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glibc  2.9
tst-unlinkat.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-unlinkat.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   close (fd);
00098   puts ("file created");
00099 
00100   /* fdopendir takes over the descriptor, make a copy.  */
00101   dupfd = dup (dir_fd);
00102   if (dupfd == -1)
00103     {
00104       puts ("2nd dup failed");
00105       return 1;
00106     }
00107   if (lseek (dupfd, 0, SEEK_SET) != 0)
00108     {
00109       puts ("2nd lseek failed");
00110       return 1;
00111     }
00112 
00113   /* The directory should be empty safe the . and .. files.  */
00114   dir = fdopendir (dupfd);
00115   if (dir == NULL)
00116     {
00117       puts ("2nd fdopendir failed");
00118       return 1;
00119     }
00120   bool seen_file = false;
00121   while ((d = readdir64 (dir)) != NULL)
00122     if (strcmp (d->d_name, ".") != 0 && strcmp (d->d_name, "..") != 0)
00123       {
00124        if (strcmp (d->d_name, "some-file") != 0)
00125          {
00126            printf ("temp directory contains file \"%s\"\n", d->d_name);
00127            return 1;
00128          }
00129 
00130        seen_file = true;
00131       }
00132   closedir (dir);
00133 
00134   if (!seen_file)
00135     {
00136       puts ("file not created in correct directory");
00137       return 1;
00138     }
00139 
00140   /* Remove the file now.  */
00141   if (unlinkat (dir_fd, "some-file", 0) != 0)
00142     {
00143       puts ("unlinkat failed");
00144       return 1;
00145     }
00146 
00147   /* We won't need dir_fd anymore after this, so use it.  */
00148   if (lseek (dir_fd, 0, SEEK_SET) != 0)
00149     {
00150       puts ("3rd lseek failed");
00151       return 1;
00152     }
00153 
00154   /* The directory should be empty safe the . and .. files.  */
00155   dir = fdopendir (dir_fd);
00156   if (dir == NULL)
00157     {
00158       puts ("3rd fdopendir failed");
00159       return 1;
00160     }
00161   while ((d = readdir64 (dir)) != NULL)
00162     if (strcmp (d->d_name, ".") != 0 && strcmp (d->d_name, "..") != 0)
00163       {
00164        if (strcmp (d->d_name, "some-file") == 0)
00165          {
00166            puts ("some-file not removed");
00167            return 1;
00168          }
00169        else
00170          {
00171            printf ("temp directory contains file \"%s\"\n", d->d_name);
00172            return 1;
00173          }
00174       }
00175   closedir (dir);
00176 
00177   return 0;
00178 }