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/*
* unlinkat() wrapper.
*
* Copyright 1999-2008 Gentoo Foundation
* Licensed under the GPL-2
*/
#define WRAPPER_ARGS int dirfd, const char *pathname, int flags
extern int EXTERN_NAME(WRAPPER_ARGS);
static int (*WRAPPER_TRUE_NAME)(WRAPPER_ARGS) = NULL;
int WRAPPER_NAME(WRAPPER_ARGS)
{
int result = -1, old_errno = errno;
char canonic[SB_PATH_MAX];
if (-1 == canonicalize(pathname, canonic))
/* Path is too long to canonicalize, do not fail, but just let
* the real function handle it (see bug #94630 and #21766). */
if (ENAMETOOLONG != errno)
return -1;
/* XXX: Hack to make sure sandboxed process cannot remove
* a device node, bug #79836. */
if ((0 == strncmp(canonic, "/dev/null", 9)) ||
(0 == strncmp(canonic, "/dev/zero", 9))) {
errno = EACCES;
return result;
}
errno = old_errno;
if (FUNCTION_SANDBOX_SAFE_AT(dirfd, pathname)) {
check_dlsym(WRAPPER_TRUE_NAME, WRAPPER_SYMNAME,
WRAPPER_SYMVER);
result = WRAPPER_TRUE_NAME(dirfd, pathname, flags);
}
return result;
}
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