[thirdparty/systemd.git] / src / udev / udev-builtin-usb_id.c

/* SPDX-License-Identifier: GPL-2.0+ */
/*
 * USB device properties and persistent device path
 *
 * Copyright (c) 2005 SUSE Linux Products GmbH, Germany
 *   Author: Hannes Reinecke <hare@suse.de>
 */

#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

#include "alloc-util.h"
#include "device-util.h"
#include "fd-util.h"
#include "libudev-util.h"
#include "string-util.h"
#include "strxcpyx.h"
#include "udev-builtin.h"

static void set_usb_iftype(char *to, int if_class_num, size_t len) {
        const char *type = "generic";

        switch (if_class_num) {
        case 1:
                type = "audio";
                break;
        case 2: /* CDC-Control */
                break;
        case 3:
                type = "hid";
                break;
        case 5: /* Physical */
                break;
        case 6:
                type = "media";
                break;
        case 7:
                type = "printer";
                break;
        case 8:
                type = "storage";
                break;
        case 9:
                type = "hub";
                break;
        case 0x0a: /* CDC-Data */
                break;
        case 0x0b: /* Chip/Smart Card */
                break;
        case 0x0d: /* Content Security */
                break;
        case 0x0e:
                type = "video";
                break;
        case 0xdc: /* Diagnostic Device */
                break;
        case 0xe0: /* Wireless Controller */
                break;
        case 0xfe: /* Application-specific */
                break;
        case 0xff: /* Vendor-specific */
                break;
        default:
                break;
        }
        strncpy(to, type, len);
        to[len-1] = '\0';
}

static int set_usb_mass_storage_ifsubtype(char *to, const char *from, size_t len) {
        int type_num = 0;
        char *eptr;
        const char *type = "generic";

        type_num = strtoul(from, &eptr, 0);
        if (eptr != from) {
                switch (type_num) {
                case 1: /* RBC devices */
                        type = "rbc";
                        break;
                case 2:
                        type = "atapi";
                        break;
                case 3:
                        type = "tape";
                        break;
                case 4: /* UFI */
                        type = "floppy";
                        break;
                case 6: /* Transparent SPC-2 devices */
                        type = "scsi";
                        break;
                default:
                        break;
                }
        }
        strscpy(to, len, type);
        return type_num;
}

static void set_scsi_type(char *to, const char *from, size_t len) {
        int type_num;
        char *eptr;
        const char *type = "generic";

        type_num = strtoul(from, &eptr, 0);
        if (eptr != from) {
                switch (type_num) {
                case 0:
                case 0xe:
                        type = "disk";
                        break;
                case 1:
                        type = "tape";
                        break;
                case 4:
                case 7:
                case 0xf:
                        type = "optical";
                        break;
                case 5:
                        type = "cd";
                        break;
                default:
                        break;
                }
        }
        strscpy(to, len, type);
}

#define USB_DT_DEVICE                        0x01
#define USB_DT_INTERFACE                0x04

static int dev_if_packed_info(sd_device *dev, char *ifs_str, size_t len) {
        _cleanup_close_ int fd = -1;
        ssize_t size;
        unsigned char buf[18 + 65535];
        size_t pos = 0;
        unsigned strpos = 0;
        const char *filename, *syspath;
        int r;
        struct usb_interface_descriptor {
                uint8_t bLength;
                uint8_t bDescriptorType;
                uint8_t bInterfaceNumber;
                uint8_t bAlternateSetting;
                uint8_t bNumEndpoints;
                uint8_t bInterfaceClass;
                uint8_t bInterfaceSubClass;
                uint8_t bInterfaceProtocol;
                uint8_t iInterface;
        } _packed_;

        r = sd_device_get_syspath(dev, &syspath);
        if (r < 0)
                return r;

        filename = strjoina(syspath, "/descriptors");
        fd = open(filename, O_RDONLY|O_CLOEXEC);
        if (fd < 0)
                return log_device_debug_errno(dev, errno, "Failed to open \"%s\": %m", filename);

        size = read(fd, buf, sizeof(buf));
        if (size < 18)
                return log_device_warning_errno(dev, SYNTHETIC_ERRNO(EIO),
                                                "Short read from \"%s\"", filename);
        assert((size_t) size <= sizeof buf);

        ifs_str[0] = '\0';
        while (pos + sizeof(struct usb_interface_descriptor) < (size_t) size &&
               strpos + 7 < len - 2) {

                struct usb_interface_descriptor *desc;
                char if_str[8];

                desc = (struct usb_interface_descriptor *) (buf + pos);
                if (desc->bLength < 3)
                        break;
                if (desc->bLength > size - sizeof(struct usb_interface_descriptor))
                        return log_device_debug_errno(dev, SYNTHETIC_ERRNO(EIO),
                                                      "Corrupt data read from \"%s\"", filename);
                pos += desc->bLength;

                if (desc->bDescriptorType != USB_DT_INTERFACE)
                        continue;

                if (snprintf(if_str, 8, ":%02x%02x%02x",
                             desc->bInterfaceClass,
                             desc->bInterfaceSubClass,
                             desc->bInterfaceProtocol) != 7)
                        continue;

                if (strstr(ifs_str, if_str))
                        continue;

                memcpy(&ifs_str[strpos], if_str, 8),
                strpos += 7;
        }

        if (strpos > 0) {
                ifs_str[strpos++] = ':';
                ifs_str[strpos++] = '\0';
        }

        return 0;
}

/*
 * A unique USB identification is generated like this:
 *
 * 1.) Get the USB device type from InterfaceClass and InterfaceSubClass
 * 2.) If the device type is 'Mass-Storage/SPC-2' or 'Mass-Storage/RBC',
 *     use the SCSI vendor and model as USB-Vendor and USB-model.
 * 3.) Otherwise, use the USB manufacturer and product as
 *     USB-Vendor and USB-model. Any non-printable characters
 *     in those strings will be skipped; a slash '/' will be converted
 *     into a full stop '.'.
 * 4.) If that fails, too, we will use idVendor and idProduct
 *     as USB-Vendor and USB-model.
 * 5.) The USB identification is the USB-vendor and USB-model
 *     string concatenated with an underscore '_'.
 * 6.) If the device supplies a serial number, this number
 *     is concatenated with the identification with an underscore '_'.
 */
static int builtin_usb_id(sd_device *dev, int argc, char *argv[], bool test) {
        char vendor_str[64] = "";
        char vendor_str_enc[256];
        const char *vendor_id;
        char model_str[64] = "";
        char model_str_enc[256];
        const char *product_id;
        char serial_str[UTIL_NAME_SIZE] = "";
        char packed_if_str[UTIL_NAME_SIZE] = "";
        char revision_str[64] = "";
        char type_str[64] = "";
        char instance_str[64] = "";
        const char *ifnum = NULL;
        const char *driver = NULL;
        char serial[256];

        sd_device *dev_interface, *dev_usb;
        const char *if_class, *if_subclass;
        int if_class_num;
        int protocol = 0;
        size_t l;
        char *s;

        const char *syspath, *sysname, *devtype, *interface_syspath;
        int r;

        assert(dev);

        r = sd_device_get_syspath(dev, &syspath);
        if (r < 0)
                return r;

        r = sd_device_get_sysname(dev, &sysname);
        if (r < 0)
                return r;

        /* shortcut, if we are called directly for a "usb_device" type */
        if (sd_device_get_devtype(dev, &devtype) >= 0 && streq(devtype, "usb_device")) {
                dev_if_packed_info(dev, packed_if_str, sizeof(packed_if_str));
                dev_usb = dev;
                goto fallback;
        }

        /* usb interface directory */
        r = sd_device_get_parent_with_subsystem_devtype(dev, "usb", "usb_interface", &dev_interface);
        if (r < 0)
                return log_device_debug_errno(dev, r, "Failed to access usb_interface: %m");

        r = sd_device_get_syspath(dev_interface, &interface_syspath);
        if (r < 0)
                return log_device_debug_errno(dev_interface, r, "Failed to get syspath: %m");
        (void) sd_device_get_sysattr_value(dev_interface, "bInterfaceNumber", &ifnum);
        (void) sd_device_get_sysattr_value(dev_interface, "driver", &driver);

        r = sd_device_get_sysattr_value(dev_interface, "bInterfaceClass", &if_class);
        if (r < 0)
                return log_device_debug_errno(dev_interface, r, "Failed to get bInterfaceClass attribute: %m");

        if_class_num = strtoul(if_class, NULL, 16);
        if (if_class_num == 8) {
                /* mass storage */
                if (sd_device_get_sysattr_value(dev_interface, "bInterfaceSubClass", &if_subclass) >= 0)
                        protocol = set_usb_mass_storage_ifsubtype(type_str, if_subclass, sizeof(type_str)-1);
        } else
                set_usb_iftype(type_str, if_class_num, sizeof(type_str)-1);

        log_device_debug(dev_interface, "if_class:%d protocol:%d", if_class_num, protocol);

        /* usb device directory */
        r = sd_device_get_parent_with_subsystem_devtype(dev_interface, "usb", "usb_device", &dev_usb);
        if (r < 0)
                return log_device_debug_errno(dev_interface, r, "Failed to find parent 'usb' device");

        /* all interfaces of the device in a single string */
        dev_if_packed_info(dev_usb, packed_if_str, sizeof(packed_if_str));

        /* mass storage : SCSI or ATAPI */
        if (IN_SET(protocol, 6, 2)) {
                sd_device *dev_scsi;
                const char *scsi_sysname, *scsi_model, *scsi_vendor, *scsi_type, *scsi_rev;
                int host, bus, target, lun;

                /* get scsi device */
                r = sd_device_get_parent_with_subsystem_devtype(dev, "scsi", "scsi_device", &dev_scsi);
                if (r < 0) {
                        log_device_debug_errno(dev, r, "Unable to find parent SCSI device");
                        goto fallback;
                }
                if (sd_device_get_sysname(dev_scsi, &scsi_sysname) < 0)
                        goto fallback;
                if (sscanf(scsi_sysname, "%d:%d:%d:%d", &host, &bus, &target, &lun) != 4) {
                        log_device_debug(dev_scsi, "Invalid SCSI device");
                        goto fallback;
                }

                /* Generic SPC-2 device */
                r = sd_device_get_sysattr_value(dev_scsi, "vendor", &scsi_vendor);
                if (r < 0) {
                        log_device_debug_errno(dev_scsi, r, "Failed to get SCSI vendor attribute: %m");
                        goto fallback;
                }
                udev_util_encode_string(scsi_vendor, vendor_str_enc, sizeof(vendor_str_enc));
                util_replace_whitespace(scsi_vendor, vendor_str, sizeof(vendor_str)-1);
                util_replace_chars(vendor_str, NULL);

                r = sd_device_get_sysattr_value(dev_scsi, "model", &scsi_model);
                if (r < 0) {
                        log_device_debug_errno(dev_scsi, r, "Failed to get SCSI model attribute: %m");
                        goto fallback;
                }
                udev_util_encode_string(scsi_model, model_str_enc, sizeof(model_str_enc));
                util_replace_whitespace(scsi_model, model_str, sizeof(model_str)-1);
                util_replace_chars(model_str, NULL);

                r = sd_device_get_sysattr_value(dev_scsi, "type", &scsi_type);
                if (r < 0) {
                        log_device_debug_errno(dev_scsi, r, "Failed to get SCSI type attribute: %m");
                        goto fallback;
                }
                set_scsi_type(type_str, scsi_type, sizeof(type_str)-1);

                r = sd_device_get_sysattr_value(dev_scsi, "rev", &scsi_rev);
                if (r < 0) {
                        log_device_debug_errno(dev_scsi, r, "Failed to get SCSI revision attribute: %m");
                        goto fallback;
                }
                util_replace_whitespace(scsi_rev, revision_str, sizeof(revision_str)-1);
                util_replace_chars(revision_str, NULL);

                /*
                 * some broken devices have the same identifiers
                 * for all luns, export the target:lun number
                 */
                sprintf(instance_str, "%d:%d", target, lun);
        }

fallback:
        r = sd_device_get_sysattr_value(dev_usb, "idVendor", &vendor_id);
        if (r < 0)
                return log_device_debug_errno(dev_usb, r, "Failed to get idVendor attribute: %m");

        r = sd_device_get_sysattr_value(dev_usb, "idProduct", &product_id);
        if (r < 0)
                return log_device_debug_errno(dev_usb, r, "Failed to get idProduct attribute: %m");

        /* fall back to USB vendor & device */
        if (vendor_str[0] == '\0') {
                const char *usb_vendor;

                if (sd_device_get_sysattr_value(dev_usb, "manufacturer", &usb_vendor) < 0)
                        usb_vendor = vendor_id;
                udev_util_encode_string(usb_vendor, vendor_str_enc, sizeof(vendor_str_enc));
                util_replace_whitespace(usb_vendor, vendor_str, sizeof(vendor_str)-1);
                util_replace_chars(vendor_str, NULL);
        }

        if (model_str[0] == '\0') {
                const char *usb_model;

                if (sd_device_get_sysattr_value(dev_usb, "product", &usb_model) < 0)
                        usb_model = product_id;
                udev_util_encode_string(usb_model, model_str_enc, sizeof(model_str_enc));
                util_replace_whitespace(usb_model, model_str, sizeof(model_str)-1);
                util_replace_chars(model_str, NULL);
        }

        if (revision_str[0] == '\0') {
                const char *usb_rev;

                if (sd_device_get_sysattr_value(dev_usb, "bcdDevice", &usb_rev) >= 0) {
                        util_replace_whitespace(usb_rev, revision_str, sizeof(revision_str)-1);
                        util_replace_chars(revision_str, NULL);
                }
        }

        if (serial_str[0] == '\0') {
                const char *usb_serial;

                if (sd_device_get_sysattr_value(dev_usb, "serial", &usb_serial) >= 0) {
                        const unsigned char *p;

                        /* http://msdn.microsoft.com/en-us/library/windows/hardware/gg487321.aspx */
                        for (p = (unsigned char *) usb_serial; *p != '\0'; p++)
                                if (*p < 0x20 || *p > 0x7f || *p == ',') {
                                        usb_serial = NULL;
                                        break;
                                }

                        if (usb_serial) {
                                util_replace_whitespace(usb_serial, serial_str, sizeof(serial_str)-1);
                                util_replace_chars(serial_str, NULL);
                        }
                }
        }

        s = serial;
        l = strpcpyl(&s, sizeof(serial), vendor_str, "_", model_str, NULL);
        if (!isempty(serial_str))
                l = strpcpyl(&s, l, "_", serial_str, NULL);

        if (!isempty(instance_str))
                strpcpyl(&s, l, "-", instance_str, NULL);

        udev_builtin_add_property(dev, test, "ID_VENDOR", vendor_str);
        udev_builtin_add_property(dev, test, "ID_VENDOR_ENC", vendor_str_enc);
        udev_builtin_add_property(dev, test, "ID_VENDOR_ID", vendor_id);
        udev_builtin_add_property(dev, test, "ID_MODEL", model_str);
        udev_builtin_add_property(dev, test, "ID_MODEL_ENC", model_str_enc);
        udev_builtin_add_property(dev, test, "ID_MODEL_ID", product_id);
        udev_builtin_add_property(dev, test, "ID_REVISION", revision_str);
        udev_builtin_add_property(dev, test, "ID_SERIAL", serial);
        if (!isempty(serial_str))
                udev_builtin_add_property(dev, test, "ID_SERIAL_SHORT", serial_str);
        if (!isempty(type_str))
                udev_builtin_add_property(dev, test, "ID_TYPE", type_str);
        if (!isempty(instance_str))
                udev_builtin_add_property(dev, test, "ID_INSTANCE", instance_str);
        udev_builtin_add_property(dev, test, "ID_BUS", "usb");
        if (!isempty(packed_if_str))
                udev_builtin_add_property(dev, test, "ID_USB_INTERFACES", packed_if_str);
        if (ifnum)
                udev_builtin_add_property(dev, test, "ID_USB_INTERFACE_NUM", ifnum);
        if (driver)
                udev_builtin_add_property(dev, test, "ID_USB_DRIVER", driver);
        return 0;
}

const UdevBuiltin udev_builtin_usb_id = {
        .name = "usb_id",
        .cmd = builtin_usb_id,
        .help = "USB device properties",
        .run_once = true,
};
Commit	Line	Data
e7145211	1	/* SPDX-License-Identifier: GPL-2.0+ */
d7867b31 KS	2	/*
	3	* USB device properties and persistent device path
	4	*
	5	* Copyright (c) 2005 SUSE Linux Products GmbH, Germany
	6	* Author: Hannes Reinecke <hare@suse.de>
d7867b31 KS	7	*/
d7867b31 KS	8
07630cea LP	9	#include <ctype.h>
	10	#include <errno.h>
	11	#include <fcntl.h>
	12	#include <stdarg.h>
d7867b31 KS	13	#include <stdio.h>
d7867b31 KS	14	#include <stdlib.h>
07630cea	15	#include <unistd.h>
d7867b31	16
b5efdb8a	17	#include "alloc-util.h"
9a6e5c24	18	#include "device-util.h"
3ffd4af2	19	#include "fd-util.h"
5ea78a39	20	#include "libudev-util.h"
07630cea	21	#include "string-util.h"
5ea78a39	22	#include "strxcpyx.h"
07a26e42	23	#include "udev-builtin.h"
d7867b31	24
9ec6e95b	25	static void set_usb_iftype(char *to, int if_class_num, size_t len) {
04a9d3a0	26	const char *type = "generic";
912541b0 KS	27
	28	switch (if_class_num) {
	29	case 1:
	30	type = "audio";
	31	break;
	32	case 2: /* CDC-Control */
	33	break;
	34	case 3:
	35	type = "hid";
	36	break;
	37	case 5: /* Physical */
	38	break;
	39	case 6:
	40	type = "media";
	41	break;
	42	case 7:
	43	type = "printer";
	44	break;
	45	case 8:
	46	type = "storage";
	47	break;
	48	case 9:
	49	type = "hub";
	50	break;
	51	case 0x0a: /* CDC-Data */
	52	break;
	53	case 0x0b: /* Chip/Smart Card */
	54	break;
	55	case 0x0d: /* Content Security */
	56	break;
	57	case 0x0e:
	58	type = "video";
	59	break;
	60	case 0xdc: /* Diagnostic Device */
	61	break;
	62	case 0xe0: /* Wireless Controller */
	63	break;
	64	case 0xfe: /* Application-specific */
	65	break;
	66	case 0xff: /* Vendor-specific */
	67	break;
	68	default:
	69	break;
	70	}
	71	strncpy(to, type, len);
	72	to[len-1] = '\0';
d7867b31 KS	73	}
d7867b31 KS	74
9ec6e95b	75	static int set_usb_mass_storage_ifsubtype(char to, const char from, size_t len) {
912541b0 KS	76	int type_num = 0;
912541b0 KS	77	char *eptr;
04a9d3a0	78	const char *type = "generic";
912541b0 KS	79
	80	type_num = strtoul(from, &eptr, 0);
	81	if (eptr != from) {
	82	switch (type_num) {
f6f2ad9b KS	83	case 1: /* RBC devices */
	84	type = "rbc";
	85	break;
912541b0 KS	86	case 2:
	87	type = "atapi";
	88	break;
	89	case 3:
	90	type = "tape";
	91	break;
	92	case 4: /* UFI */
912541b0 KS	93	type = "floppy";
912541b0 KS	94	break;
912541b0 KS	95	case 6: /* Transparent SPC-2 devices */
	96	type = "scsi";
	97	break;
	98	default:
	99	break;
	100	}
	101	}
d5a89d7d	102	strscpy(to, len, type);
912541b0	103	return type_num;
d7867b31 KS	104	}
d7867b31 KS	105
9ec6e95b	106	static void set_scsi_type(char to, const char from, size_t len) {
912541b0 KS	107	int type_num;
912541b0 KS	108	char *eptr;
04a9d3a0	109	const char *type = "generic";
912541b0 KS	110
	111	type_num = strtoul(from, &eptr, 0);
	112	if (eptr != from) {
	113	switch (type_num) {
	114	case 0:
	115	case 0xe:
	116	type = "disk";
	117	break;
	118	case 1:
	119	type = "tape";
	120	break;
	121	case 4:
	122	case 7:
	123	case 0xf:
	124	type = "optical";
	125	break;
	126	case 5:
	127	type = "cd";
	128	break;
	129	default:
	130	break;
	131	}
	132	}
d5a89d7d	133	strscpy(to, len, type);
d7867b31 KS	134	}
d7867b31 KS	135
912541b0 KS	136	#define USB_DT_DEVICE 0x01
912541b0 KS	137	#define USB_DT_INTERFACE 0x04
d7867b31	138
71bd61c5	139	static int dev_if_packed_info(sd_device dev, char ifs_str, size_t len) {
7fd1b19b	140	_cleanup_close_ int fd = -1;
912541b0 KS	141	ssize_t size;
912541b0 KS	142	unsigned char buf[18 + 65535];
24bfda11	143	size_t pos = 0;
bad490b0	144	unsigned strpos = 0;
8bdca77c	145	const char filename, syspath;
71bd61c5	146	int r;
912541b0	147	struct usb_interface_descriptor {
24bfda11 ZJS	148	uint8_t bLength;
	149	uint8_t bDescriptorType;
	150	uint8_t bInterfaceNumber;
	151	uint8_t bAlternateSetting;
	152	uint8_t bNumEndpoints;
	153	uint8_t bInterfaceClass;
	154	uint8_t bInterfaceSubClass;
	155	uint8_t bInterfaceProtocol;
	156	uint8_t iInterface;
885fdebc	157	} _packed_;
912541b0	158
71bd61c5 YW	159	r = sd_device_get_syspath(dev, &syspath);
	160	if (r < 0)
	161	return r;
bad490b0	162
8bdca77c	163	filename = strjoina(syspath, "/descriptors");
912541b0	164	fd = open(filename, O_RDONLY\|O_CLOEXEC);
8d8ce9e2	165	if (fd < 0)
8bdca77c	166	return log_device_debug_errno(dev, errno, "Failed to open \"%s\": %m", filename);
bad490b0	167
912541b0	168	size = read(fd, buf, sizeof(buf));
760034be ZJS	169	if (size < 18)
	170	return log_device_warning_errno(dev, SYNTHETIC_ERRNO(EIO),
	171	"Short read from \"%s\"", filename);
	172	assert((size_t) size <= sizeof buf);
912541b0	173
912541b0	174	ifs_str[0] = '\0';
24bfda11 ZJS	175	while (pos + sizeof(struct usb_interface_descriptor) < (size_t) size &&
	176	strpos + 7 < len - 2) {
	177
912541b0 KS	178	struct usb_interface_descriptor *desc;
	179	char if_str[8];
	180
760034be	181	desc = (struct usb_interface_descriptor *) (buf + pos);
912541b0 KS	182	if (desc->bLength < 3)
912541b0 KS	183	break;
760034be ZJS	184	if (desc->bLength > size - sizeof(struct usb_interface_descriptor))
	185	return log_device_debug_errno(dev, SYNTHETIC_ERRNO(EIO),
	186	"Corrupt data read from \"%s\"", filename);
912541b0 KS	187	pos += desc->bLength;
	188
	189	if (desc->bDescriptorType != USB_DT_INTERFACE)
	190	continue;
	191
	192	if (snprintf(if_str, 8, ":%02x%02x%02x",
	193	desc->bInterfaceClass,
	194	desc->bInterfaceSubClass,
	195	desc->bInterfaceProtocol) != 7)
	196	continue;
	197
4e361acc	198	if (strstr(ifs_str, if_str))
912541b0 KS	199	continue;
	200
	201	memcpy(&ifs_str[strpos], if_str, 8),
	202	strpos += 7;
	203	}
bad490b0	204
912541b0 KS	205	if (strpos > 0) {
	206	ifs_str[strpos++] = ':';
	207	ifs_str[strpos++] = '\0';
	208	}
bad490b0 ZJS	209
bad490b0 ZJS	210	return 0;
d7867b31 KS	211	}
	212
	213	/*
	214	* A unique USB identification is generated like this:
	215	*
	216	* 1.) Get the USB device type from InterfaceClass and InterfaceSubClass
73e231ab	217	* 2.) If the device type is 'Mass-Storage/SPC-2' or 'Mass-Storage/RBC',
d7867b31	218	* use the SCSI vendor and model as USB-Vendor and USB-model.
73e231ab	219	* 3.) Otherwise, use the USB manufacturer and product as
d7867b31 KS	220	* USB-Vendor and USB-model. Any non-printable characters
	221	* in those strings will be skipped; a slash '/' will be converted
	222	* into a full stop '.'.
	223	* 4.) If that fails, too, we will use idVendor and idProduct
	224	* as USB-Vendor and USB-model.
	225	* 5.) The USB identification is the USB-vendor and USB-model
	226	* string concatenated with an underscore '_'.
	227	* 6.) If the device supplies a serial number, this number
	228	* is concatenated with the identification with an underscore '_'.
	229	*/
3fc2e9a2	230	static int builtin_usb_id(sd_device dev, int argc, char argv[], bool test) {
4beac74e	231	char vendor_str[64] = "";
912541b0 KS	232	char vendor_str_enc[256];
912541b0 KS	233	const char *vendor_id;
4beac74e	234	char model_str[64] = "";
912541b0 KS	235	char model_str_enc[256];
912541b0 KS	236	const char *product_id;
4beac74e ZJS	237	char serial_str[UTIL_NAME_SIZE] = "";
	238	char packed_if_str[UTIL_NAME_SIZE] = "";
	239	char revision_str[64] = "";
	240	char type_str[64] = "";
	241	char instance_str[64] = "";
912541b0 KS	242	const char *ifnum = NULL;
	243	const char *driver = NULL;
	244	char serial[256];
	245
71bd61c5	246	sd_device dev_interface, dev_usb;
912541b0 KS	247	const char if_class, if_subclass;
	248	int if_class_num;
	249	int protocol = 0;
	250	size_t l;
	251	char *s;
	252
71bd61c5 YW	253	const char syspath, sysname, devtype, interface_syspath;
71bd61c5 YW	254	int r;
71bd61c5	255
3b64e4d4 TG	256	assert(dev);
3b64e4d4 TG	257
71bd61c5 YW	258	r = sd_device_get_syspath(dev, &syspath);
71bd61c5 YW	259	if (r < 0)
d354690e	260	return r;
71bd61c5 YW	261
	262	r = sd_device_get_sysname(dev, &sysname);
	263	if (r < 0)
d354690e	264	return r;
71bd61c5	265
912541b0	266	/* shortcut, if we are called directly for a "usb_device" type */
71bd61c5	267	if (sd_device_get_devtype(dev, &devtype) >= 0 && streq(devtype, "usb_device")) {
912541b0 KS	268	dev_if_packed_info(dev, packed_if_str, sizeof(packed_if_str));
	269	dev_usb = dev;
	270	goto fallback;
	271	}
	272
	273	/* usb interface directory */
71bd61c5	274	r = sd_device_get_parent_with_subsystem_devtype(dev, "usb", "usb_interface", &dev_interface);
d354690e	275	if (r < 0)
9a6e5c24	276	return log_device_debug_errno(dev, r, "Failed to access usb_interface: %m");
912541b0	277
71bd61c5 YW	278	r = sd_device_get_syspath(dev_interface, &interface_syspath);
71bd61c5 YW	279	if (r < 0)
9a6e5c24	280	return log_device_debug_errno(dev_interface, r, "Failed to get syspath: %m");
71bd61c5 YW	281	(void) sd_device_get_sysattr_value(dev_interface, "bInterfaceNumber", &ifnum);
71bd61c5 YW	282	(void) sd_device_get_sysattr_value(dev_interface, "driver", &driver);
912541b0	283
71bd61c5	284	r = sd_device_get_sysattr_value(dev_interface, "bInterfaceClass", &if_class);
d354690e	285	if (r < 0)
9a6e5c24	286	return log_device_debug_errno(dev_interface, r, "Failed to get bInterfaceClass attribute: %m");
912541b0 KS	287
	288	if_class_num = strtoul(if_class, NULL, 16);
	289	if (if_class_num == 8) {
	290	/* mass storage */
71bd61c5	291	if (sd_device_get_sysattr_value(dev_interface, "bInterfaceSubClass", &if_subclass) >= 0)
912541b0	292	protocol = set_usb_mass_storage_ifsubtype(type_str, if_subclass, sizeof(type_str)-1);
71bd61c5	293	} else
912541b0	294	set_usb_iftype(type_str, if_class_num, sizeof(type_str)-1);
912541b0	295
9a6e5c24	296	log_device_debug(dev_interface, "if_class:%d protocol:%d", if_class_num, protocol);
912541b0 KS	297
912541b0 KS	298	/* usb device directory */
71bd61c5	299	r = sd_device_get_parent_with_subsystem_devtype(dev_interface, "usb", "usb_device", &dev_usb);
d354690e	300	if (r < 0)
9a6e5c24	301	return log_device_debug_errno(dev_interface, r, "Failed to find parent 'usb' device");
912541b0 KS	302
	303	/* all interfaces of the device in a single string */
	304	dev_if_packed_info(dev_usb, packed_if_str, sizeof(packed_if_str));
	305
	306	/* mass storage : SCSI or ATAPI */
4c701096	307	if (IN_SET(protocol, 6, 2)) {
71bd61c5 YW	308	sd_device *dev_scsi;
71bd61c5 YW	309	const char scsi_sysname, scsi_model, scsi_vendor, scsi_type, *scsi_rev;
912541b0 KS	310	int host, bus, target, lun;
	311
	312	/* get scsi device */
71bd61c5 YW	313	r = sd_device_get_parent_with_subsystem_devtype(dev, "scsi", "scsi_device", &dev_scsi);
71bd61c5 YW	314	if (r < 0) {
9a6e5c24	315	log_device_debug_errno(dev, r, "Unable to find parent SCSI device");
912541b0 KS	316	goto fallback;
912541b0 KS	317	}
71bd61c5 YW	318	if (sd_device_get_sysname(dev_scsi, &scsi_sysname) < 0)
	319	goto fallback;
	320	if (sscanf(scsi_sysname, "%d:%d:%d:%d", &host, &bus, &target, &lun) != 4) {
9a6e5c24	321	log_device_debug(dev_scsi, "Invalid SCSI device");
912541b0 KS	322	goto fallback;
	323	}
	324
	325	/* Generic SPC-2 device */
71bd61c5 YW	326	r = sd_device_get_sysattr_value(dev_scsi, "vendor", &scsi_vendor);
71bd61c5 YW	327	if (r < 0) {
9a6e5c24	328	log_device_debug_errno(dev_scsi, r, "Failed to get SCSI vendor attribute: %m");
912541b0 KS	329	goto fallback;
	330	}
	331	udev_util_encode_string(scsi_vendor, vendor_str_enc, sizeof(vendor_str_enc));
	332	util_replace_whitespace(scsi_vendor, vendor_str, sizeof(vendor_str)-1);
	333	util_replace_chars(vendor_str, NULL);
	334
71bd61c5 YW	335	r = sd_device_get_sysattr_value(dev_scsi, "model", &scsi_model);
71bd61c5 YW	336	if (r < 0) {
9a6e5c24	337	log_device_debug_errno(dev_scsi, r, "Failed to get SCSI model attribute: %m");
912541b0 KS	338	goto fallback;
	339	}
	340	udev_util_encode_string(scsi_model, model_str_enc, sizeof(model_str_enc));
	341	util_replace_whitespace(scsi_model, model_str, sizeof(model_str)-1);
	342	util_replace_chars(model_str, NULL);
	343
71bd61c5 YW	344	r = sd_device_get_sysattr_value(dev_scsi, "type", &scsi_type);
71bd61c5 YW	345	if (r < 0) {
9a6e5c24	346	log_device_debug_errno(dev_scsi, r, "Failed to get SCSI type attribute: %m");
912541b0 KS	347	goto fallback;
	348	}
	349	set_scsi_type(type_str, scsi_type, sizeof(type_str)-1);
	350
71bd61c5 YW	351	r = sd_device_get_sysattr_value(dev_scsi, "rev", &scsi_rev);
71bd61c5 YW	352	if (r < 0) {
9a6e5c24	353	log_device_debug_errno(dev_scsi, r, "Failed to get SCSI revision attribute: %m");
912541b0 KS	354	goto fallback;
	355	}
	356	util_replace_whitespace(scsi_rev, revision_str, sizeof(revision_str)-1);
	357	util_replace_chars(revision_str, NULL);
	358
	359	/*
	360	* some broken devices have the same identifiers
	361	* for all luns, export the target:lun number
	362	*/
	363	sprintf(instance_str, "%d:%d", target, lun);
	364	}
d7867b31 KS	365
d7867b31 KS	366	fallback:
71bd61c5 YW	367	r = sd_device_get_sysattr_value(dev_usb, "idVendor", &vendor_id);
71bd61c5 YW	368	if (r < 0)
9a6e5c24	369	return log_device_debug_errno(dev_usb, r, "Failed to get idVendor attribute: %m");
71bd61c5 YW	370
	371	r = sd_device_get_sysattr_value(dev_usb, "idProduct", &product_id);
	372	if (r < 0)
9a6e5c24	373	return log_device_debug_errno(dev_usb, r, "Failed to get idProduct attribute: %m");
912541b0	374
2aed63f4	375	/* fall back to USB vendor & device */
912541b0	376	if (vendor_str[0] == '\0') {
71bd61c5	377	const char *usb_vendor;
912541b0	378
71bd61c5	379	if (sd_device_get_sysattr_value(dev_usb, "manufacturer", &usb_vendor) < 0)
912541b0	380	usb_vendor = vendor_id;
912541b0 KS	381	udev_util_encode_string(usb_vendor, vendor_str_enc, sizeof(vendor_str_enc));
	382	util_replace_whitespace(usb_vendor, vendor_str, sizeof(vendor_str)-1);
	383	util_replace_chars(vendor_str, NULL);
	384	}
	385
	386	if (model_str[0] == '\0') {
71bd61c5	387	const char *usb_model;
912541b0	388
71bd61c5	389	if (sd_device_get_sysattr_value(dev_usb, "product", &usb_model) < 0)
912541b0	390	usb_model = product_id;
912541b0 KS	391	udev_util_encode_string(usb_model, model_str_enc, sizeof(model_str_enc));
	392	util_replace_whitespace(usb_model, model_str, sizeof(model_str)-1);
	393	util_replace_chars(model_str, NULL);
	394	}
	395
	396	if (revision_str[0] == '\0') {
	397	const char *usb_rev;
	398
71bd61c5	399	if (sd_device_get_sysattr_value(dev_usb, "bcdDevice", &usb_rev) >= 0) {
912541b0 KS	400	util_replace_whitespace(usb_rev, revision_str, sizeof(revision_str)-1);
	401	util_replace_chars(revision_str, NULL);
	402	}
	403	}
	404
	405	if (serial_str[0] == '\0') {
	406	const char *usb_serial;
	407
71bd61c5	408	if (sd_device_get_sysattr_value(dev_usb, "serial", &usb_serial) >= 0) {
a2cbfd59 KS	409	const unsigned char *p;
	410
	411	/* http://msdn.microsoft.com/en-us/library/windows/hardware/gg487321.aspx */
9a6e5c24	412	for (p = (unsigned char ) usb_serial; p != '\0'; p++)
a2cbfd59 KS	413	if (p < 0x20 \|\| p > 0x7f \|\| *p == ',') {
	414	usb_serial = NULL;
	415	break;
	416	}
a2cbfd59	417
71bd61c5 YW	418	if (usb_serial) {
	419	util_replace_whitespace(usb_serial, serial_str, sizeof(serial_str)-1);
	420	util_replace_chars(serial_str, NULL);
	421	}
912541b0 KS	422	}
	423	}
	424
	425	s = serial;
d5a89d7d	426	l = strpcpyl(&s, sizeof(serial), vendor_str, "_", model_str, NULL);
38b9855b	427	if (!isempty(serial_str))
d5a89d7d	428	l = strpcpyl(&s, l, "_", serial_str, NULL);
912541b0	429
38b9855b	430	if (!isempty(instance_str))
d5a89d7d	431	strpcpyl(&s, l, "-", instance_str, NULL);
912541b0	432
71bd61c5 YW	433	udev_builtin_add_property(dev, test, "ID_VENDOR", vendor_str);
	434	udev_builtin_add_property(dev, test, "ID_VENDOR_ENC", vendor_str_enc);
	435	udev_builtin_add_property(dev, test, "ID_VENDOR_ID", vendor_id);
	436	udev_builtin_add_property(dev, test, "ID_MODEL", model_str);
	437	udev_builtin_add_property(dev, test, "ID_MODEL_ENC", model_str_enc);
	438	udev_builtin_add_property(dev, test, "ID_MODEL_ID", product_id);
	439	udev_builtin_add_property(dev, test, "ID_REVISION", revision_str);
	440	udev_builtin_add_property(dev, test, "ID_SERIAL", serial);
38b9855b	441	if (!isempty(serial_str))
71bd61c5	442	udev_builtin_add_property(dev, test, "ID_SERIAL_SHORT", serial_str);
38b9855b	443	if (!isempty(type_str))
71bd61c5	444	udev_builtin_add_property(dev, test, "ID_TYPE", type_str);
38b9855b	445	if (!isempty(instance_str))
71bd61c5 YW	446	udev_builtin_add_property(dev, test, "ID_INSTANCE", instance_str);
71bd61c5 YW	447	udev_builtin_add_property(dev, test, "ID_BUS", "usb");
38b9855b	448	if (!isempty(packed_if_str))
71bd61c5 YW	449	udev_builtin_add_property(dev, test, "ID_USB_INTERFACES", packed_if_str);
	450	if (ifnum)
	451	udev_builtin_add_property(dev, test, "ID_USB_INTERFACE_NUM", ifnum);
	452	if (driver)
	453	udev_builtin_add_property(dev, test, "ID_USB_DRIVER", driver);
d354690e	454	return 0;
d7867b31 KS	455	}
d7867b31 KS	456
25de7aa7	457	const UdevBuiltin udev_builtin_usb_id = {
912541b0 KS	458	.name = "usb_id",
912541b0 KS	459	.cmd = builtin_usb_id,
5ac0162c	460	.help = "USB device properties",
912541b0	461	.run_once = true,
d7867b31	462	};