PR#3
PREFIX /A2OSX.BUILD
NEW
INC 1
AUTO 6
				.LIST OFF	
*--------------------------------------
* Y,A -> Command line (formatted & not empty)
*--------------------------------------
Cmd.ExecYA		stz	Cmd.Exec.Mode

Cmd.ExecYA.1	>SYSCALL ExpandPStrYA
				>STYA ZPPtr1
				phx

				ldy #1
				ldx #0					ARGS len
				
				lda (ZPPtr1),y
.10				
*				cmp #'a'
*				bcc .11
*				cmp #'z'+1
*				bcs .11
*				eor #$20				to Uppercase
				
.11				sta CMD,y				Store Cmd in Buffer
				sty CMD					update CMD len	
				
				tya
				cmp (ZPPtr1)
				beq .13					end of string
				
				iny
				lda (ZPPtr1),y
				cmp #' '
				bne .10
				
.12				tya
				cmp (ZPPtr1)
				beq .13					end of string
				
				iny
				lda (ZPPtr1),y
				inx
				sta ARGS,x
				bra .12
				
.13				stx ARGS				update ARGS len

				pla
				>SYSCALL FreeMemA

				>LDYA L.CMDS
				>STYA ZPPtr2
				
				ldx #0
				
.1				lda (ZPPtr2)
				beq Cmd.Exec.EXT		Ending 0, must be an external Cmd....
				
				cmp CMD					Same Len ?
				bne .4
				
				tay
				
.2				lda CMD,y

				cmp #'a'				To Uppercase
				bcc .21
				cmp #'z'+1
				bcs .21
				eor #$20

.21				cmp (ZPPtr2),y
				bne .4
				dey
				bne .2
				
				jsr .5					Found an internal Cmd...
				
				bcs .3
				
				lda #0
				
.3				ldy #S.PS.RC
				sta (pPS),y
				rts
				
.5				jmp (J.INTCMDS,x)							

.4				inx
				inx
				
				lda ZPPtr2
				sec
				adc (ZPPtr2)
				sta ZPPtr2
				bcc .1
				inc ZPPtr2+1
				bra .1
				
*--------------------------------------
Cmd.Exec.EXT	ldy #1
				lda CMD,y
				cmp #'/'				Command line is already full path, no search
				beq .3
				
				>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 L.CMD
				>SYSCALL FileSearch
				bcc .2

.1				ldy #S.PS.hPREFIX		not found, try in CD
				lda (pPs),y
				>SYSCALL GetMemPtrA
				>PUSHYA					push search list
				>PUSHW L.CMD
				>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 FreeMemA		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				rts
*--------------------------------------
* TXT : Launch "/PATH/SHELL /PATH/CMD ARGS"
*--------------------------------------
Cmd.Exec.EXT.TXT
				lda #0					Get arg[0] = /PATH/SHELL
				>SYSCALL GetArgA
				>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 Cmd.Exec.Mode
				bmi .2					startproc
				
				>SYSCALL ExecProcessNewEnvYA
				rts

.2				>SYSCALL CreateProcessYA
				rts
*--------------------------------------
* Internal Commands
*--------------------------------------
Cmd.Exec.CD		lda ARGS
				bne Cmd.Exec.CD1
				
Cmd.Exec.PWD	ldy #S.PS.hPREFIX
				lda (pPs),y
				>SYSCALL GetMemPtrA
				>SYSCALL PPrintFYA
				bcs .9
				lda #13
				>SYSCALL PutCA
				lda #10
				>SYSCALL PutCA
.9				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 GetMemPtrA
				>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 FreeMemA
				
				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	Cmd.Exec.Mode

				>LDYA L.ARGS
				jmp Cmd.ExecYA.1
*--------------------------------------
Cmd.Exec.SET	lda ARGS
				bne Cmd.Exec.SETVAR
				
				ldy #S.PS.hENV
				lda (pPs),y
				>SYSCALL GetMemPtrA
				>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 PPrintFYA
				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 PPrintFYA
				
.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 PStrFTime
				
				>LDYAI UsrBuf256
				>SYSCALL PPrintFYA
				bcs .9
				lda #13
				>SYSCALL PutCA
				lda #10
				>SYSCALL PutCA
.9				rts
*--------------------------------------
Cmd.Exec.ECHO	lda ARGS
				beq .1
				
				>LDYA L.ARGS
				>SYSCALL PPrintFYA
				bcs .9
				
.1				lda #13
				>SYSCALL PutCA
				lda #10
				>SYSCALL PutCA

.9				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 PutCA
				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.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