gistfile1.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>

int main(int argc, char** argv) {
    FILE *file, * filetest;
    char *buffer, *filename;
    long length;

    file = fopen(argv[1], "r");
    if(file == NULL) {
        perror("File could not be opened");
        exit(1);
    }
    fseek(file,0,SEEK_END);
    length = ftell(file);
    fseek(file,0,SEEK_SET);

    buffer = malloc(length);
    if(buffer == NULL) {
        perror("Error allocating memory");
        exit(1);
    }
    int i = fread(buffer, length, sizeof(char), file);

    printf("fread %ld length %ld, i %d", strlen(buffer), length, i);
    fclose(file);
}