Mercurial > gnulib
view m4/faccessat.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 8 # See if we need to provide faccessat replacement. dnl Copyright (C) 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 Eric Blake. AC_DEFUN([gl_FUNC_FACCESSAT], [ AC_REQUIRE([gl_UNISTD_H_DEFAULTS]) AC_REQUIRE([gl_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK]) dnl Persuade glibc <unistd.h> to declare faccessat(). AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) AC_CHECK_FUNCS_ONCE([faccessat]) if test $ac_cv_func_faccessat = no; then HAVE_FACCESSAT=0 else case "$gl_cv_func_lstat_dereferences_slashed_symlink" in *yes) ;; *) REPLACE_FACCESSAT=1 ;; esac fi ]) # Prerequisites of lib/faccessat.c. AC_DEFUN([gl_PREREQ_FACCESSAT], [ AC_CHECK_FUNCS([access]) ])