/*

	Author:		Markus Diersbock

	Purpose:	Peek into large files. Similar to UNIX head command
				if found.

	Created:	2001/11/10

	Notes:		

*/

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

// Functions

int main(int argc, char *argv[]) {

	char infilename[257];
	char readline[1001];
	int nolinestoread;
	FILE *infile;
	int loop;

	if (argc != 3) {
		printf("\n Usage: peek <file> <number of lines to read>\n\n");
		return -1;
	}

	strcpy(infilename, argv[1]);
	nolinestoread=atoi(argv[2]);

	if (nolinestoread < 1) {
		printf("\nLines must be 1 or greater.\n");
		return -1;
	}

	if ((infile = fopen(infilename,"r"))==NULL) {
		printf("\nError opening file(s)!\n\n");
		return -1;
	}

	for (loop= 0 ;(!feof(infile)) && (loop <= nolinestoread); loop++) {
		fgets(readline,sizeof(readline),infile);
		printf(readline);
	}


	if (fclose(infile)==-1) {
		printf("\nError closing file(s)!\n\n");
		return -1;
	}

	return 0;
}