/* * 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 <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 model_str[64]; static char model_str_enc[256]; static char vendor_str_enc[256]; static char serial_str[UTIL_NAME_SIZE]; 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_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_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; } } util_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(struct udev_device *dev) { struct udev *udev = udev_device_get_udev(dev); struct udev_device *dev_interface; struct udev_device *dev_usb; const char *if_class, *if_subclass; int if_class_num; int protocol = 0; dbg(udev, "syspath %s\n", udev_device_get_syspath(dev)); /* 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; } 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; } /* 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: /* 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 = udev_device_get_sysattr_value(dev_usb, "idVendor"); 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 = udev_device_get_sysattr_value(dev_usb, "idProduct"); 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 = getenv("DEVPATH"); if (devpath == NULL) devpath = argv[optind]; if (devpath == NULL) { fprintf(stderr, "No device specified\n"); retval = 1; goto exit; } util_strlcpy(syspath, udev_get_sys_path(udev), sizeof(syspath)); util_strlcat(syspath, devpath, sizeof(syspath)); 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]; util_strlcpy(serial, vendor_str, sizeof(serial)); util_strlcat(serial, "_", sizeof(serial)); util_strlcat(serial, model_str, sizeof(serial)); if (serial_str[0] != '\0') { util_strlcat(serial, "_", sizeof(serial)); util_strlcat(serial, serial_str, sizeof(serial)); } if (instance_str[0] != '\0') { util_strlcat(serial, "-", sizeof(serial)); util_strlcat(serial, instance_str, sizeof(serial)); } if (export) { printf("ID_VENDOR=%s\n", vendor_str); printf("ID_VENDOR_ENC=%s\n", vendor_str_enc); printf("ID_MODEL=%s\n", model_str); printf("ID_MODEL_ENC=%s\n", model_str_enc); 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: udev_device_unref(dev); udev_unref(udev); logging_close(); return retval; }