PR#3
PREFIX /A2OSX.SRC
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
				bne .4
				
				tay
				
.2				lda CMD,y
.3				cmp (ZPPtr2),y
				bne .4
				dey
				bne .2
				
				jsr .5		Found an internal Cmd...
				bcs .31
				lda #0
.31				ldy #S.PS.RC
				sta (pPS),y
				rts
				
.4				inx
				inx
				
				lda ZPPtr2
				sec
				adc (ZPPtr2)
				sta ZPPtr2
				bcc .1
				inc ZPPtr2+1
				bra .1
				
.5				jmp (J.INTCMDS,x)							
*--------------------------------------
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
.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 CPrintFYA
				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 CPrintFYA
				
.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
.9				rts
*--------------------------------------
Cmd.Exec.ECHO	lda ARGS
				beq .1
				
				>LDYA L.ARGS
				>SYSCALL PPrintFYA
				bcs .9
				
.1				lda #13
				>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 SBIN/SHELL.S.CMD
LOAD SBIN/SHELL.S
ASM