for i := range iov {
		if iov[i].Len > 0 {
			return false
		}
	}
	return true
}

// Setrlimit sets a resource limit.
func Setrlimit(resource int, rlim *Rlimit) error {
	// Just call the syscall version, because as of Go 1.21
	// it will affect starting a new process.
	return syscall.Setrlimit(resource, (*syscall.Rlimit)(rlim))

type rlimit32 struct {
	Cur uint32
	Max uint32
}

//sysnb getrlimit(resource int, rlim *rlimit32) (err error) = SYS_GETRLIMIT

const rlimInf32 = ^uint32(0)
const rlimInf64 = ^uint64(0)

func Getrlimit(resource int, rlim *Rlimit) (err error) {
	err = prlimit(0, resource, nil, rlim)
	if err != ENOSYS {
		return err
	}

	rl := rlimit32{}
	err = getrlimit(resource, &rl)
	if err != nil {
		return
	}

	SYS_FPATHCONF              = 192 // { int fpathconf(int fd, int name); }
	SYS_GETRLIMIT              = 194 // { int getrlimit(u_int which, struct rlimit *rlp); } getrlimit __getrlimit_args int
	SYS_SETRLIMIT              = 195 // { int setrlimit(u_int which, struct rlimit *rlp); } setrlimit __setrlimit_args int
	SYS_MMAP                   = 197 // { caddr_t mmap(caddr_t addr, size_t len, int prot, int flags, int fd, int pad, off_t pos); }

	SYS_FPATHCONF                = 192 // { int fpathconf(int fd, int name); }
	SYS_GETRLIMIT                = 194 // { int getrlimit(u_int which, struct rlimit *rlp); } getrlimit __getrlimit_args int
	SYS_SETRLIMIT                = 195 // { int setrlimit(u_int which, struct rlimit *rlp); } setrlimit __setrlimit_args int

	SYS_FPATHCONF                = 192 // { int fpathconf(int fd, int name); }
	SYS_GETRLIMIT                = 194 // { int getrlimit(u_int which, struct rlimit *rlp); } getrlimit __getrlimit_args int
	SYS_SETRLIMIT                = 195 // { int setrlimit(u_int which, struct rlimit *rlp); } setrlimit __setrlimit_args int

	SYS_FPATHCONF                = 192 // { int fpathconf(int fd, int name); }
	SYS_GETRLIMIT                = 194 // { int getrlimit(u_int which, struct rlimit *rlp); } getrlimit __getrlimit_args int
	SYS_SETRLIMIT                = 195 // { int setrlimit(u_int which, struct rlimit *rlp); } setrlimit __setrlimit_args int

//sys	Setpriority(which int, who int, prio int) (err error)
//sys	Setprivexec(flag int) (err error)
//sysnb	Setregid(rgid int, egid int) (err error)
//sysnb	Setreuid(ruid int, euid int) (err error)
//sysnb	setrlimit(which int, lim *Rlimit) (err error)
//sysnb	Setsid() (pid int, err error)
//sysnb	Settimeofday(tp *Timeval) (err error)
//sysnb	Setuid(uid int) (err error)
//sys	Symlink(path string, link string) (err error)

	SYS_FPATHCONF                = 192 // { int fpathconf(int fd, int name); }
	SYS_GETRLIMIT                = 194 // { int getrlimit(u_int which, struct rlimit *rlp); } getrlimit __getrlimit_args int
	SYS_SETRLIMIT                = 195 // { int setrlimit(u_int which, struct rlimit *rlp); } setrlimit __setrlimit_args int

	SYS_FPATHCONF                = 192 // { int fpathconf(int fd, int name); }
	SYS_GETRLIMIT                = 194 // { int getrlimit(u_int which, struct rlimit *rlp); } getrlimit __getrlimit_args int
	SYS_SETRLIMIT                = 195 // { int setrlimit(u_int which, struct rlimit *rlp); } setrlimit __setrlimit_args int

	SYS_FPATHCONF                = 192 // { int fpathconf(int fd, int name); }
	SYS_GETRLIMIT                = 194 // { int getrlimit(u_int which, struct rlimit *rlp); } getrlimit __getrlimit_args int
	SYS_SETRLIMIT                = 195 // { int setrlimit(u_int which, struct rlimit *rlp); } setrlimit __setrlimit_args int