PR#3
PREFIX /A2OSX.BUILD
NEW
INC 1
AUTO 6
				.LIST OFF	
*--------------------------------------
* Remove extra SPACE & comment
*--------------------------------------
Cmd.Normalize	>LDYA pData
				>STYA ZPPtr1
				
				lda (pData)				empty line...quit
				beq .9

				tax						Char count
				
				ldy #0
								
.1				jsr Cmd.Normalize.Next
				beq .8					no more char, exit
				
				cmp #' '				skip leading spaces
				beq .1
				
				cmp #'#'				Comment ?
				beq .8					ignore remaining chars
				
.3				iny						add char to buffer
				sta (pData),y
				
				jsr Cmd.Normalize.Next
				beq .8
				
				cmp #' '
				bne .3
				
				iny						add One SPACE to buffer
				sta (pData),y
				
.5				jsr Cmd.Normalize.Next
				beq .8
				cmp #' '
				beq .5					skip additional spaces
				bne .3					no more space, add next word...
				
.8				tya
				sta (pData)

.9				rts

Cmd.Normalize.Next
				txa
				beq .8
				dex
				inc ZPPtr1
				bne .1
				inc ZPPtr1+1
.1				lda (ZPPtr1)
.8				rts
*--------------------------------------
* Y,A -> Command line (formatted & not empty)
*--------------------------------------
Cmd.ExecYA		stz	bStartProc

Cmd.ExecYA.1	>SYSCALL ExpandStr.YA
				>STYA ZPPtr1
				>STYA ZPPtr2
				stx	Cmd.ExecYA.Exit.1+1

				ldy #0					CMD len
				
				lda (ZPPtr2)
				tax						ARGS len=Total Len
				
.1				inc ZPPtr2				Next Cmd Char
				bne .2
				inc ZPPtr2+1
				
.2				lda (ZPPtr2)
				cmp #" "				we reached blank between CMD ARGS
				beq .3
				
				iny						CMD+1
				dex						Total=0
				bne .1
				
.3				tya
				sta (ZPPtr1)			Cut CMD
				txa
				sta (ZPPtr2)			Cut ARGS
				
				>LDYA L.INTCMDS
				>STYA ZPPtr3
				
				ldx #0
				
.4				lda (ZPPtr3)
				beq Cmd.Exec.EXT		Ending 0, must be an external Cmd....
				
				cmp (ZPPtr1)			Same Len ?
				bne .8
				
				tay
				
.5				lda (ZPPtr1),y

				cmp #'a'				To Uppercase
				bcc .6
				cmp #'z'+1
				bcs .6
				eor #$20

.6				cmp (ZPPtr3),y
				bne .8
				dey
				bne .6
				
				jsr Cmd.Exec.INT		Found an internal Cmd...
				
				bcs .7
				
				lda #0
				
.7				ldy #S.PS.RC
				sta (pPS),y
				bra Cmd.ExecYA.Exit

.8				inx
				inx
				
				lda ZPPtr3
				sec
				adc (ZPPtr3)
				sta ZPPtr3
				bcc .4
				inc ZPPtr3+1
				bra .4
*--------------------------------------
Cmd.ExecYA.Exit	php
				pha
Cmd.ExecYA.Exit.1				
				lda #$ff
				>SYSCALL FreeMem.A
				pla
				plp
				rts
*--------------------------------------
Cmd.Exec.INT	jmp (J.INTCMDS,x)
*--------------------------------------
Cmd.Exec.EXT	ldy #1
				lda (ZPPtr1),y
				cmp #'/'				Command line is already full path, no search
				bne .10
				
				
				
				>LDYA L.ENV.PATH		push ENVNAME=PATH for search
				>SYSCALL GetEnvYA		get value for ENV=PATH
				bcs .1					No PATH, try in CD

				>PUSHYA					push search list
				
				>PUSHW ZPPtr1			push filename
				>PUSHWI UsrBuf256
				>PUSHW L.STAT
				>SYSCALL FileSearch
				bcc .2

.1				ldy #S.PS.hPREFIX		not found, try in CD
				lda (pPs),y
				>SYSCALL GetMemPtr.A
				>PUSHYA					push search list
				>PUSHW ZPPtr1
				>PUSHWI UsrBuf256
				>PUSHW L.STAT
				>SYSCALL FileSearch
				bcs .99

.2				phx 					save X=hMem, Y,A = Filename
				>PUSHYA
				
				>PUSHW L.CMD			replace CMD in TmpBuffer with full path
				>SYSCALL PStrCpy
				pla
				>SYSCALL FreeMem.A		Discard this string...
				
.3				stz UsrBuf256			reset UsrBuf256 for final CMDLINE

				>PUSHW L.STAT
				>PUSHW L.CMD
				>SYSCALL STAT
				bcs .99

				lda STAT+S.STAT.P.TYPE
				cmp #$04				TXT File ?
				beq Cmd.Exec.EXT.TXT
				cmp #$06				BIN File ?
				beq Cmd.Exec.EXT.BIN
				cmp #$ff				SYS File ?
				bne .9
				
				bra *
				
.9				lda #SYSMGR.ERRSYN
				sec	
.99				jmp Cmd.ExecYA.Exit
*--------------------------------------
* TXT : Launch "/PATH/SHELL /PATH/CMD ARGS"
*--------------------------------------
Cmd.Exec.EXT.TXT
				lda #0					Get arg[0] = /PATH/SHELL
				>SYSCALL GetArg.A
				>PUSHYA
				>PUSHWI UsrBuf256
				>SYSCALL PStrCpy
				
				inc UsrBuf256		Add a space....
				ldy UsrBuf256
				lda #' '
				sta UsrBuf256,y
*--------------------------------------
* BIN : Launch "/PATH/CMD ARGS"
*--------------------------------------
Cmd.Exec.EXT.BIN
				>PUSHW L.CMD
				>PUSHWI UsrBuf256
				>SYSCALL PStrCat
				
				lda ARGS
				beq .1
				
				inc UsrBuf256		Add a space....
				ldy UsrBuf256
				lda #' '
				sta UsrBuf256,y
				
				>PUSHW L.ARGS
				>PUSHWI UsrBuf256
				>SYSCALL PStrCat
			
.1				>LDYAI UsrBuf256
				bit bStartProc
				bmi .2					startproc
				
				>SYSCALL ExecProcessNewEnvYA
				jmp Cmd.ExecYA.Exit

.2				>SYSCALL CreateProcessYA
				jmp Cmd.ExecYA.Exit
*--------------------------------------
* Internal Commands
*--------------------------------------
Cmd.Exec.CD		lda ARGS
				bne Cmd.Exec.CD1
				
Cmd.Exec.PWD	ldy #S.PS.hPREFIX
				lda (pPs),y
				>SYSCALL GetMemPtr.A
				>PUSHYA
				>LDYA L.MSG.PSTRCR
				>SYSCALL PrintF.YA
				rts
				
Cmd.Exec.CD1	stz UsrBuf256
				lda ARGS+1
				cmp #'/'				Full Path?
				beq .1
				
				ldy #S.PS.hPREFIX		no, init target prefix with actual prefix
				lda (pPs),y
				>SYSCALL GetMemPtr.A
				>PUSHYA
				>PUSHWI UsrBuf256
				>SYSCALL PStrCpy
				
.1				>PUSHW L.ARGS			Append ARG to buffer
				>PUSHWI UsrBuf256
				>SYSCALL PStrCat
				
				lda #'/'
				ldx UsrBuf256
				cmp UsrBuf256,x			Ending '/' ?
				beq .2
				
				sta UsrBuf256+1,x		no, add one...
				inc UsrBuf256
				
.2				ldx #0					path is something like : /dir1/../dir2/

.3				ldy #0					reset char counter
				
.4				cpx UsrBuf256
				beq .8
				
				inx
				lda UsrBuf256,x
				cmp #'/'
				beq .5
				iny						char=char+1!!!
				bra .4
				
.5				tya						any char count?
				beq .4					no, start counting...
				
				cpy #2					do we have /xx/?
				bne .3					no, skip this token

				lda #'.'
				cmp UsrBuf256-1,x		/yy/x./  ?
				bne .3
				cmp UsrBuf256-2,x		/yy/../  ?
				bne .3
				cpx #4					/../   ?
				beq Cmd.Exec.ERRSYN		illegal
				
				txa
				tay						save end of /../
				sec
				sbc #3					remove ../
				tax 
				
.6				dex
				lda UsrBuf256,x			Found beginning of dir before /../
				cmp #'/'
				bne .6
				
.7				lda UsrBuf256,y			strip dir/../		
				sta UsrBuf256,x
				cpy UsrBuf256
				beq .71
				iny
				inx
				bra .7	
	
.71				stx UsrBuf256
				
				bra .2					Start over...
				
.8				cpx #1					
				beq .80 				we have '/' go change prefix
				
				>PUSHW L.STAT
				>PUSHWI UsrBuf256
				>SYSCALL STAT
				bcs .9

				lda STAT+S.STAT.P.TYPE
				cmp #$0F				Directory ?
				bne Cmd.Exec.ERRSYN
				
.80				>LDYAI UsrBuf256
				>SYSCALL NewPStrYA
				bcs .9
				phx
				
				ldy #S.PS.hPREFIX
				lda (pPs),y
				>SYSCALL FreeMem.A
				
				pla
				
				ldy #S.PS.hPREFIX
				sta (pPs),y
				jsr SetPWD
				clc
.9				rts
*--------------------------------------
Cmd.Exec.ERRSYN	lda #SYSMGR.ERRSYN
				sec
				rts
*--------------------------------------
Cmd.Exec.STARTPROC
				lda ARGS
				beq Cmd.Exec.ERRSYN
				sec
				ror	bStartProc

				>LDYA L.ARGS
				jmp Cmd.ExecYA.1
*--------------------------------------
Cmd.Exec.SET	lda ARGS
				bne Cmd.Exec.SETVAR
				
				ldy #S.PS.hENV
				lda (pPs),y
				>SYSCALL GetMemPtr.A
				>STYA ZPPTR1
				
* No arg, print all ENV
		
.1				lda (ZPPTR1)
				beq .8					Ending 0 ?

				lda ZPPTR1				get next for value
				sec
				adc (ZPPTR1)			Add len+1 to PTR
				sta ZPPTR2
				lda ZPPTR1+1
				adc #0
				sta ZPPTR2+1
				
				lda (ZPPTR2)			just in case...
				beq .8	
				
				>PUSHW ZPPTR2			Push value
				>PUSHW ZPPTR1			Push name

				>LDYA L.MSG.PRINTENV
				>SYSCALL PrintF.YA
				bcs .9

				lda ZPPTR2
				sec
				adc (ZPPTR2)			Add len+1 to PTR
				sta ZPPTR1
				lda ZPPTR2+1
				adc #0
				sta ZPPTR1+1
				bra .1
				
.8				clc
.9				rts				
				
Cmd.Exec.SETVAR	tax
				lda ARGS,x
				cmp #'='				ARGS ends with =, UnsetEnv
				beq .2
				
.1				dex
				beq .3					no =, GetEnv
				
				lda ARGS,x
				cmp #'='				ARGS contains =, PutEnv
				bne .1
				
				cpx #1					string is '=value' ?
				beq .99					syntax error
				
				>LDYA L.ARGS			String is VAR=VALUE...	
				>SYSCALL PutEnvYA
				rts
				
.2				dec ARGS				String is "VAR=", Remove endig '='
				>LDYA L.ARGS			String is "VAR"...	
				>SYSCALL UnsetEnvYA
				rts

* Print requested VAR
				
.3				>LDYA L.ARGS
				>SYSCALL GetEnvYA
				bcs .8
				
				>PUSHYA					push value
				>PUSHW L.ARGS			push name
				>LDYA L.MSG.PRINTENV
				>SYSCALL PrintF.YA
				
.8				clc
.9				rts

.99				jmp Cmd.Exec.ERRSYN
*--------------------------------------
Cmd.Exec.DATE	sec
				.HS 90					bcc

Cmd.Exec.TIME	clc
				php
				>LDYA L.TIME
				>SYSCALL TimeYA

				>PUSHWI UsrBuf256
				plp
				bcc .1
				>PUSHW L.FMT.DATE
				bra .2
.1				>PUSHW L.FMT.TIME

.2				>PUSHW L.TIME
				>SYSCALL StrFTime
				
				>LDYAI UsrBuf256
				>SYSCALL PrintF.YA
				bcs Cmd.Exec.ECHO.RTS
				bra Cmd.Exec.ECHO.CR
*--------------------------------------
Cmd.Exec.ECHO	lda ARGS
				beq Cmd.Exec.ECHO.CR
				
				>PUSHW L.ARGS
				>LDYA L.MSG.PSTRCR
				>SYSCALL PrintF.YA
				rts
				
Cmd.Exec.ECHO.CR
				lda #13
				>SYSCALL PutChar.A
				bcs Cmd.Exec.ECHO.RTS
				
				lda #10
				>SYSCALL PutChar.A

Cmd.Exec.ECHO.RTS
				rts
*--------------------------------------
Cmd.Exec.READ	lda ARGS
				beq .9 

				lda #0
				ldy #bSecureRead
				sta (pData),y

				lda pData
				clc
				adc #VarBuffer
				sta ZPPTR1
				lda pData+1
				adc #0
				sta ZPPTR1+1
				
				ldx #0
				
.1				cpx ARGS
				beq .8
				inx
				lda ARGS,x
				cmp #' '
				beq .1
				cmp #'-'
				bne .7
				
				cpx ARGS
				beq .9
				inx
				lda ARGS,x
				cmp #'S'
				bne .2
				
				ldy #bSecureRead
				lda #$80
				sta (pData),y
				bra .1
				
.2				cmp #'P'			
				bne .9
				
				cpx ARGS
				beq .9
				inx
				lda ARGS,x
				cmp #' '
				bne .9
				
				cpx ARGS
				beq .9
				
				inx
				lda ARGS,x
				cmp #'"'
				bne .9
				
.3				cpx ARGS
				beq .9
				
				inx
				lda ARGS,x
				cmp #'"'
				beq .1
				phx
				>SYSCALL PutChar.A
				plx
				bcs .99
				bra .3
				
.9				jmp Cmd.Exec.ERRSYN			
				
.70				inx
				lda ARGS,x
				cmp #' '
				beq .1
				
.7				lda (ZPPTR1)
				cmp #VarLen.MAX
				beq .9
				inc
				sta (ZPPTR1)
				tay
				lda ARGS,x
				sta (ZPPTR1),y
				cpx ARGS
				bne .70
				
.8				lda (ZPPTR1)			No var name ? SYNERR
				beq .9
				
				clc
.99				rts		
*--------------------------------------
Cmd.Exec.SLEEP	lda ARGS
				beq .9

				lda #Sleep
				clc
				adc pData
				tay
				lda /Sleep
				adc pData+1
				>PUSHYA
				>PUSHW L.ARGS
				>SYSCALL AToI
				
				bcs .9
			
				rts
.9				jmp Cmd.Exec.ERRSYN				
*--------------------------------------
Cmd.Exec.PAUSE	ldy #bPause
				lda #$80
				sta (pData),y
				clc
				rts
*--------------------------------------
Cmd.Exec.EXIT	ldy #bEXIT
				lda #$FF
				sta (pData),y
				clc
				rts
*--------------------------------------
MAN
SAVE /A2OSX.SRC/SBIN/SHELL.S.CMD
LOAD /A2OSX.SRC/SBIN/SHELL.S
ASM