Category : Pascal Source Code
Archive   : SOFTOOLS.ZIP
Filename : INITCMD.PAS

{initcmd.pas}

{
Copyright (c) 1981
By: Bell Telephone Laboratories, Inc. and
Whitesmith's Ltd.,

This software is derived from the book
"Software Tools in Pascal", by
Brian W. Kernighan and P. J. Plauger
Addison-Wesley, 1981
ISBN 0-201-10342-7

Right is hereby granted to freely distribute or duplicate this
software, providing distribution or duplication is not for profit
or other commercial gain and that this copyright notice remains
intact.
}

PROCEDURE INITCMD;
VAR
FD:FILEDESC;
FNAME:XSTRING;
FT:FILTYP;
IDX:1..MAXSTR;
I,JSKIP:INTEGER;
JUNK:BOOLEAN;


BEGIN
CMDFIL[STDIN]:=STDIO;
CMDFIL[STDOUT]:=STDIO;
CMDFIL[STDERR]:=STDIO;
FOR FD:=SUCC(STDERR) TO MAXOPEN DO
CMDFIL[FD]:=CLOSED;
WRITELN;
write('$ ');
FOR FT:= FIL1 TO FIL4 DO
CMDOPEN[FT]:=FALSE;
KBDN:=0;
if (not getline(cmdlin,STDIN,MAXSTR)) then error('NO CMDLINE');
CMDARGS:=0;
JSKIP:=0;
IDX:=1;
WHILE ((CMDLIN[IDX]<>ENDSTR)
AND(CMDLIN[IDX]<>NEWLINE)) DO BEGIN
WHILE((CMDLIN[IDX]=BLANK)AND(JSKIP MOD 2 <>1))DO
IDX:=IDX+1;
IF(CMDLIN[IDX]<>NEWLINE) THEN BEGIN
CMDARGS:=CMDARGS+1;
CMDIDX[CMDARGS]:=IDX-JSKIP;
WHILE((CMDLIN[IDX]<>NEWLINE)AND
((CMDLIN[IDX]<>BLANK)OR(JSKIP MOD 2 <>0)))DO BEGIN
IF (CMDLIN[IDX]=DQUOTE)THEN BEGIN
JSKIP:=JSKIP+1;
IDX:=IDX+1
END
ELSE BEGIN
CMDLIN[IDX-JSKIP]:=CMDLIN[IDX];
IDX:=IDX+1
END

END;
CMDLIN[IDX-JSKIP]:=ENDSTR;
IDX:=IDX+1;
IF (CMDLIN[CMDIDX[CMDARGS]]=LESS) THEN BEGIN
XCLOSE(STDIN);
CMDIDX[CMDARGS]:=CMDIDX[CMDARGS]+1;
JUNK:=GETARG(CMDARGS,FNAME,MAXSTR);
FD:=MUSTOPEN(FNAME,IOREAD);
CMDARGS:=CMDARGS-1;
END
ELSE IF (CMDLIN[CMDIDX[CMDARGS]]=GREATER) THEN BEGIN
XCLOSE(STDOUT);
CMDIDX[CMDARGS]:=CMDIDX[CMDARGS]+1;
JUNK:=GETARG(CMDARGS,FNAME,MAXSTR);
FD:=MUSTCREATE(FNAME,IOWRITE);
CMDARGS:=CMDARGS-1;
END
END
END;
END;