static int gp_port_usbdiskdirect_seek (GPPort *port, int offset, int whence)
{
off_t ret;
C_PARAMS (!port);
/* The device needs to be opened for that operation */
if (port->pl->fd == -1)
CHECK (gp_port_usbdiskdirect_open (port))
ret = lseek (port->pl->fd, offset, whence);
if (ret == -1) {
gp_port_set_error (port, _("Could not seek to offset: %x on "
"'%s' (%m)."), offset,
port->settings.usbdiskdirect.path);
return GP_ERROR_IO;
}
return ret;
}
static int
gp_port_usbdiskdirect_read (GPPort *port, char *bytes, int size)
{
int ret;
C_PARAMS (port);
/* The device needs to be opened for that operation */
if (port->pl->fd == -1)
CHECK (gp_port_usbdiskdirect_open (port))
ret = read (port->pl->fd, bytes, size);
if (ret < 0) {
gp_port_set_error (port, _("Could not read from '%s' (%m)."),
port->settings.usbdiskdirect.path);
return GP_ERROR_IO;
}
return ret;
}
static int
gp_port_usbdiskdirect_write (GPPort *port, const char *bytes, int size)
{
int ret;
if (!port)
return GP_ERROR_BAD_PARAMETERS;
/* The device needs to be opened for that operation */
if (port->pl->fd == -1)
CHECK (gp_port_usbdiskdirect_open (port))
ret = write (port->pl->fd, bytes, size);
if (ret < 0) {
gp_port_set_error (port, _("Could not write to '%s' (%m)."),
port->settings.usbdiskdirect.path);
return GP_ERROR_IO;
}
return ret;
}
