| 1 | # boottime.m4 serial 2
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| 2 | # Determine whether this system has infrastructure for obtaining the boot time.
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| 3 |
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| 4 | # Copyright (C) 1996, 2000, 2002, 2003, 2004 Free Software Foundation, Inc.
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| 5 |
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| 6 | # This program is free software; you can redistribute it and/or modify
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| 7 | # it under the terms of the GNU General Public License as published by
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| 8 | # the Free Software Foundation; either version 2, or (at your option)
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| 9 | # any later version.
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| 10 |
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| 11 | # This program is distributed in the hope that it will be useful,
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| 12 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 13 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 14 | # GNU General Public License for more details.
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| 15 |
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| 16 | # You should have received a copy of the GNU General Public License
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| 17 | # along with this program; if not, write to the Free Software Foundation,
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| 18 | # Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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| 19 |
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| 20 | # GNULIB_BOOT_TIME([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])
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| 21 | * ----------------------------------------------------------
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| 22 | AC_DEFUN([GNULIB_BOOT_TIME],
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| 23 | [
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| 24 | AC_CHECK_FUNCS(sysctl)
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| 25 | AC_CHECK_HEADERS_ONCE(sys/param.h)
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| 26 | AC_CHECK_HEADERS(sys/sysctl.h, [], [],
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| 27 | [AC_INCLUDES_DEFAULT
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| 28 | [#if HAVE_SYS_PARAM_H
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| 29 | #include <sys/param.h>
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| 30 | #endif]])
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| 31 | AC_CACHE_CHECK(
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| 32 | [whether we can get the system boot time],
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| 33 | [gnulib_cv_have_boot_time],
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| 34 | [
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| 35 | AC_COMPILE_IFELSE(
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| 36 | [AC_LANG_PROGRAM(
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| 37 | [AC_INCLUDES_DEFAULT
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| 38 | #if HAVE_SYSCTL && HAVE_SYS_SYSCTL_H
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| 39 | # if HAVE_SYS_PARAM_H
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| 40 | # include <sys/param.h> /* needed for OpenBSD 3.0 */
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| 41 | # endif
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| 42 | # include <sys/sysctl.h>
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| 43 | #endif
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| 44 | #ifdef HAVE_UTMPX_H
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| 45 | # include <utmpx.h>
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| 46 | #else
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| 47 | # include <utmp.h>
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| 48 | #endif
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| 49 | ],
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| 50 | [[
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| 51 | #if defined BOOT_TIME || (defined CTL_KERN && defined KERN_BOOTTIME)
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| 52 | /* your system *does* have the infrastructure to determine boot time */
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| 53 | #else
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| 54 | please_tell_us_how_to_determine_boot_time_on_your_system
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| 55 | #endif
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| 56 | ]])],
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| 57 | gnulib_cv_have_boot_time=yes,
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| 58 | gnulib_cv_have_boot_time=no)
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| 59 | ])
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| 60 | AS_IF([test $gnulib_cv_have_boot_time = yes], [$1], [$2])
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| 61 | ])
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