io/tst-futimesat.c

   1 /* futimesat basic tests.
   2    Copyright (C) 2021-2022 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <dirent.h>
  20 #include <errno.h>
  21 #include <fcntl.h>
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25 #include <unistd.h>
  26 #include <sys/stat.h>
  27 #include <sys/time.h>
  28
  29 #include <support/test-driver.h>
  30 #include <support/temp_file.h>
  31
  32 #ifndef struct_stat
  33 # define struct_stat struct stat64
  34 # define fstat       fstat64
  35 # define fstatat     fstatat64
  36 #endif
  37
  38 static int dir_fd;
  39
  40 static void
  41 prepare (int argc, char *argv[])
  42 {
  43   size_t test_dir_len = strlen (test_dir);
  44   static const char dir_name[] = "/tst-futimesat.XXXXXX";
  45
  46   size_t dirbuflen = test_dir_len + sizeof (dir_name);
  47   char *dirbuf = malloc (dirbuflen);
  48   if (dirbuf == NULL)
  49     {
  50       puts ("out of memory");
  51       exit (1);
  52     }
  53
  54   snprintf (dirbuf, dirbuflen, "%s%s", test_dir, dir_name);
  55   if (mkdtemp (dirbuf) == NULL)
  56     {
  57       puts ("cannot create temporary directory");
  58       exit (1);
  59     }
  60
  61   add_temp_file (dirbuf);
  62
  63   dir_fd = open (dirbuf, O_RDONLY | O_DIRECTORY);
  64   if (dir_fd == -1)
  65     {
  66       puts ("cannot open directory");
  67       exit (1);
  68     }
  69 }
  70 #define PREPARE prepare
  71
  72 static int
  73 do_test (void)
  74 {
  75   /* fdopendir takes over the descriptor, make a copy.  */
  76   int dupfd = dup (dir_fd);
  77   if (dupfd == -1)
  78     {
  79       puts ("dup failed");
  80       return 1;
  81     }
  82   if (lseek (dupfd, 0, SEEK_SET) != 0)
  83     {
  84       puts ("1st lseek failed");
  85       return 1;
  86     }
  87
  88   /* The directory should be empty safe the . and .. files.  */
  89   DIR *dir = fdopendir (dupfd);
  90   if (dir == NULL)
  91     {
  92       puts ("fdopendir failed");
  93       return 1;
  94     }
  95   struct dirent64 *d;
  96   while ((d = readdir64 (dir)) != NULL)
  97     if (strcmp (d->d_name, ".") != 0 && strcmp (d->d_name, "..") != 0)
  98       {
  99         printf ("temp directory contains file \"%s\"\n", d->d_name);
 100         return 1;
 101       }
 102   closedir (dir);
 103
 104   /* Try to create a file.  */
 105   int fd = openat (dir_fd, "some-file", O_CREAT|O_RDWR|O_EXCL, 0666);
 106   if (fd == -1)
 107     {
 108       if (errno == ENOSYS)
 109         {
 110           puts ("*at functions not supported");
 111           return 0;
 112         }
 113
 114       puts ("file creation failed");
 115       return 1;
 116     }
 117   write (fd, "hello", 5);
 118   puts ("file created");
 119
 120   struct_stat st1;
 121   if (fstat (fd, &st1) != 0)
 122     {
 123       puts ("fstat64 failed");
 124       return 1;
 125     }
 126
 127   close (fd);
 128
 129   struct timeval tv[2];
 130   tv[0].tv_sec = st1.st_atime + 1;
 131   tv[0].tv_usec = 0;
 132   tv[1].tv_sec = st1.st_mtime + 1;
 133   tv[1].tv_usec = 0;
 134   if (futimesat (dir_fd, "some-file", tv) != 0)
 135     {
 136       puts ("futimesat failed");
 137       return 1;
 138     }
 139
 140   struct_stat st2;
 141   if (fstatat (dir_fd, "some-file", &st2, 0) != 0)
 142     {
 143       puts ("fstatat64 failed");
 144       return 1;
 145     }
 146
 147   if (st2.st_mtime != tv[1].tv_sec
 148 #ifdef _STATBUF_ST_NSEC
 149       || st2.st_mtim.tv_nsec != 0
 150 #endif
 151       )
 152     {
 153       puts ("stat shows different mtime");
 154       return 1;
 155     }
 156
 157
 158   if (unlinkat (dir_fd, "some-file", 0) != 0)
 159     {
 160       puts ("unlinkat failed");
 161       return 1;
 162     }
 163
 164   close (dir_fd);
 165
 166   return 0;
 167 }
 168
 169 #include <support/test-driver.c>