Blame io/tst-mkdirat.c

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#include <dirent.h>
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#include <fcntl.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/stat.h>
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static void prepare (void);
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#define PREPARE(argc, argv) prepare ()
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static int do_test (void);
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#define TEST_FUNCTION do_test ()
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#include "../test-skeleton.c"
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static int dir_fd;
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static void
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prepare (void)
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{
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  size_t test_dir_len = strlen (test_dir);
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  static const char dir_name[] = "/tst-mkdirat.XXXXXX";
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  size_t dirbuflen = test_dir_len + sizeof (dir_name);
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  char *dirbuf = malloc (dirbuflen);
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  if (dirbuf == NULL)
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    {
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      puts ("out of memory");
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      exit (1);
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    }
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  snprintf (dirbuf, dirbuflen, "%s%s", test_dir, dir_name);
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  if (mkdtemp (dirbuf) == NULL)
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    {
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      puts ("cannot create temporary directory");
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      exit (1);
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    }
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  add_temp_file (dirbuf);
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  dir_fd = open (dirbuf, O_RDONLY | O_DIRECTORY);
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  if (dir_fd == -1)
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    {
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      puts ("cannot open directory");
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      exit (1);
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    }
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}
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static int
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do_test (void)
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{
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  /* fdopendir takes over the descriptor, make a copy.  */
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  int dupfd = dup (dir_fd);
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  if (dupfd == -1)
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    {
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      puts ("dup failed");
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      return 1;
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    }
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  if (lseek (dupfd, 0, SEEK_SET) != 0)
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    {
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      puts ("1st lseek failed");
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      return 1;
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    }
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  /* The directory should be empty safe the . and .. files.  */
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  DIR *dir = fdopendir (dupfd);
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  if (dir == NULL)
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    {
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      puts ("fdopendir failed");
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      return 1;
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    }
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  struct dirent64 *d;
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  while ((d = readdir64 (dir)) != NULL)
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    if (strcmp (d->d_name, ".") != 0 && strcmp (d->d_name, "..") != 0)
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      {
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	printf ("temp directory contains file \"%s\"\n", d->d_name);
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	return 1;
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      }
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  closedir (dir);
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  /* Create a new directory.  */
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  int e = mkdirat (dir_fd, "some-dir", 0777);
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  if (e == -1)
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    {
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      if (errno == ENOSYS)
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	{
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	  puts ("*at functions not supported");
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	  return 0;
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	}
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      puts ("directory creation failed");
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      return 1;
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    }
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  struct stat64 st1;
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  if (fstatat64 (dir_fd, "some-dir", &st1, 0) != 0)
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    {
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      puts ("fstat64 failed");
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      return 1;
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    }
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  if (!S_ISDIR (st1.st_mode))
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    {
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      puts ("mkdirat did not create a directory");
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      return 1;
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    }
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  dupfd = dup (dir_fd);
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  if (dupfd == -1)
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    {
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      puts ("dup failed");
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      return 1;
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    }
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  if (lseek (dupfd, 0, SEEK_SET) != 0)
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    {
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      puts ("1st lseek failed");
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      return 1;
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    }
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  dir = fdopendir (dupfd);
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  if (dir == NULL)
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    {
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      puts ("2nd fdopendir failed");
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      return 1;
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    }
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  bool has_some_dir = false;
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  while ((d = readdir64 (dir)) != NULL)
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    if (strcmp (d->d_name, "some-dir") == 0)
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      {
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	has_some_dir = true;
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	if (d->d_type != DT_UNKNOWN && d->d_type != DT_DIR)
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	  {
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	    puts ("d_type for some-dir wrong");
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	    return 1;
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	  }
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      }
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    else if (strcmp (d->d_name, ".") != 0 && strcmp (d->d_name, "..") != 0)
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      {
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	printf ("temp directory contains file \"%s\"\n", d->d_name);
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	return 1;
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      }
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  closedir (dir);
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  if (!has_some_dir)
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    {
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      puts ("some-dir not in directory list");
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      return 1;
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    }
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  if (unlinkat (dir_fd, "some-dir", AT_REMOVEDIR) != 0)
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    {
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      puts ("unlinkat failed");
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      return 1;
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    }
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  close (dir_fd);
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  return 0;
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}