-/*
- * usb_id - identify an USB device
- *
- * Copyright (c) 2005 SUSE Linux Products GmbH, Germany
- *
- * Author:
- * Hannes Reinecke <hare@suse.de>
- *
- * 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 version 2 of the License.
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <stdarg.h>
-#include <unistd.h>
-#include <string.h>
-#include <ctype.h>
-#include <fcntl.h>
-#include <errno.h>
-#include <getopt.h>
-
-#include "../../udev/udev.h"
-
-int debug;
-
-static void log_fn(struct udev *udev, int priority,
- const char *file, int line, const char *fn,
- const char *format, va_list args)
-{
- if (debug) {
- fprintf(stderr, "%s: ", fn != NULL ? fn : file);
- vfprintf(stderr, format, args);
- } else {
- vsyslog(priority, format, args);
- }
-}
-
-static char vendor_str[64];
-static char vendor_str_enc[256];
-static const char *vendor_id = "";
-static char model_str[64];
-static char model_str_enc[256];
-static const char *product_id = "";
-static char serial_str[UTIL_NAME_SIZE];
-static char packed_if_str[UTIL_NAME_SIZE];
-static char revision_str[64];
-static char type_str[64];
-static char instance_str[64];
-static const char *ifnum;
-static const char *driver;
-
-static int use_usb_info;
-static int use_num_info;
-
-static void set_usb_iftype(char *to, int if_class_num, size_t len)
-{
- 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;
- char *type = "generic";
-
- type_num = strtoul(from, &eptr, 0);
- if (eptr != from) {
- switch (type_num) {
- case 2:
- type = "atapi";
- break;
- case 3:
- type = "tape";
- break;
- case 4: /* UFI */
- case 5: /* SFF-8070i */
- type = "floppy";
- break;
- case 1: /* RBC devices */
- type = "rbc";
- break;
- case 6: /* Transparent SPC-2 devices */
- type = "scsi";
- break;
- default:
- break;
- }
- }
- util_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;
- 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;
- }
- }
- util_strscpy(to, len, type);
-}
-
-#define USB_DT_DEVICE 0x01
-#define USB_DT_INTERFACE 0x04
-
-static int dev_if_packed_info(struct udev_device *dev, char *ifs_str, size_t len)
-{
- char *filename = NULL;
- int fd;
- ssize_t size;
- unsigned char buf[18 + 65535];
- unsigned int pos, strpos;
- struct usb_interface_descriptor {
- u_int8_t bLength;
- u_int8_t bDescriptorType;
- u_int8_t bInterfaceNumber;
- u_int8_t bAlternateSetting;
- u_int8_t bNumEndpoints;
- u_int8_t bInterfaceClass;
- u_int8_t bInterfaceSubClass;
- u_int8_t bInterfaceProtocol;
- u_int8_t iInterface;
- } __attribute__((packed));
- int err = 0;
-
- if (asprintf(&filename, "%s/descriptors", udev_device_get_syspath(dev)) < 0) {
- err = -1;
- goto out;
- }
- fd = open(filename, O_RDONLY);
- if (fd < 0) {
- fprintf(stderr, "error opening USB device 'descriptors' file\n");
- err = -1;
- goto out;
- }
- size = read(fd, buf, sizeof(buf));
- close(fd);
- if (size < 18 || size == sizeof(buf)) {
- err = -1;
- goto out;
- }
-
- pos = 0;
- strpos = 0;
- while (pos < sizeof(buf) && strpos+7 < len) {
- struct usb_interface_descriptor *desc;
- char if_str[8];
-
- desc = (struct usb_interface_descriptor *) &buf[pos];
- if (desc->bLength < 3)
- break;
- 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) != NULL)
- continue;
-
- memcpy(&ifs_str[strpos], if_str, 8),
- strpos += 7;
- }
-out:
- free(filename);
- return err;
-}
-
-/*
- * 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 usb_id(struct udev_device *dev)
-{
- struct udev *udev = udev_device_get_udev(dev);
- struct udev_device *dev_interface = NULL;
- struct udev_device *dev_usb = NULL;
- const char *if_class, *if_subclass;
- int if_class_num;
- int protocol = 0;
-
- dbg(udev, "syspath %s\n", udev_device_get_syspath(dev));
-
- /* shortcut, if we are called directly for a "usb_device" type */
- if (udev_device_get_devtype(dev) != NULL && strcmp(udev_device_get_devtype(dev), "usb_device") == 0) {
- dev_if_packed_info(dev, packed_if_str, sizeof(packed_if_str));
- dev_usb = dev;
- goto fallback;
- }
-
- /* usb interface directory */
- dev_interface = udev_device_get_parent_with_subsystem_devtype(dev, "usb", "usb_interface");
- if (dev_interface == NULL) {
- info(udev, "unable to access usb_interface device of '%s'\n",
- udev_device_get_syspath(dev));
- return 1;
- }
-
- ifnum = udev_device_get_sysattr_value(dev_interface, "bInterfaceNumber");
- driver = udev_device_get_sysattr_value(dev_interface, "driver");
-
- if_class = udev_device_get_sysattr_value(dev_interface, "bInterfaceClass");
- if (!if_class) {
- info(udev, "%s: cannot get bInterfaceClass attribute\n",
- udev_device_get_sysname(dev));
- return 1;
- }
-
- if_class_num = strtoul(if_class, NULL, 16);
- if (if_class_num == 8) {
- /* mass storage */
- if_subclass = udev_device_get_sysattr_value(dev_interface, "bInterfaceSubClass");
- if (if_subclass != NULL)
- 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);
- }
-
- info(udev, "%s: if_class %d protocol %d\n",
- udev_device_get_syspath(dev_interface), if_class_num, protocol);
-
- /* usb device directory */
- dev_usb = udev_device_get_parent_with_subsystem_devtype(dev_interface, "usb", "usb_device");
- if (!dev_usb) {
- info(udev, "unable to find parent 'usb' device of '%s'\n",
- udev_device_get_syspath(dev));
- return 1;
- }
-
- /* 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 ((protocol == 6 || protocol == 2) && !use_usb_info) {
- struct udev_device *dev_scsi;
- const char *scsi_model, *scsi_vendor, *scsi_type, *scsi_rev;
- int host, bus, target, lun;
-
- /* get scsi device */
- dev_scsi = udev_device_get_parent_with_subsystem_devtype(dev, "scsi", "scsi_device");
- if (dev_scsi == NULL) {
- info(udev, "unable to find parent 'scsi' device of '%s'\n",
- udev_device_get_syspath(dev));
- goto fallback;
- }
- if (sscanf(udev_device_get_sysname(dev_scsi), "%d:%d:%d:%d", &host, &bus, &target, &lun) != 4) {
- info(udev, "invalid scsi device '%s'\n", udev_device_get_sysname(dev_scsi));
- goto fallback;
- }
-
- /* Generic SPC-2 device */
- scsi_vendor = udev_device_get_sysattr_value(dev_scsi, "vendor");
- if (!scsi_vendor) {
- info(udev, "%s: cannot get SCSI vendor attribute\n",
- udev_device_get_sysname(dev_scsi));
- goto fallback;
- }
- udev_util_encode_string(scsi_vendor, vendor_str_enc, sizeof(vendor_str_enc));
- udev_util_replace_whitespace(scsi_vendor, vendor_str, sizeof(vendor_str)-1);
- udev_util_replace_chars(vendor_str, NULL);
-
- scsi_model = udev_device_get_sysattr_value(dev_scsi, "model");
- if (!scsi_model) {
- info(udev, "%s: cannot get SCSI model attribute\n",
- udev_device_get_sysname(dev_scsi));
- goto fallback;
- }
- udev_util_encode_string(scsi_model, model_str_enc, sizeof(model_str_enc));
- udev_util_replace_whitespace(scsi_model, model_str, sizeof(model_str)-1);
- udev_util_replace_chars(model_str, NULL);
-
- scsi_type = udev_device_get_sysattr_value(dev_scsi, "type");
- if (!scsi_type) {
- info(udev, "%s: cannot get SCSI type attribute\n",
- udev_device_get_sysname(dev_scsi));
- goto fallback;
- }
- set_scsi_type(type_str, scsi_type, sizeof(type_str)-1);
-
- scsi_rev = udev_device_get_sysattr_value(dev_scsi, "rev");
- if (!scsi_rev) {
- info(udev, "%s: cannot get SCSI revision attribute\n",
- udev_device_get_sysname(dev_scsi));
- goto fallback;
- }
- udev_util_replace_whitespace(scsi_rev, revision_str, sizeof(revision_str)-1);
- udev_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:
- vendor_id = udev_device_get_sysattr_value(dev_usb, "idVendor");
- product_id = udev_device_get_sysattr_value(dev_usb, "idProduct");
-
- /* fallback to USB vendor & device */
- if (vendor_str[0] == '\0') {
- const char *usb_vendor = NULL;
-
- if (!use_num_info)
- usb_vendor = udev_device_get_sysattr_value(dev_usb, "manufacturer");
-
- if (!usb_vendor)
- usb_vendor = vendor_id;
-
- if (!usb_vendor) {
- info(udev, "No USB vendor information available\n");
- return 1;
- }
- udev_util_encode_string(usb_vendor, vendor_str_enc, sizeof(vendor_str_enc));
- udev_util_replace_whitespace(usb_vendor, vendor_str, sizeof(vendor_str)-1);
- udev_util_replace_chars(vendor_str, NULL);
- }
-
- if (model_str[0] == '\0') {
- const char *usb_model = NULL;
-
- if (!use_num_info)
- usb_model = udev_device_get_sysattr_value(dev_usb, "product");
-
- if (!usb_model)
- usb_model = product_id;
-
- if (!usb_model) {
- dbg(udev, "No USB model information available\n");
- return 1;
- }
- udev_util_encode_string(usb_model, model_str_enc, sizeof(model_str_enc));
- udev_util_replace_whitespace(usb_model, model_str, sizeof(model_str)-1);
- udev_util_replace_chars(model_str, NULL);
- }
-
- if (revision_str[0] == '\0') {
- const char *usb_rev;
-
- usb_rev = udev_device_get_sysattr_value(dev_usb, "bcdDevice");
- if (usb_rev) {
- udev_util_replace_whitespace(usb_rev, revision_str, sizeof(revision_str)-1);
- udev_util_replace_chars(revision_str, NULL);
- }
- }
-
- if (serial_str[0] == '\0') {
- const char *usb_serial;
-
- usb_serial = udev_device_get_sysattr_value(dev_usb, "serial");
- if (usb_serial) {
- udev_util_replace_whitespace(usb_serial, serial_str, sizeof(serial_str)-1);
- udev_util_replace_chars(serial_str, NULL);
- }
- }
- return 0;
-}
-
-int main(int argc, char **argv)
-{
- static const struct option options[] = {
- { "usb-info", no_argument, NULL, 'u' },
- { "num-info", no_argument, NULL, 'n' },
- { "export", no_argument, NULL, 'x' },
- { "debug", no_argument, NULL, 'd' },
- { "help", no_argument, NULL, 'h' },
- {}
- };
- struct udev *udev;
- struct udev_device *dev = NULL;
- char syspath[UTIL_PATH_SIZE];
- const char *devpath;
- static int export;
- int retval = 0;
-
- udev = udev_new();
- if (udev == NULL)
- goto exit;
-
- logging_init("usb_id");
- udev_set_log_fn(udev, log_fn);
-
- while (1) {
- int option;
-
- option = getopt_long(argc, argv, "dnuxh", options, NULL);
- if (option == -1)
- break;
-
- switch (option) {
- case 'd':
- debug = 1;
- if (udev_get_log_priority(udev) < LOG_INFO)
- udev_set_log_priority(udev, LOG_INFO);
- break;
- case 'n':
- use_num_info = 1;
- use_usb_info = 1;
- break;
- case 'u':
- use_usb_info = 1;
- break;
- case 'x':
- export = 1;
- break;
- case 'h':
- printf("Usage: usb_id [--usb-info] [--num-info] [--export] [--help] <devpath>\n"
- " --usb-info use usb strings instead\n"
- " --num-info use numerical values\n"
- " --export print values as environment keys\n"
- " --help print this help text\n\n");
- default:
- retval = 1;
- goto exit;
- }
- }
-
- devpath = argv[optind];
- if (devpath == NULL) {
- fprintf(stderr, "No device specified\n");
- retval = 1;
- goto exit;
- }
-
- util_strscpyl(syspath, sizeof(syspath), udev_get_sys_path(udev), devpath, NULL);
- dev = udev_device_new_from_syspath(udev, syspath);
- if (dev == NULL) {
- err(udev, "unable to access '%s'\n", devpath);
- return 1;
- }
-
- retval = usb_id(dev);
- if (retval == 0) {
- char serial[256];
- size_t l;
- char *s;
-
- s = serial;
- l = util_strpcpyl(&s, sizeof(serial), vendor_str, "_", model_str, NULL);
- if (serial_str[0] != '\0')
- l = util_strpcpyl(&s, l, "_", serial_str, NULL);
- if (instance_str[0] != '\0')
- util_strpcpyl(&s, l, "-", instance_str, NULL);
-
- if (export) {
- printf("ID_VENDOR=%s\n", vendor_str);
- printf("ID_VENDOR_ENC=%s\n", vendor_str_enc);
- printf("ID_VENDOR_ID=%s\n", vendor_id);
- printf("ID_MODEL=%s\n", model_str);
- printf("ID_MODEL_ENC=%s\n", model_str_enc);
- printf("ID_MODEL_ID=%s\n", product_id);
- printf("ID_REVISION=%s\n", revision_str);
- printf("ID_SERIAL=%s\n", serial);
- if (serial_str[0] != '\0')
- printf("ID_SERIAL_SHORT=%s\n", serial_str);
- if (type_str[0] != '\0')
- printf("ID_TYPE=%s\n", type_str);
- if (instance_str[0] != '\0')
- printf("ID_INSTANCE=%s\n", instance_str);
- printf("ID_BUS=usb\n");
- if (packed_if_str[0] != '\0')
- printf("ID_USB_INTERFACES=:%s\n", packed_if_str);
- if (ifnum != NULL)
- printf("ID_USB_INTERFACE_NUM=%s\n", ifnum);
- if (driver != NULL)
- printf("ID_USB_DRIVER=%s\n", driver);
- } else
- printf("%s\n", serial);
- }
-
-exit:
- udev_device_unref(dev);
- udev_unref(udev);
- logging_close();
- return retval;
-}
~ianmdlvl / elogind.git / blobdiff