io/tst-futimesat.c

   1 /* futimesat basic tests.
   2    Copyright (C) 2021-2023 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 #include <support/xunistd.h>
  32
  33 #ifndef struct_stat
  34 # define struct_stat struct stat64
  35 # define fstat       fstat64
  36 # define fstatat     fstatat64
  37 #endif
  38
  39 static int dir_fd;
  40
  41 static void
  42 prepare (int argc, char *argv[])
  43 {
  44   size_t test_dir_len = strlen (test_dir);
  45   static const char dir_name[] = "/tst-futimesat.XXXXXX";
  46
  47   size_t dirbuflen = test_dir_len + sizeof (dir_name);
  48   char *dirbuf = malloc (dirbuflen);
  49   if (dirbuf == NULL)
  50     {
  51       puts ("out of memory");
  52       exit (1);
  53     }
  54
  55   snprintf (dirbuf, dirbuflen, "%s%s", test_dir, dir_name);
  56   if (mkdtemp (dirbuf) == NULL)
  57     {
  58       puts ("cannot create temporary directory");
  59       exit (1);
  60     }
  61
  62   add_temp_file (dirbuf);
  63
  64   dir_fd = open (dirbuf, O_RDONLY | O_DIRECTORY);
  65   if (dir_fd == -1)
  66     {
  67       puts ("cannot open directory");
  68       exit (1);
  69     }
  70 }
  71 #define PREPARE prepare
  72
  73 static int
  74 do_test (void)
  75 {
  76   /* fdopendir takes over the descriptor, make a copy.  */
  77   int dupfd = dup (dir_fd);
  78   if (dupfd == -1)
  79     {
  80       puts ("dup failed");
  81       return 1;
  82     }
  83   if (lseek (dupfd, 0, SEEK_SET) != 0)
  84     {
  85       puts ("1st lseek failed");
  86       return 1;
  87     }
  88
  89   /* The directory should be empty safe the . and .. files.  */
  90   DIR *dir = fdopendir (dupfd);
  91   if (dir == NULL)
  92     {
  93       puts ("fdopendir failed");
  94       return 1;
  95     }
  96   struct dirent64 *d;
  97   while ((d = readdir64 (dir)) != NULL)
  98     if (strcmp (d->d_name, ".") != 0 && strcmp (d->d_name, "..") != 0)
  99       {
 100         printf ("temp directory contains file \"%s\"\n", d->d_name);
 101         return 1;
 102       }
 103   closedir (dir);
 104
 105   /* Try to create a file.  */
 106   int fd = openat (dir_fd, "some-file", O_CREAT|O_RDWR|O_EXCL, 0666);
 107   if (fd == -1)
 108     {
 109       if (errno == ENOSYS)
 110         {
 111           puts ("*at functions not supported");
 112           return 0;
 113         }
 114
 115       puts ("file creation failed");
 116       return 1;
 117     }
 118   xwrite (fd, "hello", 5);
 119   puts ("file created");
 120
 121   struct_stat st1;
 122   if (fstat (fd, &st1) != 0)
 123     {
 124       puts ("fstat64 failed");
 125       return 1;
 126     }
 127
 128   close (fd);
 129
 130   struct timeval tv[2];
 131   tv[0].tv_sec = st1.st_atime + 1;
 132   tv[0].tv_usec = 0;
 133   tv[1].tv_sec = st1.st_mtime + 1;
 134   tv[1].tv_usec = 0;
 135   if (futimesat (dir_fd, "some-file", tv) != 0)
 136     {
 137       puts ("futimesat failed");
 138       return 1;
 139     }
 140
 141   struct_stat st2;
 142   if (fstatat (dir_fd, "some-file", &st2, 0) != 0)
 143     {
 144       puts ("fstatat64 failed");
 145       return 1;
 146     }
 147
 148   if (st2.st_mtime != tv[1].tv_sec
 149 #ifdef _STATBUF_ST_NSEC
 150       || st2.st_mtim.tv_nsec != 0
 151 #endif
 152       )
 153     {
 154       puts ("stat shows different mtime");
 155       return 1;
 156     }
 157
 158
 159   if (unlinkat (dir_fd, "some-file", 0) != 0)
 160     {
 161       puts ("unlinkat failed");
 162       return 1;
 163     }
 164
 165   close (dir_fd);
 166
 167   return 0;
 168 }
 169
 170 #include <support/test-driver.c>