nulterminate      326 user/sh.c      struct cmd *nulterminate(struct cmd*);
nulterminate      341 user/sh.c        nulterminate(cmd);
nulterminate      472 user/sh.c          nulterminate(rcmd->cmd);
nulterminate      478 user/sh.c          nulterminate(pcmd->left);
nulterminate      479 user/sh.c          nulterminate(pcmd->right);
nulterminate      484 user/sh.c          nulterminate(lcmd->left);
nulterminate      485 user/sh.c          nulterminate(lcmd->right);
nulterminate      490 user/sh.c          nulterminate(bcmd->cmd);