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https://github.com/SEPPDROID/Digital-Research-Source-Code.git
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420 lines
10 KiB
Plaintext
420 lines
10 KiB
Plaintext
$title ('ERAQ: Erase File with Query')
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eraseq:
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do;
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/*
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Revised:
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19 Jan 80 by Thomas Rolander
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20 July 81 by Doug Huskey
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6 Aug 81 by Danny Horovitz
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31 Jan 83 by Bill Fitler
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*/
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$include (:f2:copyrt.lit)
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$include (:f2:vaxcmd.lit)
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$include (:f2:vermpm.lit)
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declare
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true literally '1',
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false literally '0',
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forever literally 'while true',
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lit literally 'literally',
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proc literally 'procedure',
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dcl literally 'declare',
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addr literally 'address',
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cr literally '13',
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lf literally '10',
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ctrlc literally '3',
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ctrlx literally '18h',
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bksp literally '8';
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/**************************************
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* *
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* B D O S INTERFACE *
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* *
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**************************************/
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mon1:
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procedure (func,info) external;
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declare func byte;
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declare info address;
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end mon1;
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mon2:
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procedure (func,info) byte external;
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declare func byte;
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declare info address;
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end mon2;
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mon3:
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procedure (func,info) address external;
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declare func byte;
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declare info address;
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end mon3;
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declare cmdrv byte external; /* command drive */
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declare fcb (1) byte external; /* 1st default fcb */
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declare fcb16 (1) byte external; /* 2nd default fcb */
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declare pass0 address external; /* 1st password ptr */
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declare len0 byte external; /* 1st passwd length */
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declare pass1 address external; /* 2nd password ptr */
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declare len1 byte external; /* 2nd passwd length */
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declare tbuff (1) byte external; /* default dma buffer */
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/**************************************
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* *
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* B D O S Externals *
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* *
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**************************************/
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read$console:
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procedure byte;
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return mon2 (1,0);
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end read$console;
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printchar:
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procedure(char);
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declare char byte;
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call mon1(2,char);
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end printchar;
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conin:
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procedure byte;
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return mon2(6,0fdh);
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end conin;
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print$buf:
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procedure (buffer$address);
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declare buffer$address address;
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call mon1 (9,buffer$address);
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end print$buf;
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check$con$stat:
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procedure byte;
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return mon2(11,0);
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end check$con$stat;
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version: procedure address;
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/* returns current cp/m version # */
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return mon3(12,0);
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end version;
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setdma: procedure(dma);
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declare dma address;
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call mon1(26,dma);
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end setdma;
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search$first:
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procedure (fcb$address) byte;
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declare fcb$address address;
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return mon2 (17,fcb$address);
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end search$first;
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search$next:
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procedure byte;
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return mon2 (18,0);
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end search$next;
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delete$file:
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procedure (fcb$address) address;
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declare fcb$address address;
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return mon3 (19,fcb$address);
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end delete$file;
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get$user$code:
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procedure byte;
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return mon2 (32,0ffh);
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end get$user$code;
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/* 0ff => return BDOS errors */
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return$errors:
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procedure;
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call mon1 (45,0ffh);
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end return$errors;
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terminate:
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procedure;
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call mon1 (143,0);
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end terminate;
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declare
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parse$fn structure (
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buff$adr address,
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fcb$adr address);
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declare (saveax,savecx) word external; /* reg return vals, set in mon1 */
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parse: procedure;
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declare (retcode,errcode) word;
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call mon1(152,.parse$fn);
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retcode = saveax;
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errcode = savecx;
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if retcode = 0ffffh then /* parse returned an error */
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do;
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call print$buf(.('Invalid Filespec$'));
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if errcode = 23 then call print$buf(.(' (drive)$'));
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else if errcode = 24 then call print$buf(.(' (filename)$'));
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else if errcode = 25 then call print$buf(.(' (filetype)$'));
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else if errcode = 38 then call print$buf(.(' (password)$'));
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call print$buf(.('.',13,10,'$')); call terminate;
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end;
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end parse;
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/**************************************
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* *
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* GLOBAL VARIABLES *
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* *
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**************************************/
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declare xfcb byte initial(0);
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declare successful lit '0FFh';
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declare dir$entries (128) structure (
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file (12) byte );
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declare dir$entry$adr address;
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declare dir$entry based dir$entry$adr (1) byte;
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/**************************************
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* *
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* S U B R O U T I N E S *
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* *
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**************************************/
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/* upper case character from console */
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crlf: proc;
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call printchar(cr);
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call printchar(lf);
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end crlf;
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/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
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/* fill string @ s for c bytes with f */
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fill: proc(s,f,c);
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dcl s addr,
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(f,c) byte,
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a based s byte;
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do while (c:=c-1)<>255;
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a = f;
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s = s+1;
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end;
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end fill;
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/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
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/* error message routine */
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error: proc(code);
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declare
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code byte;
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call printchar(' ');
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if code=1 then
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call print$buf(.(cr,lf,'Disk I/O Error.$'));
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if code=2 then
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call print$buf(.(cr,lf,'Drive $'));
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if code = 3 or code = 2 then
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call print$buf(.('Read Only$'));
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if code = 4 then
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call print$buf(.(cr,lf,'Invalid Filespec (drive).$'));
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if code = 5 then
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call print$buf(.('Currently Opened$'));
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if code = 7 then
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call print$buf(.('Password Error$'));
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if code < 3 or code = 4 then
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call terminate;
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end error;
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/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
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/* try to delete fcb at fcb$address
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return error code if unsuccessful */
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delete:
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procedure(fcb$address) byte;
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declare
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fcb$address address,
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fcbv based fcb$address (32) byte,
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error$code address,
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code byte;
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if xfcb then
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fcbv(5) = fcbv(5) or 80h;
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call setdma(.fcb16); /* password */
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fcbv(0) = fcb(0); /* drive */
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error$code = delete$file(fcb$address);
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fcbv(5) = fcbv(5) and 7fh; /* reset xfcb bit */
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if low(error$code) = 0FFh then do;
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code = high(error$code);
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if (code=1) or (code=2) then
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call error(code);
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return code;
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end;
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return successful;
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end delete;
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/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
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/* upper case character from console */
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ucase: proc byte;
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dcl c byte;
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if (c:=conin) >= 'a' then
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if c < '{' then
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return(c-20h);
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return c;
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end ucase;
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/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
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/* get password and place at fcb + 16 */
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getpasswd: proc;
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dcl (i,c) byte;
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call print$buf(.('Password ? ','$'));
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retry:
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call fill(.fcb16,' ',8);
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do i = 0 to 7;
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nxtchr:
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if (c:=ucase) >= ' ' then
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fcb16(i)=c;
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if c = cr then
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goto exit;
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if c = ctrlx then
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goto retry;
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if c = bksp then do;
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if i<1 then
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goto retry;
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else do;
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fcb16(i:=i-1)=' ';
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goto nxtchr;
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end;
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end;
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if c = 3 then
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call terminate;
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end;
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exit:
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c = check$con$stat;
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end getpasswd;
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/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
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/* error on deleting a file */
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file$err: procedure(code);
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declare code byte;
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call crlf;
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call print$buf(.('Not erased, $'));
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call error(code);
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call crlf;
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end file$err;
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/**************************************
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* *
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* M A I N P R O G R A M *
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* *
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**************************************/
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declare (i,j,k,code,response,user,dcnt) byte;
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declare ver address;
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declare last$dseg$byte byte
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initial (0);
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plm$start: procedure public;
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ver = version;
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if low(ver) < Ver$BDOS or (high(ver) and Ver$Mask) = 0 then do;
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call print$buf (.(cr,lf,Ver$Needs$OS,'$'));
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call mon1(0,0);
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end;
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if fcb(17) <> ' ' then
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if fcb(17) = 'X' then
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xfcb = true;
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else do;
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call print$buf (.(
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'Invalid Command Option.$'));
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call terminate;
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end;
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parse$fn.buff$adr = .tbuff(1);
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parse$fn.fcb$adr = .fcb;
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call parse;
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if fcb(0) = 0 then
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fcb(0) = low (mon2 (25,0)) + 1;
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i = -1;
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user = get$user$code;
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call return$errors;
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dcnt = search$first (.fcb);
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do while dcnt <> 0ffh;
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dir$entry$adr = .tbuff(ror(dcnt,3) and 110$0000b);
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if dir$entry(0) = user then
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do;
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if (i:=i+1) = 128 then
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do;
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call print$buf (.(
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'Too many directory entries for query.','$'));
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call terminate;
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end;
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call move (12,.dir$entry(1),.dir$entries(i));
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end;
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dcnt = search$next;
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end;
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if i = -1 then
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do;
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call print$buf (.(
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'File Not Found.','$'));
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end;
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else
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do j = 0 to i;
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call printchar ('A'+fcb(0)-1);
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call printchar (':');
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call printchar (' ');
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do k = 0 to 10;
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if k = 8
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then call printchar ('.');
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call printchar (dir$entries(j).file(k) and 07FH);
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end;
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call printchar (' ');
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call printchar ('?');
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response = read$console;
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call printchar (0dh);
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call printchar (0ah);
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if (response = 'y') or
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(response = 'Y') then
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do;
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call move (12,.dir$entries(j),.fcb(1));
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if (code:=delete(.fcb)) <> successful then do;
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if code < 3 or code = 4 then
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call error(code); /* fatal errors */
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else if code = 7 then do;
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call file$err(code);
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call getpasswd;
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code = delete(.fcb);
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end;
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if code <> successful then
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call file$err(code);
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call crlf;
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end;
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end;
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end;
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call terminate;
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end plm$start;
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end eraseq;
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