dnl Check for "struct ucred" AC_MSG_CHECKING("struct ucred") AC_TRY_COMPILE( [ #define _GNU_SOURCE 1 #include <sys/socket.h> ], [ struct ucred red; ], have_ucred=yes , have_ucred=no ) if test "$have_ucred" = "yes"; then AC_DEFINE(HAVE_STRUCT_UCRED, 1, [Define if you have the struct ucred]) AC_MSG_RESULT(yes) else AC_MSG_RESULT(no) fi dnl Check for the group "nogroup" or "nobody" Use -2 otherwise. AC_MSG_CHECKING(nogroup) AC_TRY_RUN([ #include <grp.h> #include <sys/types.h> int main() { struct group *grp = getgrnam("nogroup"); if (grp) return 0; return 1; } ], nogroup=nogroup, AC_TRY_RUN([ #include <grp.h> #include <sys/types.h> int main() { struct group *grp = getgrnam("nobody"); if (grp) return 0; return 1; } ], nogroup=nobody, nogroup=65534, nogroup=65534), nogroup=65534) AC_MSG_RESULT($nogroup) AC_SUBST(nogroup) AC_CHECK_FUNCS(getpeereid) AC_ARG_WITH(sudo-tdesu-backend, AC_HELP_STRING([--with-sudo-tdesu-backend], [use sudo as backend for tdesu (default is su)]), [ if test x$withval = xyes; then use_tdesu_backend="sudo" else use_tdesu_backend="su" fi ], use_tdesu_backend="su" ) AC_DEFINE_UNQUOTED(DEFAULT_SUPER_USER_COMMAND, "$use_tdesu_backend", [Use su or sudo])