makeimage.cpp
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makeimage.cpp
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	/*
	* makeimage.cpp:
	*
	* Make an image with a given number of sectors.
	* This file is a work of a US government employee and as such is in the Public domain.
	* Simson L. Garfinkel, March 12, 2012
	*/

	#include <stdio.h>
	#include <stdlib.h>
	#include <string.h>
	#include <err.h>

	const char *progname = "makeimage";

	void usage()
	{
	errx(1,"usage: %s file blockcount\n",progname);
	}

	int main(int argc,char **argv)
	{
	if(argc!=3) usage();

	int count = atoi(argv[2]);
	char buf[512];

	FILE *out = fopen(argv[1],"wb");
	if(!out) err(1,"fopen(%s)",argv[1]);

	memset(buf,' ',sizeof(buf));
	buf[511] = '\000';
	for(int i=0;i<count;i++){
	sprintf(buf,"Block %d\n",i);
	fwrite(buf,sizeof(buf),1,out);
	}
	fclose(out);
	}