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https://github.com/GnoConsortium/gno.git
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e586eeefeb
Added additional optional debug code. A version of gsh with the memory checking debug code turned on is available as an exe file. Lock and unlock the hash mutual exclusion key in when disposing of the hash table. Allow five digits rather than four when printing the process number in the ps command. Piping the output of a command into a non-executable file no longer causes gsh to hang.
196 lines
3.4 KiB
NASM
196 lines
3.4 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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* $Id: main.asm,v 1.8 1999/01/14 17:44:25 tribby Exp $
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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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* Modified by Dave Tribby for GNO 2.0.6
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*
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* Startup portion of shell
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*
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* Note: text set up for tabs at col 16, 22, 41, 49, 57, 65
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* | | | | | |
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* ^ ^ ^ ^ ^ ^
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**************************************************************************
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mcopy /obj/gno/bin/gsh/main.mac
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setcom 60
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**************************************************************************
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; Segment for direct-page and stack
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stack data STACK ; ends up in main.root
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kind $12
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; Define direct-page/stack and fill it with question marks it can be
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; examined for how much is used.
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dc 128c'??' ; 256 bytes
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dc 128c'??' ; 512 bytes total
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dc 128c'????' ; 1024 bytes total
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dc 128c'????????' ; 2048 bytes total
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end
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**************************************************************************
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init START
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; Call the code to emulate C program startup:
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; store Accumulator in ~USER_ID, X- and Y- registers as ~COMMANDLINE
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; start up memory manager (~MM_INIT)
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; parse commandline (via ~GNO_PARSEARG) and push argc and arvg on stack
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jml ~GNO_COMMAND
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; Control continues with the entry point "MAIN". When MAIN returns to
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; ~GNO_COMMAND via rtl, it frees argv and argc before doing its own rtl.
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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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; Parse gsh's command-line arguments.
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argloop dec argc Decrement argument count.
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jeq go_start If none left, ready to start working.
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clc
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lda argv Point to next
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adc #4 argument pointer.
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sta argv
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ldy #2
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lda [argv] Set arg to point to
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sta arg the argument text.
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lda [argv],y
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sta arg+2
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lda [arg] Get first character
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and #$FF of argument.
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cmp #'-' If it's a "-",
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beq intoption handle as an option.
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; Parse remaining args as a command to run (in ExecCmd)
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inc ExecFlag
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inc FastFlag
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ph4 #1024
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~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 #$ff
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beq cmd1
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sta [p],y
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iny
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bra cmd0
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cmd1 lda #' '
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sta [p],y
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sec ;inc a
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tya
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adc p
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sta p
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dec argc
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beq cmd2
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clc
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lda argv
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adc #4
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sta argv
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ldy #2
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lda [argv]
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sta arg
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lda [argv],y
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sta arg+2
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bra cmd3
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cmd2 lda #0
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sta [p]
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go_start bra start
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; Parse an argument as an option (first character is "-")
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intoption ldy #1
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optloop lda [arg],y
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and #$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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; Option is not recognized.
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showusage ErrWriteCString #usage
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bra done
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; Option = "-f": Skip history, gshrc
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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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; Option = "-c": execute shell commands found in file named by next argument
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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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;
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; When preliminary setup is complete, control transfers to here!
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;
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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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