1# Checks for stat-related time functions.
2
3# Copyright (C) 1998-1999, 2001, 2003, 2005-2007, 2009-2020 Free Software
4# Foundation, Inc.
5
6# This file is free software; the Free Software Foundation
7# gives unlimited permission to copy and/or distribute it,
8# with or without modifications, as long as this notice is preserved.
9
10dnl From Paul Eggert.
11
12# st_atim.tv_nsec - Linux, Solaris, Cygwin
13# st_atimespec.tv_nsec - FreeBSD, NetBSD, if ! defined _POSIX_SOURCE
14# st_atimensec - FreeBSD, NetBSD, if defined _POSIX_SOURCE
15# st_atim.st__tim.tv_nsec - UnixWare (at least 2.1.2 through 7.1)
16
17# st_birthtimespec - FreeBSD, NetBSD (hidden on OpenBSD 3.9, anyway)
18# st_birthtim - Cygwin 1.7.0+
19
20AC_DEFUN([gl_STAT_TIME],
21[
22  AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
23  AC_CHECK_HEADERS_ONCE([sys/time.h])
24
25  AC_CHECK_MEMBERS([struct stat.st_atim.tv_nsec],
26    [AC_CACHE_CHECK([whether struct stat.st_atim is of type struct timespec],
27       [ac_cv_typeof_struct_stat_st_atim_is_struct_timespec],
28       [AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
29          [[
30            #include <sys/types.h>
31            #include <sys/stat.h>
32            #if HAVE_SYS_TIME_H
33            # include <sys/time.h>
34            #endif
35            #include <time.h>
36            struct timespec ts;
37            struct stat st;
38          ]],
39          [[
40            st.st_atim = ts;
41          ]])],
42          [ac_cv_typeof_struct_stat_st_atim_is_struct_timespec=yes],
43          [ac_cv_typeof_struct_stat_st_atim_is_struct_timespec=no])])
44     if test $ac_cv_typeof_struct_stat_st_atim_is_struct_timespec = yes; then
45       AC_DEFINE([TYPEOF_STRUCT_STAT_ST_ATIM_IS_STRUCT_TIMESPEC], [1],
46         [Define to 1 if the type of the st_atim member of a struct stat is
47          struct timespec.])
48     fi],
49    [AC_CHECK_MEMBERS([struct stat.st_atimespec.tv_nsec], [],
50       [AC_CHECK_MEMBERS([struct stat.st_atimensec], [],
51          [AC_CHECK_MEMBERS([struct stat.st_atim.st__tim.tv_nsec], [], [],
52             [#include <sys/types.h>
53              #include <sys/stat.h>])],
54          [#include <sys/types.h>
55           #include <sys/stat.h>])],
56       [#include <sys/types.h>
57        #include <sys/stat.h>])],
58    [#include <sys/types.h>
59     #include <sys/stat.h>])
60])
61
62# Check for st_birthtime, a feature from UFS2 (FreeBSD, NetBSD, OpenBSD, etc.)
63# and NTFS (Cygwin).
64# There was a time when this field was named st_createtime (21 June
65# 2002 to 16 July 2002) But that window is very small and applied only
66# to development code, so systems still using that configuration are
67# not supported.  See revisions 1.10 and 1.11 of FreeBSD's
68# src/sys/ufs/ufs/dinode.h.
69#
70AC_DEFUN([gl_STAT_BIRTHTIME],
71[
72  AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
73  AC_CHECK_HEADERS_ONCE([sys/time.h])
74  AC_CHECK_MEMBERS([struct stat.st_birthtimespec.tv_nsec], [],
75    [AC_CHECK_MEMBERS([struct stat.st_birthtimensec], [],
76      [AC_CHECK_MEMBERS([struct stat.st_birthtim.tv_nsec], [], [],
77         [#include <sys/types.h>
78          #include <sys/stat.h>])],
79       [#include <sys/types.h>
80        #include <sys/stat.h>])],
81    [#include <sys/types.h>
82     #include <sys/stat.h>])
83])
84