#include <stdio.h>
#include <sys/stat.h>
#include <unistd.h>

#define PROGRAM_NAME "cat"

struct stat statbuf;

int main(int argc, char* argv[]) {
	FILE *fileptr = NULL;
	char buf[8192];
	char ch;
	
	if (argc < 2) {
		while (fgets(buf, sizeof(buf), stdin) != NULL) {
			printf("%s", buf);
		}

		return 0;
	}
	
	if (access(argv[1], F_OK) != 0) {
		printf("%s: %s: No such file or directory.\n", PROGRAM_NAME, argv[1]);
		return 1;
	}
		
	if (stat(argv[1], &statbuf) == 0 && S_ISDIR(statbuf.st_mode)) {
		printf("%s: %s is a directory.\n", PROGRAM_NAME, argv[1]);
		return 1;
	}

	fileptr = fopen(argv[1], "r");

	if (fileptr == NULL){
		perror("cat");
		return 1;
	}

	while ((ch = fgetc(fileptr)) != EOF) {
		putchar(ch);
	}

	fclose(fileptr);
	return 0;
}