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/*
* __openat_2() wrapper (_FORTIFY_SOURCE).
*
* Copyright 1999-2009 Gentoo Foundation
* Licensed under the GPL-2
*/
#ifndef WRAPPER_ARGS_PROTO /* let open() use us */
# define WRAPPER_ARGS_PROTO int dirfd, const char *pathname, int flags
# define WRAPPER_ARGS dirfd, pathname, flags
# define WRAPPER_SAFE() SB_SAFE_OPEN_INT_AT(dirfd, pathname, flags)
# define USE_AT 1
#else
# define USE_AT 0
#endif
#ifndef PRE_CHECK_FUNC
# define _PRE_CHECK_FUNC(x) sb_##x##_pre_check
# define PRE_CHECK_FUNC(x) _PRE_CHECK_FUNC(x)
#endif
static inline bool PRE_CHECK_FUNC(WRAPPER_NAME)(WRAPPER_ARGS_PROTO)
{
if (!(flags & O_CREAT)) {
/* If we're not trying to create, fail normally if
* file does not stat
*/
#if USE_AT
if (dirfd == AT_FDCWD || pathname[0] == '/')
#endif
#undef USE_AT
{
struct stat st;
save_errno();
if (-1 == stat(pathname, &st)) {
if (is_env_on(ENV_SANDBOX_DEBUG))
SB_EINFO("EARLY FAIL", " %s(%s): %s\n",
STRING_NAME, pathname, strerror(errno));
return false;
}
restore_errno();
}
}
return true;
}
#define WRAPPER_PRE_CHECKS() PRE_CHECK_FUNC(WRAPPER_NAME)(WRAPPER_ARGS)
#include "__wrapper_simple.c"
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