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
* `>PUSHW pathname`
* `>PUSHW mode`
* `>SYSCALL chmod`
* ## RETURN VALUE
*\--------------------------------------
K.ChMod			jsr PFT.CheckPath2
				bcs STAT.RET4

				jsr STAT.PM

				stz K.MLI.PARAMS+3+S.FIEX.ACL		read mode
				
				>MLICALL MLIACL
				bcs .9

				>LDYA K.S.STAT+S.STAT.MODE
				>STYA K.MLI.PARAMS+3+S.FIEX.ACL.MOD
	
				lda #$57							write mode
				sta K.MLI.PARAMS+3+S.FIEX.ACL

				>MLICALL MLIACL
.9				rts

STAT.RET4		inc pStack

STAT.RET3		inc pStack
				inc pStack
				inc pStack
				rts
*/--------------------------------------
* # FStat
* Return information about a hFILE
* ## C
* `int fstat(short int hFILE, struct stat *statbuf);`
* ## ASM
* `>PUSHB hFILE`
* `>PUSHW statbuf`
* `>SYSCALL fstat`
* ## RETURN VALUE
*\--------------------------------------
K.FStat			ldy #2
				jsr PFT.CheckNodeY
				bcs STAT.RET3

				>PULLW K.Stat.Store.2+1
				
				>PULLA
				tax
				lda hFDs.hName-1,x		get path
				jsr K.GetMemPtr
				jsr PFT.YAToMLIPATH

				jsr FS.Stat.203
				bcs STAT.RTS

				ldy #S.FD.REG.REF
				lda (pFD),y
				sta K.MLI.PARAMS+1

				>MLICALL MLIGETEOF
				bcs STAT.RTS
				
				ldx #2

.1				lda K.MLI.PARAMS+2,x
				sta K.S.STAT+S.STAT.SIZE,x
				dex
				bpl .1
				
K.Stat.Store	ldy #S.STAT-1

K.Stat.Store.1	lda K.S.STAT,y
K.Stat.Store.2	sta $ffff,y				SELF MODIFIED
				dey
				bpl K.Stat.Store.1

*				clc
STAT.RTS		rts
*/--------------------------------------
* # Stat
* Return information about a file
* ## C
* `int stat(const char *pathname, struct stat *statbuf);`
* ## ASM
* `>PUSHW pathname`
* `>PUSHW statbuf`
* `>SYSCALL stat`
* ## RETURN VALUE
*\--------------------------------------
K.Stat			jsr PFT.CheckPath2
				bcs STAT.RET4			go discard statbuf

				>PULLW K.Stat.Store.2+1

				inc pStack
				inc pStack

				jsr FS.Stat
				bcc K.Stat.Store

				rts
*/-------------------------------------
* # MKDir
* create a directory
* ## C
* `int mkdir(const char *pathname, int mode);`
* ## ASM
* `>PUSHW pathname`
* `>PUSHW mode`
* `>SYSCALL mkdir`
* ## RETURN VALUE
* CC : success
* CS : error
* A = EC
*\-------------------------------------
K.MKDir			jsr PFT.CheckPath2
				bcs STAT.RET4

				jsr STAT.PM
				
				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 FS.CREATE
*/--------------------------------------
* # MKFIFO
* return a pathname to a new FIFO
* ## C
* `hFILE mkfifo(const char *pathname, int mode);`
* ## ASM
* `>PUSHW pathname`
* `>PUSHW mode`
* `>SYSCALL mkfifo`
* ## RETURN VALUE
* CC = OK, CS = ERROR
* A = hFILE
*\--------------------------------------
K.MKFIFO		jsr STAT.PM

				>LDYAI 512
				jsr K.pipe
				bcs STAT.RTS

				ldy #0

.1				lda UNISTD.DEVFIFO,y
				sta (ZPPtr1),y			fill pathname buffer
				iny
				cpy #9
				bne .1

				lda IO.hFD
				jsr STDIO.A2HexAX
				sta (ZPPtr1),y
				txa
				iny
				sta (ZPPtr1),y
				iny
				lda #0
				sta (ZPPtr1),y

				lda ZPPtr1
				clc
				adc #5					skip /dev/
				sta ZPPtr1
				bcc K.MkNod.I

				inc ZPPtr1+1
				bra K.MkNod.I
*/--------------------------------------
* # MkNod
* Create a special or ordinary file.
* (CDEV, BDEV, DSOCKS, SSOCK, PIPE)
* ## C
* `hFILE mknod(const char *pathname, int mode, hFD fd);`
* ## ASM
* `>PUSHW pathname`
* `>PUSHW mode`
* `>PUSHB fd`
* `>SYSCALL mknod`
* ## RETURN VALUE
* CC = OK, CS = ERROR
* A = hFILE
*\--------------------------------------
K.MkNod 		>PULLB IO.hFD

				jsr STAT.PM
				
K.MkNod.I		lda IO.hFD
				jsr DEV.GetFD
				bcc .2
				
				jsr DEV.GetFreeFD
				bcs .9
				
				lda IO.hFD
				sta hFDs-1,x
				
.2				stx IO.hFILE

				>LDYA ZPPtr1
				>SYSCALL2 StrDup
				bcs .9

				txa

				ldx IO.hFILE
				sta hFDs.hName-1,x		store path

				txa						hFILE
				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

				>SYSCALL2 NewStkObj
				bcs .99

				stx .8+1				save PIPE buffer

				lda #S.FD.T.PIPE
				jsr DEV.MkFD
				bcs .9

.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
				lda IO.hFD
*				clc
				rts

.9				pha						save error code
				lda .8+1				get back PIPE buffer

				>SYSCALL2 FreeStkObj

				pla
				sec
.99				rts
*--------------------------------------
STAT.PM			>PULLW K.S.STAT+S.STAT.MODE
				>PULLW ZPPtr1			pathname
				rts
*--------------------------------------
MAN
SAVE usr/src/sys/kernel.s.stat
LOAD usr/src/sys/kernel.s
ASM