458 lines
11 KiB
C
458 lines
11 KiB
C
/*
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* usb_id - identify an USB device
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*
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* Copyright (c) 2005 SUSE Linux Products GmbH, Germany
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*
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* Author:
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* Hannes Reinecke <hare@suse.de>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation version 2 of the License.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <unistd.h>
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#include <string.h>
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#include <ctype.h>
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#include <errno.h>
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#include <getopt.h>
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#include "../../udev/udev.h"
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int debug;
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static void log_fn(struct udev *udev, int priority,
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const char *file, int line, const char *fn,
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const char *format, va_list args)
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{
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if (debug) {
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fprintf(stderr, "%s: ", fn != NULL ? fn : file);
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vfprintf(stderr, format, args);
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} else {
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vsyslog(priority, format, args);
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}
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}
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static char vendor_str[64];
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static char model_str[64];
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static char serial_str[UTIL_NAME_SIZE];
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static char revision_str[64];
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static char type_str[64];
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static char instance_str[64];
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static int use_usb_info;
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static int use_num_info;
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static void set_usb_iftype(char *to, int if_class_num, size_t len)
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{
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char *type = "generic";
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switch (if_class_num) {
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case 1:
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type = "audio";
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break;
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case 3:
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type = "hid";
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break;
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case 7:
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type = "printer";
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break;
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case 8:
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type = "storage";
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break;
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case 2: /* CDC-Control */
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break;
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case 5: /* Physical */
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break;
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case 6: /* Image */
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break;
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case 9: /* HUB */
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break;
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case 0x0a: /* CDC-Data */
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break;
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case 0x0b: /* Chip/Smart Card */
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break;
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case 0x0d: /* Content Security */
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break;
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case 0x0e:
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type = "video";
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break;
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case 0xdc: /* Diagnostic Device */
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break;
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case 0xe0: /* Wireless Controller */
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break;
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case 0xf2: /* Application-specific */
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break;
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case 0xff: /* Vendor-specific */
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break;
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default:
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break;
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}
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strncpy(to, type, len);
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to[len-1] = '\0';
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}
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static int set_usb_mass_storage_ifsubtype(char *to, const char *from, size_t len)
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{
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int type_num = 0;
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char *eptr;
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char *type = "generic";
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type_num = strtoul(from, &eptr, 0);
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if (eptr != from) {
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switch (type_num) {
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case 2:
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type = "cd";
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break;
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case 3:
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type = "tape";
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break;
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case 4: /* UFI */
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case 5: /* SFF-8070i */
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type = "floppy";
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break;
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case 1: /* RBC devices */
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type = "rbc";
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break;
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case 6: /* Transparent SPC-2 devices */
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type = "scsi";
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break;
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default:
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break;
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}
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}
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util_strlcpy(to, type, len);
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return type_num;
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}
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static void set_scsi_type(char *to, const char *from, size_t len)
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{
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int type_num;
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char *eptr;
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char *type = "generic";
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type_num = strtoul(from, &eptr, 0);
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if (eptr != from) {
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switch (type_num) {
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case 0:
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case 0xe:
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type = "disk";
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break;
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case 1:
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type = "tape";
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break;
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case 4:
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case 7:
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case 0xf:
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type = "optical";
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break;
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case 5:
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type = "cd";
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break;
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default:
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break;
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}
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}
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util_strlcpy(to, type, len);
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}
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/*
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* A unique USB identification is generated like this:
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*
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* 1.) Get the USB device type from DeviceClass, InterfaceClass
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* and InterfaceSubClass
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* 2.) If the device type is 'Mass-Storage/SPC-2' or 'Mass-Storage/RBC'
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* use the SCSI vendor and model as USB-Vendor and USB-model.
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* 3.) Otherwise use the USB manufacturer and product as
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* USB-Vendor and USB-model. Any non-printable characters
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* in those strings will be skipped; a slash '/' will be converted
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* into a full stop '.'.
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* 4.) If that fails, too, we will use idVendor and idProduct
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* as USB-Vendor and USB-model.
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* 5.) The USB identification is the USB-vendor and USB-model
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* string concatenated with an underscore '_'.
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* 6.) If the device supplies a serial number, this number
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* is concatenated with the identification with an underscore '_'.
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*/
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static int usb_id(struct udev_device *dev)
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{
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struct udev *udev = udev_device_get_udev(dev);
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struct udev_device *dev_interface;
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struct udev_device *dev_usb;
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const char *if_class, *if_subclass;
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int if_class_num;
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int protocol = 0;
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dbg(udev, "syspath %s\n", udev_device_get_syspath(dev));
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/* usb interface directory */
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dev_interface = udev_device_get_parent_with_subsystem(dev, "usb");
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if (dev_interface == NULL) {
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info(udev, "unable to access usb_interface device of '%s'\n",
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udev_device_get_syspath(dev));
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return 1;
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}
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if_class = udev_device_get_sysattr_value(dev_interface, "bInterfaceClass");
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if (!if_class) {
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info(udev, "%s: cannot get bInterfaceClass attribute\n",
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udev_device_get_sysname(dev));
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return 1;
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}
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if_class_num = strtoul(if_class, NULL, 16);
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if (if_class_num == 8) {
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if_subclass = udev_device_get_sysattr_value(dev_interface, "bInterfaceSubClass");
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if (if_subclass != NULL)
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protocol = set_usb_mass_storage_ifsubtype(type_str, if_subclass, sizeof(type_str)-1);
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} else {
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set_usb_iftype(type_str, if_class_num, sizeof(type_str)-1);
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}
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info(udev, "%s: if_class %d protocol %d\n",
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udev_device_get_syspath(dev_interface), if_class_num, protocol);
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/* usb device directory */
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dev_usb = udev_device_get_parent_with_subsystem(dev_interface, "usb");
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if (!dev_usb) {
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info(udev, "unable to find parent 'usb' device of '%s'\n",
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udev_device_get_syspath(dev));
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return 1;
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}
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/* mass storage */
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if (protocol == 6 && !use_usb_info) {
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struct udev_device *dev_scsi;
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const char *scsi_model, *scsi_vendor, *scsi_type, *scsi_rev;
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int host, bus, target, lun;
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/* get scsi device */
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dev_scsi = udev_device_get_parent_with_subsystem(dev, "scsi");
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if (dev_scsi == NULL) {
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info(udev, "unable to find parent 'scsi' device of '%s'\n",
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udev_device_get_syspath(dev));
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goto fallback;
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}
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if (sscanf(udev_device_get_sysname(dev_scsi), "%d:%d:%d:%d", &host, &bus, &target, &lun) != 4) {
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info(udev, "invalid scsi device '%s'\n", udev_device_get_sysname(dev_scsi));
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goto fallback;
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}
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/* Generic SPC-2 device */
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scsi_vendor = udev_device_get_sysattr_value(dev_scsi, "vendor");
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if (!scsi_vendor) {
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info(udev, "%s: cannot get SCSI vendor attribute\n",
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udev_device_get_sysname(dev_scsi));
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goto fallback;
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}
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udev_util_replace_whitespace(scsi_vendor, vendor_str, sizeof(vendor_str)-1);
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udev_util_replace_chars(vendor_str, NULL);
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scsi_model = udev_device_get_sysattr_value(dev_scsi, "model");
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if (!scsi_model) {
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info(udev, "%s: cannot get SCSI model attribute\n",
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udev_device_get_sysname(dev_scsi));
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goto fallback;
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}
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udev_util_replace_whitespace(scsi_model, model_str, sizeof(model_str)-1);
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udev_util_replace_chars(model_str, NULL);
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scsi_type = udev_device_get_sysattr_value(dev_scsi, "type");
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if (!scsi_type) {
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info(udev, "%s: cannot get SCSI type attribute\n",
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udev_device_get_sysname(dev_scsi));
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goto fallback;
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}
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set_scsi_type(type_str, scsi_type, sizeof(type_str)-1);
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scsi_rev = udev_device_get_sysattr_value(dev_scsi, "rev");
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if (!scsi_rev) {
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info(udev, "%s: cannot get SCSI revision attribute\n",
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udev_device_get_sysname(dev_scsi));
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goto fallback;
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}
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udev_util_replace_whitespace(scsi_rev, revision_str, sizeof(revision_str)-1);
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udev_util_replace_chars(revision_str, NULL);
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/*
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* some broken devices have the same identifiers
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* for all luns, export the target:lun number
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*/
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sprintf(instance_str, "%d:%d", target, lun);
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}
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fallback:
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/* fallback to USB vendor & device */
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if (vendor_str[0] == '\0') {
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const char *usb_vendor = NULL;
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if (!use_num_info)
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usb_vendor = udev_device_get_sysattr_value(dev_usb, "manufacturer");
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if (!usb_vendor)
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usb_vendor = udev_device_get_sysattr_value(dev_usb, "idVendor");
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if (!usb_vendor) {
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info(udev, "No USB vendor information available\n");
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return 1;
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}
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udev_util_replace_whitespace(usb_vendor, vendor_str, sizeof(vendor_str)-1);
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udev_util_replace_chars(vendor_str, NULL);
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}
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if (model_str[0] == '\0') {
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const char *usb_model = NULL;
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if (!use_num_info)
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usb_model = udev_device_get_sysattr_value(dev_usb, "product");
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if (!usb_model)
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usb_model = udev_device_get_sysattr_value(dev_usb, "idProduct");
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if (!usb_model) {
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dbg(udev, "No USB model information available\n");
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return 1;
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}
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udev_util_replace_whitespace(usb_model, model_str, sizeof(model_str)-1);
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udev_util_replace_chars(model_str, NULL);
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}
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if (revision_str[0] == '\0') {
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const char *usb_rev;
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usb_rev = udev_device_get_sysattr_value(dev_usb, "bcdDevice");
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if (usb_rev) {
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udev_util_replace_whitespace(usb_rev, revision_str, sizeof(revision_str)-1);
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udev_util_replace_chars(revision_str, NULL);
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}
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}
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if (serial_str[0] == '\0') {
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const char *usb_serial;
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usb_serial = udev_device_get_sysattr_value(dev_usb, "serial");
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if (usb_serial) {
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udev_util_replace_whitespace(usb_serial, serial_str, sizeof(serial_str)-1);
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udev_util_replace_chars(serial_str, NULL);
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}
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}
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return 0;
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}
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int main(int argc, char **argv)
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{
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static const struct option options[] = {
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{ "usb-info", no_argument, NULL, 'u' },
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{ "num-info", no_argument, NULL, 'n' },
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{ "export", no_argument, NULL, 'x' },
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{ "debug", no_argument, NULL, 'd' },
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{ "help", no_argument, NULL, 'h' },
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{}
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};
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struct udev *udev;
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struct udev_device *dev = NULL;
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char syspath[UTIL_PATH_SIZE];
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const char *devpath;
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static int export;
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int retval = 0;
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udev = udev_new();
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if (udev == NULL)
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goto exit;
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logging_init("usb_id");
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udev_set_log_fn(udev, log_fn);
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while (1) {
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int option;
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option = getopt_long(argc, argv, "dnuxh", options, NULL);
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if (option == -1)
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break;
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switch (option) {
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case 'd':
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debug = 1;
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if (udev_get_log_priority(udev) < LOG_INFO)
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udev_set_log_priority(udev, LOG_INFO);
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break;
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case 'n':
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use_num_info = 1;
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use_usb_info = 1;
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break;
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case 'u':
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use_usb_info = 1;
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break;
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case 'x':
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export = 1;
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break;
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case 'h':
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printf("Usage: usb_id [--usb-info] [--num-info] [--export] [--help] <devpath>\n"
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" --usb-info use usb strings instead\n"
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" --num-info use numerical values\n"
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" --export print values as environemt keys\n"
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" --help print this help text\n\n");
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default:
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retval = 1;
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goto exit;
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}
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}
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devpath = getenv("DEVPATH");
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if (devpath == NULL)
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devpath = argv[optind];
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if (devpath == NULL) {
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fprintf(stderr, "No device specified\n");
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retval = 1;
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goto exit;
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}
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util_strlcpy(syspath, udev_get_sys_path(udev), sizeof(syspath));
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util_strlcat(syspath, devpath, sizeof(syspath));
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dev = udev_device_new_from_syspath(udev, syspath);
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if (dev == NULL) {
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err(udev, "unable to access '%s'\n", devpath);
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return 1;
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}
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retval = usb_id(dev);
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if (retval == 0) {
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char serial[256];
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util_strlcpy(serial, vendor_str, sizeof(serial));
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util_strlcat(serial, "_", sizeof(serial));
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util_strlcat(serial, model_str, sizeof(serial));
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if (serial_str[0] != '\0') {
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util_strlcat(serial, "_", sizeof(serial));
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util_strlcat(serial, serial_str, sizeof(serial));
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}
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if (instance_str[0] != '\0') {
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util_strlcat(serial, "-", sizeof(serial));
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util_strlcat(serial, instance_str, sizeof(serial));
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}
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if (export) {
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printf("ID_VENDOR=%s\n", vendor_str);
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printf("ID_MODEL=%s\n", model_str);
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printf("ID_REVISION=%s\n", revision_str);
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printf("ID_SERIAL=%s\n", serial);
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if (serial_str[0] != '\0')
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printf("ID_SERIAL_SHORT=%s\n", serial_str);
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printf("ID_TYPE=%s\n", type_str);
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if (instance_str[0] != '\0')
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printf("ID_INSTANCE=%s\n", instance_str);
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printf("ID_BUS=usb\n");
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} else
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printf("%s\n", serial);
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}
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exit:
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udev_device_unref(dev);
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udev_unref(udev);
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logging_close();
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return retval;
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}
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