/*
 * the simplest copy ever (does binary too)
 * Usage: scopy fromfile tofile
 * 
 * Matt Bishop, ECS 36A, Fall 2019
 *
 * October 24, 2019
 */
#include <stdio.h>

/*
 * macros
 */
#define BUFFERSIZE	1024

/*
 * the main routine
 */
int main(int argc, char *argv[])
{
	FILE *infp, *outfp;	/* input, output file pointers */
	char buf[BUFFERSIZE];	/* input buffer */
	int nread;		/* number of bytes read */

	/*
	 * open the files
	 */
	/* be sure there are 2 file names! */
	if (argc != 3){
		fprintf(stderr, "Usage: scopy fromfile tofile\n");
		return(1);
	}
	/* open the input and output files and give */
	/* an error message and exit on failure     */
	if ((infp = fopen(argv[1], "r")) == NULL){
		fprintf(stderr, "%s: could not open\n", argv[1]);
		return(1);
	}
	if ((outfp = fopen(argv[2], "w")) == NULL){
		fprintf(stderr, "%s: could not open\n", argv[2]);
		return(1);
	}

	/*
	 * now copy from the source file to the destination file
	 */
	while((nread = fread(buf, sizeof(char), BUFFERSIZE, infp)) != 0)
		if (fwrite(buf, sizeof(char), nread, outfp) != nread){
			fprintf(stderr, "%s: write error; quitting\n", argv[2]);
			return(1);
		}
	if (!feof(infp)){
		fprintf(stderr, "%s: read error; quitting\n", argv[1]);
		return(1);
	}

	/* all done -- close everything up and exit */
	(void) fclose(infp);
	(void) fclose(outfp);
	return(0);
}