# getpass.m4 serial 16

dnl Copyright (C) 2002-2003, 2005-2006, 2009-2020 Free Software Foundation,

dnl 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_ONCE([gl_FUNC_GETPASS],

[

  AC_REQUIRE([gl_UNISTD_H_DEFAULTS])

  dnl Persuade Solaris <unistd.h> and <stdlib.h> to declare getpass().

  AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])

  AC_CHECK_FUNCS_ONCE([getpass])

  if test $ac_cv_func_getpass = no; then

    HAVE_GETPASS=0

  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_REQUIRE([gl_UNISTD_H_DEFAULTS])

  AC_REQUIRE([gl_FUNC_GETPASS])

  if test $ac_cv_func_getpass = yes; then

    AC_CACHE_CHECK([for getpass without length limitations],

      [gl_cv_func_getpass_good],

      [AC_EGREP_CPP([Lucky GNU user],

         [

#include <features.h>

#ifdef __GNU_LIBRARY__

 #if (__GLIBC__ >= 2) && !defined __UCLIBC__

  Lucky GNU user

 #endif

#endif

         ],

         [gl_cv_func_getpass_good=yes],

         [gl_cv_func_getpass_good=no])

      ])

    if test $gl_cv_func_getpass_good != yes; then

      REPLACE_GETPASS=1

    fi

  fi

])

# Prerequisites of lib/getpass.c.

AC_DEFUN([gl_PREREQ_GETPASS], [

  AC_CHECK_HEADERS_ONCE([stdio_ext.h termios.h])

  AC_CHECK_FUNCS_ONCE([__fsetlocking])

  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])

  dnl We can't use AC_CHECK_FUNC here, because tcgetattr() is defined as a

  dnl static inline function when compiling for Android 4.4 or older.

  AC_CACHE_CHECK([for tcgetattr], [gl_cv_func_tcgetattr],

    [AC_LINK_IFELSE(

       [AC_LANG_PROGRAM(

          [[#include <termios.h>

            struct termios x;

          ]],

          [[return tcgetattr(0,&x);]])

       ],

       [gl_cv_func_tcgetattr=yes],

       [gl_cv_func_tcgetattr=no])

    ])

  if test $gl_cv_func_tcgetattr = yes; then

    HAVE_TCGETATTR=1

  else

    HAVE_TCGETATTR=0

  fi

  AC_DEFINE_UNQUOTED([HAVE_TCGETATTR], [$HAVE_TCGETATTR],

    [Define to 1 if the system has the 'tcgetattr' function.])

  dnl We can't use AC_CHECK_FUNC here, because tcsetattr() is defined as a

  dnl static inline function when compiling for Android 4.4 or older.

  AC_CACHE_CHECK([for tcsetattr], [gl_cv_func_tcsetattr],

    [AC_LINK_IFELSE(

       [AC_LANG_PROGRAM(

          [[#include <termios.h>

            struct termios x;

          ]],

          [[return tcsetattr(0,0,&x);]])

       ],

       [gl_cv_func_tcsetattr=yes],

       [gl_cv_func_tcsetattr=no])

    ])

  if test $gl_cv_func_tcsetattr = yes; then

    HAVE_TCSETATTR=1

  else

    HAVE_TCSETATTR=0

  fi

  AC_DEFINE_UNQUOTED([HAVE_TCSETATTR], [$HAVE_TCSETATTR],

    [Define to 1 if the system has the 'tcsetattr' function.])

])