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#include <darwintest.h>
#include <sys/wait.h>
#include <spawn.h>
T_GLOBAL_META(
T_META_NAMESPACE("xnu.sysctl"),
T_META_RADAR_COMPONENT_NAME("xnu"),
T_META_RADAR_COMPONENT_VERSION("sysctl"),
T_META_OWNER("p_tennen"),
T_META_TAG_VM_PREFERRED,
T_META_RUN_CONCURRENTLY(true)
);
T_DECL(tree_walk, "Ensure we can walk a contrived sysctl tree")
{
// rdar://138698424
// Given a particular sysctl node tree (defined in-kernel)
// When we invoke the sysctl machinery to walk this tree
// (By specifying a partial path to the tree to the `sysctl` CLI tool -
// trying to use sysctlbyname won't trigger the walk we're interested in.)
char *args[] = { "/usr/sbin/sysctl", "debug.test.sysctl_node_test", NULL };
int child_pid;
T_ASSERT_POSIX_ZERO(posix_spawn(&child_pid, args[0], NULL, NULL, args, NULL), "posix_spawn() sysctl");
// And we give the child a chance to execute
int status = 0;
T_ASSERT_POSIX_SUCCESS(waitpid(child_pid, &status, 0), "waitpid");
// Then the machine does not panic :}
T_PASS("The machine didn't panic, therefore our sysctl machinery can handle walking our node tree");
}