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wget/m4/getpass.m4

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# getpass.m4 serial 11
dnl Copyright (C) 2002-2003, 2005-2006, 2009 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],
[
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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],
[
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AC_CHECK_DECLS_ONCE([getpass])
dnl TODO: Detect when GNU getpass() is already found in glibc.
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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], [
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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])
:
])