mirror of
https://github.com/GnoConsortium/gno.git
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144 lines
1.8 KiB
NASM
144 lines
1.8 KiB
NASM
**************************************************************************
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*
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* The GNO Shell Project
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*
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* Developed by:
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* Jawaid Bazyar
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* Tim Meekins
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*
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**************************************************************************
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*
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* MAIN.ASM
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* By Tim Meekins
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*
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**************************************************************************
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keep o/main
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mcopy m/main.mac
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init START
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jml ~GNO_COMMAND
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END
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MAIN START
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using global
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p equ 0
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arg equ p+4
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space equ arg+4
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subroutine (2:argc,4:argv),space
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kernStatus @a
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bcc ok
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ErrWriteCString #str
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jmp done
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ok stz FastFlag
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stz CmdFlag
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stz ExecFlag
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argloop dec argc
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jeq start
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clc
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lda argv
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adc #4
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sta argv
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ldy #2
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lda [argv]
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sta arg
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lda [argv],y
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sta arg+2
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lda [arg]
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and #$FF
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cmp #'-'
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beq intoption
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; parse remaining args as a command to run
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inc ExecFlag
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inc FastFlag
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ph4 #1024
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jsl ~NEW
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sta ExecCmd
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sta p
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stx ExecCmd+2
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stx p+2
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cmd3 ldy #0
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cmd0 lda [arg],y
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and #$ff
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beq cmd1
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sta [p],y
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iny
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bra cmd0
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cmd1 lda #' '
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sta [p],y
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sec ;inc a
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tya
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adc p
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sta p
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dec argc
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beq cmd2
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clc
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lda argv
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adc #4
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sta argv
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ldy #2
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lda [argv]
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sta arg
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lda [argv],y
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sta arg+2
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bra cmd3
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cmd2 lda #0
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sta [p]
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bra start
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intoption ldy #1
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optloop lda [arg],y
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and #$FF
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beq nextarg
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cmp #'f'
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beq optf
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cmp #'c'
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beq parsec
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showusage ErrWriteCString #usage
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bra done
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optf inc FastFlag
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nextopt iny
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bra optloop
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nextarg cpy #1
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beq showusage
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jmp argloop
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parsec clc
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lda argv
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adc #4
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sta argv
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dec argc
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beq showusage
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inc CmdFlag
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inc FastFlag
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mv4 argv,CmdArgV
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mv2 argc,CmdArgC
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start case on
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jsl shell
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case off
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done return
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str dc h'0d0a0a'
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dc c'Before gsh may be run, the GNO/ME system, or kernel, must be running.'
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dc h'0d0a0a00'
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usage dc c'Usage: gsh [-cf] [argument...]',h'0d0a00'
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END
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