left               37 user/sh.c        struct cmd *left;
left               43 user/sh.c        struct cmd *left;
left               96 user/sh.c            runcmd(lcmd->left);
left              110 user/sh.c            runcmd(pcmd->left);
left              224 user/sh.c      pipecmd(struct cmd *left, struct cmd *right)
left              231 user/sh.c        cmd->left = left;
left              237 user/sh.c      listcmd(struct cmd *left, struct cmd *right)
left              244 user/sh.c        cmd->left = left;
left              478 user/sh.c          nulterminate(pcmd->left);
left              484 user/sh.c          nulterminate(lcmd->left);