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glibc  2.9
tst-fstatat.c
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00001 #include <dirent.h>
00002 #include <fcntl.h>
00003 #include <stdio.h>
00004 #include <stdlib.h>
00005 #include <string.h>
00006 #include <unistd.h>
00007 
00008 
00009 static void prepare (void);
00010 #define PREPARE(argc, argv) prepare ()
00011 
00012 static int do_test (void);
00013 #define TEST_FUNCTION do_test ()
00014 
00015 #include "../test-skeleton.c"
00016 
00017 static int dir_fd;
00018 
00019 static void
00020 prepare (void)
00021 {
00022   size_t test_dir_len = strlen (test_dir);
00023   static const char dir_name[] = "/tst-fstatat.XXXXXX";
00024 
00025   size_t dirbuflen = test_dir_len + sizeof (dir_name);
00026   char *dirbuf = malloc (dirbuflen);
00027   if (dirbuf == NULL)
00028     {
00029       puts ("out of memory");
00030       exit (1);
00031     }
00032 
00033   snprintf (dirbuf, dirbuflen, "%s%s", test_dir, dir_name);
00034   if (mkdtemp (dirbuf) == NULL)
00035     {
00036       puts ("cannot create temporary directory");
00037       exit (1);
00038     }
00039 
00040   add_temp_file (dirbuf);
00041 
00042   dir_fd = open (dirbuf, O_RDONLY | O_DIRECTORY);
00043   if (dir_fd == -1)
00044     {
00045       puts ("cannot open directory");
00046       exit (1);
00047     }
00048 }
00049 
00050 
00051 static int
00052 do_test (void)
00053 {
00054   /* fdopendir takes over the descriptor, make a copy.  */
00055   int dupfd = dup (dir_fd);
00056   if (dupfd == -1)
00057     {
00058       puts ("dup failed");
00059       return 1;
00060     }
00061   if (lseek (dupfd, 0, SEEK_SET) != 0)
00062     {
00063       puts ("1st lseek failed");
00064       return 1;
00065     }
00066 
00067   /* The directory should be empty safe the . and .. files.  */
00068   DIR *dir = fdopendir (dupfd);
00069   if (dir == NULL)
00070     {
00071       puts ("fdopendir failed");
00072       return 1;
00073     }
00074   struct dirent64 *d;
00075   while ((d = readdir64 (dir)) != NULL)
00076     if (strcmp (d->d_name, ".") != 0 && strcmp (d->d_name, "..") != 0)
00077       {
00078        printf ("temp directory contains file \"%s\"\n", d->d_name);
00079        return 1;
00080       }
00081   closedir (dir);
00082 
00083   /* Try to create a file.  */
00084   int fd = openat (dir_fd, "some-file", O_CREAT|O_RDWR|O_EXCL, 0666);
00085   if (fd == -1)
00086     {
00087       if (errno == ENOSYS)
00088        {
00089          puts ("*at functions not supported");
00090          return 0;
00091        }
00092 
00093       puts ("file creation failed");
00094       return 1;
00095     }
00096   write (fd, "hello", 5);
00097   puts ("file created");
00098 
00099   struct stat64 st1;
00100 
00101   /* Before closing the file, try using this file descriptor to open
00102      another file.  This must fail.  */
00103   if (fstatat64 (fd, "some-file", &st1, 0) != -1)
00104     {
00105       puts ("fstatatat using descriptor for normal file worked");
00106       return 1;
00107     }
00108   if (errno != ENOTDIR)
00109     {
00110       puts ("error for fstatat using descriptor for normal file not ENOTDIR ");
00111       return 1;
00112     }
00113 
00114   if (fstat64 (fd, &st1) != 0)
00115     {
00116       puts ("fstat64 failed");
00117       return 1;
00118     }
00119 
00120   close (fd);
00121 
00122   struct stat64 st2;
00123   if (fstatat64 (dir_fd, "some-file", &st2, 0) != 0)
00124     {
00125       puts ("fstatat64 failed");
00126       return 1;
00127     }
00128 
00129   if (st1.st_dev != st2.st_dev
00130       || st1.st_ino != st2.st_ino
00131       || st1.st_size != st2.st_size)
00132     {
00133       puts ("stat results do not match");
00134       return 1;
00135     }
00136 
00137   if (unlinkat (dir_fd, "some-file", 0) != 0)
00138     {
00139       puts ("unlinkat failed");
00140       return 1;
00141     }
00142 
00143   if (fstatat64 (dir_fd, "some-file", &st2, 0) == 0)
00144     {
00145       puts ("second fstatat64 succeeded");
00146       return 1;
00147     }
00148   if (errno != ENOENT)
00149     {
00150       puts ("second fstatat64 did not fail with ENOENT");
00151       return 1;
00152     }
00153 
00154   /* Create a file descriptor which is closed again right away.  */
00155   int dir_fd2 = dup (dir_fd);
00156   if (dir_fd2 == -1)
00157     {
00158       puts ("dup failed");
00159       return 1;
00160     }
00161   close (dir_fd2);
00162 
00163   if (fstatat64 (dir_fd2, "some-file", &st1, 0) != -1)
00164     {
00165       puts ("fstatat64 using closed descriptor worked");
00166       return 1;
00167     }
00168   if (errno != EBADF)
00169     {
00170       puts ("error for fstatat using closed descriptor not EBADF ");
00171       return 1;
00172     }
00173 
00174   close (dir_fd);
00175 
00176   if (fstatat64 (-1, "some-file", &st1, 0) != -1)
00177     {
00178       puts ("fstatat64 using invalid descriptor worked");
00179       return 1;
00180     }
00181   if (errno != EBADF)
00182     {
00183       puts ("error for fstatat using invalid descriptor not EBADF ");
00184       return 1;
00185     }
00186 
00187   return 0;
00188 }