/*-
* Copyright (c) 2006 nCircle Network Security, Inc.
* Copyright (c) 2007 Robert N. M. Watson
* All rights reserved.
*
* This software was developed by Robert N. M. Watson for the TrustedBSD
* Project under contract to nCircle Network Security, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR, NCIRCLE NETWORK SECURITY,
* INC., OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Test that privilege is required to lower nice value; first test with, then
* without. There are two failure modes associated with privilege: the right
* to renice a process with a different uid, and the right to renice to a
* lower priority. Because both the real and effective uid are part of the
* permissions test, we have to create two children processes with different
* uids.
*/
#include <sys/types.h>
#include <sys/resource.h>
#include <sys/wait.h>
#include <err.h>
#include <errno.h>
#include <signal.h>
#include <stdlib.h>
#include <unistd.h>
#include "main.h"
static int childproc_running;
static pid_t childproc;
int
priv_sched_setpriority_setup(int asroot, int injail, struct test *test)
{
int another_uid, need_child;
/*
* Some tests require a second process with specific credentials.
* Set that up here, and kill in cleanup.
*/
need_child = 0;
if (test->t_test_func == priv_sched_setpriority_aproc) {
need_child = 1;
another_uid = 1;
}
if (test->t_test_func == priv_sched_setpriority_myproc)
need_child = 1;
if (need_child) {
childproc = fork();
if (childproc < 0) {
warn("priv_sched_setup: fork");
return (-1);
}
if (childproc == 0) {
if (another_uid) {
if (setresuid(UID_THIRD, UID_THIRD,
UID_THIRD) < 0)
err(-1, "setresuid(%d)", UID_THIRD);
}
while (1)
sleep(1);
}
childproc_running = 1;
sleep(1); /* Allow dummy thread to change uids. */
}
return (0);
}
void
priv_sched_setpriority_curproc(int asroot, int injail, struct test *test)
{
int error;
error = setpriority(PRIO_PROCESS, 0, -1);
if (asroot && injail)
expect("priv_sched_setpriority_curproc(asroot, injail)",
error, -1, EACCES);
if (asroot && !injail)
expect("priv_sched_setpriority_curproc(asroot, !injail)",
error, 0, 0);
if (!asroot && injail)
expect("priv_sched_setpriority_curproc(!asroot, injail)",
error, -1, EACCES);
if (!asroot && !injail)
expect("priv_sched_setpriority_curproc(!asroot, !injail)",
error, -1, EACCES);
}
void
priv_sched_setpriority_myproc(int asroot, int injail, struct test *test)
{
int error;
error = setpriority(PRIO_PROCESS, 0, -1);
if (asroot && injail)
expect("priv_sched_setpriority_myproc(asroot, injail)",
error, -1, EACCES);
if (asroot && !injail)
expect("priv_sched_setpriority_myproc(asroot, !injail)",
error, 0, 0);
if (!asroot && injail)
expect("priv_sched_setpriority_myproc(!asroot, injail)",
error, -1, EACCES);
if (!asroot && !injail)
expect("priv_sched_setpriority_myproc(!asroot, !injail)",
error, -1, EACCES);
}
void
priv_sched_setpriority_aproc(int asroot, int injail, struct test *test)
{
int error;
error = setpriority(PRIO_PROCESS, 0, -1);
if (asroot && injail)
expect("priv_sched_setpriority_aproc(asroot, injail)",
error, -1, EACCES);
if (asroot && !injail)
expect("priv_sched_setpriority_aproc(asroot, !injail)",
error, 0, 0);
if (!asroot && injail)
expect("priv_sched_setpriority_aproc(!asroot, injail)",
error, -1, EACCES);
if (!asroot && !injail)
expect("priv_sched_setpriority_aproc(!asroot, !injail)",
error, -1, EACCES);
}
void
priv_sched_setpriority_cleanup(int asroot, int injail, struct test *test)
{
pid_t pid;
if (childproc_running) {
(void)kill(childproc, SIGKILL);
while (1) {
pid = waitpid(childproc, NULL, 0);
if (pid == -1)
warn("waitpid(%d (test), NULL, 0)",
childproc);
if (pid == childproc)
break;
}
childproc_running = 0;
childproc = -1;
}
}
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