io/tst-stat.c

   1 /* Basic tests for stat, lstat, fstat, and fstatat.
   2    Copyright (C) 2021-2024 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 <array_length.h>
  20 #include <errno.h>
  21 #include <fcntl.h>
  22 #include <support/check.h>
  23 #include <support/support.h>
  24 #include <support/temp_file.h>
  25 #include <support/xunistd.h>
  26 #include <sys/stat.h>
  27 #include <sys/sysmacros.h>
  28 #include <stdio.h>
  29 #include <unistd.h>
  30
  31 static void
  32 stat_check (int fd, const char *path, struct stat *st)
  33 {
  34   TEST_COMPARE (stat (path, st), 0);
  35 }
  36
  37 static void
  38 lstat_check (int fd, const char *path, struct stat *st)
  39 {
  40   TEST_COMPARE (lstat (path, st), 0);
  41 }
  42
  43 static void
  44 fstat_check (int fd, const char *path, struct stat *st)
  45 {
  46   /* Test for invalid fstat input (BZ #27559).  */
  47   TEST_COMPARE (fstat (AT_FDCWD, st), -1);
  48   TEST_COMPARE (errno, EBADF);
  49
  50   TEST_COMPARE (fstat (fd, st), 0);
  51 }
  52
  53 static void
  54 fstatat_check (int fd, const char *path, struct stat *st)
  55 {
  56   TEST_COMPARE (fstatat (fd, "", st, 0), -1);
  57   TEST_COMPARE (errno, ENOENT);
  58
  59   TEST_COMPARE (fstatat (fd, path, st, 0), 0);
  60 }
  61
  62 typedef void (*test_t)(int, const char *path, struct stat *);
  63
  64 static int
  65 do_test (void)
  66 {
  67   char *path;
  68   int fd = create_temp_file ("tst-fstat.", &path);
  69   TEST_VERIFY_EXIT (fd >= 0);
  70   support_write_file_string (path, "abc");
  71
  72   /* This should help to prevent delayed allocation, which may result
  73      in a spurious stx_blocks/st_blocks difference.  */
  74   fsync (fd);
  75
  76   bool check_ns = support_stat_nanoseconds (path);
  77   if (!check_ns)
  78     printf ("warning: timestamp with nanoseconds not supported\n");
  79
  80   struct statx stx;
  81   TEST_COMPARE (statx (fd, path, 0, STATX_BASIC_STATS, &stx), 0);
  82
  83   test_t tests[] = { stat_check, lstat_check, fstat_check, fstatat_check };
  84
  85   for (int i = 0; i < array_length (tests); i++)
  86     {
  87       struct stat st;
  88       tests[i](fd, path, &st);
  89
  90       TEST_COMPARE (stx.stx_dev_major, major (st.st_dev));
  91       TEST_COMPARE (stx.stx_dev_minor, minor (st.st_dev));
  92       TEST_COMPARE (stx.stx_ino, st.st_ino);
  93       TEST_COMPARE (stx.stx_mode, st.st_mode);
  94       TEST_COMPARE (stx.stx_nlink, st.st_nlink);
  95       TEST_COMPARE (stx.stx_uid, st.st_uid);
  96       TEST_COMPARE (stx.stx_gid, st.st_gid);
  97       TEST_COMPARE (stx.stx_rdev_major, major (st.st_rdev));
  98       TEST_COMPARE (stx.stx_rdev_minor, minor (st.st_rdev));
  99       TEST_COMPARE (stx.stx_blksize, st.st_blksize);
 100       TEST_COMPARE (stx.stx_blocks, st.st_blocks);
 101
 102       TEST_COMPARE (stx.stx_ctime.tv_sec, st.st_ctim.tv_sec);
 103       TEST_COMPARE (stx.stx_mtime.tv_sec, st.st_mtim.tv_sec);
 104       if (check_ns)
 105         {
 106           TEST_COMPARE (stx.stx_ctime.tv_nsec, st.st_ctim.tv_nsec);
 107           TEST_COMPARE (stx.stx_mtime.tv_nsec, st.st_mtim.tv_nsec);
 108         }
 109     }
 110
 111   return 0;
 112 }
 113
 114 #include <support/test-driver.c>