utimes(path, atime, mtime, callback) { callback(enosys()); },
		};
	}

	if (!globalThis.process) {
		globalThis.process = {
			getuid() { return -1; },
			getgid() { return -1; },
			geteuid() { return -1; },
			getegid() { return -1; },
			getgroups() { throw enosys(); },
			pid: -1,
			ppid: -1,
			umask() { throw enosys(); },
			cwd() { throw enosys(); },
			chdir() { throw enosys(); },

pkg syscall (netbsd-arm64-cgo), const SYS_GETEGID = 43
pkg syscall (netbsd-arm64-cgo), const SYS_GETEGID ideal-int
pkg syscall (netbsd-arm64-cgo), const SYS_GETEUID = 25
pkg syscall (netbsd-arm64-cgo), const SYS_GETEUID ideal-int
pkg syscall (netbsd-arm64-cgo), const SYS_GETFH = 395
pkg syscall (netbsd-arm64-cgo), const SYS_GETFH ideal-int
pkg syscall (netbsd-arm64-cgo), const SYS_GETGID = 47

pkg syscall (darwin-arm64-cgo), const SYS_GETPGRP = 81
pkg syscall (darwin-arm64-cgo), const SYS_GETPGRP ideal-int
pkg syscall (darwin-arm64-cgo), const SYS_GETPID = 20
pkg syscall (darwin-arm64-cgo), const SYS_GETPID ideal-int
pkg syscall (darwin-arm64-cgo), const SYS_GETPPID = 39
pkg syscall (darwin-arm64-cgo), const SYS_GETPPID ideal-int
pkg syscall (darwin-arm64-cgo), const SYS_GETPRIORITY = 100

		{call: "Setegid(0)", fn: func() error { return syscall.Setegid(0) }, filter: "Gid:", expect: "\t0\t0\t0\t0"},

		{call: "Seteuid(1)", fn: func() error { return syscall.Seteuid(1) }, filter: "Uid:", expect: "\t0\t1\t0\t1"},
		{call: "Setuid(0)", fn: func() error { return syscall.Setuid(0) }, filter: "Uid:", expect: "\t0\t0\t0\t0"},

pkg syscall (freebsd-arm64), const SYS_GETPGID = 207
pkg syscall (freebsd-arm64), const SYS_GETPGID ideal-int
pkg syscall (freebsd-arm64), const SYS_GETPGRP = 81
pkg syscall (freebsd-arm64), const SYS_GETPGRP ideal-int
pkg syscall (freebsd-arm64), const SYS_GETPID = 20
pkg syscall (freebsd-arm64), const SYS_GETPID ideal-int
pkg syscall (freebsd-arm64), const SYS_GETPPID = 39

pkg os, func FindProcess(int) (*Process, error)
pkg os, func Getegid() int
pkg os, func Getenv(string) string
pkg os, func Geteuid() int
pkg os, func Getgid() int
pkg os, func Getgroups() ([]int, error)
pkg os, func Getpagesize() int
pkg os, func Getpid() int
pkg os, func Getppid() int
pkg os, func Getuid() int
pkg os, func Getwd() (string, error)
pkg os, func Hostname() (string, error)

pkg syscall (freebsd-riscv64), const SYS_GETDTABLESIZE ideal-int #53466
pkg syscall (freebsd-riscv64), const SYS_GETEGID = 43 #53466
pkg syscall (freebsd-riscv64), const SYS_GETEGID ideal-int #53466
pkg syscall (freebsd-riscv64), const SYS_GETEUID = 25 #53466
pkg syscall (freebsd-riscv64), const SYS_GETEUID ideal-int #53466
pkg syscall (freebsd-riscv64), const SYS_GETFH = 161 #53466

pkg syscall (linux-amd64), const SYS_GETEGID = 108
pkg syscall (linux-amd64), const SYS_GETEUID = 107
pkg syscall (linux-amd64), const SYS_GETGID = 104
pkg syscall (linux-amd64), const SYS_GETGROUPS = 115
pkg syscall (linux-amd64), const SYS_GETITIMER = 36
pkg syscall (linux-amd64), const SYS_GETPEERNAME = 52
pkg syscall (linux-amd64), const SYS_GETPGID = 121
pkg syscall (linux-amd64), const SYS_GETPGRP = 111

			Typeflag: TypeFifo,
		},
		fm: 0600 | fs.ModeNamedPipe,
	}, {
		// setuid.
		h: &Header{
			Name:     "bin/su",
			Mode:     0755 | c_ISUID,
			Size:     23232,
			ModTime:  time.Unix(1355405093, 0),
			Typeflag: TypeReg,
		},
		fm: 0755 | fs.ModeSetuid,
	}, {
		// setguid.
		h: &Header{
			Name:     "group.txt",
			Mode:     0750 | c_ISGID,
			Size:     0,

	// Binary names can conflict.
	// E.g. template.test from the {html,text}/template packages.
	binName := filepath.Base(os.Args[1])
	deviceGotmp := fmt.Sprintf(deviceRoot+"/%s-%d", binName, os.Getpid())
	deviceGopath := deviceGotmp + "/gopath"
	defer adb("exec-out", "rm", "-rf", deviceGotmp) // Clean up.

	// Determine the package by examining the current working
	// directory, which will look something like