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/*
* mkdir*() pre-check.
*
* Copyright 1999-2009 Gentoo Foundation
* Licensed under the GPL-2
*/
bool sb_mkdirat_pre_check(const char *func, const char *pathname, int dirfd)
{
char canonic[SB_PATH_MAX];
save_errno();
/* XXX: need to check pathname with dirfd */
if (-1 == canonicalize(pathname, canonic))
/* see comments in check_syscall() */
if (ENAMETOOLONG != errno) {
if (is_env_on(ENV_SANDBOX_DEBUG))
SB_EINFO("EARLY FAIL", " %s(%s) @ canonicalize: %s\n",
func, pathname, strerror(errno));
return false;
}
/* XXX: Hack to prevent errors if the directory exist, and are
* not writable - we rather return EEXIST than fail. This can
* occur if doing something like `mkdir -p /`. We certainly do
* not want to pass this attempt up to the higher levels as those
* will trigger a sandbox violation.
*/
struct stat st;
if (0 == lstat(canonic, &st)) {
if (is_env_on(ENV_SANDBOX_DEBUG))
SB_EINFO("EARLY FAIL", " %s(%s[%s]) @ lstat: %s\n",
func, pathname, canonic, strerror(errno));
errno = EEXIST;
return false;
}
restore_errno();
return true;
}
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