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# readutmp.m4 serial 30
dnl Copyright (C) 2002-2023 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.
AC_DEFUN([gl_READUTMP],
[
AC_REQUIRE([gl_SYSTEMD_CHOICE])
dnl Set READUTMP_LIB to '-lsystemd' or '', depending on whether use of
dnl systemd APIs is possible and desired (only the systemd login API, here).
dnl AC_LIB_LINKFLAGS_BODY would be overkill here, since few people install
dnl libsystemd in non-system directories.
READUTMP_LIB=
if test "$SYSTEMD_CHOICE" = yes; then
AC_CHECK_HEADER([systemd/sd-login.h])
if test $ac_cv_header_systemd_sd_login_h = yes; then
AC_CACHE_CHECK([for libsystemd version >= 254],
[gl_cv_lib_readutmp_systemd],
[gl_save_LIBS="$LIBS"
LIBS="$LIBS -lsystemd"
AC_LINK_IFELSE(
[AC_LANG_PROGRAM([[
#include <stdint.h>
#include <systemd/sd-login.h>
]], [[
uint64_t st;
sd_session_get_start_time ("1", &st);
]])
],
[gl_cv_lib_readutmp_systemd=yes],
[gl_cv_lib_readutmp_systemd=no])
LIBS="$gl_save_LIBS"
])
if test $gl_cv_lib_readutmp_systemd = yes; then
AC_DEFINE([READUTMP_USE_SYSTEMD], [1],
[Define if the readutmp module should use the systemd login API.])
READUTMP_LIB='-lsystemd'
fi
fi
fi
AC_SUBST([READUTMP_LIB])
gl_PREREQ_READUTMP_H
])
# Prerequisites of readutmp.h and boot-time-aux.h.
AC_DEFUN_ONCE([gl_PREREQ_READUTMP_H],
[
dnl Persuade utmpx.h to declare utmpxname
AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
AC_CHECK_HEADERS_ONCE([utmp.h utmpx.h])
if test $ac_cv_header_utmp_h = yes || test $ac_cv_header_utmpx_h = yes; then
dnl Prerequisites of lib/readutmp.h and lib/readutmp.c.
AC_CHECK_FUNCS_ONCE([utmpname utmpxname])
AC_CHECK_DECLS([endutent],,,[[
/* <sys/types.h> is a prerequisite of <utmp.h> on FreeBSD 8.0, OpenBSD 4.6. */
#include <sys/types.h>
#ifdef HAVE_UTMP_H
# include <utmp.h>
#endif
]])
utmp_includes="\
AC_INCLUDES_DEFAULT
#ifdef HAVE_UTMPX_H
# include <utmpx.h>
#endif
#ifdef HAVE_UTMP_H
# if defined _THREAD_SAFE && defined UTMP_DATA_INIT
/* When including both utmp.h and utmpx.h on AIX 4.3, with _THREAD_SAFE
defined, work around the duplicate struct utmp_data declaration. */
# define utmp_data gl_aix_4_3_workaround_utmp_data
# endif
# include <utmp.h>
#endif
"
AC_CHECK_MEMBERS([struct utmpx.ut_user],,,[$utmp_includes])
AC_CHECK_MEMBERS([struct utmp.ut_user],,,[$utmp_includes])
AC_CHECK_MEMBERS([struct utmpx.ut_name],,,[$utmp_includes])
AC_CHECK_MEMBERS([struct utmp.ut_name],,,[$utmp_includes])
AC_CHECK_MEMBERS([struct utmpx.ut_type],,,[$utmp_includes])
AC_CHECK_MEMBERS([struct utmp.ut_type],,,[$utmp_includes])
AC_CHECK_MEMBERS([struct utmpx.ut_pid],,,[$utmp_includes])
AC_CHECK_MEMBERS([struct utmp.ut_pid],,,[$utmp_includes])
AC_CHECK_MEMBERS([struct utmp.ut_tv],,,[$utmp_includes])
AC_CHECK_MEMBERS([struct utmpx.ut_host],,,[$utmp_includes])
AC_CHECK_MEMBERS([struct utmp.ut_host],,,[$utmp_includes])
AC_CHECK_MEMBERS([struct utmpx.ut_id],,,[$utmp_includes])
AC_CHECK_MEMBERS([struct utmp.ut_id],,,[$utmp_includes])
AC_CHECK_MEMBERS([struct utmpx.ut_session],,,[$utmp_includes])
AC_CHECK_MEMBERS([struct utmp.ut_session],,,[$utmp_includes])
AC_CHECK_MEMBERS([struct utmpx.ut_exit],,,[$utmp_includes])
AC_CHECK_MEMBERS([struct utmp.ut_exit],,,[$utmp_includes])
AC_CHECK_MEMBERS([struct utmpx.ut_exit.ut_exit],,,[$utmp_includes])
AC_CHECK_MEMBERS([struct utmpx.ut_exit.e_exit],,,[$utmp_includes])
AC_CHECK_MEMBERS([struct utmp.ut_exit.e_exit],,,[$utmp_includes])
AC_CHECK_MEMBERS([struct utmpx.ut_exit.ut_termination],,,[$utmp_includes])
AC_CHECK_MEMBERS([struct utmpx.ut_exit.e_termination],,,[$utmp_includes])
AC_CHECK_MEMBERS([struct utmp.ut_exit.e_termination],,,[$utmp_includes])
fi
AC_CHECK_DECLS([sysinfo],,,[[
#include <sys/sysinfo.h>
]])
AC_CHECK_HEADERS_ONCE([sys/param.h])
dnl <sys/sysctl.h> requires <sys/param.h> on OpenBSD 4.0.
AC_CHECK_HEADERS([sys/sysctl.h],,,
[AC_INCLUDES_DEFAULT
#if HAVE_SYS_PARAM_H
# include <sys/param.h>
#endif
])
AC_CHECK_FUNCS([sysctl])
AC_CHECK_HEADERS_ONCE([OS.h])
])
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