A2osX/SYS/KERNEL.S.UNISTD.txt

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2019-07-27 20:51:39 +00:00
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AUTO 3,1
*/--------------------------------------
* # open
* ## C
* `hFD open(const char *pathname, short int flags);`
* ## ASM
* **In:**
* `>PUSHB flags`
* `>LDYA pathname`
* `>SYSCALL open`
* ## RETURN VALUE
* A = hFD
* REG File created on ProDOS : T=TXT,X=$0000
*\--------------------------------------
.DUMMY
.OR ZPTMP+20 7 Bytes
IO.Open.FLAGS .BS 1
IO.Open.TYPE .BS 1
IO.Open.AUXTYPE .BS 2
IO.hFD .BS 1
.ED
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*--------------------------------------
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K.Open jsr PFT.YAToMLIPATH
>PULLB IO.Open.FLAGS
lda #S.FI.T.TXT
sta IO.Open.TYPE
stz IO.Open.AUXTYPE
stz IO.Open.AUXTYPE+1
*--------------------------------------
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UNISTD.Open ldx #5 /DEV/
cpx K.MLI.PATH
bcs .99
.1 lda K.MLI.PATH,x
cmp DEV.FIFO-1,x
bne .99
dex
bne .1
*--------------------------------------
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* /DEV/xxxxxx (CDEV,BDEV,DSOCK,SSOCK,PIPE)
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*--------------------------------------
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>LDYAI K.MLI.PATH+6 skip $/DEV/
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jsr K.GetDevByName
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bcc .7
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ldx #2
.10 lda Nod.Table.hPath-2,x
beq .3
jsr K.GetMemPtr
>STYA ZPPtr1
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ldy #0
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.2 lda (ZPPtr1),y
iny
cmp K.MLI.PATH,y
bne .3
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cmp #0 end of string ?
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bne .2
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lda Nod.Table.hFD-2,x return hFD
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jsr UNISTD.GetPFD
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bra .71
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.3 inx
cpx #K.NOD.MAX+2
bne .10
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lda #MLI.E.NODEV
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* sec
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rts no OF found
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*--------------------------------------
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.7 stx IO.hFD
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>STYA pFD
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.71 lda (pFD) #S.FD.T
tax
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jmp (.8-2,x)
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.8
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* .DA STDIO.IOERR REG
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.DA STDIO.IOERR DIR
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.DA IO.OPEN.CDEV
.DA IO.OPEN.BDEV
.DA STDIO.IOERR LNK
.DA IO.OPEN.DSOCK
.DA IO.OPEN.SSOCK
.DA IO.OPEN.PIPE
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.99 jmp IO.OPEN.REG
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*/--------------------------------------
* # close
* ## C
* `int close(hFD fd);`
* ## ASM
* **In:**
* `lda fd`
* `>SYSCALL close`
*\--------------------------------------
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K.Close jsr UNISTD.GetPFD
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UNISTD.Close lda (pFD) #S.FD.T
tax
jmp (.1,x)
.1 .DA IO.CLOSE.REG
.DA IO.CLOSE.DIR
.DA IO.CLOSE.CDEV
.DA IO.CLOSE.BDEV
.DA STDIO.IOERR LNK
.DA IO.CLOSE.DSOCK
.DA IO.CLOSE.SSOCK
.DA IO.CLOSE.PIPE
*/--------------------------------------
* # read
* ## C
* `int read(hFD fd, void *buf, int count);`
* ## ASM
* **In:**
* `>PUSHWI count`
* `>PUSHW buf`
* `lda fd`
* `>SYSCALL read`
* ## RETURN VALUE
* CC: Y,A = bytes read
* CS: A = EC
*\--------------------------------------
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K.Read jsr UNISTD.GetPFD
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UNISTD.Read lda (pFD) #S.FD.T
tax
jmp (.1,x)
.1 .DA IO.READ.REG
.DA STDIO.IOERR DIR
.DA IO.READ.CDEV
.DA STDIO.IOERR BDEV
.DA STDIO.IOERR LNK
.DA STDIO.IOERR DSOCK
.DA IO.READ.SSOCK
.DA IO.READ.PIPE
*/--------------------------------------
* # write
* ## C
* `int write(hFD fd, const void *buf, int count);`
* ## ASM
* **In:**
* `>PUSHWI count`
* `>PUSHW buf`
* `lda fd`
* `>SYSCALL write`
* ## RETURN VALUE
* CC: Y,A = bytes written
* CS: A = EC
*\--------------------------------------
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K.Write jsr UNISTD.GetPFD
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UNISTD.Write lda (pFD) #S.FD.T
tax
jmp (.1,x)
.1 .DA IO.WRITE.REG
.DA STDIO.IOERR DIR
.DA IO.WRITE.CDEV
.DA STDIO.IOERR BDEV
.DA STDIO.IOERR LNK
.DA STDIO.IOERR DSOCK
.DA IO.WRITE.SSOCK
.DA IO.WRITE.PIPE
*--------------------------------------
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UNISTD.GetPFD sta IO.hFD
jsr K.GetMemPtr
>STYA pFD
rts
*--------------------------------------
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IO.OPEN.CDEV
IO.OPEN.BDEV jsr SHARED.GetPDrv
ldx #IOCTL.OPEN
lda IO.hFD
jsr SHARED.pDrvJmp
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bcs IO.WRITE.CDEV.RTS
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*--------------------------------------
IO.OPEN.DSOCK
*--------------------------------------
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IO.OPEN.SSOCK
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lda IO.hFD
*--------------------------------------
IO.CLOSE.CDEV
IO.CLOSE.BDEV
clc
rts
*--------------------------------------
IO.READ.CDEV ldx #IOCTL.READ
.HS 2C BIT ABS
*--------------------------------------
IO.WRITE.CDEV ldx #IOCTL.WRITE
>PULLW K.S.IOCTL+S.IOCTL.BUFPTR
>PULLW K.S.IOCTL+S.IOCTL.BYTECNT
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jsr SHARED.GetPDrv
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>LDYAI K.S.IOCTL
jsr SHARED.pDrvJmp
bcs .9
>LDYA K.S.IOCTL+S.IOCTL.BYTECNT
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.9
IO.WRITE.CDEV.RTS
rts
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*--------------------------------------
IO.CLOSE.DSOCK
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IO.CLOSE.SSOCK
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ldy #S.FD.SSOCK.CLOSE
.HS 2C BIT ABS
*--------------------------------------
IO.EOF.SSOCK ldy #S.FD.SSOCK.EOF
.HS 2C BIT ABS
*--------------------------------------
IO.READ.SSOCK ldy #S.FD.SSOCK.READ
.HS 2C BIT ABS
*--------------------------------------
IO.WRITE.SSOCK ldy #S.FD.SSOCK.WRITE
lda (pFD),y
tax Function Offset in LIB
ldy #S.FD.SSOCK.IOHANDLER
lda (pFD),y
jsr K.GetMemPtr
>STYA .1+1
lda IO.hFD
.1 jmp $FFFF SELF MODIFIED
*--------------------------------------
IO.EOF.CDEV lda #S.IOCTL.STATCODE.EOF
jmp SHARED.GetDevStatus
*--------------------------------------
* X = 0 > REG
* X = 1 > DIR
* X = 2 > PIPE
*--------------------------------------
IO.MkFD stx .8+1
ldy IO.MkFD.Y,x
lda #0
ldx #S.MEM.F.INIT0+S.MEM.F.FD
jsr MEM.GetMem.YAX
bcs .9
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>STYA pFD
stx IO.hFD
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.8 ldx #$ff SELF MODIFIED
lda IO.MkFD.T,x
sta (pFD) X = hFD, A = T
* clc
.9 rts
IO.MkFD.Y .DA #S.FD.REG,#S.FD.DIR,#S.FD.PIPE
IO.MkFD.T .DA #S.FD.T.REG,#S.FD.T.DIR,#S.FD.T.PIPE
*--------------------------------------
IO.CLOSE.NOD ldx #2
lda IO.hFD
.1 cmp Nod.Table.hFD-2,x
bne .2
stz Nod.Table.hFD-2,x
lda Nod.Table.hPath-2,x
stz Nod.Table.hPath-2,x
jmp K.FreeMem
.2 inx
cpx #K.Nod.MAX+2
bne .1
lda #E.INVH
* sec
rts
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*/--------------------------------------
* # ChOwn
* ## C
* `short int chown(const char *pathname, short int owner, short int group);`
* ## ASM
* **In:**
* `>PUSHW pathname`
* `>PUSHB owner`
* `>PUSHB group`
* `>SYSCALL chown`
* ## RETURN VALUE
*\--------------------------------------
K.ChOwn clc
rts
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*--------------------------------------
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SHARED.GetPDrv ldy #S.FD.DEV.DRVPTR
lda (pFD),y
sta pDRV
iny
lda (pFD),y
sta pDRV+1
rts
*--------------------------------------
DEV.FIFO .AS "/dev/fifo" STAT,UNISTD
*--------------------------------------
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MAN
SAVE USR/SRC/SYS/KERNEL.S.UNISTD
LOAD USR/SRC/SYS/KERNEL.S
ASM