1 /* 2 * Copyright (c) 2024 Apple Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28 29 #include <darwintest.h> 30 #include <sys/wait.h> 31 #include <spawn.h> 32 33 T_GLOBAL_META( 34 T_META_NAMESPACE("xnu.sysctl"), 35 T_META_RADAR_COMPONENT_NAME("xnu"), 36 T_META_RADAR_COMPONENT_VERSION("sysctl"), 37 T_META_OWNER("p_tennen"), 38 T_META_TAG_VM_PREFERRED, 39 T_META_RUN_CONCURRENTLY(true) 40 ); 41 42 T_DECL(tree_walk, "Ensure we can walk a contrived sysctl tree") 43 { 44 // rdar://138698424 45 // Given a particular sysctl node tree (defined in-kernel) 46 // When we invoke the sysctl machinery to walk this tree 47 // (By specifying a partial path to the tree to the `sysctl` CLI tool - 48 // trying to use sysctlbyname won't trigger the walk we're interested in.) 49 char *args[] = { "/usr/sbin/sysctl", "debug.test.sysctl_node_test", NULL }; 50 int child_pid; 51 T_ASSERT_POSIX_ZERO(posix_spawn(&child_pid, args[0], NULL, NULL, args, NULL), "posix_spawn() sysctl"); 52 // And we give the child a chance to execute 53 int status = 0; 54 T_ASSERT_POSIX_SUCCESS(waitpid(child_pid, &status, 0), "waitpid"); 55 // Then the machine does not panic :} 56 T_PASS("The machine didn't panic, therefore our sysctl machinery can handle walking our node tree"); 57 } 58