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95 lines
4.6 KiB
Plaintext
95 lines
4.6 KiB
Plaintext
Installation:
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If you want to run the compiler inside a virtual machine for more security,
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these scripts are designed to work with qemu 0.11.1. This is required in
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order to use PBot's trigger.
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In addition, you can use the provided 'cc' script to use your local compiler tools
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without installing qemu. No PBot installation or configuration is required in this case.
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To use the local non-vm 'cc' script, you will need to have gcc, gdb and astyle installed locally.
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Be aware that you need to single-quote or escape the code if you use the local 'cc' within a shell,
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e.g.: ./cc $'char s[] = "hello, world"; puts(s); if(s[0] == \'h\') puts("true");'
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WARNING: Using the local 'cc' script outside of the virtual machine will not use qemu at all;
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it will affect local system -- compile "safe" code!
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Virtual machine installation:
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You will need to download qemu and set up a virtual machine containing a system
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with a compiler and, optionally, sensible ulimits/fork-preventation/other security.
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1) copy compiler_vm_server.pl and compiler_watchdog.pl to the virtual machine.
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2) then start up the compiler_vm_server.pl script inside the virtual machine
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3) then connect to qemu's monitor and issue the 'savevm 1' command to save the virtual state
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(After compiles, this state will be loaded via 'loadvm 1' to reset everything within the machine
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for a clean and working environment for subsequent compiles.)
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Now the virtual machine state 1 is saved in a state where it is listening for incoming code. You can
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go ahead and quit qemu without shutting down the guest operating sytem.
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Starting the virtual machine for PBot:
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Now that the virtual machine is configured and saved, you may launch the local server to listen for
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code from PBot to send to the virtual machine's server. To do so, run the compiler_server.pl script.
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Dependencies:
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gcc
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gdb
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astyle
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ulimit -c 50000 (required to produce core files if you wish to have gdb debugger output)
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Files:
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(Read within each file for configuration instructions.)
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- cc: Allows you to use the compiler locally with or without qemu installed.
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Can be used within virtual machine for testing.
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Requires only compiler_vm_client.pl, compiler_vm_server.pl and compiler_watchdog.pl.
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Must have gcc, gdb and astyle installed locally if not used within virtual machine.
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WARNING: If not used within virtual machine will not use qemu at all and will
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affect local system -- compile "safe" code!
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- compiler_client.pl: Main entry point for compiling snippets. Sends over TCP to
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compiler_server.pl. This file can be run be run from the
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client machine or anywhere.
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- compiler_server.pl: Responsible for setting up a TCP server to listen for
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incoming compile requests; and launching and resetting
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the virtual machine. Sends to compiler_vm_client.pl.
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Run this file on the server hosting the virtual machine.
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- compiler_vm_client.pl: Responsible for sending snippets to the virtual
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machine. Also expands/translates and formats
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snippets into compilable code (with main function and
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headers), and handles "interactive-editing".
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Sends over TCP to qemu serial port, waits for result,
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then sends result back caller (compiler_server.pl).
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Run this file on the server hosting the virtual machine.
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- compiler_vm_server.pl: Runs on the system inside the virtual machine.
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This script listens for incoming code snippets over
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the virtual machine's serial port.
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Calls compiler_watchdog.pl to monitor its exit signal
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or exit status, then returns result back over serial
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port (to compiler_vm_client.pl).
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- compiler_watchdog.pl: Runs a program and watches its exit signals/status.
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Run within the virtual machine.
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*** The following files are just auxiliary tools to start/connect to qemu, provided
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for convenience only. Perhaps they will be useful during installation/testing:
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- monitor: Connects to qemu monitor (internal console) over TCP.
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- serial: Connects to qemu serial port over TCP.
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- runqemu: Launches qemu with a visible window, but without networking support.
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- runeqmu.net: Launches qemu with a visible window, and with networking support.
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You may load a state previously saved with runqemu and reboot it
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or otherwise reload its networking configuration to gain networking.
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