NEW
PREFIX
AUTO 4,1
				.LIST OFF
				.OP	65C02
				.OR	$2000
				.TF BIN/SH
*--------------------------------------
History.MAX		.EQ 256
CORE.STACK.MAX	.EQ 64
PUSHD.STACK.MAX	.EQ 8
*--------------------------------------
C.NOHUP			.EQ 0
C.CD			.EQ 2
C.DATE			.EQ 4
C.ECHO			.EQ 6
C.EXIT			.EQ 8
C.GETKEY		.EQ 10
C.MD			.EQ 12
C.PAUSE			.EQ 14
C.PWD			.EQ 16
C.RD			.EQ 18
C.READ			.EQ 20
C.REN			.EQ 22
C.SET			.EQ 24
C.SLEEP			.EQ 26
C.SHIFT			.EQ 28
C.TIME			.EQ 30
C.PUSHD			.EQ 32
C.POPD			.EQ 34
C.BREAK			.EQ 36
C.CONTINUE		.EQ 38
*--------------------------------------
C.FOR			.EQ 40
C.WHILE			.EQ 42
C.IF			.EQ 44
C.NEXT			.EQ 46
C.LOOP			.EQ 48
C.ELSE			.EQ 50
C.FI			.EQ 52
*--------------------------------------
E.CSYN			.EQ $C0
E.ESYN			.EQ $C1
E.STACKERROR	.EQ $C2
E.STKOVERFLOW	.EQ $C3
E.NOWHILE		.EQ $C4
E.NOFOR			.EQ $C5
E.NOIF			.EQ $C6
E.BADEXP		.EQ $C7
E.BADFTYPE		.EQ $C8
*--------------------------------------
				.INB INC/MACROS.I
				.INB INC/A2OSX.I
				.INB INC/MLI.I
				.INB INC/MLI.E.I
*--------------------------------------
				.DUMMY
				.OR ZPBIN
ZS.START
ZPCLBuf			.BS 2
ZPInputBuf		.BS 2
ZPInputBufPtr	.BS 2
ZPInputCmdPtr	.BS 2
ZPArgVBuf		.BS 2
ZPArgVBufPrev	.BS 2
ZPArgVBufPtr	.BS 2
ZPVarNamePtr	.BS 2
ZPPtr1			.BS 2
ZPPtr2			.BS 2
TmpWord			.BS 2
TmpByte			.BS 1
ZS.END			.ED				
*--------------------------------------
*			File Header (16 Bytes)
*--------------------------------------
CS.START		cld
				jmp (.1,x)
				.DA #$61				6502,Level 1 (65c02)
				.DA #1					BIN Layout Version 1
				.DA #S.PS.F.EVENT		S.PS.F
				.DA #0
				.DA CS.END-CS.START		Code Size (without Constants)
				.DA DS.END-DS.START		Data SegmentSize
				.DA #64					Stack Size
				.DA #ZS.END-ZS.START	Zero Page Size
				.DA 0
*--------------------------------------
* Relocation Table
*--------------------------------------
.1				.DA CS.INIT
				.DA CS.RUN
				.DA CS.DOEVENT
				.DA	CS.QUIT
*--------------------------------------
L.MSG.GREETINGS	.DA MSG.GREETINGS
L.MSG.PROMPT	.DA MSG.PROMPT
L.MSG.TRACE		.DA MSG.TRACE
L.MSG.ECHOCRLF	.DA MSG.ECHOCRLF
L.MSG.BATCHERR	.DA MSG.BATCHERR
L.MSG.ERROR		.DA MSG.ERROR
L.MSG.PRINTENV	.DA MSG.PRINTENV
L.MSG.PID		.DA MSG.PID
L.ENV.ROOT		.DA ENV.ROOT
L.ENV.PATH		.DA ENV.PATH
L.ENV.PWD		.DA ENV.PWD
L.ENV.PS1		.DA ENV.PS1
L.ENV.HOME		.DA ENV.HOME
L.FMT.DATE		.DA FMT.DATE
L.FMT.TIME		.DA FMT.TIME
L.FMT.GETKEY	.DA FMT.GETKEY
J.ESC			.DA CL.BS			left arrow
				.DA HIS.GetNext			
				.DA HIS.GetPrev
				.DA CL.NAK			right arow
L.CMD			.DA CMD
J.CMD			.DA CMD.NOHUP
				.DA CMD.CD
				.DA CMD.DATE
				.DA CMD.ECHO
				.DA CMD.EXIT
				.DA CMD.GETKEY
				.DA CMD.MD
				.DA CMD.PAUSE
				.DA CMD.PWD
				.DA CMD.RD
				.DA CMD.READ
				.DA CMD.REN
				.DA CMD.SET
				.DA CMD.SLEEP
				.DA CMD.SHIFT
				.DA CMD.TIME
				.DA CMD.PUSHD
				.DA CMD.POPD
				.DA CMD.BREAK
				.DA CMD.CONTINUE
				.DA CMD.FOR
				.DA CMD.WHILE
				.DA CMD.IF
				.DA CMD.NEXT
				.DA CMD.LOOP
				.DA CMD.ELSE
				.DA CMD.FI
L.CORE.IO		.DA CORE.IO
J.CORE.IO		.DA CORE.IO.AMP
				.DA CORE.IO.IN
				.DA CORE.IO.OUTA
				.DA CORE.IO.OUT
				.DA CORE.IO.1OUTA
				.DA CORE.IO.1OUT
				.DA CORE.IO.2OUTA
				.DA CORE.IO.2OUT
L.EXP.BEGIN		.DA EXP.BEGIN
L.EXP.OP.UNARY	.DA EXP.OP.UNARY
J.EXP.OP.UNARY	.DA EXP.OP.UNARY.D
				.DA EXP.OP.UNARY.E
				.DA EXP.OP.UNARY.F
				.DA EXP.OP.UNARY.N
				.DA EXP.OP.UNARY.Z
L.EXP.OP.BINARY	.DA EXP.OP.BINARY
L.EXP.OP.MATH	.DA EXP.OP.MATH
J.EXP.OP.MATH	.DA M32.Add
				.DA M32.Sub
				.DA M32.Mul
				.DA M32.Div
				.DA M32.Mod
L.HOME.PROFILE	.DA HOME.PROFILE
L.M32.Printf	.DA M32.Printf
L.ERR.Codes		.DA ERR.Codes
L.ERR.Messages	.DA ERR.Messages
L.NOD.Template	.DA NOD.Template
				.DA 0
*--------------------------------------
CS.INIT			clc
CS.INIT.RTS		rts
*--------------------------------------
CS.RUN			jsr CL.Init
				jsr CORE.Init
				
				ldy #S.PS.ARGC
				lda (pPS),y
				beq .1					no arg, continue starting interactive

				>PUSHWI 0				Aux type
				>PUSHBI S.FI.T.TXT
				>PUSHBI	O.RDONLY
				lda #1
				>SYSCALL ArgV
				>SYSCALL LoadTxtFile
				bcs CS.INIT.RTS
				
				txa
				>STA.G hInputBuf
				>SYSCALL GetMemPtr
				>STYA ZPInputBuf
				>STYA ZPInputBufPtr
				
				lda #0
				jsr CMD.SHIFTA		Remove $0=/bin/sh

				lda #$ff
				>STA.G bBatchMode
				
				bra CS.RUN.LOOP
*--------------------------------------				
.1				jsr CMD.CD.HOME
				jsr HIS.Init
				bcs CS.INIT.RTS

				>PUSHWI K.VER
				>PUSHBI 2
				>LDYA L.MSG.GREETINGS
				>SYSCALL printf
				bcs CS.INIT.RTS
				
				>PUSHEA.G StatBuf
				>LDYA L.HOME.PROFILE
				>SYSCALL STAT
				bcs CS.RUN.LOOP
				
				>PUSHBI S.PS.F.HOLD
				>LDYA L.HOME.PROFILE
				>SYSCALL execl
*--------------------------------------
CS.RUN.LOOP		>SLEEP

.1				jsr CheckSleep
				beq .3

				ldy #S.PS.hStdIn
				lda (pPS),y
				>SYSCALL feof
				bcs .9
				
				tay
				beq CS.RUN.LOOP
				
				>SYSCALL GetChar
				bcs .9					I/O err
				
				cmp #3					Ctrl-C
				bne CS.RUN.LOOP
				
				>LDA.G bBatchMode		batch mode ?
				beq CS.RUN.LOOP
				
				>LDA.G bSET.C
				beq .8
				bra CS.RUN.LOOP

.3				>LDA.G bPause
				bpl .6
				
.4				>SYSCALL GetChar
				bcs	.9					I/O err
				
.5				cmp #3					Ctrl-C
				bne .60
				
				>LDA.G bBatchMode		batch mode ?
				beq .61
				
				>LDA.G bSET.C
				beq .8
				bra .61
				
.60				cmp #C.CR
				bne .4
				
.61				>STZ.G bPause
				bra .62

.6				>LDA.G bReadMode		read mode ?
				bne .7
				
.62				>LDA.G bBatchMode		batch mode ?
				beq CS.RUN.INTERACTIVE
				jmp CS.RUN.BATCH
.7				jmp CS.RUN.READ

.8				lda #3					User Interrupt
				sec
.9				rts
*--------------------------------------
CS.RUN.INTERACTIVE
				>LDA.G hInputBuf		some commmands left in buffer
				beq .10
				
				lda (ZPInputBufPtr)
				bne .6

				>LDA.G hInputBuf
				>SYSCALL freemem
				>STZ.G hInputBuf
				
.10				jsr IO.Reset
				jsr CL.Reset
				jsr CL.PrintPrompt
				bcs .9

.1				>SYSCALL GetChar
				bcs .9						I/O error 
				
.2				cmp #C.EOF				....or Ctrl-D
				beq .9					CS

				jsr CL.CHARIN

				>LDA.G CL.bReady			Something to execute ?
				bpl .1
				
				>PUSHBI 0
				>LDYA L.MSG.ECHOCRLF
				>SYSCALL printf
				bcs .9
				
				lda (ZPCLBuf)
				beq .8					Empty line

				jsr HIS.Add

				>LDYA ZPCLBuf
				>SYSCALL strdup
				bcs .8
				>STYA ZPInputBuf
				>STYA ZPInputBufPtr
				txa
				>STA.G hInputBuf

.6				jsr CORE.Run
				
.8				jmp CS.RUN.LOOP.END

.9				rts			
*--------------------------------------
CS.RUN.READ		jsr CL.RESET
				
.1				>SYSCALL GetChar
				bcs CS.RUN.READ.9

				jsr CL.CHARIN

				>LDA.G CL.bReady
				bpl .1

.12				lda (ZPCLBuf)
				bne .2
				
				>LDYA ZPVarNamePtr
				>SYSCALL UnSetEnv
				bra .7
				
.2				>PUSHW ZPCLBuf

				>LDYA ZPVarNamePtr
				>SYSCALL SetEnv
				
.7				php
				pha

				>STZ.G bReadMode
				>STA.G bREAD.S
				
				pla
				plp
				
.8				jmp CS.RUN.LOOP.END
CS.RUN.READ.9	rts
*--------------------------------------
CS.RUN.BATCH	
*				ldy #S.PS.hStdIn
*				lda (pPS),y
*				>SYSCALL feof
*				bcs .2					unsupported
				
*				tay
*				beq .2
				
*				>SYSCALL GetChar
*				bcs CS.RUN.READ.9
				
*				cmp #3					test Ctrl-c
*				bne .1

*				sec
*				rts

*.1				cmp #19					test Ctrl-s
*				bne .2

*				lda #$80
*				>STA.G bPause
*				clc
*				jmp CS.RUN.LOOP.END

.2				>LDA.G bSET.X
				beq .5

				ldy #$ff
				
.3				iny
				lda (ZPInputBufPtr),y
				sta (ZPArgVBuf),y
				beq .4
				eor #C.CR
				bne .3
				sta (ZPArgVBuf),y
				
.4				>PUSHW ZPArgVBuf
				>PUSHBI 2
				>LDYA L.MSG.TRACE
				>SYSCALL printf
				bcs CS.RUN.LOOP.RTS

.5				jsr CORE.Run
				bcc CS.RUN.LOOP.END

				tay							0 = EOF
				bne CS.RUN.LOOP.END
				
				pha
				lda #$ff
				>STA.G bExit
				pla
				
CS.RUN.LOOP.END	ldy #S.PS.RC
				sta (pPs),y
				
				bcc CS.RUN.LOOP.8
				tay
				beq CS.RUN.LOOP.8
				>LDA.G bBatchMode			batch mode ?
				beq .1
				
				jsr IO.PrintBatchErrMsg
				bcs CS.RUN.LOOP.RTS
				
.1				ldy #S.PS.RC
				lda (pPs),y
				
				jsr IO.PrintErrMsg
				bcs CS.RUN.LOOP.RTS
				
CS.RUN.LOOP.8	>LDA.G bExit
				beq CS.RUN.LOOP.80
				
				ldy #S.PS.RC
				lda (pPs),y
				
				sec
CS.RUN.LOOP.RTS	rts
				
CS.RUN.LOOP.80	jmp CS.RUN.LOOP
*--------------------------------------
CS.DOEVENT		lda (pEvent)
				bpl .9

				jsr CheckSleep
				beq .9

*				ldy #Sleep				already set by CheckSleep
				
				ldx #4
				
				clc
				
.1				lda (pData),y
				sbc #0
				sta (pData),y
				iny
				dex
				bne .1

.9				sec
				rts
*--------------------------------------
CS.QUIT			>LDA.G hInputBuf		
				beq .1
				
				>SYSCALL FreeMem
				
.1				jsr HIS.Quit
				jsr CL.Quit
				jsr CORE.Quit
				clc
				rts
*--------------------------------------
CheckSleep		ldy #Sleep+3
				lda (pData),y
				dey
				ora (pData),y
				dey
				ora (pData),y
				dey
				ora (pData),y
				rts
*--------------------------------------
RemoveStrFromArgV
				>STYA ZPPtr1
				>STYA ZPPtr2

				ldy #$ff
				
.1				iny						Compute ArgX len
				lda (ZPPtr1),y			
				bne .1
				
.2				tya
				sec
				adc ZPPtr1
				sta ZPPtr1
				bcc .3
				inc ZPPtr1+1
				
.3				ldy #$ff
				
.4				iny
				lda (ZPPtr1),y
				sta (ZPPtr2),y
				bne .4
				tya
				beq .8
				
				sec
				adc ZPPtr2
				sta ZPPtr2
				bcc .2
				inc ZPPtr2+1
				bra .2
				
.8				rts
*--------------------------------------
				.INB USR/SRC/BIN/SH.S.CL
				.INB USR/SRC/BIN/SH.S.HIS
				.INB USR/SRC/BIN/SH.S.CORE
				.INB USR/SRC/BIN/SH.S.IO
				.INB USR/SRC/BIN/SH.S.CMD
				.INB USR/SRC/BIN/SH.S.EXP
*--------------------------------------
CS.END
*--------------------------------------
MSG.GREETINGS	.AZ "\r\nA2osX-SH %d.%d\r\n\r\n"
MSG.PROMPT		.AZ "\e[7h$ "
MSG.TRACE		.AZ ">%s\r\n"
MSG.BATCHERR	.AZ "^\r\nLine #%D:"
MSG.ERROR		.AS "[$%h]:%S."
MSG.ECHOCRLF	.AZ "\r\n"
MSG.PRINTENV	.AZ "%s = %s\r\n"
MSG.PID			.AZ "PID=%d\r\n"
FMT.DATE		.AZ "%A (%w), %B %d %Y"
FMT.TIME		.AZ "%H:%M:%S (%I:%M:%S%p)"
FMT.GETKEY		.AZ "%d"		
*--------------------------------------
ENV.ROOT		.AZ "ROOT"
ENV.PATH		.AZ "PATH"
ENV.PWD			.AZ "PWD"
ENV.PS1			.AZ "PS1"
ENV.HOME		.AZ "HOME"
HOME.PROFILE	.AZ "${HOME}PROFILE"
*--------------------------------------
CMD				.AZ "NOHUP"
				.AZ "CD"
				.AZ "DATE"
				.AZ "ECHO"
				.AZ "EXIT"
				.AZ "GETKEY"
				.AZ "MD"
				.AZ "PAUSE"
				.AZ "PWD"
				.AZ "RD"
				.AZ "READ"
				.AZ "REN"
				.AZ "SET"
				.AZ "SLEEP"
				.AZ "SHIFT"
				.AZ "TIME"
				.AZ "PUSHD"
				.AZ "POPD"
				.AZ "BREAK"
				.AZ "CONTINUE"
				.AZ "FOR"
				.AZ "WHILE"
				.AZ "IF"
				.AZ "NEXT"
				.AZ "LOOP"
				.AZ "ELSE"
				.AZ "FI"
				.HS 00
*--------------------------------------
* https://www.tldp.org/LDP/abs/html/io-redirection.html
*--------------------------------------
CORE.IO			.AZ "&"
				.AZ "<"
				.AZ ">>"
				.AZ ">"
				.AZ "1>>"
				.AZ "1>"
				.AZ "2>>"
				.AZ "2>"
				.HS 00
*--------------------------------------
EXP.BEGIN		.AZ "!["
				.AZ "["
				.HS 00
EXP.OP.UNARY	.AZ "-D"
				.AZ "-E"
				.AZ "-F"
				.AZ "-N"
				.AZ "-Z"
				.HS 00
EXP.OP.BINARY	.AZ "="
				.AZ "!="
				.AZ "-EQ"
				.AZ "-NE"
				.AZ "-LT"
				.AZ "-LE"
				.AZ "-GT"
				.AZ "-GE"
				.HS 00
EXP.OP.BINARY.BITS
				.DA #%000
				.DA #%000
				.DA #%010
				.DA #%101
				.DA #%100
				.DA #%110
				.DA #%001
				.DA #%011
EXP.OP.MATH		.AZ "+"
				.AZ "-"
				.AZ "*"
				.AZ "div"
				.AZ "mod"
				.HS 00
*--------------------------------------
				.INB USR/SRC/X.M32.S
				.INB USR/SRC/X.ERRORS.S
*--------------------------------------
EscChars		.AS 'DBAC'
EscChars.Cnt	.EQ *-EscChars
NOD.Template	.AZ "/DEV/PIPE%h"
M32.Printf		.AZ "%L"
*--------------------------------------
				.DUMMY
				.OR 0
DS.START
CORE.STACK		.BS CORE.STACK.MAX+1	pData (0 = Stack Ptr)
PUSHD.STACK		.BS PUSHD.STACK.MAX+1

hInputBuf		.BS 1

bReadMode		.BS 1
bBatchMode		.BS 1

bEscMode		.BS 1
bPause			.BS 1
bExit			.BS 1

bSET.C			.BS 1
bSET.X			.BS 1

bREAD.S			.BS 1

Sleep			.BS 4
StatBuf			.BS S.STAT
TimeBuf			.BS S.TIME

CL.hCLBuf		.BS 1
CL.Ptr			.BS 1
CL.Len			.BS 1
CL.bReady		.BS 1

CORE.IntCmd		.BS 1
CORE.hArgVBuf	.BS 1

CORE.ArgIndex	.BS 1
CORE.Test		.BS 1
CORE.Operator	.BS 1
CORE.PSFlags	.BS 1

HIS.hBuf		.BS 1
HIS.Count		.BS 1
HIS.Index		.BS 1

IO.hIn			.BS 1
IO.hOut			.BS 1
IO.hErr			.BS 1
IO.hPipe		.BS 1
IO.NodBuf		.BS 12					/DEV/PIPExx\0
*--------------------------------------
M32.BUF			.BS 12					-1234567890\0				
M32.ACC			.BS 4
M32.ARG			.BS 4
M32.TMP			.BS 4				
DS.END			.ED
*--------------------------------------
MAN
SAVE USR/SRC/BIN/SH.S
ASM