mirror of
https://github.com/GnoConsortium/gno.git
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402 lines
6.6 KiB
NASM
402 lines
6.6 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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* SHELL.ASM
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* By Tim Meekins
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*
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* This is the main routines for the shell.
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*
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**************************************************************************
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keep o/shell
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mcopy m/shell.mac
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SIGINT gequ 2
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SIGTSTP gequ 18
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SIGCHLD gequ 20
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cmdbuflen gequ 1024
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case on
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shell start
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case off
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using global
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using pdata
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using HistoryData
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using termdata
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p equ 0
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space equ p+4
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subroutine (0:dummy),space
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tsc
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sta cmdcontext
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tdc
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sta cmddp
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* PushVariables 0
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Open ttyopen
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bcc settty
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ErrWriteCString #ttyerr
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jmp quit
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ttyerr dc c'gsh: Failed opening tty.',h'0d00'
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settty mv2 ttyref,gshtty
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tcnewpgrp gshtty
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settpgrp gshtty
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getpid
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sta gshpid
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jsr InitTerm
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lda FastFlag
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bne fastskip1
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lda gshpid ; only print the copyright msg
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cmp #2 ; if not using login
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bne fastskip1
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ldx #^gnostr
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lda #gnostr
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jsr puts
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fastskip1 anop
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signal (#SIGINT,#signal2)
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signal (#SIGTSTP,#signal18)
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signal (#SIGCHLD,#pchild)
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setsystemvector #system
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;
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; Initialize some stuff
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;
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lda FastFlag
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bne fastskip2
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jsr InitHistory
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jsr ReadHistory ;Read in history from disk
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fastskip2 jsr initalias ;initialize alias
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jsr InitDStack ;initialize directory stack
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lda FastFlag
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bne fastskip3
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jsr DoLogin ;Read gshrc
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jsr newline
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fastskip3 anop
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lda didReadTerm
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bne didit
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jsr readterm
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didit jsl hashpath ;hash $path
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lda CmdFlag
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beq cmdskip
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mv4 CmdArgV,p
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ldy #2
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lda [p],y
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pha
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lda [p]
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pha
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ph2 CmdArgc
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pei (p+2)
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pei (p)
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pea 0
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jsl ShellExec
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jmp done1
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cmdskip lda ExecFlag
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beq execskip
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ph4 ExecCmd
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ph2 #0
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jsl Execute
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jmp done1
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execskip anop
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stz lastabort
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gnoloop entry
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phk
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plb
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lda cmdcontext ;dare you to make a mistake
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tcs
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lda cmddp
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tcd
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jsl WritePrompt
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jsr GetCmdLine
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bcs done
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jsr newline
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lda cmdlen
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beq gnoloop
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jsr cursoron
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jsr newlineX
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jsr flush
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ph4 #cmdline
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ph2 #0
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jsl execute
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lda exitamundo
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bne done1
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jsr newlineX
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stz lastabort
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bra gnoloop
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;
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; shut down gsh
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;
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done jsr newline
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jsr newlineX
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done1 ora2 pjoblist,pjoblist+2,@a
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beq done2
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lda lastabort
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bne donekiller
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inc lastabort
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stz exitamundo
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ldx #^stopstr
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lda #stopstr
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jsr puts
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jsr newlineX
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bra gnoloop
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donekiller jsl jobkiller
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done2 lda FastFlag
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bne fastskip5
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jsr SaveHistory
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fastskip5 jsr dispose_hash
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quit PopVariables 0
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Quit QuitParm
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QuitParm dc i'0'
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gnostr dc h'0d',c'GNO/Shell 2.0.4',h'0d'
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dc c'Copyright 1991-1993, Procyon, Inc. & Tim Meekins. '
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dc c'ALL RIGHTS RESERVED',h'0d'
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dc h'0d00'
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stopstr dc c'gsh: There are stopped jobs.',h'0d00'
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ttyopen dc i2'2'
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ttyref dc i2'0'
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dc i4'ttyname'
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ttyname gsstr '.tty'
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exitstr dc c'000000',h'0d00'
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lastabort ds 2
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END
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;=========================================================================
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;
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; Interpret the login file (gshrc).
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; If $HOME is set, we presume the gshrc file is there. If not,
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; or if an error occurs getting the $HOME variable, we use
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; @:gshrc.
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;
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;=========================================================================
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* Appends a C string to the value of the $HOME variable. If $HOME is
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* not set, then it appends the C string to the string '@/'. Returns
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* a pointer to a GC string. Call DisposeHome/AX to deallocate the
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* string.
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DisposeHome START
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dec a
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dec a
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jsl free256
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rtl
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END
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AppendHome START
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outPtr equ 0
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len equ 4
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subroutine (4:str),6
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jsl alloc256
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stx outPtr1+2
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sta outPtr1
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stx outPtr+2
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sta outPtr
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pei (str+2)
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pei (str)
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jsr cstrlen
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sta len
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lda #256
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sta [outPtr]
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GSOS $014B,rvbl ;ReadVariable
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bcs doAtSign
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ldy #2
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lda [outPtr],y
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beq doAtSign ; $HOME not defined?
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clc
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adc #4 ; turn into a cstring
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tay
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short m
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lda #0
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sta [outPtr],y
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long m
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bra doAppend
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doAtSign lda atSign
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ldy #4
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sta [outPtr],y
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lda #1
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ldy #2
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sta [outPtr],y
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doAppend anop
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ldy #0
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short m
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lp lda [outPtr],y
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beq noSep
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cmp #':'
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beq foundSep
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cmp #'/'
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beq foundSep
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iny
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bra lp
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noSep lda #':'
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foundSep sta [str]
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long m
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pei (str+2)
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pei (str)
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pei (outPtr+2)
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lda outPtr
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clc
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adc #4
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pha
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case on
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jsl strcat
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case off
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inc outPtr
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inc outPtr
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lda [outPtr]
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clc
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adc len
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sta [outPtr] ; adjust GS/OS string length
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return 4:outPtr
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atSign dc c'@',i1'0'
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rvbl dc i2'3'
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dc a4'in'
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outPtr1 dc a4'0'
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dc i2'0' ; value of 'Export' flag
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in dosin 'HOME'
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END
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DoLogin START
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ph4 #gshrcName
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jsl AppendHome
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phx ; saved pointer for later
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pha
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phx
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inc a
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inc a ; adjust to the C string
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pha
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lda #0
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pha
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pha
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pha
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pea 0
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jsl shellexec
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pla
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plx
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jsl DisposeHome
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rts
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gshrcName dc c'/gshrc',h'00'
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END
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;=========================================================================
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;
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; GLOBAL data
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;
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;=========================================================================
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global DATA
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ID ds 2
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GSOSDP ds 2
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cmdloc ds 2
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cmdlen ds 2
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cmdline ds cmdbuflen
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buffer ds 256
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wordlen ds 2
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wordpbuf ds 1
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wordbuf ds 256
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nummatch ds 2
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matchbuf ds 512*4
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cmdcontext ds 2
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cmddp ds 2
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gshtty ds 2
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gshpid ds 2
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exitamundo dc i'0' ;!=0 if exit
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signalled dc i'0'
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FastFlag dc i'0'
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CmdFlag dc i'0'
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CmdArgV ds 4
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CmdArgC ds 2
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ExecFlag dc i'0'
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ExecCmd ds 4
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END
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;=========================================================================
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;
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; SIGINT handler when typed at command-line
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;
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;=========================================================================
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signal2 START
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using global
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subroutine (4:fubar),0
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WriteCString #msg
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inc signalled
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; ld2 $80,$E0C000
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return
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msg dc c'^C',h'0d0a00'
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END
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;=========================================================================
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;
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; SIGTSTP handler when typed at command-line
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;
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;=========================================================================
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signal18 START
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using global
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subroutine (4:fubar),0
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WriteCString #msg
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inc signalled
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; ld2 $80,$E0C000
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return
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msg dc c'^Z',h'0d0a00'
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END
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