nulterminate      331 user/sh.c      struct cmd *nulterminate(struct cmd*);
nulterminate      346 user/sh.c        nulterminate(cmd);
nulterminate      477 user/sh.c          nulterminate(rcmd->cmd);
nulterminate      483 user/sh.c          nulterminate(pcmd->left);
nulterminate      484 user/sh.c          nulterminate(pcmd->right);
nulterminate      489 user/sh.c          nulterminate(lcmd->left);
nulterminate      490 user/sh.c          nulterminate(lcmd->right);
nulterminate      495 user/sh.c          nulterminate(bcmd->cmd);