error Illegal colon Undefined label referenced Syntax error Illegal constant Left curly-brace mismatched somewhere in_diflag, _doflag; /* flag if directed I/O being used */ char _pipef, *_pipedest; /* true if a pipe is being filled */ char **_savei, **_nullpos; /* used to remember position in command line when piping */ char _dibuf[BUFSIZ], _dobuf[BUFSIZ]; /* I/O buffers used for direction */