#include <errno.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>

int main(int argc, char *argv[])
{
    int ret = EXIT_FAILURE;
    static const char path[] = "myfile.txt";
    FILE *const f = fopen(path, "rb");

    if (!f)
    {
        fprintf(stderr, "%s: fopen(3) %s: %s\n", __func__, path,
            strerror(errno));
        goto end;
    }

    for (;;)
    {
        char c;

        if (fread(&c, sizeof c, 1, f))
            printf("(%#hhx)\n", c);
        else if (ferror(f))
        {
            fprintf(stderr, "%s: ferror\n", __func__);
            goto end;
        }
        else if (feof(f))
            break;
    }

    ret = EXIT_SUCCESS;

end:

    if (f && fclose(f))
    {
        fprintf(stderr, "%s: fclose(3): %s\n", __func__, strerror(errno));
        ret = EXIT_FAILURE;
    }

    return ret;
}