dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
AC_DEFUN([gl_FUNC_LINKAT],
[
AC_REQUIRE([gl_FUNC_OPENAT])
AC_DEFUN([gl_FUNC_LINKAT],
[
AC_REQUIRE([gl_FUNC_OPENAT])
AC_REQUIRE([gl_FUNC_LINK_FOLLOWS_SYMLINK])
AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
AC_REQUIRE([gl_FUNC_LINK_FOLLOWS_SYMLINK])
AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
else
AC_CACHE_CHECK([whether linkat(,AT_SYMLINK_FOLLOW) works],
[gl_cv_func_linkat_follow],
else
AC_CACHE_CHECK([whether linkat(,AT_SYMLINK_FOLLOW) works],
[gl_cv_func_linkat_follow],
/* Create a regular file. */
fd = open ("conftest.a", O_CREAT | O_EXCL | O_WRONLY, 0600);
if (fd < 0)
/* Create a regular file. */
fd = open ("conftest.a", O_CREAT | O_EXCL | O_WRONLY, 0600);
if (fd < 0)
if (linkat (AT_FDCWD, "conftest.a", AT_FDCWD, "conftest.b",
AT_SYMLINK_FOLLOW) < 0)
return 0;
if (linkat (AT_FDCWD, "conftest.a", AT_FDCWD, "conftest.b",
AT_SYMLINK_FOLLOW) < 0)
return 0;
/* Test whether a trailing "/" is treated like "/.". */
if (linkat (AT_FDCWD, "conftest.a/", AT_FDCWD, "conftest.c",
AT_SYMLINK_FOLLOW) == 0)
/* Test whether a trailing "/" is treated like "/.". */
if (linkat (AT_FDCWD, "conftest.a/", AT_FDCWD, "conftest.c",
AT_SYMLINK_FOLLOW) == 0)
if (linkat (AT_FDCWD, "conftest.a", AT_FDCWD, "conftest.d/",
AT_SYMLINK_FOLLOW) == 0)
if (linkat (AT_FDCWD, "conftest.a", AT_FDCWD, "conftest.d/",
AT_SYMLINK_FOLLOW) == 0)
]])],
[gl_cv_func_linkat_slash=yes],
[gl_cv_func_linkat_slash=no],
]])],
[gl_cv_func_linkat_slash=yes],
[gl_cv_func_linkat_slash=no],
AC_DEFINE_UNQUOTED([LINKAT_TRAILING_SLASH_BUG], [$gl_linkat_slash_bug],
[Define to 1 if linkat fails to recognize a trailing slash.])
fi
AC_DEFINE_UNQUOTED([LINKAT_TRAILING_SLASH_BUG], [$gl_linkat_slash_bug],
[Define to 1 if linkat fails to recognize a trailing slash.])
fi