-/*
- * usb_id.c
- *
- * Identify an USB (block) 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 <errno.h>
-#include <getopt.h>
-
-#include "../../udev.h"
-
-#define MAX_PATH_LEN 512
-#define MAX_SERIAL_LEN 256
-#define BLKGETSIZE64 _IOR(0x12,114,size_t)
-
-#ifdef USE_LOG
-void log_message(int priority, const char *format, ...)
-{
- va_list args;
- static int udev_log = -1;
-
- if (udev_log == -1) {
- const char *value;
-
- value = getenv("UDEV_LOG");
- if (value)
- udev_log = log_priority(value);
- else
- udev_log = LOG_ERR;
- }
-
- if (priority > udev_log)
- return;
-
- va_start(args, format);
- vsyslog(priority, format, args);
- va_end(args);
-}
-#endif
-
-static char vendor_str[64];
-static char model_str[64];
-static char serial_str[MAX_SERIAL_LEN];
-static char revision_str[64];
-static char type_str[64];
-static char instance_str[64];
-
-static int use_usb_info;
-static int use_num_info;
-
-static void set_str(char *to, const char *from, size_t count)
-{
- size_t i, j, len;
-
- /* strip trailing whitespace */
- len = strnlen(from, count);
- while (len && isspace(from[len-1]))
- len--;
-
- /* strip leading whitespace */
- i = 0;
- while (isspace(from[i]) && (i < len))
- i++;
-
- j = 0;
- while (i < len) {
- /* substitute multiple whitespace */
- if (isspace(from[i])) {
- while (isspace(from[i]))
- i++;
- to[j++] = '_';
- }
- /* Replace '/' with '.' */
- if (from[i] == '/') {
- to[j++] = '.';
- i++;
- continue;
- }
- /* skip non-printable chars */
- if (!isalnum(from[i]) && !ispunct(from[i])) {
- i++;
- continue;
- }
- to[j++] = from[i++];
- }
- to[j] = '\0';
-}
-
-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 3:
- type = "hid";
- break;
- case 7:
- type = "printer";
- break;
- case 8:
- type = "storage";
- break;
- case 2: /* CDC-Control */
- case 5: /* Physical */
- case 6: /* Image */
- case 9: /* HUB */
- case 0x0a: /* CDC-Data */
- case 0x0b: /* Chip/Smart Card */
- case 0x0d: /* Content Security */
- case 0x0e: /* Video */
- case 0xdc: /* Diagnostic Device */
- case 0xe0: /* Wireless Controller */
- case 0xf2: /* Application-specific */
- 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 = "cd";
- break;
- case 3:
- type = "tape";
- break;
- case 4: /* UFI */
- case 5: /* SFF-8070i */
- type = "floppy";
- break;
- case 1: /* RBC devices */
- case 6: /* Transparent SPC-2 devices */
- type = "disk";
- break;
- default:
- break;
- }
- }
- strlcpy(to, type, len);
-
- 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;
- }
- }
- strlcpy(to, type, len);
-}
-
-/*
- * A unique USB identification is generated like this:
- *
- * 1.) Get the USB device type from DeviceClass, 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(const char *devpath)
-{
- struct sysfs_device *dev;
- struct sysfs_device *dev_interface;
- struct sysfs_device *dev_usb;
- const char *scsi_model, *scsi_vendor, *scsi_type, *scsi_rev;
- const char *usb_model = NULL, *usb_vendor = NULL, *usb_rev, *usb_serial;
- const char *if_class, *if_subclass;
- int if_class_num;
- int protocol = 0;
-
- dbg("devpath %s\n", devpath);
-
- /* get all usb specific information: dev_interface, if_class, dev_usb */
- dev = sysfs_device_get(devpath);
- if (dev == NULL) {
- err("unable to access '%s'", devpath);
- return 1;
- }
-
- /* usb interface directory */
- dev_interface = sysfs_device_get_parent_with_subsystem(dev, "usb");
- if (dev_interface == NULL) {
- info("unable to access usb_interface device of '%s'", devpath);
- return 1;
- }
-
- if_class = sysfs_attr_get_value(dev_interface->devpath, "bInterfaceClass");
- if (!if_class) {
- info("%s: cannot get bInterfaceClass attribute", dev_interface->kernel);
- return 1;
- }
- if_class_num = strtoul(if_class, NULL, 16);
- if (if_class_num == 8) {
- if_subclass = sysfs_attr_get_value(dev_interface->devpath, "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("%s: if_class %d protocol %d\n", dev_interface->devpath, if_class_num, protocol);
-
- /* usb device directory */
- dev_usb = sysfs_device_get_parent_with_subsystem(dev_interface, "usb");
- if (!dev_usb) {
- info("unable to find parent 'usb' device of '%s'", devpath);
- return 1;
- }
-
- /* mass storage */
- if (protocol == 6 && !use_usb_info) {
- struct sysfs_device *dev_scsi;
- int host, bus, target, lun;
-
- /* get scsi device */
- dev_scsi = sysfs_device_get_parent_with_subsystem(dev, "scsi");
- if (dev_scsi == NULL) {
- info("unable to find parent 'scsi' device of '%s'", devpath);
- goto fallback;
- }
- if (sscanf(dev_scsi->kernel, "%d:%d:%d:%d", &host, &bus, &target, &lun) != 4) {
- info("invalid scsi device '%s'", dev_scsi->kernel);
- goto fallback;
- }
-
- /* Generic SPC-2 device */
- scsi_vendor = sysfs_attr_get_value(dev_scsi->devpath, "vendor");
- if (!scsi_vendor) {
- info("%s: cannot get SCSI vendor attribute", dev_scsi->kernel);
- goto fallback;
- }
- set_str(vendor_str, scsi_vendor, sizeof(vendor_str)-1);
-
- scsi_model = sysfs_attr_get_value(dev_scsi->devpath, "model");
- if (!scsi_model) {
- info("%s: cannot get SCSI model attribute", dev_scsi->kernel);
- goto fallback;
- }
- set_str(model_str, scsi_model, sizeof(model_str)-1);
-
- scsi_type = sysfs_attr_get_value(dev_scsi->devpath, "type");
- if (!scsi_type) {
- info("%s: cannot get SCSI type attribute", dev_scsi->kernel);
- goto fallback;
- }
- set_scsi_type(type_str, scsi_type, sizeof(type_str)-1);
-
- scsi_rev = sysfs_attr_get_value(dev_scsi->devpath, "rev");
- if (!scsi_rev) {
- info("%s: cannot get SCSI revision attribute", dev_scsi->kernel);
- goto fallback;
- }
- set_str(revision_str, scsi_rev, sizeof(revision_str)-1);
-
- /*
- * some broken devices have the same identifiers
- * for all luns, export the target:lun number
- */
- sprintf(instance_str, "%d:%d", target, lun);
- }
-
-fallback:
- /* Fallback to USB vendor & device */
- if (vendor_str[0] == '\0') {
- if (!use_num_info)
- if (!(usb_vendor = sysfs_attr_get_value(dev_usb->devpath, "manufacturer")))
- dbg("No USB vendor string found, using idVendor");
-
- if (!usb_vendor) {
- if (!(usb_vendor = sysfs_attr_get_value(dev_usb->devpath, "idVendor"))) {
- dbg("No USB vendor information available\n");
- sprintf(vendor_str,"0000");
- }
- }
- set_str(vendor_str,usb_vendor, sizeof(vendor_str) - 1);
- }
-
- if (model_str[0] == '\0') {
- if (!use_num_info)
- if (!(usb_model = sysfs_attr_get_value(dev_usb->devpath, "product")))
- dbg("No USB model string found, using idProduct");
-
- if (!usb_model) {
- if (!(usb_model = sysfs_attr_get_value(dev_usb->devpath, "idProduct")))
- dbg("No USB model information available\n"); sprintf(model_str,"0000");
- }
- set_str(model_str, usb_model, sizeof(model_str) - 1);
- }
-
- if (revision_str[0] == '\0') {
- usb_rev = sysfs_attr_get_value(dev_usb->devpath, "bcdDevice");
- if (usb_rev)
- set_str(revision_str, usb_rev, sizeof(revision_str)-1);
- }
-
- if (serial_str[0] == '\0') {
- usb_serial = sysfs_attr_get_value(dev_usb->devpath, "serial");
- if (usb_serial)
- set_str(serial_str, usb_serial, sizeof(serial_str)-1);
- }
- return 0;
-}
-
-int main(int argc, char **argv)
-{
- int retval = 0;
- const char *env;
- char devpath[MAX_PATH_LEN];
- static int export;
-
- logging_init("usb_id");
- sysfs_init();
-
- static const struct option options[] = {
- { "usb-info", 0, NULL, 'u' },
- { "num-info", 0, NULL, 'n' },
- { "export", 0, NULL, 'x' },
- { "help", 0, NULL, 'h' },
- {}
- };
-
- while (1) {
- int option;
-
- option = getopt_long(argc, argv, "nuxh", options, NULL);
- if (option == -1)
- break;
-
- switch (option) {
- 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]\n"
- " --usb-info use usb strings instead\n"
- " --num-info use numerical values\n"
- " --export print values as environemt keys\n"
- " --help print this help text\n\n");
- default:
- retval = 1;
- goto exit;
- }
- }
-
- env = getenv("DEVPATH");
- if (env != NULL)
- strlcpy(devpath, env, sizeof(devpath));
- else {
- if (argv[optind] == NULL) {
- fprintf(stderr, "No device specified\n");
- retval = 1;
- goto exit;
- }
- strlcpy(devpath, argv[optind], sizeof(devpath));
- }
-
- retval = usb_id(devpath);
-
- if (retval == 0) {
- char serial[256];
-
- strlcpy(serial, vendor_str, sizeof(serial));
- strlcat(serial, "_", sizeof(serial));
- strlcat(serial, model_str, sizeof(serial));
- if (serial_str[0] != '\0') {
- strlcat(serial, "_", sizeof(serial));
- strlcat(serial, serial_str, sizeof(serial));
- }
- if (instance_str[0] != '\0') {
- strlcat(serial, "-", sizeof(serial));
- strlcat(serial, instance_str, sizeof(serial));
- }
-
- if (export) {
- printf("ID_VENDOR=%s\n", vendor_str);
- printf("ID_MODEL=%s\n", model_str);
- 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);
- printf("ID_TYPE=%s\n", type_str);
- if (instance_str[0] != '\0')
- printf("ID_INSTANCE=%s\n", instance_str);
- printf("ID_BUS=usb\n");
- } else
- printf("%s\n", serial);
- }
-
-exit:
- sysfs_cleanup();
- logging_close();
- return retval;
-}
~ianmdlvl / elogind.git / blobdiff