A2osX/SYS/KERNEL.S.STAT.txt

NEW
PREFIX /A2OSX.BUILD
AUTO 4,1
*--------------------------------------
* # FStat
* Return information about a hfile
* ## C
* `int fstat(short int hFILE, struct stat *statbuf);`
* ## ASM
* **In:**
* `>PUSHW statbuf`
* `lda hFILE`
* `>SYSCALL fstat`
* **Out:**
*--------------------------------------
K.FStat			jsr PFT.CheckNodeA
				jsr K.GetMemPtr
				
				>STYA pFD
				
				lda #S.FD.REG
				clc
				adc pFD
				tay
				lda /S.FD.REG
				adc pFD+1
				jsr K.Stat.I
				bcs .9
				
				ldy #S.FD.REG.REF
				lda (pFD),y
				sta K.MLI.PARAMS+1
				>MLICALL MLIGETEOF
				bcs .9
				
				ldy #S.STAT.SIZE+3
				lda #0
				sta (ZPPtr1),y
				
				ldx #2
				
.1				dey
				lda K.MLI.PARAMS+2,x
				sta (ZPPtr1),y
				dex
				bpl .1
				
.9				rts
*/--------------------------------------
* # Stat
* Return information about a file
* ## C
* `int stat(const char *pathname, struct stat *statbuf);`
* ## ASM
* **In:**
* `>PUSHW statbuf`
* `>LDYA pathname`
* `>SYSCALL stat`
* **Out:**
*\--------------------------------------
K.Stat			jsr PFT.CheckPathYA
K.Stat.I		jsr STDIO.SetMLIPathYA
				
				>PULLW ZPPtr1
				
				>MLICALL MLIGETFILEINFO
				bcs .9
				
				ldx K.MLI.PARAMS+S.FI.A

				lda #S.STAT.MODE.XO+S.STAT.MODE.WO+S.STAT.MODE.RO
				cpx #S.FI.A.FULL
				beq .2

				lda #S.STAT.MODE.XO+S.STAT.MODE.RO	
				cpx #S.FI.A.R
				beq .2

				lda #0
				
.2				ldy #S.STAT.MODE				
				sta (ZPPtr1),y

				ldx #K.Stat.DST-K.Stat.SRC

.3				ldy K.Stat.SRC-1,x
				lda K.MLI.PARAMS,y
				ldy K.Stat.DST-1,x
				sta (ZPPtr1),y
				dex
				bne .3
				
				ldy #S.STAT.SIZE
				lda #0
				sta (ZPPtr1),y
				
				iny
				
				lda K.MLI.PARAMS+S.FI.UBLKS
				asl
				sta (ZPPtr1),y
				
				iny
				
				lda K.MLI.PARAMS+S.FI.UBLKS+1
				rol
				sta (ZPPtr1),y
				
				iny
				
				lda #0
				rol
				sta (ZPPtr1),y
				
				clc
.9				rts
*--------------------------------------
K.Stat.SRC		.DA #S.FI.T
				.DA #S.FI.AUXTYPE,#S.FI.AUXTYPE+1
				.DA #S.FI.UBLKS,#S.FI.UBLKS+1
K.Stat.DST		.DA #S.STAT.P.TYPE
				.DA #S.STAT.P.AUXTYPE,#S.STAT.P.AUXTYPE+1
				.DA #S.STAT.BLOCKS,#S.STAT.BLOCKS+1
*/-------------------------------------
* # MKDir
* create a directory
* ## C
* `int mkdir(const char *pathname, int mode);`
* ## ASM
* **In:** 
* `>PUSHW mode`
* `>LDYA pathname`
* `>SYSCALL mkdir`
* **Out:**
* CC : success
* CS : error
* A = EC
*\-------------------------------------
K.MKDir			jsr PFT.CheckPathYA
				jsr STDIO.SetMLIPathYA
				
				lda #S.FI.A.FULL
				sta K.MLI.PARAMS+S.FI.A
				lda #S.FI.T.DIR
				sta K.MLI.PARAMS+S.FI.T
				lda #S.FI.ST.DIR
				sta K.MLI.PARAMS+S.FI.ST
				
*				jsr DATETIME
				
				ldx #3
.1				lda DATELO,x
				sta K.MLI.PARAMS+8,x
				dex
				bpl .1
				
				>MLICALL MLICREATE
				rts
*/--------------------------------------
* # MkNod
* return a hFile for a given file descriptor.
* (CDEV, BDEV, DSOCKS, SSOCK, PIPE)
* ## C
* `hFILE mknod(const char *pathname, int mode, hFD fd);`
* ## ASM
* **In:** 
* `>PUSHB fd`
* `>PUSHW mode`
* `>LDYA pathname`
* `>SYSCALL mknod`
* **Out:**
* CC = OK, CS = ERROR
* A = hFILE
*\--------------------------------------
K.MkNod 		>STYA ZPPtr1			pathname
				
				>PULLW K.S.STAT+S.STAT.MODE
				>PULLB K.S.STAT+S.STAT.DEV
				
				jsr K.GetMemPtr
				bcs .99
				
				>STYA pFD
				
				ldx DevMgr.NodCnt
				cpx #K.NOD.MAX
				beq .98
				
.1				dex
				bpl .
				lda 

				lda (pFD)				#S.FD.T
				
				tax
				jmp (.8,x)
				
.8				.DA STDIO.IOERR			REG
				.DA STDIO.IOERR			DIR
				.DA STAT.MKNOD.CDEV
				.DA STAT.MKNOD.BDEV
				.DA STDIO.IOERR			LNK
				.DA STAT.MKNOD.DSOCK
				.DA STAT.MKNOD.SSOCK
				.DA STDIO.IOERR			FIFO
	
.98				lda #K.E.OOH
				sec
.99				rts				
*--------------------------------------				
STAT.MKNOD.CDEV
STAT.MKNOD.BDEV
STAT.MKNOD.DSOCK
STAT.MKNOD.SSOCK

				ldx #S.STAT
				ldy #$ff
				
.1				inx
				iny
				lda (ZPPtr1),y
				bne .1
				
				txa
				tay
				lda #0
				jsr K.GetMem
				bcs .9
				>STYA ZPPtr2
				
				
.9				rts				
*/--------------------------------------
* # MKFIFO
* return a hFILE to a new FIFO
* ## C
* `hFILE mkfifo(const char *pathname, int mode);`
* ## ASM
* **In:** 
* `>PUSHW mode`
* `>LDYA pathname`
* `>SYSCALL mkfifo`
* **Out:**
* CC = OK, CS = ERROR
* A = hFILE
*\--------------------------------------
K.MKFIFO		>LDYAI 256
				jsr K.GetMem
				bcs .99
				
				stx .1+1				save FIFO buffer
				
				>LDYAI S.FD.FIFO
				jsr K.GetMem0
				
				bcs .9
				
				>STYA pFD
				
				ldy #S.FD.T
				lda #S.FD.T.FIFO
				sta (pFD),y
				
				iny						S.FD.FIFO.hMem
.1				lda #$ff				Self Modified
				sta (pFD),y
				txa
				clc
				rts
				
.9				pha						save error code
				lda .1+1				get back FIFO buffer
				jsr K.FreeMem
				pla
				sec
				
.99				rts				
*--------------------------------------
MAN
SAVE /A2OSX.SRC/SYS/KERNEL.S.STAT
LOAD /A2OSX.SRC/SYS/KERNEL.S
ASM