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|
;AN000;bgb
page ,132 ;
TITLE RECINIT.SAL - MS-DOS File/Disk Recovery Utility
;*****************************************************************************
;*****************************************************************************
; Include files
;*****************************************************************************
;
.xlist
include pathmac.inc
INCLUDE RECSEG.INC ;AN000;bgb
INCLUDE DOSSYM.INC ;AN000;BGB
INCLUDE SYSCALL.INC ;AN000;BGB
INCLUDE RECEQU.INC ;AN000;BGB
INCLUDE RECMACRO.INC ;AN000;BGB
INCLUDE RECPARSE.INC ;AN000;BGB
.list
;
;*****************************************************************************
; External Data Declarations
;*****************************************************************************
data segment public para 'Data' ;an000;bgb
EXTRN movsi:word ;move si pointer here for display of invalid parm ;an031;bgb
extrn command_line_buffer:byte ;AN000;bgb
extrn ExitStatus:Byte ;AN000;bgb
Extrn FATTbl:byte
Extrn SubstErr:Byte
Extrn NotNetM:Byte
Extrn User_Drive:Byte ;AN000;BGB
Extrn Baddrv:Byte
Extrn Drive_Letter_Msg:Byte ;AN000;BGB
Extrn Parse_Error_Msg:Byte
extrn fname_buffer:byte ;AN000;BGB
extrn PSP_Segment:word ;AN000;bgb
extrn fatal_error:byte ;AN000;bgb
extrn found:byte ;AN000;bgb
extrn done:byte ;AN000;bgb
extrn bpb_buffer:byte ;AN000;bgb
extrn data_start_low:word ;AN000;bgb
extrn data_start_high:word ;AN000;bgb
extrn driveletter:byte ;AN000;bgb
extrn drive:byte ;AN000;bgb
extrn transrc:byte ;AN000;bgb
extrn int_23_old_off:word ;AN000;bgb
extrn int_23_old_seg:word ;AN000;bgb
extrn int_24_old_off:word ;AN000;bgb
extrn int_24_old_seg:word ;AN000;bgb
extrn append:byte ;AN000;bgb
ifdef fsexec
extrn fat12_string:byte ;AN000;bgb
extrn fat16_string:byte ;AN000;bgb
extrn media_id_buffer:byte ;AN000;bgb
extrn fs_not_fat:byte ;AN000;bgb ;an022;bgb
extrn FS_String_Buffer:Byte ;AN011;bgb ;an022;bgb
extrn FS_String_end:Byte ;AN011;bgb ;an022;bgb
endif
data ends ;an000;bgb
code segment public para 'CODE' ;an000;bgb
pathlabl recinit
;*****************************************************************************
; recinit procedures
;*****************************************************************************
public Main_Init, Init_Io, Preload_Messages, Parse_recover
public Parse_good, Parse_err, Validate_Target_Drive
public Check_Target_Drive, Check_For_Network, Check_Translate_Drive
public Hook_interrupts, Clear_Append_X, RECOVER_IFS, Reset_Append_X
public exitpgm ;an026;bgb
;*****************************************************************************
; External Routine Declarations
;*****************************************************************************
; Extrn EXEC_FS_Recover:Near ;an022;bgb
Extrn SysLoadMsg:Near
Extrn SysDispMsg:Near
Extrn Main_Routine:Near
Extrn INT_23:Near
Extrn INT_24:Near
;*****************************************************************************
;Routine name: MAIN_INIT
;*****************************************************************************
;
;description: Main routine for recover program
;
;Called Procedures: get_psp
; Init_IO
; Validate_Target_Drive
; Hook_Interrupts
; RECOVER_IFS (goes to main-routine)
;
;Input: None
;
;Output: None
;
;Change History: Created 5/8/87 MT
;
;Psuedocode
;----------
; get info from psp
; Parse input and load messages (CALL Init_Input_Output)
; IF no error
; Check target drive letter (CALL Validate_Target_Drive)
; IF no error
; Set up Control Break (CALL Hook_Interrupts)
; IF no error
; CALL RECOVER_IFS (goes to main routine)
; ENDIF
; ENDIF
; ENDIF
; Exit program
;*****************************************************************************
procedure Main_Init ;;AN000;
xor bp,bp
Set_Data_Segment ;Set DS,ES to Data segment ;AN000;bgb
call get_psp
mov Fatal_Error,No ;Init the error flag ;AN000;
call Init_Io ;Setup messages and parse ;AN000;
cmp Fatal_Error,Yes ;Error occur? ;AN000;
; $IF NE ;Nope, keep going ;AN000;
JE $$IF1
call Validate_Target_Drive ;Check drive letter ;AN000;
cmp Fatal_Error,Yes ;Error occur? ;AN000;
; $IF NE ;Nope, keep going ;AN000;
JE $$IF2
call Hook_Interrupts ;Set CNTRL -Break hook ;AN000;
cmp Fatal_Error,Yes ;Error occur? ;AN000;
; $IF NE ;Nope, keep going ;AN000;
JE $$IF3
call RECOVER_IFS ;RECOVER correct file system ;AN000;
; $ENDIF ; ;AN000;
$$IF3:
; $ENDIF ; ;AN000;
$$IF2:
; $ENDIF ; ;AN000;
$$IF1:
exitpgm: mov al,ExitStatus ;Get Errorlevel ;AN000;
DOS_Call Exit ;Exit program ;AN000;
int 20h ;If other exit fails ;AN000;
Main_Init endp ; ;AN000;
;*****************************************************************************
;Routine name: get_psp
;*****************************************************************************
;Description: get info from the psp area
;
;Called Procedures: get_drive
;
;Change History: Created 8/7/87 bgb
;
;Input: none
;
;Output: psp_segment
; command_line_buffer
;
;Psuedocode
;----------
; get addr of psp
; move command line into data seg
; get drive number of target
; get addr of data seg
; call get_drive
; ret
;*****************************************************************************
Procedure get_psp ;;AN000;
DOS_Call GetCurrentPSP ;Get PSP segment address :AN000;bgb
mov PSP_Segment,bx ;Save it for later ;AN000;bgb
; get command line from psp ;AN000;bgb
mov cx,PSP_Segment ;point ds to data seg ;AN000;bgb
mov ds,cx ; " " " " " ;AN000;bgb
assume ds:NOTHING,es:dg ; " " " " " ;AN000;bgb
mov si,Command_Line_Parms ;ds:si --> old area in psp ;AN000;bgb
LEA di,command_line_buffer ; es:di -> new area in data
mov cx,128 ; do for 128 bytes
rep movsb ; mov 1 byte until cx=0
; get the drive number of the target from the psp (0=default, a=1, b=2, c=3) ;AN000;bgb
mov bl,ds:[FCB1] ;Get target drive from FCB -74 ;AN000;
Set_Data_Segment ;Set DS,ES to Data segment ;AN000;bgb
call get_drive
ret
get_psp endp ; ;AN000;
;*****************************************************************************
;Routine name: get_drive
;*****************************************************************************
;Description: get drive letter from reg bl
;
;Change History: Created 8/7/87 bgb
;
;Input: bl = drive num (default=0)
;
;Output: driveletter
; drive_letter_msg
; user_drive
;
;Psuedocode
;----------
; IF drive-num = default
; get default drive number (a=1)
; convert to letter
; ELSE
; convert to letter
; ENDIF
; move letter into data areas
; ret
;*****************************************************************************
Procedure get_drive ;;AN000;
; convert drive number to drive letter
cmp bl,0 ;a=1 b=2 c=3 ;Is it default drive? 0=default ;AN000;
; $IF E ;Yes, turn it into drive letter ;AN000;
JNE $$IF7
; get default drive number
DOS_Call Get_Default_Drive ;Get default drive num in al ;AN000;
;a=0, b=1, c=2
mov drive,al ; ;AN000;bgb
; $ELSE ;Not default, A=1 ;AN000;
JMP SHORT $$EN7
$$IF7:
; bl already contains the correct drive number - save it
dec bl ;a=0 b=1 c=2
mov drive,bl ; ;AN000;bgb
mov al,bl
; $ENDIF ; 74+40=b4
$$EN7:
add al,"A" ;convert it to letter ;AN000;
mov driveletter,al ;set up prompt msg ;AN000;bgb
mov Drive_Letter_Msg,al ;Save it in message ;AN000;
mov User_Drive,al ;Put it into path strings ; ;
ret
get_drive endp ; ;AN000;
;*****************************************************************************
;Routine name: Init_Io
;*****************************************************************************
;description: Initialize messages, Parse command line if FAT file system
;
;Called Procedures: Preload_Messages
; Parse_Recover
;
;Change History: Created 5/10/87 MT
;
;Input: PSP command line at 81h and length at 80h
;
;Output: FS_Not_FAT = YES/NO
; Drive_Letter_Msg set up for any future messages that need it
;
;Psuedocode
;----------
; Load messages (CALL Preload_Messages)
; IF no fatal error
; Get file system type (12-bit fat, 16-bit fat, big fat, ifs)
; IF old-type-diskette, or
; dos4.00 12-bit fat, or
; dos4.00 16-bit fat, then
; Go handle FAT based Recover syntax's (Call Parse_Recover)
; ELSE
; FS_Not_FAT = YES
; ENDIF
; ENDIF
; ret
;*****************************************************************************
Procedure Init_IO ;;AN000;
; load the error messages from the system ;an022;bgb
call Preload_Messages ;Load up message retriever ;AN000;
ifdef fsexec ;an022;bgb
mov FS_Not_FAT,No ;an022;bgb
cmp Fatal_Error,YES ;Quit? ;AN000; ;an022;bgb
; $IF NE ;Nope, keep going ;AN000; ;an022;bgb
JE $$IF10
; get file system type from ioctl ;an022;bgb
mov al,generic_ioctl ;al=0d (get media id) ;AN000;;an030;bgb
xor bx,bx ;use default drive ;AN009;b;an022;bgbgb
mov ch,Rawio ;8 = disk io ;an030;bgb;an022;bgb
mov cl,Get_Media_Id ;66h ;an030;bgb
lea dx,Media_ID_Buffer ;Point at buffer ;AN000; ;an022;bgb
DOS_Call IOCtl ;Do function call ah=44 ;AN000; ;an022;bgb
; is it DOS 3.3 or below? ;carry flag means old dos ;an022;bgb
; $IF C,OR ;Old style diskette, OR ;AN000; ;an022;bgb
JC $$LL11
; is it a new-12 bit fat? ;an022;bgb
lea si,FAT12_String ;Check for FAT_12 string ;AN000; ;an022;bgb
lea di,Media_ID_Buffer.Media_ID_File_System ; ;AN0;an022;bgb00;
mov cx,Len_FS_ID_String ;Length of compare ;AN00;an022;bgb0;
repe cmpsb ;Find it? ;AN00;an022;bgb0;
; $IF E,OR ;Nope, keep going ;AN000; ;an022;bgb
JE $$LL11
; is it a new 16-bit fat? ;an022;bgb
lea si,FAT16_String ;Check for FAT_16 string ;AN000; ;an022;bgb
lea di,Media_ID_Buffer.Media_ID_File_System ; ;AN0;an022;bgb00;
mov cx,Len_FS_ID_String ;Length of compare ;AN00;an022;bgb0;
repe cmpsb ;Do compare ;AN00;an022;bgb0;
; $IF E ; is it new 16-bit fat? ;AN000; ;an022;bgb
JNE $$IF11
$$LL11:
endif ;an022;bgb
; file system is fat based, continue (old or new) ;an022;bgb
call Parse_Recover ;Yes, go sort out syntax ;an022;bgb
; ;an022;bgb
; non-fat based system ;an022;bgb
ifdef fsexec ;an022;bgb
; $ELSE ;We got FS other than FAT ;AN000; ;an022;bgb
JMP SHORT $$EN11
$$IF11:
mov FS_Not_FAT,Yes ;Indicate exec file system ;AN000; ;an022;bgb
mov cx,8 ;an022;bgb;an011;bgb
lea si,Media_ID_Buffer.Media_ID_File_System ;get file system;an022;bgb ;an011;bgb
lea di,fs_string_buffer ;put it here ;an022;bgb;an011;bgb
rep movsb ;an022;bgb;an011;bgb
lea di,fs_string_buffer ;point to beginning again ;an022;bgb;an011;bgb
; $DO COMPLEX ;search th string until eol found ;an022;bgb;an011;bgb
JMP SHORT $$SD13
$$DO13:
inc di ;next char ;an022;bgb;an011;bgb
; $STRTDO ;start loop here ;an022;bgb;an011;bgb
$$SD13:
cmp byte ptr [di],' ' ;end of string ? ;an022;bgb ;an011;bgb
; $ENDDO E ;end loop when eol found ;an022;bgb;an011;bgb
JNE $$DO13
lea si,fs_string_end ;get end of string - rec.exe ;an022;bgb;an011;bgb
mov cx,8 ; 8 more chars ;an022;bgb;an011;bgb
rep movsb ;move it in ;an022;bgb;an011;bgb
; $ENDIF ; fat based file system ;AN000; ;an022;bgb
$$EN11:
; $ENDIF ; no error from msg retreiver ;AN00;an022;bgb0;
$$IF10:
endif ;an022;bgb
ret ; ;AN000;
Init_Io endp ; ;AN000;
;*****************************************************************************
;Routine name: Preload_Messages
;*****************************************************************************
;Description: Preload messages using common message retriever routines.
;
;Called Procedures: SysLoadMsg
;
;Change History: Created 5/1/87 MT
;
;Input: Fatal_Error = NO
;
;Output: Fatal_Error = YES/NO
;
;Psuedocode
;----------
; Preload All messages (Call SysLoadMsg)
; IF error
; Display SysLoadMsg error message
; Fatal_Error = YES
; ENDIF
; ret
;*****************************************************************************
Procedure Preload_Messages ;;AN000; ;
call SysLoadMsg ;Preload the messages ;AN000;
; $IF C ;Error? ;AN000;
JNC $$IF18
call SysDispMsg ;Display preload msg ;AN000;
mov Fatal_Error, YES ;Indicate error exit ;AN000;
; $ENDIF ; ;AN000;
$$IF18:
ret ; ;AN000;
Preload_Messages endp ; ;AN000;
;*****************************************************************************
;Routine name: Parse_Command_Line
;*****************************************************************************
;Description: Parse the command line. Check for errors, and display error and
; exit program if found. Use parse error messages except in case
; of no parameters, which has its own message
;
;Called Procedures: Message (macro)
; SysParse
; parse_good
; parse_err
;
;Change History: Created 5/1/87 MT
;
;Input: Fatal_Error = NO
;
;Output: Fatal_Error = YES/NO
; PARSE-ADDR
; DRIVELETTER
; PARSE-ADDR
;
;Psuedocode
;----------
; set up regs to call sysparse
;DO UNTIL error=yes or return(ax)=finish(-1)
; call sysparse
; IF ax=good return(0)
; call parse-good
; ELSE
; call parse-err
; ENDIF
;ENDLOOP
;ret
;
;A. normal proc == 1- ax=good 0
; 2- ax=done -1
;B. no parm == 1- ax=error 2
;
;C. too many == 1- ax=good 0
; 2- ax=error 1
;D. syntax == 1- ax=error 9
;*****************************************************************************
Procedure Parse_recover ; ;AN000;bgb
push ds ; save ds ;AN000;bgb
; set up to call sysparse ;AN000;bgb
set_data_segment ;ds,es point to data seg
LEA si,command_line_buffer ;ds:si -> cmd line
LEA di,parms_input_block ;es:di--> parms input block ;AN000;bgb
xor cx,cx ;cx = 0 ;AN000;bgb
xor dx,dx ;dx = 0 ;AN000;bgb
mov done,no
; call sysparse until error or end of cmd line ;AN000;bgb
; $DO ;AN000;bgb
$$DO20:
call SysParse ;go parse ;AN000;bgb
cmp ax,$p_rc_eol ; -1 end of command line? ;AN000;bgb
; $LEAVE E ; yes - done ;AN000;bgb
JE $$EN20
cmp ax,$p_no_error ; good return code ??? (0) ;AN000;bgb
; $IF E ; yes ;AN000;bgb
JNE $$IF22
call parse_good ; go get it ;AN000;bgb
; $ELSE ; ax not= good ;AN000;bgb
JMP SHORT $$EN22
$$IF22:
call parse_err ; check for error ;AN000;bgb
; $ENDIF ; eol ;AN000;bgb
$$EN22:
cmp Fatal_Error,YES ;Can we continue? ;AN000;bgb
; $LEAVE E ;NO ;AN000;bgb
JE $$EN20
; $ENDDO ; ;AN000;bgb
JMP SHORT $$DO20
$$EN20:
pop ds ; ;AN000;bgb
ret ; ;AN000;bgb
; ;AN000;bgb
Parse_recover endp ; ;AN000;bgb
; ;AN000;bgb
;AN000;bgb
;*****************************************************************************
;Routine name: parse_good
;*****************************************************************************
;
;Description: when the ax register returned by sysparse indicates and error,
; this procedure is called. it then determines which error
; occurred, and calls parse_message to display the msg.
;
;Called Procedures: parse_message (macro)
;
;Change History: Created 7/23/87 bgb
;
;Input:
;
;Output: Fatal_Error = YES/NO
;
;Psuedocode
;----------
;
; found=yes
; IF data=drive
; save drive number and letter
; ELSE
; IF data=filespec
; save filespec
; ELSE
; call parse-msg
; ENDIF
; ENDIF
;*****************************************************************************
;
Procedure Parse_good ; ;AN000;bgb
cmp parse_type,$p_drive ; 6 if data=drive ;AN000;bgb
; $IF E ; not eol, good syntax, drive entered ;AN000;bgb
JNE $$IF27
mov bl,byte ptr parse_addr ;AN000;bgb
dec bl ;Make drive 0 based ;AN000;bgb
mov drive,bl ;AN000;bgb
add bl,'A' ;make it character ;AN000;bgb
mov driveletter,bl ;save into drive letter ;AN000;bgb
; $ELSE ; no - filespec entered ;AN000;bgb
JMP SHORT $$EN27
$$IF27:
cmp parse_type,$p_file_spec ; 5 if data = filespec ;AN000;bgb
; $IF E ; was file spec entered ;AN000;bgb
JNE $$IF29
; push si ; save input offset reg ;AN000;bgb
; push ds ; save input seg reg ;AN000;bgb
; push cx ; save count ;AN000;bgb
; push es ; save other seg reg ;AN000;bgb
; mov cx,ds ;es points to data ;AN000;bgb
; mov es,cx ;es points to data ;AN000;bgb
; mov si,word ptr parse_addr ;get offset to filespec ;AN000;bgb
; mov ds,word ptr parse_addr+2 ;get segment to filespec ;AN000;bgb
; mov cx,128 ; mov 128 bytes ;AN000;bgb
; rep movs es:fname_buffer,ds:[si] ;move it ;AN000;bgb
; pop es ; save other seg reg ;AN000;bgb
; pop cx ; save other seg reg ;AN000;bgb
; pop ds ; save other seg reg ;AN000;bgb
; pop si ; save other seg reg ;AN000;bgb
; $ELSE ; no, no drive or filespec ;AN000;bgb
JMP SHORT $$EN29
$$IF29:
mov ax,$p_syntax ;tell user bad syntax ;AN000;bgb
parse_message ;display msg ;AN000;bgb
mov Fatal_Error,YES ;Indicate death! ;AN000;bgb
; $ENDIF ; was drive entered ? ;AN000;bgb
$$EN29:
; $ENDIF ;if data=drive ;AN000;bgb
$$EN27:
ret ; ;aN000;bgb
;AN000;bgb
parse_good endp ; ;AN000;bgb
;AN000;bgb
;*****************************************************************************
;Routine name: parse_err
;*****************************************************************************
;
;Description: when the ax register returned by sysparse indicates and error,
; this procedure is called. it then determines which error
; occurred, and calls parse_message to display the msg.
;
;Called Procedures: parse_message (macro)
;
;Change History: Created 7/23/87 bgb
;
;Input:
;
;Output: Fatal_Error = YES/NO
;
;Psuedocode
;----------
;
; IF ax=done (end of cmd line?) -1
; IF found=no (eol, but no parameters listed)
; call parse-msg
; ENDIF
; ELSE (error other than eol)
; call parse-msg
; ENDIF
;*****************************************************************************
;
Procedure Parse_err ; ;AN000;bgb
mov Fatal_Error,YES ;Indicate death! ;AN000;bgb ;AN000;bgb
cmp ax,$P_Op_Missing ; 2 = no parameters ? ;AN000;bgb
; $IF E ; ;AN000;bgb
JNE $$IF33
message baddrv ; yes (invalid drive or filename) ;AN000;bgb
; $ELSE ;AN000;bgb
JMP SHORT $$EN33
$$IF33:
mov byte ptr [si],00 ;zero terminate display string ;an031;bgb
dec si ;look at previous char ;an031;bgb
nextsi:
public nextsi
dec si ;look at previous char ;an031;bgb
cmp byte ptr [si],' ' ;find parm separator ;an031;bgb
jnz nextsi ;loop until begin of parm found
mov movsi,si ;mov si into display parms ;an031;bgb
parse_message ;no- display parse message ;AN000;bgb ;AN000;bgb
; $ENDIF ;AN000;bgb
$$EN33:
ret ; ;AN000;bgb
parse_err endp ; ;AN000;bgb
;*****************************************************************************
;Routine name: Validate_Target_Drive
;*****************************************************************************
;
;Description: Control routine for validating the specified format target drive.
; If any of the called routines find an error, they will print
; message and terminate program, without returning to this routine
;
;Called Procedures: Check_Target_Drive
; Check_For_Network
; Check_Translate_Drive
;
;Change History: Created 5/1/87 MT
;
;Input: Fatal_Error = NO
;
;Output: Fatal_Error = YES/NO
;
;Psuedocode
;----------
;
; CALL Check_Target_Drive
; IF !Fatal_Error
; CALL Check_For_Network
; IF !Fatal_Error
; CALL Check_Translate_Drive
; ENDIF
; ENDIF
; ret
;*****************************************************************************
;
Procedure Validate_Target_Drive ; ;AN000;
call Check_For_Network ;See if Network drive letter ;AN000;
cmp Fatal_Error,YES ;Can we continue? ;AN000;
; $IF NE ;Yep ;AN000;
JE $$IF36
call Check_Translate_Drive ;See if Subst, Assigned ;AN000;
call Check_Target_Drive ;See if valid drive letter ;AN000;
; $ENDIF ;- Fatal_Error passed back ;AN000;
$$IF36:
ret ; ;AN000;
Validate_Target_Drive endp ; ;AN000;
;*****************************************************************************
;Routine name: Check_Target_Drive
;*****************************************************************************
;
;Description: Check to see if valid DOS drive by checking if drive is
; removable. If error, the drive is invalid. Save default
; drive info. Also get target drive BPB information, and compute
; the start of the data area
;
;Called Procedures: Message (macro)
;
;Change History: Created 5/1/87 MT
;
;Input: Fatal_Error = NO
;
;Output: Fatal_Error = YES/NO
; User_Drive = default drive
;
;Psuedocode
;----------
;
; Get default drive
; See if drive LOCAL (INT 21h, AX=4409h IOCtl)
; IF error - drive invalid
; Display Invalid drive message
; Fatal_Error= YES
; ENDIF
; Get BPB of target drive (Generic IOCtl Get Device parameters)
; Compute start of data area
; ret
;*****************************************************************************
;
Procedure Check_Target_Drive ; ;AN000;
mov al,0Dh ;Get BPB information ;AN000;
mov cx,0860h ; " " " " ;AN000;
;;;;;;;;mov bl,byte ptr parse_addr ; " " " " ;AN000;
mov bl,drive ;drive number ;A=0,B=1 ;AN000;bgb
inc bl ;a=1 ;AN000;bgb
lea dx,BPB_Buffer ; " " " " ;AN000;
DOS_Call IOCtl ; " " " " ;AN000;
xor cx,cx ;Find # sectors used by FAT's ;AN000;
mov cl,BPB_Buffer.NumberOfFATs ; " " " " ;AN000;
mov ax,BPB_Buffer.SectorsPerFAT ; " " " " ;AN000;
mul cx ; " " " " ;AN000;
push dx ;Save results ;AN000;
push ax ; " " ;AN000;
mov ax,BPB_Buffer.RootEntries ;Find number of sectors in root ;AN000;
mov cl,Dir_Entries_Per_Sector ; by dividing RootEntries ;AN000;
div cl ; by (512/32) ;AN000;
pop bx ;Get low sectors per FAT back ;AN000;
pop dx ;Get high part ;AN000;
add ax,bx ;Add to get FAT+Dir sectors ;AN000;
adc dx,bp ;zero ;High part ;AN000;
add ax,ReservedSectors ;Add in Boot record sectors ;AN000;
adc dx,bp ;zero ;to get start of data (DX:AX) ;AN000;
mov Data_Start_Low,ax ;Save it ;AN000;
mov Data_Start_High,dx ; ;AN000;
ret ;And we're outa here ;AN000;
Check_Target_Drive endp ; ;AN000;
;*****************************************************************************
;Routine name: Check_For_Network
;*****************************************************************************
;
;Description: See if target drive isn't local, or if it is a shared drive. If
; so, exit with error message. The IOCtl call is not checked for
; an error because it is called previously in another routine, and
; invalid drive is the only error it can generate. That condition
; would not get this far
;
;Called Procedures: Message (macro)
;
;Change History: Created 5/1/87 MT
;
;Input: Drive
; Fatal_Error = NO
;
;Output: Fatal_Error = YES/NO
;
;Psuedocode
;----------
; See if drive is local (INT 21h, AX=4409 IOCtl)
; IF not local
; Display network message
; Fatal_ERROR = YES
; ELSE
; IF 8000h bit set on return
; Display assign message
; Fatal_Error = YES
; ENDIF
; ENDIF
; ret
;*****************************************************************************
;
Procedure Check_For_Network ; ;AN000;
; is device local? int 21, ah=44, al=9
mov bl,drive ;drive number ;A=0,B=1 ;AN000;bgb
inc bl ;drive number ;A=1,B=2 for IOCtl call;AN000;bgb
mov al,09h ;See if drive is local ;AC000;bgb
DOS_Call IOCtl ;-this will fail if bad drive ;AC000;
; $IF C ;CarrY means invalid drive ;AC000;
JNC $$IF38
Message BadDrv ;Print message ;AC000;
mov Fatal_Error,Yes ;Indicate error ;AN000;
; $ELSE
JMP SHORT $$EN38
$$IF38:
test dx,Net_Check ;if (x & 1200H)(redir or shared); ;
; $IF NZ ;Found a net drive ;AC000;
JZ $$IF40
Message NotNetM ;Tell 'em ;AC000;
mov Fatal_Error,Yes ;Indicate bad stuff ;AN000;
; $ELSE ;Local drive, now check assign ;AN000;
JMP SHORT $$EN40
$$IF40:
test dx,Assign_Check ;8000h bit is bad news ; ;
; $IF NZ ;Found it ;AC000;
JZ $$IF42
Message SubstErr ;Tell error ;AC000;
mov Fatal_Error,Yes ;Indicate bad stuff ;AN000;
; $ENDIF ; ;AN000;
$$IF42:
; $ENDIF ; ;AN000;
$$EN40:
; $ENDIF ; ;AN000;
$$EN38:
ret ; ;AN000;
Check_For_Network endp ; ;AN000;
;*****************************************************************************
;Routine name: Check_Translate_Drive
;*****************************************************************************
;
;Description: Do a name translate call on the drive letter to see if it is
; assigned by SUBST or ASSIGN
;
;Called Procedures: Message (macro)
;
;Change History: Created 5/1/87 MT
;
;Input: Drive_Letter_Msg has drive string
; Fatal_Error = NO
;
;Output: Fatal_Error = YES/NO
;
;Psuedocode
;----------
; Put drive letter in ASCIIZ string "d:\",0
; Do name translate call (INT 21)
; IF drive not same
; Display assigned message
; Fatal_Error = YES
; ENDIF
; ret
;*****************************************************************************
;
Procedure Check_Translate_Drive ; ;AN000;
mov al,Drive_Letter_Msg ;Get target drive letter into ;AN000;
mov TranSrc,al ; "d:\",0 string ;AN000;
lea si,TranSrc ;Point to translate string ;AN000;
push ds ;Set ES=DS (Data segment) ; ;
pop es ; " " " " ; ;
lea di,FatTbl ;Point at output buffer ; ;
DOS_Call xNameTrans ;Get real path ;AC000;
; $IF NC ;an017;bgb
JC $$IF46
mov bl,byte ptr [TranSrc] ;Get drive letter from path ; ;
cmp bl,byte ptr [Fattbl] ;Did drive letter change? ; ;
; $IF NE ;If not the same, it be bad ;AC000;
JE $$IF47
Message SubstErr ;Tell user ;AC000;
mov Fatal_Error,Yes ;Setup error flag ;AN000;
; $ENDIF ; ;AN000;
$$IF47:
; $ELSE ;an017;bgb
JMP SHORT $$EN46
$$IF46:
mov Fatal_Error,Yes ;Setup error flag ;AN000; ;an017;bgb
mov bx,1 ;an017;bgb
mov cx,bp ;zero ;an017;bgb
mov dx,0100h ;an017;bgb
call sysdispmsg ;an017;bgb
; $ENDIF ; ;AN000; ;an017;bgb
$$EN46:
ret ; ;AN000;
Check_Translate_Drive endp ; ;AN000;
;*****************************************************************************
;Routine name: Hook_Interrupts
;*****************************************************************************
;
;Description: Change the interrupt handler for INT 13h to point to the
; ControlC_Handler routine
;
;Called Procedures: None
;
;Change History: Created 4/21/87 MT
;
;Input: None
;
;Output: None
;
;Psuedocode
;----------
;
; Point at ControlC_Handler routine
; Set interrupt handler (INT 21h, AX=2523h)
; ret
;*****************************************************************************
;
Procedure Hook_Interrupts ; ;AN000;
mov al,23h
DOS_Call Get_Interrupt_Vector ;Get the INT 23h handler ;AC000;
mov word ptr INT_23_Old_Off,bx ;
mov bx,es ; ;AN000;
mov word ptr INT_23_Old_Seg,bx ; ;AN000;
mov al,23h ;Specify CNTRL handler ; ;
lea dx, INT_23 ;Point at it ; ;
push ds ;Save data seg ; ;
push cs ;Point to code segment ; ;
pop ds ; ; ;
DOS_Call Set_Interrupt_Vector ;Set the INT 23h handler ;AC000;
pop ds ;Get Data degment back ; ;
mov al,24h ;
DOS_Call Get_Interrupt_Vector ;Get the INT 24h handler ;AC000;
mov word ptr INT_24_Old_Off,bx ;Save it
mov bx,es ; ;AN000;
mov word ptr INT_24_Old_Seg,bx ;
mov al,24h ;Specify handler ; ;
lea dx, INT_24 ;Point at it ; ;
push ds ;Save data seg ; ;
push cs ;Point to code segment ; ;
pop ds ; ; ;
DOS_Call Set_Interrupt_Vector ;Set the INT 23h handler ;AC000;
pop ds ;Get Data degment back ; ;
ret ; ;AN000;
Hook_Interrupts endp ; ;AN000;
;*****************************************************************************
;Routine name: Hook_CNTRL_C
;*****************************************************************************
;
;Description: Change the interrupt handler for INT 13h to point to the
; ControlC_Handler routine
;
;Called Procedures: None
;
;Change History: Created 4/21/87 MT
;
;Input: None
;
;Output: None
;
;Psuedocode
;----------
;
; Point at ControlC_Handler routine
; Set interrupt handler (INT 21h, AX=2523h)
; ret
;*****************************************************************************
;
;rocedure Hook_CNTRL_C ; ;AN000;
; mov al,23H ;Specify CNTRL handler ; ;
; mov dx, offset ControlC_Handler ;Point at it ; ;
; push ds ;Save data seg ; ;
; push cs ;Point to code segment ; ;
; pop ds ; ; ;
; DOS_Call Set_Interrupt_Vector ;Set the INT 23h handler ;AC000;
; pop ds ;Get Data degment back ; ;
; ret ; ;AN000;
;ook_CNTRL_C endp ; ;AN000;
;
;ontrolC_Handler:
; set_data_segment
;;;;;;; Message msgInterrupt ; ;AC000;
;;;;;;;;mov ExitStatus, ExitCtrlC
; jmp ExitPgm
;*****************************************************************************
;Routine name: Clear_Append_X
;*****************************************************************************
;
;Description: Determine if Append /XA is turned on thru INT 2Fh, and shut
; off for life of RECOVER if it is.
;
;Called Procedures: None
;
;
;Change History: Created 5/13/87 MT
;
;Input: None
;
;Output: APPEND = YES/NO
;
;Psuedocode
;----------
;
; Append = NO
; See if APPEND /X is present (INT 2Fh, AX=0B706h)
; IF present
; Turn append /X off (INT 2Fh, AX=B707h, BX = 0)
; Append = YES
; ENDIF
; ret
;*****************************************************************************
;
Procedure Clear_Append_X ; ;AN000;
mov Append,NO ;Init the Append /X flag ;AN000;
mov ax,Append_X ;Is Append /X there? ;AN000;
int Multiplex ; " " " " ;AN000;
cmp bx,Append_X_Set ;Was it turned on? ;AN000;
; $IF E ;Yep ;AN000;
JNE $$IF51
mov Append,YES ;Indicate that it was on ;AN000;
mov ax,Set_Append_X ;Turn Append /X off ;AN000;
xor bx,bx ;Append_Off ; " " " " ;AN000;
int Multiplex ; " " " " ;AN000;
; $ENDIF ; ;AN000;
$$IF51:
ret ; ;AN000;
Clear_Append_X endp ; ;AN000;
;*****************************************************************************
;Routine name: RECOVER_IFS
;*****************************************************************************
;
;description:
;
;Called Procedures: Main_Routine
; EXEC_FS_RECOVER
;
;Change History: Created 5/8/87 MT
;
;Input: FS_Not_FAT = Yes/No
;
;Output: None
;
;Psuedocode
;----------
;
; IF File system other than FAT
; Go call file system specific RECOVER (CALL EXEC_FS_RECOVER)
; ELSE
; Do FAT based RECOVER (CALL Main_Routine)
; ENDIF
; ret
;*****************************************************************************
;
Procedure RECOVER_IFS ; ;AN000;
ifdef fsexec ;an022;bgb
; cmp FS_Not_Fat,YES ;Is the target FS a FAT? ;AN000; ;an022;bgb
; $IF E ;No, so need to exec the ;AN000; ;an022;bgb
; call EXEC_FS_RECOVER ; file system specific prog. ;AN000; ;an022;bgb
; $ELSE ;It's a FAT ;AN000; ;an022;bgb
endif ;an022;bgb
call clear_append_x ;BGB
call Main_Routine ;Use canned code! ;AN000;
call reset_append_x ;BGB
ifdef fsexec ;an022;bgb
; $ENDIF ; ;AN000; ;an022;bgb
endif ;an022;bgb
ret ; ;AN000;
RECOVER_IFS endp ; ;AN000;
;*****************************************************************************
;Routine name: Reset_Append_X
;*****************************************************************************
;
;description: If APPEND /XA was on originally, turn it back on
;
;Called Procedures: None
;
;
;Change History: Created 5/13/87 MT
;
;Input: None
;
;Output: APPEND = YES/NO
;
;Psuedocode
;----------
;
; IF APPEND = YES
; Turn append /X on (INT 2Fh, AX=B707h, BX = 1)
; ENDIF
; ret
;*****************************************************************************
;
Procedure Reset_Append_X ; ;AN000;
cmp Append,Yes ;Was Append /X on to start with?;AN000;
; $IF E ;Yep ;AN000;
JNE $$IF53
mov ax,Set_Append_X ;Turn Append /X off ;AN000;
mov bx,Append_On ; " " " " ;AN000;
int Multiplex ; " " " " ;AN000;
; $ENDIF ; ;AN000;
$$IF53:
ret ; ;AN000;
Reset_Append_X endp ; ;AN000;
pathlabl recinit
code ends
end main_init ;AC000;bgb
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