test/test35.c

   1 /* test35: utime()              Author: Jan-Mark Wams (jms@cs.vu.nl) */
   2
   3 #include <sys/types.h>
   4 #include <sys/stat.h>
   5 #include <sys/wait.h>
   6 #include <stdlib.h>
   7 #include <unistd.h>
   8 #include <string.h>
   9 #include <fcntl.h>
  10 #include <limits.h>
  11 #include <utime.h>
  12 #include <errno.h>
  13 #include <time.h>
  14 #include <ctype.h>
  15 #include <stdio.h>
  16
  17 #define MAX_ERROR       1
  18 #define ITERATIONS     10
  19 #define N 100
  20
  21 #include "common.c"
  22
  23 #define System(cmd)   if (system(cmd) != 0) printf("``%s'' failed\n", cmd)
  24 #define Chdir(dir)    if (chdir(dir) != 0) printf("Can't goto %s\n", dir)
  25 #define Stat(a,b)     if (stat(a,b) != 0) printf("Can't stat %s\n", a)
  26 #define Mkfifo(f)     if (mkfifo(f,0777)!=0) printf("Can't make fifo %s\n", f)
  27 #define Mkdir(f)      if (mkdir(f,0777)!=0) printf("Can't make dir %s\n", f)
  28 #define Creat(f)      if (close(creat(f,0777))!=0) printf("Can't creat %s\n",f)
  29 #define Time(t)       if (time(t) == (time_t)-1) printf("Time error\n")
  30 #define Chown(f,u,g)  if (chown(f,u,g) != 0) printf("Can't chown %s\n", f)
  31 #define Chmod(f,m)    if (chmod(f,m) != 0) printf("Can't chmod %s\n", f)
  32
  33 #define PASSWD_FILE     "/etc/passwd"
  34
  35 int I_can_chown;
  36 int superuser;
  37 char *MaxName;                  /* Name of maximum length */
  38 char MaxPath[PATH_MAX];         /* Same for path */
  39 char *NameTooLong;              /* Name of maximum +1 length */
  40 char PathTooLong[PATH_MAX + 1]; /* Same for path, both too long */
  41
  42 void test35a(void);
  43 void test35b(void);
  44 void test35c(void);
  45 void makelongnames(void);
  46 void getids(uid_t * uid, gid_t * gid);
  47
  48 int main(int argc, char *argv[])
  49 {
  50   int i, m = 0xFFFF;
  51
  52   sync();
  53   if (argc == 2) m = atoi(argv[1]);
  54   start(35);
  55   makelongnames();
  56   superuser = (geteuid() == 0);
  57
  58 #ifdef _POSIX_CHOWN_RESTRICTED
  59 # if _POSIX_CHOWN_RESTRICTED - 0 != -1
  60   I_can_chown = superuser;
  61 # else
  62   I_can_chown = 1;
  63 # endif
  64 #else
  65 # include "error, this case requires dynamic checks and is not handled"
  66 #endif
  67
  68   for (i = 0; i < ITERATIONS; i++) {
  69         if (m & 0001) test35a();
  70         if (m & 0002) test35b();
  71         if (m & 0004) test35c();
  72   }
  73   quit();
  74   return 1;
  75 }
  76
  77 void test35a()
  78 {                               /* Test normal operation. */
  79   struct stat st;
  80   struct utimbuf ub;
  81   time_t time1, time2;
  82   int cnt;
  83
  84   subtest = 1;
  85
  86   /* Creat scratch file. */
  87   Creat("foo");
  88
  89   /* Set file times back two seconds. */
  90   Stat("foo", &st);
  91   ub.actime = st.st_atime - 2;
  92   ub.modtime = st.st_mtime - 2;
  93   Time(&time1);
  94   utime("foo", &ub);
  95   Time(&time2);
  96   Stat("foo", &st);
  97   if (ub.actime != st.st_atime) e(1);
  98   if (ub.modtime != st.st_mtime) e(2);
  99
 100   /* The status changed time sould be changed. */
 101 #ifndef V1_FILESYSTEM
 102   if (st.st_ctime < time1) e(3);
 103 #endif
 104   if (st.st_ctime > time2) e(4);
 105
 106   /* Add twenty seconds. */
 107   Stat("foo", &st);
 108   ub.actime = st.st_atime + 20;
 109   ub.modtime = st.st_mtime + 20;
 110   Time(&time1);
 111   utime("foo", &ub);
 112   Time(&time2);
 113   Stat("foo", &st);
 114   if (ub.actime != st.st_atime) e(5);
 115   if (ub.modtime != st.st_mtime) e(6);
 116   if (st.st_ctime < time1) e(7);
 117 #ifndef V1_FILESYSTEM
 118   if (st.st_ctime > time2) e(8);
 119 #endif
 120
 121   /* Try 100 times to do utime in less than one second. */
 122   cnt = 0;
 123   do {
 124         Time(&time1);
 125         utime("foo", (struct utimbuf *) NULL);
 126         Time(&time2);
 127   } while (time1 != time2 && cnt++ < 100);
 128   if (time1 == time2) {
 129         Stat("foo", &st);
 130         Time(&time2);
 131         if (st.st_atime != time1) e(9);
 132         if (st.st_mtime != time1) e(10);
 133   } else {
 134         Stat("foo", &st);
 135         if (st.st_atime > time2) e(11);
 136         if (st.st_mtime > time2) e(12);
 137         Time(&time2);
 138         if (st.st_atime < time1) e(13);
 139         if (st.st_mtime < time1) e(14);
 140   }
 141   if (st.st_ctime < time1) e(15);
 142   if (st.st_ctime > time2) e(16);
 143
 144   System("rm -rf ../DIR_35/*");
 145 }
 146
 147 void test35b()
 148 {
 149   subtest = 2;
 150
 151   /* MaxPath and MaxName checkup. */
 152   Creat(MaxName);
 153   MaxPath[strlen(MaxPath) - 2] = '/';
 154   MaxPath[strlen(MaxPath) - 1] = 'a';   /* make ././.../a */
 155   Creat(MaxPath);
 156   if (utime(MaxName, NULL) != 0) e(1);
 157   if (utime(MaxPath, NULL) != 0) e(2);
 158
 159   /* The owner doesn't need write permisson to set  times. */
 160   Creat("foo");
 161   if (chmod("foo", 0) != 0) e(3);
 162   if (utime("foo", NULL) != 0) e(4);
 163   if (chmod("foo", 0777) != 0) e(5);
 164   if (utime("foo", NULL) != 0) e(6);
 165
 166   System("rm -rf ../DIR_35/*");
 167 }
 168
 169 void test35c()
 170 {
 171   gid_t gid, gid2;
 172   uid_t uid, uid2;
 173   struct utimbuf ub;
 174   int fd, does_truncate, stat_loc;
 175
 176   subtest = 3;
 177
 178   /* Access problems. */
 179   Mkdir("bar");
 180   Creat("bar/tryme");
 181   if (superuser) {
 182         Chmod("bar", 0000);     /* No search permisson at all. */
 183         if (utime("bar/tryme", NULL) != 0) e(1);
 184   }
 185   if (!superuser) {
 186         Chmod("bar", 0677);     /* No search permisson. */
 187         if (utime("bar/tryme", NULL) != -1) e(2);
 188         if (errno != EACCES) e(3);
 189   }
 190   Chmod("bar", 0777);
 191
 192   if (I_can_chown) {
 193         switch (fork()) {
 194             case -1:    printf("Can't fork\n"); break;
 195             case 0:
 196                 alarm(20);
 197
 198                 /* Get two differend non root uids. */
 199                 if (superuser) {
 200                         getids(&uid, &gid);
 201                         if (uid == 0) getids(&uid, &gid);
 202                         if (uid == 0) e(4);
 203                 }
 204                 if (!superuser) {
 205                         uid = geteuid();
 206                         gid = getegid();
 207                 }
 208                 getids(&uid2, &gid);
 209                 if (uid == uid2) getids(&uid2, &gid2);
 210                 if (uid == uid2) e(5);
 211
 212                 /* Creat a number of files for root, user and user2. */
 213                 Creat("rootfile");      /* Owned by root. */
 214                 Chmod("rootfile", 0600);
 215                 Chown("rootfile", 0, 0);
 216                 Creat("user2file");     /* Owned by user 2, writeable. */
 217                 Chmod("user2file", 0020);
 218                 Chown("user2file", uid2, gid);
 219                 Creat("user2private");  /* Owned by user 2, privately. */
 220                 Chmod("user2private", 0600);
 221                 Chown("user2private", uid2, gid);
 222
 223                 if (superuser) {
 224                         setgid(gid);
 225                         setuid(uid);
 226                 }
 227
 228                 /* We now are user ``uid'' from group ``gid''. */
 229                 ub.actime = (time_t) 12345L;
 230                 ub.modtime = (time_t) 12345L;
 231
 232                 if (utime("rootfile", NULL) != -1) e(6);
 233                 if (errno != EACCES) e(7);
 234                 if (utime("rootfile", &ub) != -1) e(8);
 235                 if (errno != EPERM) e(9);
 236
 237                 if (utime("user2file", NULL) != 0) e(10);
 238                 if (utime("user2file", &ub) != -1) e(11);
 239                 if (errno != EPERM) e(12);
 240
 241                 if (utime("user2private", NULL) != -1) e(13);
 242                 if (errno != EACCES) e(14);
 243                 if (utime("user2private", &ub) != -1) e(15);
 244                 if (errno != EPERM) e(16);
 245
 246                 exit(errct ? 1 : 0);
 247             default:
 248                 wait(&stat_loc);
 249                 if (stat_loc != 0) e(17);       /* Alarm? */
 250         }
 251   }
 252
 253   /* Test names that are too long. */
 254   does_truncate = does_fs_truncate();
 255   fd = creat(NameTooLong, 0777);
 256   if (does_truncate) {
 257         if (utime(NameTooLong, NULL) != 0) e(18);
 258   } else {
 259         if (utime(NameTooLong, NULL) != -1) e(19);
 260         if (errno != ENAMETOOLONG) e(20);
 261   }
 262   (void) close(fd);
 263
 264   /* Make PathTooLong contain ././.../a */
 265   PathTooLong[strlen(PathTooLong) - 2] = '/';
 266   PathTooLong[strlen(PathTooLong) - 1] = 'a';
 267   Creat("a");
 268   if (utime(PathTooLong, NULL) != -1) e(21);
 269   if (errno != ENAMETOOLONG) e(22);
 270
 271   /* Non existing file name. */
 272   if (utime("nonexist", NULL) != -1) e(23);
 273   if (errno != ENOENT) e(24);
 274
 275   /* Empty file name. */
 276   if (utime("", NULL) != -1) e(25);
 277   if (errno != ENOENT) e(26);
 278
 279   System("rm -rf ../DIR_35/*");
 280 }
 281
 282 void makelongnames()
 283 {
 284   register int i;
 285   int max_name_length;
 286
 287   max_name_length = name_max("."); /* Aka NAME_MAX, but not every FS supports
 288                                     * the same length, hence runtime check */
 289   MaxName = malloc(max_name_length + 1);
 290   NameTooLong = malloc(max_name_length + 1 + 1); /* Name of maximum +1 length */
 291   memset(MaxName, 'a', max_name_length);
 292   MaxName[max_name_length] = '\0';
 293
 294   for (i = 0; i < PATH_MAX - 1; i++) {  /* idem path */
 295         MaxPath[i++] = '.';
 296         MaxPath[i] = '/';
 297   }
 298   MaxPath[PATH_MAX - 1] = '\0';
 299
 300   strcpy(NameTooLong, MaxName); /* copy them Max to ToLong */
 301   strcpy(PathTooLong, MaxPath);
 302
 303   NameTooLong[max_name_length] = 'a';
 304   NameTooLong[max_name_length+1] = '\0';/* extend ToLongName by one too many */
 305   PathTooLong[PATH_MAX - 1] = '/';
 306   PathTooLong[PATH_MAX] = '\0'; /* inc ToLongPath by one */
 307 }
 308
 309 /* Getids returns a valid uid and gid. Is used PASSWD FILE.
 310 ** It assumes the following format for a passwd file line:
 311 ** <user_name>:<passwd>:<uid>:<gid>:<other_stuff>
 312 ** If no uids and gids can be found, it will only return 0 ids.
 313 */
 314 void getids(r_uid, r_gid)
 315 uid_t *r_uid;
 316 gid_t *r_gid;
 317 {
 318   char line[N];
 319   char *p;
 320   uid_t uid;
 321   gid_t gid;
 322   FILE *fp;
 323   int i;
 324
 325   static uid_t a_uid[N];        /* Array for uids. */
 326   static gid_t a_gid[N];        /* Array for gids. */
 327   static int nuid = 0, ngid = 0;/* The number of user & group ids. */
 328   static int cuid = 0, cgid = 0;/* The current id index. */
 329
 330   /* If we don't have any uids go read some from the passwd file. */
 331   if (nuid == 0) {
 332         a_uid[nuid++] = 0;      /* Root uid and gid. */
 333         a_gid[ngid++] = 0;
 334         if ((fp = fopen(PASSWD_FILE, "r")) == NULL) {
 335                 printf("Can't open ");
 336                 perror(PASSWD_FILE);
 337         }
 338         while (fp != NULL && fgets(line, sizeof(line), fp) != NULL) {
 339                 p = strchr(line, ':');
 340                 if (p != NULL) p = strchr(p + 1, ':');
 341                 if (p != NULL) {
 342                         p++;
 343                         uid = 0;
 344                         while (isdigit(*p)) {
 345                                 uid *= 10;
 346                                 uid += (uid_t) (*p - '0');
 347                                 p++;
 348                         }
 349                         if (*p != ':') continue;
 350                         p++;
 351                         gid = 0;
 352                         while (isdigit(*p)) {
 353                                 gid *= 10;
 354                                 gid += (gid_t) (*p - '0');
 355                                 p++;
 356                         }
 357                         if (*p != ':') continue;
 358                         if (nuid < N) {
 359                                 for (i = 0; i < nuid; i++)
 360                                         if (a_uid[i] == uid) break;
 361                                 if (i == nuid) a_uid[nuid++] = uid;
 362                         }
 363                         if (ngid < N) {
 364                                 for (i = 0; i < ngid; i++)
 365                                         if (a_gid[i] == gid) break;
 366                                 if (i == ngid) a_gid[ngid++] = gid;
 367                         }
 368                         if (nuid >= N && ngid >= N) break;
 369                 }
 370         }
 371         if (fp != NULL) fclose(fp);
 372   }
 373
 374   /* We now have uids and gids in a_uid and a_gid. */
 375   if (cuid >= nuid) cuid = 0;
 376   if (cgid >= ngid) cgid = 0;
 377   *r_uid = a_uid[cuid++];
 378   *r_gid = a_gid[cgid++];
 379 }