snippet/warn-on-use: Fix indentation.

[gnulib.git] / m4 / mknod.m4

diff --git a/m4/mknod.m4 b/m4/mknod.m4
index c2496dc..a867743 100644 (file)
--- a/m4/mknod.m4
+++ b/m4/mknod.m4
@@ -1,7 +1,7 @@
-# serial 1
+# serial 4
 # See if we need to provide mknod replacement.
 
-dnl Copyright (C) 2009 Free Software Foundation, Inc.
+dnl Copyright (C) 2009-2011 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.
@@ -16,7 +16,6 @@ AC_DEFUN([gl_FUNC_MKNOD],
   AC_CHECK_FUNCS_ONCE([mknod])
   if test $ac_cv_func_mknod = no; then
     HAVE_MKNOD=0
-    AC_LIBOBJ([mknod])
   else
     dnl Detect BSD bug, where mknod requires root privileges to create fifo.
     AC_CACHE_CHECK([whether mknod can create fifo without root privileges],
@@ -27,9 +26,14 @@ AC_DEFUN([gl_FUNC_MKNOD],
              #include <unistd.h>
 ]], [[/* Indeterminate for super-user, assume no.  Why are you running
          configure as root, anyway?  */
-      if (!geteuid ()) return 1;
+      if (!geteuid ()) return 99;
       if (mknod ("conftest.fifo", S_IFIFO | 0600, 0)) return 2;]])],
-         [gl_cv_func_mknod_works=yes], [gl_cv_func_mknod_works=no],
+         [gl_cv_func_mknod_works=yes],
+         [if test $? = 99 && test x"$FORCE_UNSAFE_CONFIGURE" = x; then
+            AC_MSG_FAILURE([you should not run configure as root ]dnl
+[(set FORCE_UNSAFE_CONFIGURE=1 in environment to bypass this check)])
+          fi
+          gl_cv_func_mknod_works=no],
          [gl_cv_func_mknod_works="guessing no"])
        rm -f conftest.fifo])
     if test "$gl_cv_func_mknod_works" != yes; then
@@ -39,7 +43,6 @@ AC_DEFUN([gl_FUNC_MKNOD],
     dnl Systems that mishandle trailing slash on mkfifo also goof on mknod.
     if test $REPLACE_MKFIFO = 1 || test "$gl_cv_func_mknod_works" != yes; then
       REPLACE_MKNOD=1
-      AC_LIBOBJ([mknod])
     fi
   fi
 ])