A2osX/SYS/KERNEL.S.STAT.txt

NEW
  AUTO 3,1
*--------------------------------------
* # ChMod
* change permissions of a file
* ## C
* `int chmod(const char *pathname, int mode);`
* ## ASM
* **In:**
* `>PUSHW mode`
* `>LDYA pathname`
* `>SYSCALL chmod`
* ## RETURN VALUE
*--------------------------------------
* only 777-555
*--------------------------------------
K.ChMod			jsr PFT.CheckPathYA
				bcs .99

				>PULLW K.S.STAT+S.STAT.MODE
				
				lda K.S.STAT+S.STAT.MODE+1
				and /S.STAT.MODE.RU
				beq .9
				
				lda K.S.STAT+S.STAT.MODE
				and #S.STAT.MODE.XO+S.STAT.MODE.RO+S.STAT.MODE.XG+S.STAT.MODE.RG+S.STAT.MODE.XU+S.STAT.MODE.RU
				cmp #S.STAT.MODE.XO+S.STAT.MODE.RO+S.STAT.MODE.XG+S.STAT.MODE.RG+S.STAT.MODE.XU+S.STAT.MODE.RU
				bne .9
				
				>MLICALL MLIGETFILEINFO
				bcs .90
				
				lda K.MLI.PARAMS+S.FI.A
				and #$3D					not S.FI.A.RN+S.FI.A.D+S.FI.A.W
				ora #S.FI.A.R
				tax
				
				lda K.S.STAT+S.STAT.MODE
				tay
				bit #S.STAT.MODE.WG
				beq .1

				txa
				ora #S.FI.A.RN
				tax
				
				tya
.1				bit #S.STAT.MODE.WU
				beq .2
				
				txa
				ora #S.FI.A.D
				tax
				
				tya
.2				bit #S.STAT.MODE.WO
				beq .3
				
				txa
				ora #S.FI.A.W
				tax
				
.3				stx K.MLI.PARAMS+S.FI.A

				>MLICALL MLISETFILEINFO
				rts
				
.9				lda #E.SYN
				sec
.90				rts
				
.99				>RET 2
*--------------------------------------
* # FStat
* Return information about a hFILE
* ## C
* `int fstat(short int hFILE, struct stat *statbuf);`
* ## ASM
* **In:**
* `>PUSHW statbuf`
* `lda hFILE`
* `>SYSCALL fstat`
* ## RETURN VALUE
*--------------------------------------
K.FStat			jsr PFT.CheckNodeA
				bcs K.FStat.9
				
				tax
				lda OF.Table.hPath-1,x
				jsr K.GetMemPtr
				
				jsr PFT.YAToMLIPATH
				
				jsr K.Stat.I	
				bcs K.Stat.9
				
				lda (pFD)				#S.FD.T
				bne K.Stat.BLK2SIZE
				
				ldy #S.FD.REG.REF
				lda (pFD),y
				sta K.MLI.PARAMS+1

				>MLICALL MLIGETEOF
				bcs K.Stat.BLK2SIZE
				
				ldy #S.STAT.SIZE+3
				lda #0
				sta (ZPPtr1),y
				
				ldx #2
				
.1				lda K.MLI.PARAMS+2,x
				dey
				sta (ZPPtr1),y
				dex
				bpl .1
				
*				clc
				rts
				
K.FStat.9		>RET 2					discard statbuf
*/--------------------------------------
* # Stat
* Return information about a file
* ## C
* `int stat(const char *pathname, struct stat *statbuf);`
* ## ASM
* **In:**
* `>PUSHW statbuf`
* `>LDYA pathname`
* `>SYSCALL stat`
* ## RETURN VALUE
*\--------------------------------------
K.Stat			jsr PFT.CheckPathYA
				bcs K.FStat.9			go discard statbuf
				
				jsr K.Stat.I
				bcs K.Stat.9
K.Stat.BLK2SIZE				
				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
K.Stat.9		rts

K.Stat.I		>PULLW ZPPtr1			Get StatBuf
				
				>MLICALL MLIGETFILEINFO
				bcs .9

				lda K.MLI.PARAMS+S.FI.A
				jsr STAT.Access2Mode
				
.2				phy
				ldy #S.STAT.MODE
				sta (ZPPtr1),y
				iny
				pla
				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
				
				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
*--------------------------------------
STAT.Access2Mode
				and #S.FI.A.FULL
				cmp #S.FI.A.FULL
				beq .7
				
				tay
				ldx #S.STAT.MODE.RO+S.STAT.MODE.RG+S.STAT.MODE.RU+S.STAT.MODE.XO+S.STAT.MODE.XG+S.STAT.MODE.XU

				bit #S.FI.A.W
				beq .1
				txa
				ora #S.STAT.MODE.WO
				tax
				
				tya

.1				asl						D in C

				bpl .2					RN in N
				
				txa
				ora #S.STAT.MODE.WG
				tax
				
.2				txa
				bcc .8
				ora #S.STAT.MODE.WU
				.HS 2C					BIT ABS
				
.7				lda #S.STAT.MODE.FO+S.STAT.MODE.FG+S.STAT.MODE.FU  rwxrwxrwx
.8				ldy /S.STAT.MODE.RU		??????R??

STAT.Access2Mode.RTS
				rts
*/-------------------------------------
* # MKDir
* create a directory
* ## C
* `int mkdir(const char *pathname, int mode);`
* ## ASM
* **In:** 
* `>PUSHW mode`
* `>LDYA pathname`
* `>SYSCALL mkdir`
* ## RETURN VALUE
* CC : success
* CS : error
* A = EC
*\-------------------------------------
K.MKDir			jsr PFT.CheckPathYA
				bcs STAT.Access2Mode.RTS
				
				lda #S.FI.T.DIR
				sta K.MLI.PARAMS+4
				stz K.MLI.PARAMS+5
				stz K.MLI.PARAMS+6
				lda #S.FI.ST.DIR
				jmp IO.MLI.CREATE
*/--------------------------------------
* # MKFIFO
* return a pathname to a new FIFO
* ## C
* `int mkfifo( char *pathname, int mode );`
* ## ASM
* **In:** 
* `>PUSHW mode`
* `>LDYA pathname`
* `>SYSCALL mkfifo`
* ## RETURN VALUE
* CC = OK, CS = ERROR
* A = hFD
*\--------------------------------------
K.MKFIFO		>STYA ZPPtr1			pathname buffer
				>PULLW K.S.STAT+S.STAT.MODE
				
				>LDYAI 512
				jsr K.pipe
				bcs STAT.Access2Mode.RTS

				sta K.S.STAT+S.STAT.DEV	hFD
				tax

				ldy #11
				lda #0
				sta (ZPPtr1),y
				dey
				
				txa
				
				and #$0F
				jsr .7
				sta (ZPPtr1),y
				dey
				
				txa
				lsr
				lsr
				lsr
				lsr
				jsr .7
				
.1				sta (ZPPtr1),y
				lda STAT.FIFO-1,y
				dey
				bpl .1

				bra K.MkNod.I
				
.7				ora #$30
				cmp #'9'+1
				bcc .8
				
				adc #6
				
.8				rts
*/--------------------------------------
* # MkNod
* Create a special or ordinary file.
* (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`
* ## RETURN VALUE
* 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
			
K.MkNod.I		ldx #2
				
.1				lda Nod.Table.hPath-2,x
				beq .2
				
				inx
				cpx #K.Nod.MAX+2
				bne .1
				
				lda #E.OOH
*				sec				
				rts
				
.2				stx .3+1				Store hFILE
				
				>LDYA ZPPtr1
				ldx #SYS.StrDup
				jsr K.SYSCALL2.BANK
				bcs .9
				txa
				
.3				ldx #$ff				SELF MODIFIED
				sta Nod.Table.hPath-2,x
				lda K.S.STAT+S.STAT.DEV
				sta Nod.Table.hFD-2,x
				
				txa						hNODE
				
				clc
.9				rts
*/--------------------------------------
* # pipe
* ## C
* `hFD pipe(int size);`
* ## ASM
* `>LDYA size`
* `>SYSCALL pipe`
* ## RETURN VALUE
* CC = OK, CS = ERROR
* A = hFD
*\--------------------------------------
K.Pipe			sta .1+1				SIZE HI

				.DO AUXPIPE=1
				ldx #SYS.NewStkObj
				jsr K.SYSCALL2.AUX		Buffer in AUX mem
				.ELSE
				jsr K.GetMem
				.FIN
				bcs .99
				
				stx .8+1				save PIPE buffer
				
				>LDYAI S.FD.PIPE
				ldx #S.MEM.F.INIT0+S.MEM.F.FD
				jsr MEM.GetMem.YAX
				
				bcs .9
				
				>STYA pFD
				
				lda #S.FD.T.PIPE
				sta (pFD)
				
.1				lda #$ff				SELF MODIFIED
				ldy #S.FD.PIPE.Free+1
				sta (pFD),y

				ldy #S.FD.PIPE.Size+1
				sta (pFD),y
				
				ldy #S.FD.PIPE.hMem
.8				lda #$ff				Self Modified
				sta (pFD),y
				txa						hFD
*				clc
				rts
				
.9				pha						save error code
				lda .8+1				get back PIPE buffer
				.DO AUXPIPE=1
				ldx #SYS.FreeStkObj
				jsr K.SYSCALL2.AUX
				.ELSE
				jsr K.FreeMem
				.FIN
				pla
				sec
				
.99				rts				
*--------------------------------------
MAN
SAVE USR/SRC/SYS/KERNEL.S.STAT
LOAD USR/SRC/SYS/KERNEL.S
ASM