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 int max_error = 4;
  14 #include "common.h"
  15
  16 #define ITERATIONS 3
  17
  18
  19 #define System(cmd)     if (system(cmd) != 0) printf("``%s'' failed\n", cmd)
  20 #define Chdir(dir)      if (chdir(dir) != 0) printf("Can't goto %s\n", dir)
  21
  22 int subtest;
  23 int superuser;                  /* True if we are root. */
  24
  25 char cwd[PATH_MAX];             /* Space for path names. */
  26 char cwd2[PATH_MAX];
  27 char buf[PATH_MAX];
  28 char *MaxName;                  /* Name of maximum length */
  29 char MaxPath[PATH_MAX];         /* Same for path */
  30 char *ToLongName;               /* Name of maximum +1 length */
  31 char ToLongPath[PATH_MAX + 1];  /* Same for path, both too long */
  32
  33 void test23a(void);
  34 void test23b(void);
  35 void test23c(void);
  36 void makelongnames(void);
  37
  38 int main(int argc, char *argv[])
  39 {
  40   int i, m = 0xFFFF;
  41
  42   sync();
  43   if (argc == 2) m = atoi(argv[1]);
  44   start(23);
  45   makelongnames();
  46   superuser = (geteuid() == 0);
  47
  48   for (i = 0; i < ITERATIONS; i++) {
  49         if (m & 0001) test23a();        /* Test normal operation */
  50         if (m & 0002) test23b();        /* Test critical operation */
  51         if (m & 0004) test23c();        /* Test error operation */
  52   }
  53
  54   quit();
  55   return 1;
  56 }
  57
  58 void test23a()
  59 {                               /* Test normal operation. */
  60   register int i;
  61
  62   subtest = 1;
  63
  64   System("rm -rf ../DIR_23/*");
  65
  66   /* Let's do some fiddeling with path names. */
  67   if (getcwd(cwd, PATH_MAX) != cwd) e(1);
  68   if (chdir(cwd) != 0) e(2);
  69   if (getcwd(buf, PATH_MAX) != buf) e(3);
  70   if (strcmp(buf, cwd) != 0) e(4);
  71   if (chdir(".") != 0) e(5);
  72   if (getcwd(buf, PATH_MAX) != buf) e(6);
  73   if (strcmp(buf, cwd) != 0) e(7);
  74   if (chdir("./././.") != 0) e(8);
  75   if (getcwd(buf, PATH_MAX) != buf) e(9);
  76   if (strcmp(buf, cwd) != 0) e(10);
  77
  78   /* Creat a working dir named "foo", remove any previous residues. */
  79   System("rm -rf foo");
  80   if (mkdir("foo", 0777) != 0) e(11);
  81
  82   /* Do some more fiddeling with path names. */
  83   if (chdir("foo/.././foo/..") != 0) e(12);     /* change to cwd */
  84   if (getcwd(buf, PATH_MAX) != buf) e(13);
  85   if (strcmp(buf, cwd) != 0) e(13);
  86   if (chdir("foo") != 0) e(14); /* change to foo */
  87   if (chdir("..") != 0) e(15);  /* and back again */
  88   if (getcwd(buf, PATH_MAX) != buf) e(16);
  89   if (strcmp(buf, cwd) != 0) e(17);
  90
  91   /* Make 30 sub dirs, eg. ./bar/bar/bar/bar/bar...... */
  92   System("rm -rf bar");         /* get ridd of bar */
  93   for (i = 0; i < 30; i++) {
  94         if (mkdir("bar", 0777) != 0) e(18);
  95         if (chdir("bar") != 0) e(19);   /* change to bar */
  96   }
  97   for (i = 0; i < 30; i++) {
  98         if (chdir("..") != 0) e(20);    /* and back again */
  99         if (rmdir("bar") != 0) e(21);
 100   }
 101
 102   /* Make sure we are back where we started. */
 103   if (getcwd(buf, PATH_MAX) != buf) e(22);
 104   if (strcmp(buf, cwd) != 0) e(23);
 105   System("rm -rf bar");         /* just incase */
 106
 107   /* Do some normal checks on `Chdir()' and `getcwd()' */
 108   if (chdir("/") != 0) e(24);
 109   if (getcwd(buf, PATH_MAX) != buf) e(25);
 110   if (strcmp(buf, "/") != 0) e(26);
 111   if (chdir("..") != 0) e(27);  /* go to parent of / */
 112   if (getcwd(buf, PATH_MAX) != buf) e(28);
 113   if (strcmp(buf, "/") != 0) e(29);
 114   if (chdir(cwd) != 0) e(30);
 115   if (getcwd(buf, PATH_MAX) != buf) e(31);
 116   if (strcmp(buf, cwd) != 0) e(32);
 117   if (chdir("/etc") != 0) e(33);        /* /etc might be on RAM */
 118   if (getcwd(buf, PATH_MAX) != buf) e(34);      /* might make a difference */
 119   if (strcmp(buf, "/etc") != 0) e(35);
 120   if (chdir(cwd) != 0) e(36);
 121   if (getcwd(buf, PATH_MAX) != buf) e(37);
 122   if (strcmp(buf, cwd) != 0) e(38);
 123   if (chdir(".//.//") != 0) e(39);      /* .//.// == current dir */
 124   if (getcwd(buf, PATH_MAX) != buf) e(40);
 125   if (strcmp(buf, cwd) != 0) e(41);     /* we might be at '/' */
 126   System("rm -rf foo");
 127 }
 128
 129 void test23b()
 130 {                               /* Test critical values. */
 131   int does_truncate;
 132   subtest = 2;
 133
 134   System("rm -rf ../DIR_23/*");
 135
 136   /* Fiddle with the size (2nd) parameter of `getcwd ()'. */
 137   if (getcwd(cwd, PATH_MAX) != cwd) e(1);       /* get cwd */
 138   if (getcwd(buf, strlen(cwd)) != (char *) 0) e(2);   /* size 1 to small */
 139   if (errno != ERANGE) e(3);
 140   if (getcwd(buf, PATH_MAX) != buf) e(4);
 141   if (strcmp(buf, cwd) != 0) e(5);
 142   Chdir(cwd);                   /* getcwd might cd / */
 143   if (getcwd(buf, strlen(cwd) + 1) != buf) e(6);        /* size just ok */
 144   if (getcwd(buf, PATH_MAX) != buf) e(7);
 145   if (strcmp(buf, cwd) != 0) e(8);
 146
 147   /* Let's see how "MaxName" and "ToLongName" are handled. */
 148   if (mkdir(MaxName, 0777) != 0) e(9);
 149   if (chdir(MaxName) != 0) e(10);
 150   if (chdir("..") != 0) e(11);
 151   if (rmdir(MaxName) != 0) e(12);
 152   if (getcwd(buf, PATH_MAX) != buf) e(13);
 153   if (strcmp(buf, cwd) != 0) e(14);
 154   if (chdir(MaxPath) != 0) e(15);
 155   if (getcwd(buf, PATH_MAX) != buf) e(16);
 156   if (strcmp(buf, cwd) != 0) e(17);
 157
 158   does_truncate = does_fs_truncate();
 159   if (chdir(ToLongName) != -1) e(18);
 160   if (does_truncate) {
 161         if (errno != ENOENT) e(19);
 162   } else {
 163         if (errno != ENAMETOOLONG) e(20);
 164   }
 165
 166   if (getcwd(buf, PATH_MAX) != buf) e(21);
 167   if (strcmp(buf, cwd) != 0) e(22);
 168   if (chdir(ToLongPath) != -1) e(23);
 169   if (errno != ENAMETOOLONG) e(24);
 170   if (getcwd(buf, PATH_MAX) != buf) e(25);
 171   if (strcmp(buf, cwd) != 0) e(26);
 172 }
 173
 174 void test23c()
 175 {                               /* Check reaction to errors */
 176   subtest = 3;
 177
 178   System("rm -rf ../DIR_23/*");
 179
 180   if (getcwd(cwd, PATH_MAX) != cwd) e(1);       /* get cwd */
 181
 182   /* Creat a working dir named "foo", remove any previous residues. */
 183   System("rm -rf foo; mkdir foo");
 184
 185   /* Check some obviouse errors. */
 186   if (chdir("") != -1) e(2);
 187   if (errno != ENOENT) e(3);
 188   if (getcwd(buf, PATH_MAX) != buf) e(4);
 189   if (strcmp(buf, cwd) != 0) e(5);
 190   if (getcwd(buf, 0) != (char *) 0) e(6);
 191   if (errno != EINVAL) e(7);
 192   if (getcwd(buf, PATH_MAX) != buf) e(8);
 193   if (strcmp(buf, cwd) != 0) e(9);
 194   if (getcwd(buf, 0) != (char *) 0) e(10);
 195   if (errno != EINVAL) e(11);
 196   if (getcwd(buf, PATH_MAX) != buf) e(12);
 197   if (strcmp(buf, cwd) != 0) e(13);
 198   if (chdir(cwd) != 0) e(14);   /* getcwd might be buggy. */
 199
 200   /* Change the mode of foo, and check the effect. */
 201   if (chdir("foo") != 0) e(15); /* change to foo */
 202   if (mkdir("bar", 0777) != 0) e(16);   /* make a new dir bar */
 203   if (getcwd(cwd2, PATH_MAX) != cwd2) e(17);    /* get the new cwd */
 204   if (getcwd(buf, 3) != (char *) 0) e(18);      /* size is too small */
 205   if (errno != ERANGE) e(19);
 206   if (getcwd(buf, PATH_MAX) != buf) e(20);
 207   if (strcmp(buf, cwd2) != 0) e(21);
 208   Chdir(cwd2);                  /* getcwd() might cd / */
 209   System("chmod 377 .");        /* make foo unreadable */
 210   if (getcwd(buf, PATH_MAX) != buf) e(22);      /* dir not readable */
 211   if (getcwd(buf, PATH_MAX) != buf) e(23);
 212   if (strcmp(buf, cwd2) != 0) e(24);
 213   if (chdir("bar") != 0) e(25); /* at .../foo/bar */
 214   if (!superuser) {
 215         if (getcwd(buf, PATH_MAX) != (char *) 0) e(26);
 216         if (errno != EACCES) e(27);
 217   }
 218   if (superuser) {
 219         if (getcwd(buf, PATH_MAX) != buf) e(28);
 220   }
 221   if (chdir(cwd2) != 0) e(29);
 222   if (getcwd(buf, PATH_MAX) != buf) e(30);
 223   if (strcmp(buf, cwd2) != 0) e(31);
 224   System("chmod 677 .");        /* make foo inaccessable */
 225   if (!superuser) {
 226         if (getcwd(buf, PATH_MAX) != (char *) 0) e(32); /* try to get cwd */
 227         if (errno != EACCES) e(33);     /* but no access */
 228         if (chdir("..") != -1) e(34);   /* try to get back */
 229         if (errno != EACCES) e(35);     /* again no access */
 230         if (chdir(cwd) != 0) e(36);     /* get back to cwd */
 231         /* `Chdir()' might do path optimizing, it shouldn't. */
 232         if (chdir("foo/..") != -1) e(37);       /* no op */
 233         if (chdir("foo") != -1) e(38);  /* try to cd to foo */
 234         if (errno != EACCES) e(39);     /* no have access */
 235         if (getcwd(buf, PATH_MAX) != buf) e(40);
 236         if (strcmp(buf, cwd) != 0) e(41);
 237   }
 238   if (superuser) {
 239         if (getcwd(buf, PATH_MAX) != buf) e(42);
 240         if (strcmp(buf, cwd2) != 0) e(43);
 241         if (chdir("..") != 0) e(44);    /* get back to cwd */
 242         if (chdir("foo") != 0) e(45);   /* get back to foo */
 243         if (chdir(cwd) != 0) e(46);     /* get back to cwd */
 244   }
 245   if (getcwd(buf, PATH_MAX) != buf) e(47);      /* check we are */
 246   if (strcmp(buf, cwd) != 0) e(48);     /* back at cwd. */
 247   Chdir(cwd);                   /* just in case... */
 248
 249   if (chdir("/etc/passwd") != -1) e(49);        /* try to change to a file */
 250   if (errno != ENOTDIR) e(50);
 251   if (getcwd(buf, PATH_MAX) != buf) e(51);
 252   if (strcmp(buf, cwd) != 0) e(52);
 253   if (chdir("/notexist") != -1) e(53);
 254   if (errno != ENOENT) e(54);
 255   if (getcwd(buf, PATH_MAX) != buf) e(55);
 256   if (strcmp(buf, cwd) != 0) e(56);
 257   System("chmod 777 foo");
 258   if (chdir("foo") != 0) e(57);
 259
 260   /* XXX - this comment was botched by 'pretty'. */
 261   /* * Since `foo' is the cwd, it should not be removeable but * if it
 262    * were, this code would be found here; *
 263    *
 264    *  System ("cd .. ; rm -rf foo");    remove foo *  if (chdir (".")
 265    * != -1) e();                try go to. *  if (errno != ENOENT) e();
 266    * hould not be an entry *  if (chdir ("..") != -1) e();      try
 267    * to get back *  if (errno != ENOENT) e();           should not be
 268    * an entry *  if (getcwd (buf, PATH_MAX) != (char *)0) e(); don't
 269    * know where we are *
 270    *
 271    * What should errno be now ? The cwd might be gone if te superuser *
 272    * removed the cwd. (Might even have linked it first.) But this *
 273    * testing should be done by the test program for `rmdir()'. */
 274   if (chdir(cwd) != 0) e(58);
 275 }
 276
 277 void makelongnames()
 278 {
 279   register int i;
 280   int max_name_length;
 281
 282   max_name_length = name_max("."); /* Aka NAME_MAX, but not every FS supports
 283                                     * the same length, hence runtime check */
 284   MaxName = malloc(max_name_length + 1);
 285   ToLongName = malloc(max_name_length + 1 + 1); /* Name of maximum +1 length */
 286   memset(MaxName, 'a', max_name_length);
 287   MaxName[max_name_length] = '\0';
 288
 289   for (i = 0; i < PATH_MAX - 1; i++) {  /* idem path */
 290         MaxPath[i++] = '.';
 291         MaxPath[i] = '/';
 292   }
 293   MaxPath[PATH_MAX - 1] = '\0';
 294
 295   strcpy(ToLongName, MaxName);  /* copy them Max to ToLong */
 296   strcpy(ToLongPath, MaxPath);
 297
 298   ToLongName[max_name_length] = 'a';
 299   ToLongName[max_name_length+1] = '\0';/* extend ToLongName by one too many */
 300   ToLongPath[PATH_MAX - 1] = '/';
 301   ToLongPath[PATH_MAX] = '\0';  /* inc ToLongPath by one */
 302 }
 303