1# getpass.m4 serial 11
2dnl Copyright (C) 2002-2003, 2005-2006, 2009 Free Software Foundation, Inc.
3dnl This file is free software; the Free Software Foundation
4dnl gives unlimited permission to copy and/or distribute it,
5dnl with or without modifications, as long as this notice is preserved.
6
7# Provide a getpass() function if the system doesn't have it.
8AC_DEFUN([gl_FUNC_GETPASS],
9[
10  AC_REPLACE_FUNCS([getpass])
11  AC_CHECK_DECLS_ONCE([getpass])
12  if test $ac_cv_func_getpass = no; then
13    gl_PREREQ_GETPASS
14  fi
15])
16
17# Provide the GNU getpass() implementation. It supports passwords of
18# arbitrary length (not just 8 bytes as on HP-UX).
19AC_DEFUN([gl_FUNC_GETPASS_GNU],
20[
21  AC_CHECK_DECLS_ONCE([getpass])
22  dnl TODO: Detect when GNU getpass() is already found in glibc.
23  AC_LIBOBJ([getpass])
24  gl_PREREQ_GETPASS
25  dnl We must choose a different name for our function, since on ELF systems
26  dnl an unusable getpass() in libc.so would override our getpass() if it is
27  dnl compiled into a shared library.
28  AC_DEFINE([getpass], [gnu_getpass],
29    [Define to a replacement function name for getpass().])
30])
31
32# Prerequisites of lib/getpass.c.
33AC_DEFUN([gl_PREREQ_GETPASS], [
34  AC_CHECK_HEADERS_ONCE([stdio_ext.h termios.h])
35  AC_CHECK_FUNCS_ONCE([__fsetlocking tcgetattr tcsetattr])
36  AC_CHECK_DECLS([__fsetlocking],,,
37    [#include <stdio.h>
38     #if HAVE_STDIO_EXT_H
39      #include <stdio_ext.h>
40     #endif])
41  AC_CHECK_DECLS_ONCE([fflush_unlocked])
42  AC_CHECK_DECLS_ONCE([flockfile])
43  AC_CHECK_DECLS_ONCE([fputs_unlocked])
44  AC_CHECK_DECLS_ONCE([funlockfile])
45  AC_CHECK_DECLS_ONCE([putc_unlocked])
46  :
47])
48