[mirror_smartmontools-debian.git] / dev_interface.cpp

/*
 * dev_interface.cpp
 *
 * Home page of code is: http://smartmontools.sourceforge.net
 *
 * Copyright (C) 2008-12 Christian Franke <smartmontools-support@lists.sourceforge.net>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * You should have received a copy of the GNU General Public License
 * (for example COPYING); If not, see <http://www.gnu.org/licenses/>.
 *
 */

#include "config.h"
#include "int64.h"
#include "dev_interface.h"
#include "dev_tunnelled.h"
#include "utility.h"

#include <errno.h>
#include <stdarg.h>
#include <stdexcept>

#if defined(HAVE_GETTIMEOFDAY)
#include <sys/time.h>
#elif defined(HAVE_FTIME)
#include <sys/timeb.h>
#endif

const char * dev_interface_cpp_cvsid = "$Id: dev_interface.cpp 3524 2012-03-21 22:19:31Z chrfranke $"
  DEV_INTERFACE_H_CVSID;

/////////////////////////////////////////////////////////////////////////////
// smart_device

smart_device::smart_device(smart_interface * intf, const char * dev_name,
    const char * dev_type, const char * req_type)
: m_intf(intf), m_info(dev_name, dev_type, req_type),
  m_ata_ptr(0), m_scsi_ptr(0)
{
}

smart_device::smart_device(do_not_use_in_implementation_classes)
: m_intf(0), m_ata_ptr(0), m_scsi_ptr(0)
{
  throw std::logic_error("smart_device: wrong constructor called in implementation class");
}

smart_device::~smart_device() throw()
{
}

bool smart_device::set_err(int no, const char * msg, ...)
{
  if (!msg)
    return set_err(no);
  m_err.no = no;
  va_list ap; va_start(ap, msg);
  m_err.msg = vstrprintf(msg, ap);
  va_end(ap);
  return false;
}

bool smart_device::set_err(int no)
{
  return smi()->set_err_var(&m_err, no);
}

smart_device * smart_device::autodetect_open()
{
  open();
  return this;
}

bool smart_device::owns(const smart_device * /*dev*/) const
{
  return false;
}

void smart_device::release(const smart_device * /*dev*/)
{
}


/////////////////////////////////////////////////////////////////////////////
// ata_device

ata_in_regs_48bit::ata_in_regs_48bit()
: features_16(features, prev.features),
  sector_count_16(sector_count, prev.sector_count),
  lba_low_16(lba_low, prev.lba_low),
  lba_mid_16(lba_mid, prev.lba_mid),
  lba_high_16(lba_high, prev.lba_high),
  lba_48(     lba_low,      lba_mid,      lba_high,
         prev.lba_low, prev.lba_mid, prev.lba_high)
{
}

ata_out_regs_48bit::ata_out_regs_48bit()
: sector_count_16(sector_count, prev.sector_count),
  lba_low_16(lba_low, prev.lba_low),
  lba_mid_16(lba_mid, prev.lba_mid),
  lba_high_16(lba_high, prev.lba_high),
  lba_48(     lba_low,      lba_mid,      lba_high,
         prev.lba_low, prev.lba_mid, prev.lba_high)
{
}

ata_cmd_in::ata_cmd_in()
: direction(no_data),
  buffer(0),
  size(0)
{
}

ata_cmd_out::ata_cmd_out()
{
}

bool ata_device::ata_pass_through(const ata_cmd_in & in)
{
  ata_cmd_out dummy;
  return ata_pass_through(in, dummy);
}

bool ata_device::ata_cmd_is_ok(const ata_cmd_in & in,
  bool data_out_support /*= false*/,
  bool multi_sector_support /*= false*/,
  bool ata_48bit_support /*= false*/)
{
  // Check DATA IN/OUT
  switch (in.direction) {
    case ata_cmd_in::no_data:  break;
    case ata_cmd_in::data_in:  break;
    case ata_cmd_in::data_out: break;
    default:
      return set_err(EINVAL, "Invalid data direction %d", (int)in.direction);
  }

  // Check buffer size
  if (in.direction == ata_cmd_in::no_data) {
    if (in.size)
      return set_err(EINVAL, "Buffer size %u > 0 for NO DATA command", in.size);
  }
  else {
    if (!in.buffer)
      return set_err(EINVAL, "Buffer not set for DATA IN/OUT command");
    unsigned count = (in.in_regs.prev.sector_count<<16)|in.in_regs.sector_count;
    // TODO: Add check for sector count == 0
    if (count * 512 != in.size)
      return set_err(EINVAL, "Sector count %u does not match buffer size %u", count, in.size);
  }

  // Check features
  if (in.direction == ata_cmd_in::data_out && !data_out_support)
    return set_err(ENOSYS, "DATA OUT ATA commands not supported");
  if (!(in.size == 0 || in.size == 512) && !multi_sector_support)
    return set_err(ENOSYS, "Multi-sector ATA commands not supported");
  if (in.in_regs.is_48bit_cmd() && !ata_48bit_support)
    return set_err(ENOSYS, "48-bit ATA commands not supported");
  return true;
}

bool ata_device::ata_identify_is_cached() const
{
  return false;
}


/////////////////////////////////////////////////////////////////////////////
// tunnelled_device_base

tunnelled_device_base::tunnelled_device_base(smart_device * tunnel_dev)
: smart_device(never_called),
  m_tunnel_base_dev(tunnel_dev)
{
}

tunnelled_device_base::~tunnelled_device_base() throw()
{
  delete m_tunnel_base_dev;
}

bool tunnelled_device_base::is_open() const
{
  return (m_tunnel_base_dev && m_tunnel_base_dev->is_open());
}

bool tunnelled_device_base::open()
{
  if (!m_tunnel_base_dev)
    return set_err(ENOSYS);
  if (!m_tunnel_base_dev->open())
    return set_err(m_tunnel_base_dev->get_err());
  return true;
}

bool tunnelled_device_base::close()
{
  if (!m_tunnel_base_dev)
    return true;
  if (!m_tunnel_base_dev->close())
    return set_err(m_tunnel_base_dev->get_err());
  return true;
}

bool tunnelled_device_base::owns(const smart_device * dev) const
{
  return (m_tunnel_base_dev && (m_tunnel_base_dev == dev));
}

void tunnelled_device_base::release(const smart_device * dev)
{
  if (m_tunnel_base_dev == dev)
    m_tunnel_base_dev = 0;
}


/////////////////////////////////////////////////////////////////////////////
// smart_interface

// Pointer to (usually singleton) interface object returned by ::smi()
smart_interface * smart_interface::s_instance;

std::string smart_interface::get_os_version_str()
{
  return SMARTMONTOOLS_BUILD_HOST;
}

std::string smart_interface::get_valid_dev_types_str()
{
  // default
  std::string s =
    "ata, scsi, sat[,auto][,N][+TYPE], usbcypress[,X], usbjmicron[,x][,N], usbsunplus";
  // append custom
  std::string s2 = get_valid_custom_dev_types_str();
  if (!s2.empty()) {
    s += ", "; s += s2;
  }
  return s;
}

std::string smart_interface::get_app_examples(const char * /*appname*/)
{
  return "";
}

int64_t smart_interface::get_timer_usec()
{
#if defined(HAVE_GETTIMEOFDAY)
 #if defined(HAVE_CLOCK_GETTIME) && defined(CLOCK_MONOTONIC)
  {
    static bool have_clock_monotonic = true;
    if (have_clock_monotonic) {
      struct timespec ts;
      if (!clock_gettime(CLOCK_MONOTONIC, &ts))
        return ts.tv_sec * 1000000LL + ts.tv_nsec/1000;
      have_clock_monotonic = false;
    }
  }
 #endif
  {
    struct timeval tv;
    gettimeofday(&tv, 0);
    return tv.tv_sec * 1000000LL + tv.tv_usec;
  }
#elif defined(HAVE_FTIME)
  {
    struct timeb tb;
    ftime(&tb);
    return tb.time * 1000000LL + tb.millitm * 1000;
  }
#else
  return -1;
#endif
}

bool smart_interface::disable_system_auto_standby(bool /*disable*/)
{
  return set_err(ENOSYS);
}

bool smart_interface::set_err(int no, const char * msg, ...)
{
  if (!msg)
    return set_err(no);
  m_err.no = no;
  va_list ap; va_start(ap, msg);
  m_err.msg = vstrprintf(msg, ap);
  va_end(ap);
  return false;
}

bool smart_interface::set_err(int no)
{
  return set_err_var(&m_err, no);
}

bool smart_interface::set_err_var(smart_device::error_info * err, int no)
{
  err->no = no;
  err->msg = get_msg_for_errno(no);
  if (err->msg.empty() && no != 0)
    err->msg = strprintf("Unknown error %d", no);
  return false;
}

const char * smart_interface::get_msg_for_errno(int no)
{
  return strerror(no);
}


/////////////////////////////////////////////////////////////////////////////
// Default device factory

smart_device * smart_interface::get_smart_device(const char * name, const char * type)
{
  clear_err();

  // Call platform specific autodetection if no device type specified
  smart_device * dev;
  if (!type || !*type) {
    dev = autodetect_smart_device(name);
    if (!dev && !get_errno())
      set_err(EINVAL, "Unable to detect device type");
    return dev;
  }

  // First check for platform specific device types
  dev = get_custom_smart_device(name, type);
  if (dev || get_errno())
    return dev;

  if (!strcmp(type, "ata"))
    dev = get_ata_device(name, type);
  else if (!strcmp(type, "scsi"))
    dev = get_scsi_device(name, type);

  else if (  ((!strncmp(type, "sat", 3) && (!type[3] || strchr(",+", type[3])))
           || (!strncmp(type, "usb", 3)))) {
    // Split "sat...+base..." -> ("sat...", "base...")
    unsigned satlen = strcspn(type, "+");
    std::string sattype(type, satlen);
    const char * basetype = (type[satlen] ? type+satlen+1 : "");
    // Recurse to allocate base device, default is standard SCSI
    if (!*basetype)
      basetype = "scsi";
    smart_device_auto_ptr basedev( get_smart_device(name, basetype) );
    if (!basedev) {
      set_err(EINVAL, "Type '%s+...': %s", sattype.c_str(), get_errmsg());
      return 0;
    }
    // Result must be SCSI
    if (!basedev->is_scsi()) {
      set_err(EINVAL, "Type '%s+...': Device type '%s' is not SCSI", sattype.c_str(), basetype);
      return 0;
    }
    // Attach SAT tunnel
    ata_device * satdev = get_sat_device(sattype.c_str(), basedev->to_scsi());
    if (!satdev)
      return 0;
    basedev.release();
    return satdev;
  }

  else {
    set_err(EINVAL, "Unknown device type '%s'", type);
    return 0;
  }
  if (!dev && !get_errno())
    set_err(EINVAL, "Not a device of type '%s'", type);
  return dev;
}

smart_device * smart_interface::get_custom_smart_device(const char * /*name*/, const char * /*type*/)
{
  return 0;
}

std::string smart_interface::get_valid_custom_dev_types_str()
{
  return "";
}
Commit	Line	Data
2127e193 GI	1	/*
	2	* dev_interface.cpp
	3	*
	4	* Home page of code is: http://smartmontools.sourceforge.net
	5	*
d008864d	6	* Copyright (C) 2008-12 Christian Franke <smartmontools-support@lists.sourceforge.net>
2127e193 GI	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation; either version 2, or (at your option)
	11	* any later version.
	12	*
	13	* You should have received a copy of the GNU General Public License
	14	* (for example COPYING); If not, see <http://www.gnu.org/licenses/>.
	15	*
	16	*/
	17
	18	#include "config.h"
	19	#include "int64.h"
2127e193 GI	20	#include "dev_interface.h"
	21	#include "dev_tunnelled.h"
	22	#include "utility.h"
	23
cfbba5b9 GI	24	#include <errno.h>
cfbba5b9 GI	25	#include <stdarg.h>
2127e193 GI	26	#include <stdexcept>
2127e193 GI	27
e165493d GI	28	#if defined(HAVE_GETTIMEOFDAY)
	29	#include <sys/time.h>
	30	#elif defined(HAVE_FTIME)
	31	#include <sys/timeb.h>
	32	#endif
	33
	34	const char * dev_interface_cpp_cvsid = "$Id: dev_interface.cpp 3524 2012-03-21 22:19:31Z chrfranke $"
2127e193 GI	35	DEV_INTERFACE_H_CVSID;
	36
	37	/////////////////////////////////////////////////////////////////////////////
	38	// smart_device
	39
	40	smart_device::smart_device(smart_interface * intf, const char * dev_name,
	41	const char * dev_type, const char * req_type)
	42	: m_intf(intf), m_info(dev_name, dev_type, req_type),
	43	m_ata_ptr(0), m_scsi_ptr(0)
	44	{
	45	}
	46
	47	smart_device::smart_device(do_not_use_in_implementation_classes)
	48	: m_intf(0), m_ata_ptr(0), m_scsi_ptr(0)
	49	{
	50	throw std::logic_error("smart_device: wrong constructor called in implementation class");
	51	}
	52
	53	smart_device::~smart_device() throw()
	54	{
	55	}
	56
	57	bool smart_device::set_err(int no, const char * msg, ...)
	58	{
	59	if (!msg)
	60	return set_err(no);
	61	m_err.no = no;
	62	va_list ap; va_start(ap, msg);
	63	m_err.msg = vstrprintf(msg, ap);
	64	va_end(ap);
	65	return false;
	66	}
	67
	68	bool smart_device::set_err(int no)
	69	{
d008864d	70	return smi()->set_err_var(&m_err, no);
2127e193 GI	71	}
	72
	73	smart_device * smart_device::autodetect_open()
	74	{
	75	open();
	76	return this;
	77	}
	78
	79	bool smart_device::owns(const smart_device * /dev/) const
	80	{
	81	return false;
	82	}
	83
	84	void smart_device::release(const smart_device * /dev/)
	85	{
	86	}
	87
	88
	89	/////////////////////////////////////////////////////////////////////////////
	90	// ata_device
	91
	92	ata_in_regs_48bit::ata_in_regs_48bit()
	93	: features_16(features, prev.features),
	94	sector_count_16(sector_count, prev.sector_count),
	95	lba_low_16(lba_low, prev.lba_low),
	96	lba_mid_16(lba_mid, prev.lba_mid),
a23d5117 GI	97	lba_high_16(lba_high, prev.lba_high),
	98	lba_48( lba_low, lba_mid, lba_high,
	99	prev.lba_low, prev.lba_mid, prev.lba_high)
2127e193 GI	100	{
	101	}
	102
	103	ata_out_regs_48bit::ata_out_regs_48bit()
	104	: sector_count_16(sector_count, prev.sector_count),
	105	lba_low_16(lba_low, prev.lba_low),
	106	lba_mid_16(lba_mid, prev.lba_mid),
a23d5117 GI	107	lba_high_16(lba_high, prev.lba_high),
	108	lba_48( lba_low, lba_mid, lba_high,
	109	prev.lba_low, prev.lba_mid, prev.lba_high)
2127e193 GI	110	{
	111	}
	112
	113	ata_cmd_in::ata_cmd_in()
	114	: direction(no_data),
	115	buffer(0),
	116	size(0)
	117	{
	118	}
	119
	120	ata_cmd_out::ata_cmd_out()
	121	{
	122	}
	123
	124	bool ata_device::ata_pass_through(const ata_cmd_in & in)
	125	{
	126	ata_cmd_out dummy;
	127	return ata_pass_through(in, dummy);
	128	}
	129
	130	bool ata_device::ata_cmd_is_ok(const ata_cmd_in & in,
	131	bool data_out_support /= false/,
	132	bool multi_sector_support /= false/,
	133	bool ata_48bit_support /= false/)
	134	{
	135	// Check DATA IN/OUT
	136	switch (in.direction) {
	137	case ata_cmd_in::no_data: break;
	138	case ata_cmd_in::data_in: break;
	139	case ata_cmd_in::data_out: break;
	140	default:
	141	return set_err(EINVAL, "Invalid data direction %d", (int)in.direction);
	142	}
	143
	144	// Check buffer size
	145	if (in.direction == ata_cmd_in::no_data) {
	146	if (in.size)
	147	return set_err(EINVAL, "Buffer size %u > 0 for NO DATA command", in.size);
	148	}
	149	else {
	150	if (!in.buffer)
	151	return set_err(EINVAL, "Buffer not set for DATA IN/OUT command");
	152	unsigned count = (in.in_regs.prev.sector_count<<16)\|in.in_regs.sector_count;
	153	// TODO: Add check for sector count == 0
	154	if (count * 512 != in.size)
	155	return set_err(EINVAL, "Sector count %u does not match buffer size %u", count, in.size);
	156	}
	157
	158	// Check features
	159	if (in.direction == ata_cmd_in::data_out && !data_out_support)
	160	return set_err(ENOSYS, "DATA OUT ATA commands not supported");
	161	if (!(in.size == 0 \|\| in.size == 512) && !multi_sector_support)
	162	return set_err(ENOSYS, "Multi-sector ATA commands not supported");
	163	if (in.in_regs.is_48bit_cmd() && !ata_48bit_support)
	164	return set_err(ENOSYS, "48-bit ATA commands not supported");
	165	return true;
	166	}
	167
	168	bool ata_device::ata_identify_is_cached() const
	169	{
	170	return false;
	171	}
	172
	173
174	/////////////////////////////////////////////////////////////////////////////
175	// tunnelled_device_base
176
177	tunnelled_device_base::tunnelled_device_base(smart_device * tunnel_dev)
178	: smart_device(never_called),
179	m_tunnel_base_dev(tunnel_dev)
180	{
181	}
182
183	tunnelled_device_base::~tunnelled_device_base() throw()
184	{
185	delete m_tunnel_base_dev;
186	}
187
188	bool tunnelled_device_base::is_open() const
189	{
190	return (m_tunnel_base_dev && m_tunnel_base_dev->is_open());
191	}
192
193	bool tunnelled_device_base::open()
194	{
195	if (!m_tunnel_base_dev)
196	return set_err(ENOSYS);
197	if (!m_tunnel_base_dev->open())
198	return set_err(m_tunnel_base_dev->get_err());
199	return true;
200	}
201
202	bool tunnelled_device_base::close()
203	{
204	if (!m_tunnel_base_dev)
205	return true;
206	if (!m_tunnel_base_dev->close())
207	return set_err(m_tunnel_base_dev->get_err());
208	return true;
209	}
210
211	bool tunnelled_device_base::owns(const smart_device * dev) const
212	{
213	return (m_tunnel_base_dev && (m_tunnel_base_dev == dev));
214	}
215
216	void tunnelled_device_base::release(const smart_device * dev)
217	{
218	if (m_tunnel_base_dev == dev)
219	m_tunnel_base_dev = 0;
220	}
221
222
223	/////////////////////////////////////////////////////////////////////////////
224	// smart_interface
225
226	// Pointer to (usually singleton) interface object returned by ::smi()
227	smart_interface * smart_interface::s_instance;
228
54965743	229	std::string smart_interface::get_os_version_str()
2127e193 GI	230	{
	231	return SMARTMONTOOLS_BUILD_HOST;
	232	}
	233
54965743	234	std::string smart_interface::get_valid_dev_types_str()
2127e193	235	{
2127e193	236	// default
54965743	237	std::string s =
d008864d	238	"ata, scsi, sat[,auto][,N][+TYPE], usbcypress[,X], usbjmicron[,x][,N], usbsunplus";
2127e193	239	// append custom
54965743 GI	240	std::string s2 = get_valid_custom_dev_types_str();
	241	if (!s2.empty()) {
	242	s += ", "; s += s2;
	243	}
	244	return s;
2127e193 GI	245	}
2127e193 GI	246
54965743	247	std::string smart_interface::get_app_examples(const char * /appname/)
2127e193	248	{
54965743	249	return "";
2127e193 GI	250	}
2127e193 GI	251
e165493d GI	252	int64_t smart_interface::get_timer_usec()
	253	{
	254	#if defined(HAVE_GETTIMEOFDAY)
	255	#if defined(HAVE_CLOCK_GETTIME) && defined(CLOCK_MONOTONIC)
	256	{
	257	static bool have_clock_monotonic = true;
	258	if (have_clock_monotonic) {
	259	struct timespec ts;
	260	if (!clock_gettime(CLOCK_MONOTONIC, &ts))
	261	return ts.tv_sec * 1000000LL + ts.tv_nsec/1000;
	262	have_clock_monotonic = false;
	263	}
	264	}
	265	#endif
	266	{
	267	struct timeval tv;
	268	gettimeofday(&tv, 0);
	269	return tv.tv_sec * 1000000LL + tv.tv_usec;
	270	}
	271	#elif defined(HAVE_FTIME)
	272	{
	273	struct timeb tb;
	274	ftime(&tb);
	275	return tb.time * 1000000LL + tb.millitm * 1000;
	276	}
	277	#else
	278	return -1;
	279	#endif
	280	}
	281
d008864d	282	bool smart_interface::disable_system_auto_standby(bool /disable/)
2127e193	283	{
d008864d GI	284	return set_err(ENOSYS);
	285	}
	286
	287	bool smart_interface::set_err(int no, const char * msg, ...)
	288	{
	289	if (!msg)
	290	return set_err(no);
2127e193 GI	291	m_err.no = no;
	292	va_list ap; va_start(ap, msg);
	293	m_err.msg = vstrprintf(msg, ap);
	294	va_end(ap);
d008864d	295	return false;
2127e193 GI	296	}
2127e193 GI	297
d008864d	298	bool smart_interface::set_err(int no)
2127e193	299	{
d008864d	300	return set_err_var(&m_err, no);
2127e193 GI	301	}
2127e193 GI	302
d008864d	303	bool smart_interface::set_err_var(smart_device::error_info * err, int no)
2127e193 GI	304	{
	305	err->no = no;
	306	err->msg = get_msg_for_errno(no);
	307	if (err->msg.empty() && no != 0)
	308	err->msg = strprintf("Unknown error %d", no);
d008864d	309	return false;
2127e193 GI	310	}
	311
	312	const char * smart_interface::get_msg_for_errno(int no)
	313	{
	314	return strerror(no);
	315	}
	316
	317
	318	/////////////////////////////////////////////////////////////////////////////
	319	// Default device factory
	320
	321	smart_device * smart_interface::get_smart_device(const char * name, const char * type)
	322	{
	323	clear_err();
cfbba5b9 GI	324
	325	// Call platform specific autodetection if no device type specified
	326	smart_device * dev;
2127e193	327	if (!type \|\| !*type) {
cfbba5b9	328	dev = autodetect_smart_device(name);
2127e193 GI	329	if (!dev && !get_errno())
	330	set_err(EINVAL, "Unable to detect device type");
	331	return dev;
	332	}
	333
cfbba5b9 GI	334	// First check for platform specific device types
cfbba5b9 GI	335	dev = get_custom_smart_device(name, type);
2127e193 GI	336	if (dev \|\| get_errno())
	337	return dev;
	338
	339	if (!strcmp(type, "ata"))
	340	dev = get_ata_device(name, type);
	341	else if (!strcmp(type, "scsi"))
	342	dev = get_scsi_device(name, type);
	343
	344	else if ( ((!strncmp(type, "sat", 3) && (!type[3] \|\| strchr(",+", type[3])))
	345	\|\| (!strncmp(type, "usb", 3)))) {
	346	// Split "sat...+base..." -> ("sat...", "base...")
	347	unsigned satlen = strcspn(type, "+");
	348	std::string sattype(type, satlen);
	349	const char * basetype = (type[satlen] ? type+satlen+1 : "");
	350	// Recurse to allocate base device, default is standard SCSI
	351	if (!*basetype)
	352	basetype = "scsi";
bed94269 GI	353	smart_device_auto_ptr basedev( get_smart_device(name, basetype) );
bed94269 GI	354	if (!basedev) {
2127e193 GI	355	set_err(EINVAL, "Type '%s+...': %s", sattype.c_str(), get_errmsg());
	356	return 0;
	357	}
	358	// Result must be SCSI
bed94269	359	if (!basedev->is_scsi()) {
2127e193 GI	360	set_err(EINVAL, "Type '%s+...': Device type '%s' is not SCSI", sattype.c_str(), basetype);
	361	return 0;
	362	}
	363	// Attach SAT tunnel
bed94269 GI	364	ata_device * satdev = get_sat_device(sattype.c_str(), basedev->to_scsi());
	365	if (!satdev)
	366	return 0;
	367	basedev.release();
	368	return satdev;
2127e193 GI	369	}
	370
	371	else {
	372	set_err(EINVAL, "Unknown device type '%s'", type);
	373	return 0;
	374	}
	375	if (!dev && !get_errno())
	376	set_err(EINVAL, "Not a device of type '%s'", type);
	377	return dev;
	378	}
	379
	380	smart_device * smart_interface::get_custom_smart_device(const char * /name/, const char * /type/)
	381	{
	382	return 0;
	383	}
	384
54965743	385	std::string smart_interface::get_valid_custom_dev_types_str()
2127e193	386	{
54965743	387	return "";
2127e193	388	}