71 lines
2.2 KiB
Plaintext
71 lines
2.2 KiB
Plaintext
# futimens.m4
|
|
# serial 11
|
|
dnl Copyright (C) 2009-2024 Free Software Foundation, Inc.
|
|
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.
|
|
|
|
# See if we need to provide futimens replacement.
|
|
|
|
# Written by Eric Blake.
|
|
|
|
AC_DEFUN([gl_FUNC_FUTIMENS],
|
|
[
|
|
AC_REQUIRE([gl_SYS_STAT_H_DEFAULTS])
|
|
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
|
|
AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
|
|
gl_CHECK_FUNCS_ANDROID([futimens], [[#include <sys/stat.h>]])
|
|
if test $ac_cv_func_futimens = no; then
|
|
HAVE_FUTIMENS=0
|
|
case "$gl_cv_onwards_func_futimens" in
|
|
future*) REPLACE_FUTIMENS=1 ;;
|
|
esac
|
|
else
|
|
AC_CACHE_CHECK([whether futimens works],
|
|
[gl_cv_func_futimens_works],
|
|
[AC_RUN_IFELSE([AC_LANG_PROGRAM([[
|
|
#include <fcntl.h>
|
|
#include <sys/stat.h>
|
|
#include <unistd.h>
|
|
#include <errno.h>
|
|
]GL_MDA_DEFINES],
|
|
[[struct timespec ts[2];
|
|
int fd = creat ("conftest.file", 0600);
|
|
struct stat st;
|
|
if (fd < 0) return 1;
|
|
ts[0].tv_sec = 1;
|
|
ts[0].tv_nsec = UTIME_OMIT;
|
|
ts[1].tv_sec = 1;
|
|
ts[1].tv_nsec = UTIME_NOW;
|
|
errno = 0;
|
|
if (futimens (AT_FDCWD, NULL) == 0) return 2;
|
|
if (errno != EBADF) return 3;
|
|
if (futimens (fd, ts)) return 4;
|
|
sleep (1);
|
|
ts[0].tv_nsec = UTIME_NOW;
|
|
ts[1].tv_nsec = UTIME_OMIT;
|
|
if (futimens (fd, ts)) return 5;
|
|
if (fstat (fd, &st)) return 6;
|
|
if (st.st_ctime < st.st_atime) return 7;
|
|
]])],
|
|
[gl_cv_func_futimens_works=yes],
|
|
[gl_cv_func_futimens_works=no],
|
|
[case "$host_os" in
|
|
# Guess no on glibc systems.
|
|
*-gnu* | gnu*) gl_cv_func_futimens_works="guessing no" ;;
|
|
# Guess no on musl systems.
|
|
*-musl*) gl_cv_func_futimens_works="guessing no" ;;
|
|
# Guess yes otherwise.
|
|
*) gl_cv_func_futimens_works="guessing yes" ;;
|
|
esac
|
|
])
|
|
rm -f conftest.file])
|
|
case "$gl_cv_func_futimens_works" in
|
|
*yes) ;;
|
|
*)
|
|
REPLACE_FUTIMENS=1
|
|
;;
|
|
esac
|
|
fi
|
|
])
|