generated by cgit v1.2.3 (git 2.25.1) at 2026-01-21 23:55:45 +0000
 


lass="kt">int i, len, rc = 0;

    if (xsh == NULL) {
	return -1;
    }

    path = xs_get_domain_path(xsh, domid);
    if (path == NULL) {
	fprintf(logfile, "xs_get_domain_path() error. domid %d.\n", domid);
	return -1;
    }

    pasprintf(&buf, "%s/vm", path);
    uuid = xs_read(xsh, XBT_NULL, buf, &len);
    if (uuid == NULL) {
	fprintf(logfile, "xs_read(): uuid get error. %s.\n", buf);
	free(path);
	return -1;
    }

    pasprintf(&buf, "%s/vncpasswd", uuid);
    passwd = xs_read(xsh, XBT_NULL, buf, &len);
    if (passwd == NULL) {
	fprintf(logfile, "xs_read(): vncpasswd get error. %s.\n", buf);
	free(uuid);
	free(path);
	return rc;
    }

    for (i=0; i<len && i<63; i++) {
	vncpasswd[i] = passwd[i];
	passwd[i] = '\0';
    }
    vncpasswd[len] = '\0';
    pasprintf(&buf, "%s/vncpasswd", uuid);
    if (xs_write(xsh, XBT_NULL, buf, passwd, len) == 0) {
	fprintf(logfile, "xs_write() vncpasswd failed.\n");
	rc = -1;
    }

    free(passwd);
    free(uuid);
    free(path);

    return rc;
}


/*
 * get all device instances of a certain type
 */
char **xenstore_domain_get_devices(struct xs_handle *handle,
                                   const char *devtype, unsigned int *num)
{
    char *path;
    char *buf = NULL;
    char **e  = NULL;

    path = xs_get_domain_path(handle, domid);
    if (path == NULL)
        goto out;

    if (pasprintf(&buf, "%s/device/%s", path,devtype) == -1)
	goto out;

    e = xs_directory(handle, XBT_NULL, buf, num);

 out:
    free(path);
    free(buf);
    return e;
}

/*
 * Check whether a domain has devices of the given type
 */
int xenstore_domain_has_devtype(struct xs_handle *handle, const char *devtype)
{
    int rc = 0;
    unsigned int num;
    char **e = xenstore_domain_get_devices(handle, devtype, &num);
    if (e)
        rc = 1;
    free(e);
    return rc;
}

/*
 * Function that creates a path to a variable of an instance of a
 * certain device
 */
static char *get_device_variable_path(const char *devtype, const char *inst,
                                      const char *var)
{
    char *buf = NULL;
    if (pasprintf(&buf, "/local/domain/0/backend/%s/%d/%s/%s",
                  devtype,
                  domid,
                  inst,
                  var) == -1) {
        free(buf);
        buf = NULL;
    }
    return buf;
}

char *xenstore_backend_read_variable(struct xs_handle *handle,
                                     const char *devtype, const char *inst,
                                     const char *var)
{
    char *value = NULL;
    char *buf = NULL;
    unsigned int len;

    buf = get_device_variable_path(devtype, inst, var);
    if (NULL == buf)
	goto out;

    value = xs_read(handle, XBT_NULL, buf, &len);

    free(buf);

out:
    return value;
}

/*
  Read the hotplug status variable from the backend given the type
  of device and its instance.
*/
char *xenstore_read_hotplug_status(struct xs_handle *handle,
                                   const char *devtype, const char *inst)
{
    return xenstore_backend_read_variable(handle, devtype, inst,
                                          "hotplug-status");
}

/*
   Subscribe to the hotplug status of a device given the type of device and
   its instance.
   In case an error occurrs, a negative number is returned.
 */
int xenstore_subscribe_to_hotplug_status(struct xs_handle *handle,
                                         const char *devtype,
                                         const char *inst,
                                         const char *token)
{
    int rc = 0;
    char *path = get_device_variable_path(devtype, inst, "hotplug-status");

    if (path == NULL)
        return -1;

    if (0 == xs_watch(handle, path, token))
        rc = -2;

    free(path);

    return rc;
}

/*
 * Unsubscribe from a subscription to the status of a hotplug variable of
 * a device.
 */
int xenstore_unsubscribe_from_hotplug_status(struct xs_handle *handle,
                                             const char *devtype,
                                             const char *inst,
                                             const char *token)
{
    int rc = 0;
    char *path;
    path = get_device_variable_path(devtype, inst, "hotplug-status");
    if (path == NULL)
        return -1;

    if (0 == xs_unwatch(handle, path, token))
        rc = -2;

    free(path);

    return rc;
}