left               37 sh.c             struct cmd *left;
left               43 sh.c             struct cmd *left;
left               95 sh.c                 runcmd(lcmd->left);
left              109 sh.c                 runcmd(pcmd->left);
left              224 sh.c           pipecmd(struct cmd *left, struct cmd *right)
left              231 sh.c             cmd->left = left;
left              237 sh.c           listcmd(struct cmd *left, struct cmd *right)
left              244 sh.c             cmd->left = left;
left              478 sh.c               nulterminate(pcmd->left);
left              484 sh.c               nulterminate(lcmd->left);