file open, struct test1

struct_task1.c

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

struct data_struct{
	char filename[512];
	char data_buffer[1024];
};


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

	struct data_struct ds;

	if( argc < 2 ){
		fprintf(stderr, "Usage : %s [target file]\n", argv[0]);
		return -1;
	}

	int fd = open(argv[1], O_RDONLY);
	if( fd < 0 ){
		perror("open ");
		return -1;
	}

	memcpy(ds.filename, argv[1], strlen(argv[1]));
	printf("Filename : %s\n", ds.filename);

	while(read(fd, ds.data_buffer, 1024) > 0){
		printf("%s\n", ds.data_buffer);
		memset(ds.data_buffer, 0, 1024);
	}
	return 0;
}