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/* Basic test of statx system call.
Copyright (C) 2018-2025 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <errno.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <support/check.h>
#include <support/support.h>
#include <support/temp_file.h>
#include <support/xunistd.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/sysmacros.h>
#include <unistd.h>
/* Ensure that the types have the kernel-expected layout. */
_Static_assert (sizeof (struct statx_timestamp) == 16, "statx_timestamp size");
_Static_assert (sizeof (struct statx) == 256, "statx size");
_Static_assert (offsetof (struct statx, stx_nlink) == 16, "statx nlink");
_Static_assert (offsetof (struct statx, stx_ino) == 32, "statx ino");
_Static_assert (offsetof (struct statx, stx_atime) == 64, "statx atime");
_Static_assert (offsetof (struct statx, stx_rdev_major) == 128, "statx rdev");
_Static_assert (offsetof (struct statx, __statx_pad2) == 144, "statx pad2");
#include "statx_generic.c"
typedef int (*statx_function) (int, const char *, int, unsigned int,
struct statx *);
/* Return true if we have a real implementation of statx. */
static bool
kernel_supports_statx (void)
{
#ifdef __NR_statx
struct statx buf;
return syscall (__NR_statx, 0, "", AT_EMPTY_PATH, 0, &buf) == 0
|| errno != ENOSYS;
#else
return false;
#endif
}
/* Tests which apply to both implementations. */
static void
both_implementations_tests (statx_function impl, const char *path, int fd)
{
uint64_t ino;
{
struct statx buf = { 0, };
TEST_COMPARE (statx (fd, "", AT_EMPTY_PATH, STATX_BASIC_STATS, &buf), 0);
TEST_COMPARE (buf.stx_size, 3);
ino = buf.stx_ino;
}
{
struct statx buf = { 0, };
TEST_COMPARE (statx (AT_FDCWD, path, 0, STATX_BASIC_STATS, &buf), 0);
TEST_COMPARE (buf.stx_size, 3);
TEST_COMPARE (buf.stx_ino, ino);
}
{
struct statx stx = { 0, };
TEST_COMPARE (statx (fd, "", AT_EMPTY_PATH, STATX_BASIC_STATS, &stx), 0);
struct stat64 st;
xfstat64 (fd, &st);
TEST_COMPARE (stx.stx_mode, st.st_mode);
TEST_COMPARE (stx.stx_dev_major, major (st.st_dev));
TEST_COMPARE (stx.stx_dev_minor, minor (st.st_dev));
}
{
struct statx stx = { 0, };
TEST_COMPARE (statx (AT_FDCWD, "/dev/null", 0, STATX_BASIC_STATS, &stx),
0);
struct stat64 st;
xstat64 ("/dev/null", &st);
TEST_COMPARE (stx.stx_mode, st.st_mode);
TEST_COMPARE (stx.stx_dev_major, major (st.st_dev));
TEST_COMPARE (stx.stx_dev_minor, minor (st.st_dev));
TEST_COMPARE (stx.stx_rdev_major, major (st.st_rdev));
TEST_COMPARE (stx.stx_rdev_minor, minor (st.st_rdev));
}
}
/* Tests which apply only to the non-kernel (generic)
implementation. */
static void
non_kernel_tests (statx_function impl, int fd)
{
/* The non-kernel implementation must always fail for explicit sync
flags. */
struct statx buf;
errno = 0;
TEST_COMPARE (impl (fd, "", AT_EMPTY_PATH | AT_STATX_FORCE_SYNC,
STATX_BASIC_STATS, &buf), -1);
TEST_COMPARE (errno, EINVAL);
errno = 0;
TEST_COMPARE (impl (fd, "", AT_EMPTY_PATH | AT_STATX_DONT_SYNC,
STATX_BASIC_STATS, &buf), -1);
TEST_COMPARE (errno, EINVAL);
}
static int
do_test (void)
{
char *path;
int fd = create_temp_file ("tst-statx-", &path);
TEST_VERIFY_EXIT (fd >= 0);
support_write_file_string (path, "abc");
both_implementations_tests (&statx, path, fd);
both_implementations_tests (&statx_generic, path, fd);
if (kernel_supports_statx ())
{
puts ("info: kernel supports statx");
struct statx buf;
buf.stx_size = 0;
TEST_COMPARE (statx (fd, "", AT_EMPTY_PATH | AT_STATX_FORCE_SYNC,
STATX_BASIC_STATS, &buf),
0);
TEST_COMPARE (buf.stx_size, 3);
buf.stx_size = 0;
TEST_COMPARE (statx (fd, "", AT_EMPTY_PATH | AT_STATX_DONT_SYNC,
STATX_BASIC_STATS, &buf),
0);
TEST_COMPARE (buf.stx_size, 3);
}
else
{
puts ("info: kernel does not support statx");
non_kernel_tests (&statx, fd);
}
non_kernel_tests (&statx_generic, fd);
xclose (fd);
free (path);
return 0;
}
#include <support/test-driver.c>
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