwd)) != (char *) 0) e(2);   /* size 1 to small */
 138   if (errno != ERANGE) e(3);
 139   if (getcwd(buf, PATH_MAX) != buf) e(4);
 140   if (strcmp(buf, cwd) != 0) e(5);
 141   Chdir(cwd);                   /* getcwd might cd / */
 142   if (getcwd(buf, strlen(cwd) + 1) != buf) e(6);        /* size just ok */
 143   if (getcwd(buf, PATH_MAX) != buf) e(7);
 144   if (strcmp(buf, cwd) != 0) e(8);
 145
 146   /* Let's see how "MaxName" and "ToLongName" are handled. */
 147   if (mkdir(MaxName, 0777) != 0) e(9);
 148   if (chdir(MaxName) != 0) e(10);
 149   if (chdir("..") != 0) e(11);
 150   if (rmdir(MaxName) != 0) e(12);
 151   if (getcwd(buf, PATH_MAX) != buf) e(13);
 152   if (strcmp(buf, cwd) != 0) e(14);
 153   if (chdir(MaxPath) != 0) e(15);
 154   if (getcwd(buf, PATH_MAX) != buf) e(16);
 155   if (strcmp(buf, cwd) != 0) e(17);
 156
 157   does_truncate = does_fs_truncate();
 158   if (chdir(ToLongName) != -1) e(18);
 159   if (does_truncate) {
 160         if (errno != ENOENT) e(19);
 161   } else {
 162         if (errno != ENAMETOOLONG) e(20);
 163   }
 164
 165   if (getcwd(buf, PATH_MAX) != buf) e(21);
 166   if (strcmp(buf, cwd) != 0) e(22);
 167   if (chdir(ToLongPath) != -1) e(23);
 168   if (errno != ENAMETOOLONG) e(24);
 169   if (getcwd(buf, PATH_MAX) != buf) e(25);
 170   if (strcmp(buf, cwd) != 0) e(26);
 171 }
 172
 173 void test23c()
 174 {                               /* Check reaction to errors */
 175   subtest = 3;
 176
 177   System("rm -rf ../DIR_23/*");
 178
 179   if (getcwd(cwd, PATH_MAX) != cwd) e(1);       /* get cwd */
 180
 181   /* Creat a working dir named "foo", remove any previous residues. */
 182   System("rm -rf foo; mkdir foo");
 183
 184   /* Check some obviouse errors. */
 185   if (chdir("") != -1) e(2);
 186   if (errno != ENOENT) e(3);
 187   if (getcwd(buf, PATH_MAX) != buf) e(4);
 188   if (strcmp(buf, cwd) != 0) e(5);
 189   if (getcwd(buf, 0) != (char *) 0) e(6);
 190   if (errno != EINVAL) e(7);
 191   if (getcwd(buf, PATH_MAX) != buf) e(8);
 192   if (strcmp(buf, cwd) != 0) e(9);
 193   if (getcwd(buf, 0) != (char *) 0) e(10);
 194   if (errno != EINVAL) e(11);
 195   if (getcwd(buf, PATH_MAX) != buf) e(12);
 196   if (strcmp(buf, cwd) != 0) e(13);
 197   if (chdir(cwd) != 0) e(14);   /* getcwd might be buggy. */
 198
 199   /* Change the mode of foo, and check the effect. */
 200   if (chdir("foo") != 0) e(15); /* change to foo */
 201   if (mkdir("bar", 0777) != 0) e(16);   /* make a new dir bar */
 202   if (getcwd(cwd2, PATH_MAX) != cwd2) e(17);    /* get the new cwd */
 203   if (getcwd(buf, 3) != (char *) 0) e(18);      /* size is too small */
 204   if (errno != ERANGE) e(19);
 205   if (getcwd(buf, PATH_MAX) != buf) e(20);
 206   if (strcmp(buf, cwd2) != 0) e(21);
 207   Chdir(cwd2);                  /* getcwd() might cd / */
 208   System("chmod 377 .");        /* make foo unreadable */
 209   if (getcwd(buf, PATH_MAX) != buf) e(22);      /* dir not readable */
 210   if (getcwd(buf, PATH_MAX) != buf) e(23);
 211   if (strcmp(buf, cwd2) != 0) e(24);
 212   if (chdir("bar") != 0) e(25); /* at .../foo/bar */
 213   if (!superuser) {
 214         if (getcwd(buf, PATH_MAX) != (char *) 0) e(26);
 215         if (errno != EACCES) e(27);
 216   }
 217   if (superuser) {
 218         if (getcwd(buf, PATH_MAX) != buf) e(28);
 219   }
 220   if (chdir(cwd2) != 0) e(29);
 221   if (getcwd(buf, PATH_MAX) != buf) e(30);
 222   if (strcmp(buf, cwd2) != 0) e(31);
 223   System("chmod 677 .");        /* make foo inaccessable */
 224   if (!superuser) {
 225         if (getcwd(buf, PATH_MAX) != (char *) 0) e(32); /* try to get cwd */
 226         if (errno != EACCES) e(33);     /* but no access */
 227         if (chdir("..") != -1) e(34);   /* try to get back */
 228         if (errno != EACCES) e(35);     /* again no access */
 229         if (chdir(cwd) != 0) e(36);     /* get back to cwd */
 230         /* `Chdir()' might do path optimizing, it shouldn't. */
 231         if (chdir("foo/..") != -1) e(37);       /* no op */
 232         if (chdir("foo") != -1) e(38);  /* try to cd to foo */
 233         if (errno != EACCES) e(39);     /* no have access */
 234         if (getcwd(buf, PATH_MAX) != buf) e(40);
 235         if (strcmp(buf, cwd) != 0) e(41);
 236   }
 237   if (superuser) {
 238         if (getcwd(buf, PATH_MAX) != buf) e(42);
 239         if (strcmp(buf, cwd2) != 0) e(43);
 240         if (chdir("..") != 0) e(44);    /* get back to cwd */
 241         if (chdir("foo") != 0) e(45);   /* get back to foo */
 242         if (chdir(cwd) != 0) e(46);     /* get back to cwd */
 243   }
 244   if (getcwd(buf, PATH_MAX) != buf) e(47);      /* check we are */
 245   if (strcmp(buf, cwd) != 0) e(48);     /* back at cwd. */
 246   Chdir(cwd);                   /* just in case... */
 247
 248   if (chdir("/etc/passwd") != -1) e(49);        /* try to change to a file */
 249   if (errno != ENOTDIR) e(50);
 250   if (getcwd(buf, PATH_MAX) != buf) e(51);
 251   if (strcmp(buf, cwd) != 0) e(52);
 252   if (chdir("/notexist") != -1) e(53);
 253   if (errno != ENOENT) e(54);
 254   if (getcwd(buf, PATH_MAX) != buf) e(55);
 255   if (strcmp(buf, cwd) != 0) e(56);
 256   System("chmod 777 foo");
 257   if (chdir("foo") != 0) e(57);
 258
 259   /* XXX - this comment was botched by 'pretty'. */
 260   /* * Since `foo' is the cwd, it should not be removeable but * if it
 261    * were, this code would be found here; *
 262    *
 263    *  System ("cd .. ; rm -rf foo");    remove foo *  if (chdir (".")
 264    * != -1) e();                try go to. *  if (errno != ENOENT) e();
 265    * hould not be an entry *  if (chdir ("..") != -1) e();      try
 266    * to get back *  if (errno != ENOENT) e();           should not be
 267    * an entry *  if (getcwd (buf, PATH_MAX) != (char *)0) e(); don't
 268    * know where we are *
 269    *
 270    * What should errno be now ? The cwd might be gone if te superuser *
 271    * removed the cwd. (Might even have linked it first.) But this *
 272    * testing should be done by the test program for `rmdir()'. */
 273   if (chdir(cwd) != 0) e(58);
 274 }
 275
 276 void makelongnames()
 277 {
 278   register int i;
 279   int max_name_length;
 280
 281   max_name_length = name_max("."); /* Aka NAME_MAX, but not every FS supports
 282                                     * the same length, hence runtime check */
 283   MaxName = malloc(max_name_length + 1);
 284   ToLongName = malloc(max_name_length + 1 + 1); /* Name of maximum +1 length */
 285   memset(MaxName, 'a', max_name_length);
 286   MaxName[max_name_length] = '\0';
 287
 288   for (i = 0; i < PATH_MAX - 1; i++) {  /* idem path */
 289         MaxPath[i++] = '.';
 290         MaxPath[i] = '/';
 291   }
 292   MaxPath[PATH_MAX - 1] = '\0';
 293
 294   strcpy(ToLongName, MaxName);  /* copy them Max to ToLong */
 295   strcpy(ToLongPath, MaxPath);
 296
 297   ToLongName[max_name_length] = 'a';
 298   ToLongName[max_name_length+1] = '\0';/* extend ToLongName by one too many */
 299   ToLongPath[PATH_MAX - 1] = '/';
 300   ToLongPath[PATH_MAX] = '\0';  /* inc ToLongPath by one */
 301 }
 302