SYS_GETPPID        = 39  // { pid_t sys_getppid(void); }
	SYS_LSTAT          = 40  // { int sys_lstat(const char *path, struct stat *ub); }
	SYS_DUP            = 41  // { int sys_dup(int fd); }
	SYS_FSTATAT        = 42  // { int sys_fstatat(int fd, const char *path, \
	SYS_GETEGID        = 43  // { gid_t sys_getegid(void); }

	SYS_MINCORE                 = 5026
	SYS_MADVISE                 = 5027
	SYS_SHMGET                  = 5028
	SYS_SHMAT                   = 5029
	SYS_SHMCTL                  = 5030
	SYS_DUP                     = 5031
	SYS_DUP2                    = 5032
	SYS_PAUSE                   = 5033
	SYS_NANOSLEEP               = 5034
	SYS_GETITIMER               = 5035
	SYS_SETITIMER               = 5036

	SYS_LOOKUP_DCOOKIE          = 18
	SYS_EVENTFD2                = 19
	SYS_EPOLL_CREATE1           = 20
	SYS_EPOLL_CTL               = 21
	SYS_EPOLL_PWAIT             = 22
	SYS_DUP                     = 23
	SYS_DUP3                    = 24
	SYS_FCNTL                   = 25
	SYS_INOTIFY_INIT1           = 26
	SYS_INOTIFY_ADD_WATCH       = 27
	SYS_INOTIFY_RM_WATCH        = 28
	SYS_IOCTL                   = 29

	SYS_MINCORE                 = 5026
	SYS_MADVISE                 = 5027
	SYS_SHMGET                  = 5028
	SYS_SHMAT                   = 5029
	SYS_SHMCTL                  = 5030
	SYS_DUP                     = 5031
	SYS_DUP2                    = 5032
	SYS_PAUSE                   = 5033
	SYS_NANOSLEEP               = 5034
	SYS_GETITIMER               = 5035
	SYS_SETITIMER               = 5036

	if pipe < nextfd {
		r1, _, _ = RawSyscall(SYS_DUP, uintptr(pipe), uintptr(nextfd), 0)
		if int32(r1) == -1 {
			goto childerror
		}
		pipe = nextfd
		nextfd++
	}
	for i = 0; i < len(fd); i++ {
		if fd[i] >= 0 && fd[i] < i {
			if nextfd == pipe { // don't stomp on pipe
				nextfd++
			}
			r1, _, _ = RawSyscall(SYS_DUP, uintptr(fd[i]), uintptr(nextfd), 0)
			if int32(r1) == -1 {

	SYS_GETPPID        = 39  // { pid_t sys_getppid(void); }
	SYS_LSTAT          = 40  // { int sys_lstat(const char *path, struct stat *ub); }
	SYS_DUP            = 41  // { int sys_dup(int fd); }
	SYS_FSTATAT        = 42  // { int sys_fstatat(int fd, const char *path, \
	SYS_GETEGID        = 43  // { gid_t sys_getegid(void); }

	SYS_NICE                    = 34
	SYS_SYNC                    = 36
	SYS_KILL                    = 37
	SYS_RENAME                  = 38
	SYS_MKDIR                   = 39
	SYS_RMDIR                   = 40
	SYS_DUP                     = 41
	SYS_PIPE                    = 42
	SYS_TIMES                   = 43
	SYS_BRK                     = 45
	SYS_SIGNAL                  = 48
	SYS_ACCT                    = 51

	SYS_NICE                    = 34
	SYS_SYNC                    = 36
	SYS_KILL                    = 37
	SYS_STAT                    = 38
	SYS_SENDFILE                = 39
	SYS_LSTAT                   = 40
	SYS_DUP                     = 41
	SYS_PIPE                    = 42
	SYS_TIMES                   = 43
	SYS_UMOUNT2                 = 45
	SYS_SETGID                  = 46
	SYS_GETGID                  = 47

	SYS_LOOKUP_DCOOKIE          = 18
	SYS_EVENTFD2                = 19
	SYS_EPOLL_CREATE1           = 20
	SYS_EPOLL_CTL               = 21
	SYS_EPOLL_PWAIT             = 22
	SYS_DUP                     = 23
	SYS_DUP3                    = 24
	SYS_FCNTL                   = 25
	SYS_INOTIFY_INIT1           = 26
	SYS_INOTIFY_ADD_WATCH       = 27
	SYS_INOTIFY_RM_WATCH        = 28
	SYS_IOCTL                   = 29

	SYS_MINCORE                 = 27
	SYS_MADVISE                 = 28
	SYS_SHMGET                  = 29
	SYS_SHMAT                   = 30
	SYS_SHMCTL                  = 31
	SYS_DUP                     = 32
	SYS_DUP2                    = 33
	SYS_PAUSE                   = 34
	SYS_NANOSLEEP               = 35
	SYS_GETITIMER               = 36
	SYS_ALARM                   = 37
	SYS_SETITIMER               = 38