how to move an imported .db file within xcode directly to an iphone

Question

I want to replace an existing sms.db file in my iphone with a modified sms.db file that has been imported into the xcode project.

I have a function below, cp() that takes "from" and "to" params. I want to execute it like this:

cp('/path/within/xcode/project/sms-modified.db', '/var/mobile/Library/SMS/sms.db');

how can i modify the below function to take the sms.db imported in xcode and replace the sms.db within my phone?

int cp(const char *from, const char *to) {
    int fd_to, fd_from;
    char buf[4096];
    ssize_t nread;
    int saved_errno;

    fd_from = open(from, O_RDONLY);
    if (fd_from < 0)
        return -1;

    fd_to = open(to, O_WRONLY | O_CREAT | O_EXCL, 0666);
    if (fd_to < 0)
        goto out_error;

    while (nread = read(fd_from, buf, sizeof buf), nread > 0)
    {
        char *out_ptr = buf;
        ssize_t nwritten;

        do {
            nwritten = write(fd_to, out_ptr, nread);

            if (nwritten >= 0)
            {
                nread -= nwritten;
                out_ptr += nwritten;
            }
            else if (errno != EINTR)
            {
                goto out_error;
            }
        } while (nread > 0);
    }

    if (nread == 0)
    {
        if (close(fd_to) < 0)
        {
            fd_to = -1;
            goto out_error;
        }
        close(fd_from);

        /* Success! */
        return 0;
    }

    out_error:
    saved_errno = errno;

    close(fd_from);
    if (fd_to >= 0)
        close(fd_to);

    errno = saved_errno;
    return -1;
}

Answer 1

how can i modify the below function to take the sms.db imported in xcode and replace the sms.db within my phone?

You can't. Your iPhone is "sandboxed". It cannot "see" your computer.