#include <stdio.h>
 
int main(int argc, char *argv[]){
   if(argc < 2){
        fprintf(stderr, "Usage %s filename\n", argv[0]);
        return 1;
    }

    //int fd = open(argv[1], O_RDONLY);
    FILE *f = fopen(argv[1], "r");
     
    if (f == NULL) {
        fprintf(stderr,"Could not open file %s: ",argv[1]);
        perror("");
        return 1;
    }

    int byte;
    while ((byte = fgetc(f)) != EOF){
        printf("%c", byte);
    }
   
    fclose(f);
    return 0;
}