diff options
Diffstat (limited to 'm4/readutmp.m4')
| -rw-r--r-- | m4/readutmp.m4 | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/m4/readutmp.m4 b/m4/readutmp.m4 new file mode 100644 index 00000000000..ec40019735f --- /dev/null +++ b/m4/readutmp.m4 @@ -0,0 +1,121 @@ +# readutmp.m4 serial 31 +dnl Copyright (C) 2002-2024 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. + +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 $ac_cv_header_systemd_sd_login_h = yes; then + AC_CACHE_CHECK([for libsystemd version >= 254], + [gl_cv_lib_readutmp_systemd], + [gl_saved_LIBS="$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_saved_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]) +]) |