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              223 sh.c           pipecmd(struct cmd *left, struct cmd *right)
left              230 sh.c             cmd->left = left;
left              236 sh.c           listcmd(struct cmd *left, struct cmd *right)
left              243 sh.c             cmd->left = left;
left              477 sh.c               nulterminate(pcmd->left);
left              483 sh.c               nulterminate(lcmd->left);