drop privileges when running as group utmp

[wall-notify/wall-notify.git] / configure.ac

diff --git a/configure.ac b/configure.ac
index 528f7146ba45d116615fb97d6b4601a8f409a490..9f1efc3a1e4ba30cbe52b7797054c5fddd787b48 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -37,12 +37,16 @@ fi
 AC_CHECK_HEADERS([utempter.h utmpx.h])
 
 if test "x$ac_cv_header_utempter_h" = xyes; then
+    AC_CHECK_FUNCS([setresuid setresgid],[],
+                   [AC_MSG_ERROR([setresuid() and setresgid() required for utmpx])])
+
     AC_MSG_NOTICE([using utempter])
     AC_CHECK_LIB([utempter], [utempter_add_record],
                  [], [AC_MSG_ERROR([utempter_add_record() required])])
     AC_CHECK_LIB([utempter], [utempter_remove_record],
                  [], [AC_MSG_ERROR([utempter_remove_record() required])])
     AC_DEFINE([USE_UTEMPTER], 1, [Define to 1 to use utempter.])
+
 elif test "x$ac_cv_header_utmpx_h" = xyes; then
     AC_MSG_NOTICE([using utmp])
     AC_DEFINE([USE_UTMPX], 1, [Define to 1 to use utmp.])