-# ttyname_r.m4 serial 5
-dnl Copyright (C) 2010 Free Software Foundation, Inc.
+# ttyname_r.m4 serial 9
+dnl Copyright (C) 2010-2012 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.
dnl ttyname_r().
AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+ AC_CHECK_DECLS_ONCE([ttyname_r])
+ if test $ac_cv_have_decl_ttyname_r = no; then
+ HAVE_DECL_TTYNAME_R=0
+ fi
+
AC_CHECK_FUNCS([ttyname_r])
if test $ac_cv_func_ttyname_r = no; then
HAVE_TTYNAME_R=0
else
- dnl On MacOS X 10.4 (and Solaris 10 without gl_USE_SYSTEM_EXTENSIONS)
+ HAVE_TTYNAME_R=1
+ dnl On Mac OS X 10.4 (and Solaris 10 without gl_USE_SYSTEM_EXTENSIONS)
dnl the return type is 'char *', not 'int'.
AC_CACHE_CHECK([whether ttyname_r is compatible with its POSIX signature],
[gl_cv_func_ttyname_r_posix],
dnl On Solaris 10, both ttyname_r functions (the one with the non-POSIX
dnl declaration and the one with the POSIX declaration) refuse to do
dnl anything when the output buffer is less than 128 bytes large.
+ dnl On OSF/1 5.1, ttyname_r ignores the buffer size and assumes the
+ dnl buffer is large enough.
AC_REQUIRE([AC_CANONICAL_HOST])
AC_CACHE_CHECK([whether ttyname_r works with small buffers],
[gl_cv_func_ttyname_r_works],
case "$host_os" in
# Guess no on Solaris.
solaris*) gl_cv_func_ttyname_r_works="guessing no" ;;
+ # Guess no on OSF/1.
+ osf*) gl_cv_func_ttyname_r_works="guessing no" ;;
# Guess yes otherwise.
*) gl_cv_func_ttyname_r_works="guessing yes" ;;
esac
fd = open ("/dev/tty", O_RDONLY);
if (fd < 0)
- result |= 1;
+ result |= 16;
else if (ttyname_r (fd, buf, sizeof (buf)) != 0)
- result |= 2;
+ result |= 17;
+ else if (ttyname_r (fd, buf, 1) == 0)
+ result |= 18;
return result;
}]])],
[gl_cv_func_ttyname_r_works=yes],
- [:],
+ [case $? in
+ 17 | 18) gl_cv_func_ttyname_r_works=no ;;
+ esac],
[:])
])
case "$gl_cv_func_ttyname_r_works" in
esac
fi
fi
- if test $HAVE_TTYNAME_R = 0 || test $REPLACE_TTYNAME_R = 1; then
- AC_LIBOBJ([ttyname_r])
- gl_PREREQ_TTYNAME_R
- fi
])
# Prerequisites of lib/ttyname_r.c.