#include <stdio.h>

int main()
{
    FILE *fp;
    char buf[256];

    fp = fopen("dd:TESTDD", "r");
    if (fp == NULL) {
        printf((char *)"fopen read failed\n");
        return 1;
    }

    printf((char *)"Existing content:\n");
    while (fgets(buf, 256, fp) != NULL) {
        printf((char *)"%s", buf);
    }
    fclose(fp);

    printf((char *)"Read complete.\n");
    return 0;
}