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							|  |  |  | 	BIRD Programmer's Guide: Sysdeps | 
					
						
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							|  |  |  | 	(c) 2000 Martin Mares <mj@ucw.cz> | 
					
						
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							|  |  |  | <chapt>System dependent parts | 
					
						
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							|  |  |  | <sect>Introduction | 
					
						
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							|  |  |  | <p>We've tried to make BIRD as portable as possible, but unfortunately | 
					
						
							|  |  |  | communication with the network stack differs from one OS to another, | 
					
						
							|  |  |  | so we need at least some OS specific code. The good news is that this | 
					
						
							|  |  |  | code is isolated in a small set of modules: | 
					
						
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							|  |  |  | <descrip> | 
					
						
							|  |  |  | <tagp><tt/config.h/</tagp> is a header file with configuration information, | 
					
						
							|  |  |  | definition of the standard set of types and so on. | 
					
						
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										 |  |  | <tagp/Startup module/ controls BIRD startup. Common for a family of OS's (e.g., | 
					
						
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										 |  |  | for all Unices). | 
					
						
							|  |  |  | <tagp/Logging module/ manages the system logs. [per OS family] | 
					
						
							|  |  |  | <tagp/IO module/ gives an implementation of sockets, timers and the | 
					
						
							|  |  |  | global event queue. [per OS family] | 
					
						
							|  |  |  | <tagp/KRT module/ implements the Kernel and Device protocols. This | 
					
						
							|  |  |  | is the most arcane part of the system dependent stuff and some | 
					
						
							|  |  |  | functions differ even between various releases of a single OS. | 
					
						
							|  |  |  | </descrip> |