Mercurial > gnulib
view m4/chdir-long.m4 @ 40212:8da9577294da
unistr/*, uniconv/*: Fix undefined behaviour.
Reported by Jeffrey Walton <noloader@gmail.com>.
* lib/unistr/u-cpy.h (FUNC): Don't invoke memcpy with a zero size.
* lib/unistr/u-cpy-alloc.h (FUNC): Likewise.
* lib/uniconv/u8-conv-from-enc.c (u8_conv_from_encoding): Likewise.
* lib/uniconv/u8-conv-to-enc.c (u8_conv_to_encoding): Likewise.
author | Bruno Haible <bruno@clisp.org> |
---|---|
date | Sat, 09 Mar 2019 00:01:47 +0100 |
parents | b06060465f09 |
children |
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#serial 16 # Use Gnulib's robust chdir function. # It can handle arbitrarily long directory names, which means # that when it is given the name of an existing directory, it # never fails with ENAMETOOLONG. # Arrange to compile chdir-long.c only on systems that define PATH_MAX. dnl Copyright (C) 2004-2007, 2009-2019 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. # Written by Jim Meyering. AC_DEFUN([gl_FUNC_CHDIR_LONG], [ AC_REQUIRE([gl_PATHMAX_SNIPPET_PREREQ]) AC_CACHE_CHECK([whether this system has an arbitrary file name length limit], [gl_cv_have_arbitrary_file_name_length_limit], [AC_EGREP_CPP([have_arbitrary_file_name_length_limit], gl_PATHMAX_SNIPPET[ #ifdef PATH_MAX have_arbitrary_file_name_length_limit #endif], [gl_cv_have_arbitrary_file_name_length_limit=yes], [gl_cv_have_arbitrary_file_name_length_limit=no])]) ]) AC_DEFUN([gl_PREREQ_CHDIR_LONG], [:])