Webserver Logfile Analyzer

#include <stdio.h>		// io access (filestream, screen)
#include <stdlib.h>		// atoi
#include <string.h>		// strtok
int main(int argc, char* argv[])
{
	printf("\n");
	printf("-------------------------------------------------------------------------------\n");
	printf("Bandwidth Calculator for WWW Logfiles v. 0.03a\n");
	printf("Written by Lucas Moten(krozy@theonlinegamer.com) 2001-04-30\n");
	printf("-------------------------------------------------------------------------------\n");

	//FILE FORMAT: (code utilizes the 11th field)
	//
	//#Fields: date time c-ip cs-username s-ip s-port cs-method cs-uri-stem cs-uri-query sc-status sc-bytes cs-bytes time-taken cs-version cs(User-Agent) cs(Cookie) cs(Referer) 
	//2000-12-01 00:02:09 64.20.169.144 - 64.27.79.90 80 GET /favicon.ico - 200 3228 239 828 HTTP/1.1 Mozilla/4.0+(compatible;+MSIE+5.5;+Windows+98) ASPSESSIONIDGQGQQJCQ=OACMLIMAMCGBPMFAKFGMHAOO -
	int bytes = 0;
	int kbytes = 0;
	int mbytes = 0;
	int linebytes = 0;
	char line[4096];
	int toknum = 0;
	char * token;
	int hits = 0;
	// Open the file supplied in the first command line argument
	// If no filename is supplied, try a default of 'wwwtraffic.log'
	FILE* logfile;
	if(argv[1] != NULL) {
		logfile = fopen(argv[1], "r");
	} else {
		printf("Name of logfile was not supplied, trying 'wwwtraffic.log'\n");
		logfile = fopen("wwwtraffic.log", "r");
	}
	if(logfile == NULL) {
		printf("The file wasn't found.\n");
		return 0;
	}
	// If we have an error opening the file, then bail out.
	if(!(ferror(logfile))) {
		// Continue reading until we reach the end of the file
		while( fgets(line, 4096, logfile) != NULL )
		{	
			// Ignore Comments
			if(line[0] != '#')		
			{
				// Not a comment, increase our hit count. Report the number
				// of hits as "eye-candy", for every 50,000 hits so that the
				// user doesnt think the program isn't working
				hits ++;
				if ((hits%50000)==0) printf("Total Hits so far: %i\n", hits); //status
				// Reset information for this line
				toknum = 0;
				linebytes = 0;
				// Prep the String Tokenizer. Note that this would return
				// the first 'token'. A token is deliminated by the 2nd parameter
				strtok(line, " ");
				// bleed off 9 more 'tokens'.
				for(toknum = 0; toknum < 9; toknum ++) strtok(NULL, " ");
				// We've reached the 11th token, this is the one we want, so capture it
				token = strtok(NULL, " ");
				// Make sure the token is valid, and if so, set the amount of bytes
				if (token != NULL) linebytes = atoi(token);
				// Add the bytes and perform conversions
				bytes = bytes + linebytes;
				if(bytes > 1024) {
					kbytes ++;
					bytes -= 1024;
					if(kbytes > 1024) {
						mbytes ++;
						kbytes -= 1024;
					}
				}
			}
		}
		// Done with the file, close it out
		fclose(logfile);	
	} else {
		// Report the fact that there was an error
		printf("error opening file!\n");
	}
	// Show bandwidth + total hit results. Not that in terms of bandwidth,
	// we're showing whatever the largest type was. - easily convertible to
	// include gigabytes, terrabytes, etc. as this becomes necessary in the
	// future.
	if(mbytes)
	{
		printf("Bandwidth in Megabytes: %i\n", mbytes);
	} else {
		if(kbytes)
		{
			printf("Bandwidth in Kilobytes: %i\n", kbytes);
		} else {
			printf("Bandwidth in Bytes: %i\n", bytes);
		}
	}
	printf("Total Hits: %i\n", hits);
	return 0;
}
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