static int names_usb(struct udev_device *dev, struct netnames *names) { struct udev_device *usbdev; char name[256]; char *ports; char *config; char *interf; size_t l; char *s; usbdev = udev_device_get_parent_with_subsystem_devtype(dev, "usb", "usb_interface"); if (!usbdev) return -ENOENT; /* get USB port number chain, configuration, interface */ util_strscpy(name, sizeof(name), udev_device_get_sysname(usbdev)); s = strchr(name, '-'); if (!s) return -EINVAL; ports = s+1; s = strchr(ports, ':'); if (!s) return -EINVAL; s[0] = '\0'; config = s+1; s = strchr(config, '.'); if (!s) return -EINVAL; s[0] = '\0'; interf = s+1; /* prefix every port number in the chain with "u"*/ s = ports; while ((s = strchr(s, '.'))) s[0] = 'u'; s = names->usb_ports; l = util_strpcpyl(&s, sizeof(names->usb_ports), "u", ports, NULL); /* append USB config number, suppress the common config == 1 */ if (!streq(config, "1")) l = util_strpcpyl(&s, sizeof(names->usb_ports), "c", config, NULL); /* append USB interface number, suppress the interface == 0 */ if (!streq(interf, "0")) l = util_strpcpyl(&s, sizeof(names->usb_ports), "i", interf, NULL); if (l == 0) return -ENAMETOOLONG; names->type = NET_USB; 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(struct udev_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]; 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; size_t l; char *s; vendor_str[0] = '\0'; model_str[0] = '\0'; serial_str[0] = '\0'; packed_if_str[0] = '\0'; revision_str[0] = '\0'; type_str[0] = '\0'; instance_str[0] = '\0'; /* 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) { log_debug("unable to access usb_interface device of '%s'\n", udev_device_get_syspath(dev)); return EXIT_FAILURE; } 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) { log_debug("%s: cannot get bInterfaceClass attribute\n", udev_device_get_sysname(dev)); return EXIT_FAILURE; } 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); } log_debug("%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) { log_debug("unable to find parent 'usb' device of '%s'\n", udev_device_get_syspath(dev)); return EXIT_FAILURE; } /* 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)) { 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) { log_debug("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) { log_debug("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) { log_debug("%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)); util_replace_whitespace(scsi_vendor, vendor_str, sizeof(vendor_str)-1); util_replace_chars(vendor_str, NULL); scsi_model = udev_device_get_sysattr_value(dev_scsi, "model"); if (!scsi_model) { log_debug("%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)); util_replace_whitespace(scsi_model, model_str, sizeof(model_str)-1); util_replace_chars(model_str, NULL); scsi_type = udev_device_get_sysattr_value(dev_scsi, "type"); if (!scsi_type) { log_debug("%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) { log_debug("%s: cannot get SCSI revision attribute\n", udev_device_get_sysname(dev_scsi)); 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: 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; usb_vendor = udev_device_get_sysattr_value(dev_usb, "manufacturer"); if (!usb_vendor) usb_vendor = vendor_id; if (!usb_vendor) { log_debug("No USB vendor information available\n"); return EXIT_FAILURE; } 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 = NULL; usb_model = udev_device_get_sysattr_value(dev_usb, "product"); if (!usb_model) usb_model = product_id; if (!usb_model) return EXIT_FAILURE; 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; usb_rev = udev_device_get_sysattr_value(dev_usb, "bcdDevice"); if (usb_rev) { 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; usb_serial = udev_device_get_sysattr_value(dev_usb, "serial"); if (usb_serial) { util_replace_whitespace(usb_serial, serial_str, sizeof(serial_str)-1); util_replace_chars(serial_str, NULL); } } 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); 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 (serial_str[0] != '\0') udev_builtin_add_property(dev, test, "ID_SERIAL_SHORT", serial_str); if (type_str[0] != '\0') udev_builtin_add_property(dev, test, "ID_TYPE", type_str); if (instance_str[0] != '\0') udev_builtin_add_property(dev, test, "ID_INSTANCE", instance_str); udev_builtin_add_property(dev, test, "ID_BUS", "usb"); if (packed_if_str[0] != '\0') udev_builtin_add_property(dev, test, "ID_USB_INTERFACES", packed_if_str); if (ifnum != NULL) udev_builtin_add_property(dev, test, "ID_USB_INTERFACE_NUM", ifnum); if (driver != NULL) udev_builtin_add_property(dev, test, "ID_USB_DRIVER", driver); return EXIT_SUCCESS; }
/* handle "[<SUBSYSTEM>/<KERNEL>]<attribute>" format */ int util_resolve_subsys_kernel(struct udev *udev, const char *string, char *result, size_t maxsize, int read_value) { char temp[UTIL_PATH_SIZE]; char *subsys; char *sysname; struct udev_device *dev; char *attr; if (string[0] != '[') return -1; util_strscpy(temp, sizeof(temp), string); subsys = &temp[1]; sysname = strchr(subsys, '/'); if (sysname == NULL) return -1; sysname[0] = '\0'; sysname = &sysname[1]; attr = strchr(sysname, ']'); if (attr == NULL) return -1; attr[0] = '\0'; attr = &attr[1]; if (attr[0] == '/') attr = &attr[1]; if (attr[0] == '\0') attr = NULL; if (read_value && attr == NULL) return -1; dev = udev_device_new_from_subsystem_sysname(udev, subsys, sysname); if (dev == NULL) return -1; if (read_value) { const char *val; val = udev_device_get_sysattr_value(dev, attr); if (val != NULL) util_strscpy(result, maxsize, val); else result[0] = '\0'; info(udev, "value '[%s/%s]%s' is '%s'\n", subsys, sysname, attr, result); } else { size_t l; char *s; s = result; l = util_strpcpyl(&s, maxsize, udev_device_get_syspath(dev), NULL); if (attr != NULL) util_strpcpyl(&s, l, "/", attr, NULL); info(udev, "path '[%s/%s]%s' is '%s'\n", subsys, sysname, attr, result); } udev_device_unref(dev); return 0; }