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
* **In:** 
*  Y,A = DIR name
* **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
* int mknod(const char *pathname, mode_t mode, dev_t dev);
* return a hFile for a given Device Name
* **In:** 
*  Y,A=DevName
* **Out:**
*  CC = OK, CS = ERROR
*  A = hFILE
*\--------------------------------------
K.MkNod 		jsr K.GetDevByName		Y,A=NAME
				bcs .9
				>STYA .1+1				pFD
				stx .2+1				devID
				
				ldy #S.FD.T
				lda (pFD),y
				cmp #S.FD.T.CDEV
				bne .99

				txa						Pass DEV.ID to OPEN
				ldx #IOCTL.OPEN
.1				jsr $FFFF				SELF MODIFIED
				bcs .9
				
				>LDYAI S.FD.DEV
				jsr K.GetMem0
				bcs .9

				>STYA ZPPtr3			Ptr3=S.FD
				
				ldy #S.FD.T
				lda #S.FD.T.CDEV
				sta (ZPPtr3),y
				
				ldy	#S.FD.DEV.DEVID
				
.2				lda #$ff				Self Modified
				sta (ZPPtr3),y

				ldy	#S.FD.DEV.DRVPTR
				lda .1+1
				sta (ZPPtr3),y

				iny
				lda .1+2
				sta (ZPPtr3),y
				txa
				clc
.9				rts

.99				lda #MLI.E.IO
				sec
				rts			
*/--------------------------------------
* # MKFIFO
* int mkfifo(const char *pathname, mode_t mode);
* return a hFILE to a new FIFO
* **In:** 
* **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