io/tst-renameat.c

   1 #include <dirent.h>
   2 #include <fcntl.h>
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5 #include <string.h>
   6 #include <unistd.h>
   7 #include <sys/stat.h>
   8
   9
  10 static void prepare (void);
  11 #define PREPARE(argc, argv) prepare ()
  12
  13 static int do_test (void);
  14 #define TEST_FUNCTION do_test ()
  15
  16 #include "../test-skeleton.c"
  17
  18 static int dir_fd;
  19
  20 static void
  21 prepare (void)
  22 {
  23   size_t test_dir_len = strlen (test_dir);
  24   static const char dir_name[] = "/tst-renameat.XXXXXX";
  25
  26   size_t dirbuflen = test_dir_len + sizeof (dir_name);
  27   char *dirbuf = malloc (dirbuflen);
  28   if (dirbuf == NULL)
  29     {
  30       puts ("out of memory");
  31       exit (1);
  32     }
  33
  34   snprintf (dirbuf, dirbuflen, "%s%s", test_dir, dir_name);
  35   if (mkdtemp (dirbuf) == NULL)
  36     {
  37       puts ("cannot create temporary directory");
  38       exit (1);
  39     }
  40
  41   add_temp_file (dirbuf);
  42
  43   dir_fd = open (dirbuf, O_RDONLY | O_DIRECTORY);
  44   if (dir_fd == -1)
  45     {
  46       puts ("cannot open directory");
  47       exit (1);
  48     }
  49 }
  50
  51
  52 static int
  53 do_test (void)
  54 {
  55   /* fdopendir takes over the descriptor, make a copy.  */
  56   int dupfd = dup (dir_fd);
  57   if (dupfd == -1)
  58     {
  59       puts ("dup failed");
  60       return 1;
  61     }
  62   if (lseek (dupfd, 0, SEEK_SET) != 0)
  63     {
  64       puts ("1st lseek failed");
  65       return 1;
  66     }
  67
  68   /* The directory should be empty safe the . and .. files.  */
  69   DIR *dir = fdopendir (dupfd);
  70   if (dir == NULL)
  71     {
  72       puts ("fdopendir failed");
  73       return 1;
  74     }
  75   struct dirent64 *d;
  76   while ((d = readdir64 (dir)) != NULL)
  77     if (strcmp (d->d_name, ".") != 0 && strcmp (d->d_name, "..") != 0)
  78       {
  79         printf ("temp directory contains file \"%s\"\n", d->d_name);
  80         return 1;
  81       }
  82   closedir (dir);
  83
  84   /* Try to create a file.  */
  85   int fd = openat (dir_fd, "some-file", O_CREAT|O_RDWR|O_EXCL, 0666);
  86   if (fd == -1)
  87     {
  88       if (errno == ENOSYS)
  89         {
  90           puts ("*at functions not supported");
  91           return 0;
  92         }
  93
  94       puts ("file creation failed");
  95       return 1;
  96     }
  97   write (fd, "hello", 5);
  98   puts ("file created");
  99
 100   struct stat64 st1;
 101   if (fstat64 (fd, &st1) != 0)
 102     {
 103       puts ("fstat64 failed");
 104       return 1;
 105     }
 106
 107   /* Using a descriptor for a normal file must fail.  */
 108   if (renameat (fd, "some-file", dir_fd, "another-file") == 0)
 109     {
 110       puts ("renameat with normal file descriptor succeeded");
 111       return 1;
 112     }
 113   if (errno != ENOTDIR)
 114     {
 115       puts ("error for renameat with normal file descriptor not ENOTDIR");
 116       return 1;
 117     }
 118
 119   if (renameat (dir_fd, "some-file", fd, "another-file") == 0)
 120     {
 121       puts ("2nd renameat with normal file descriptor succeeded");
 122       return 1;
 123     }
 124   if (errno != ENOTDIR)
 125     {
 126       puts ("error for 2nd renameat with normal file descriptor not ENOTDIR");
 127       return 1;
 128     }
 129
 130   close (fd);
 131
 132   if (renameat (dir_fd, "some-file", dir_fd, "another-file") != 0)
 133     {
 134       puts ("renameat failed");
 135       return 1;
 136     }
 137
 138   struct stat64 st2;
 139   if (fstatat64 (dir_fd, "some-file", &st2, 0) == 0)
 140     {
 141       puts ("fstatat64 succeeded");
 142       return 1;
 143     }
 144   if (errno != ENOENT)
 145     {
 146       puts ("fstatat64 did not fail with ENOENT");
 147       return 1;
 148     }
 149
 150   if (fstatat64 (dir_fd, "another-file", &st2, 0) != 0)
 151     {
 152       puts ("2nd fstatat64 failed");
 153       return 1;
 154     }
 155
 156   if (st1.st_dev != st2.st_dev
 157       || st1.st_ino != st2.st_ino
 158       || st1.st_size != st2.st_size)
 159     {
 160       puts ("stat results do not match");
 161       return 1;
 162     }
 163
 164   /* Create a file descriptor which is closed again right away.  */
 165   int dir_fd2 = dup (dir_fd);
 166   if (dir_fd2 == -1)
 167     {
 168       puts ("dup failed");
 169       return 1;
 170     }
 171   close (dir_fd2);
 172
 173   if (renameat (dir_fd2, "another-file", dir_fd, "some-file") == 0)
 174     {
 175       puts ("renameat with closed file descriptor succeeded");
 176       return 1;
 177     }
 178   if (errno != EBADF)
 179     {
 180       puts ("error for renameat with closed file descriptor not EBADF");
 181       return 1;
 182     }
 183
 184   if (renameat (dir_fd, "another-file", dir_fd2, "some-file") == 0)
 185     {
 186       puts ("2nd renameat with closed file descriptor succeeded");
 187       return 1;
 188     }
 189   if (errno != EBADF)
 190     {
 191       puts ("error for 2nd renameat with closed file descriptor not EBADF");
 192       return 1;
 193     }
 194
 195   if (unlinkat (dir_fd, "another-file", 0) != 0)
 196     {
 197       puts ("unlinkat failed");
 198       return 1;
 199     }
 200
 201   if (renameat (-1, "another-file", dir_fd, "some-file") == 0)
 202     {
 203       puts ("renameat with invalid file descriptor succeeded");
 204       return 1;
 205     }
 206   if (errno != EBADF)
 207     {
 208       puts ("error for renameat with invalid file descriptor not EBADF");
 209       return 1;
 210     }
 211
 212   if (renameat (dir_fd, "another-file", -1, "some-file") == 0)
 213     {
 214       puts ("2nd renameat with invalid file descriptor succeeded");
 215       return 1;
 216     }
 217   if (errno != EBADF)
 218     {
 219       puts ("error for 2nd renameat with invalid file descriptor not EBADF");
 220       return 1;
 221     }
 222
 223   close (dir_fd);
 224
 225   return 0;
 226 }