Drop LIB_ACL_TRIVIAL.

[gnulib.git] / m4 / getpass.m4

diff --git a/m4/getpass.m4 b/m4/getpass.m4
index 2280921..54348ce 100644 (file)
--- a/m4/getpass.m4
+++ b/m4/getpass.m4
@@ -1,21 +1,47 @@
-# getpass.m4 serial 1
-dnl Copyright (C) 2002 Free Software Foundation, Inc.
-dnl This file is free software, distributed under the terms of the GNU
-dnl General Public License.  As a special exception to the GNU General
-dnl Public License, this file may be distributed as part of a program
-dnl that contains a configuration script generated by Autoconf, under
-dnl the same distribution terms as the rest of that program.
+# getpass.m4 serial 10
+dnl Copyright (C) 2002-2003, 2005-2006 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.
 
+# Provide a getpass() function if the system doesn't have it.
 AC_DEFUN([gl_FUNC_GETPASS],
 [
   AC_REPLACE_FUNCS(getpass)
+  AC_CHECK_DECLS_ONCE(getpass)
   if test $ac_cv_func_getpass = no; then
     gl_PREREQ_GETPASS
   fi
 ])
 
+# Provide the GNU getpass() implementation. It supports passwords of
+# arbitrary length (not just 8 bytes as on HP-UX).
+AC_DEFUN([gl_FUNC_GETPASS_GNU],
+[
+  AC_CHECK_DECLS_ONCE(getpass)
+  dnl TODO: Detect when GNU getpass() is already found in glibc.
+  AC_LIBOBJ(getpass)
+  gl_PREREQ_GETPASS
+  dnl We must choose a different name for our function, since on ELF systems
+  dnl an unusable getpass() in libc.so would override our getpass() if it is
+  dnl compiled into a shared library.
+  AC_DEFINE([getpass], [gnu_getpass],
+    [Define to a replacement function name for getpass().])
+])
+
 # Prerequisites of lib/getpass.c.
 AC_DEFUN([gl_PREREQ_GETPASS], [
+  AC_CHECK_HEADERS_ONCE(stdio_ext.h termios.h)
+  AC_CHECK_FUNCS_ONCE(__fsetlocking tcgetattr tcsetattr)
+  AC_CHECK_DECLS([__fsetlocking],,,
+    [#include <stdio.h>
+     #if HAVE_STDIO_EXT_H
+      #include <stdio_ext.h>
+     #endif])
+  AC_CHECK_DECLS_ONCE([fflush_unlocked])
+  AC_CHECK_DECLS_ONCE([flockfile])
+  AC_CHECK_DECLS_ONCE([fputs_unlocked])
+  AC_CHECK_DECLS_ONCE([funlockfile])
+  AC_CHECK_DECLS_ONCE([putc_unlocked])
   :
 ])
-