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-rw-r--r--src/udev/udev-builtin-usb_id.c490
1 files changed, 490 insertions, 0 deletions
diff --git a/src/udev/udev-builtin-usb_id.c b/src/udev/udev-builtin-usb_id.c
new file mode 100644
index 0000000..847c2b8
--- /dev/null
+++ b/src/udev/udev-builtin-usb_id.c
@@ -0,0 +1,490 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * USB device properties and persistent device path
+ *
+ * Copyright (c) 2005 SUSE Linux Products GmbH, Germany
+ * Author: Hannes Reinecke <hare@suse.de>
+ */
+
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <unistd.h>
+
+#include "alloc-util.h"
+#include "device-nodes.h"
+#include "device-util.h"
+#include "fd-util.h"
+#include "parse-util.h"
+#include "string-util.h"
+#include "strxcpyx.h"
+#include "udev-builtin.h"
+#include "udev-util.h"
+
+static void set_usb_iftype(char *to, int if_class_num, size_t len) {
+ const 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;
+ const char *type = "generic";
+
+ if (safe_atoi(from, &type_num) >= 0) {
+ switch (type_num) {
+ case 1: /* RBC devices */
+ type = "rbc";
+ break;
+ case 2:
+ type = "atapi";
+ break;
+ case 3:
+ type = "tape";
+ break;
+ case 4: /* UFI */
+ type = "floppy";
+ break;
+ case 6: /* Transparent SPC-2 devices */
+ type = "scsi";
+ break;
+ default:
+ break;
+ }
+ }
+ strscpy(to, len, type);
+ return type_num;
+}
+
+static void set_scsi_type(char *to, const char *from, size_t len) {
+ unsigned type_num;
+ const char *type = "generic";
+
+ if (safe_atou(from, &type_num) >= 0) {
+ 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;
+ }
+ }
+ strscpy(to, len, type);
+}
+
+#define USB_DT_DEVICE 0x01
+#define USB_DT_INTERFACE 0x04
+
+static int dev_if_packed_info(sd_device *dev, char *ifs_str, size_t len) {
+ _cleanup_close_ int fd = -1;
+ ssize_t size;
+ unsigned char buf[18 + 65535];
+ size_t pos = 0;
+ unsigned strpos = 0;
+ const char *filename, *syspath;
+ int r;
+ struct usb_interface_descriptor {
+ uint8_t bLength;
+ uint8_t bDescriptorType;
+ uint8_t bInterfaceNumber;
+ uint8_t bAlternateSetting;
+ uint8_t bNumEndpoints;
+ uint8_t bInterfaceClass;
+ uint8_t bInterfaceSubClass;
+ uint8_t bInterfaceProtocol;
+ uint8_t iInterface;
+ } _packed_;
+
+ r = sd_device_get_syspath(dev, &syspath);
+ if (r < 0)
+ return r;
+
+ filename = strjoina(syspath, "/descriptors");
+ fd = open(filename, O_RDONLY|O_CLOEXEC|O_NOCTTY);
+ if (fd < 0)
+ return log_device_debug_errno(dev, errno, "Failed to open \"%s\": %m", filename);
+
+ size = read(fd, buf, sizeof(buf));
+ if (size < 18)
+ return log_device_warning_errno(dev, SYNTHETIC_ERRNO(EIO),
+ "Short read from \"%s\"", filename);
+ assert((size_t) size <= sizeof buf);
+
+ ifs_str[0] = '\0';
+ while (pos + sizeof(struct usb_interface_descriptor) < (size_t) size &&
+ strpos + 7 < len - 2) {
+
+ struct usb_interface_descriptor *desc;
+ char if_str[8];
+
+ desc = (struct usb_interface_descriptor *) (buf + pos);
+ if (desc->bLength < 3)
+ break;
+ if (desc->bLength > size - sizeof(struct usb_interface_descriptor))
+ return log_device_debug_errno(dev, SYNTHETIC_ERRNO(EIO),
+ "Corrupt data read from \"%s\"", filename);
+ 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))
+ continue;
+
+ memcpy(&ifs_str[strpos], if_str, 8),
+ strpos += 7;
+ }
+
+ if (strpos > 0) {
+ ifs_str[strpos++] = ':';
+ ifs_str[strpos++] = '\0';
+ }
+
+ 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(sd_device *dev, sd_netlink **rtnl, 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[UDEV_NAME_SIZE] = "";
+ char packed_if_str[UDEV_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];
+
+ sd_device *dev_interface, *dev_usb;
+ const char *if_class, *if_subclass;
+ unsigned if_class_num;
+ int protocol = 0;
+ size_t l;
+ char *s;
+
+ const char *syspath, *sysname, *devtype, *interface_syspath;
+ int r;
+
+ assert(dev);
+
+ r = sd_device_get_syspath(dev, &syspath);
+ if (r < 0)
+ return r;
+
+ r = sd_device_get_sysname(dev, &sysname);
+ if (r < 0)
+ return r;
+
+ /* shortcut, if we are called directly for a "usb_device" type */
+ if (sd_device_get_devtype(dev, &devtype) >= 0 && streq(devtype, "usb_device")) {
+ dev_if_packed_info(dev, packed_if_str, sizeof(packed_if_str));
+ dev_usb = dev;
+ goto fallback;
+ }
+
+ /* usb interface directory */
+ r = sd_device_get_parent_with_subsystem_devtype(dev, "usb", "usb_interface", &dev_interface);
+ if (r < 0)
+ return log_device_debug_errno(dev, r, "Failed to access usb_interface: %m");
+
+ r = sd_device_get_syspath(dev_interface, &interface_syspath);
+ if (r < 0)
+ return log_device_debug_errno(dev_interface, r, "Failed to get syspath: %m");
+ (void) sd_device_get_sysattr_value(dev_interface, "bInterfaceNumber", &ifnum);
+ (void) sd_device_get_sysattr_value(dev_interface, "driver", &driver);
+
+ r = sd_device_get_sysattr_value(dev_interface, "bInterfaceClass", &if_class);
+ if (r < 0)
+ return log_device_debug_errno(dev_interface, r, "Failed to get bInterfaceClass attribute: %m");
+
+ r = safe_atou_full(if_class, 16, &if_class_num);
+ if (r < 0)
+ return log_device_debug_errno(dev_interface, r, "Failed to parse if_class: %m");
+ if (if_class_num == 8) {
+ /* mass storage */
+ if (sd_device_get_sysattr_value(dev_interface, "bInterfaceSubClass", &if_subclass) >= 0)
+ 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_device_debug(dev_interface, "if_class:%u protocol:%i", if_class_num, protocol);
+
+ /* usb device directory */
+ r = sd_device_get_parent_with_subsystem_devtype(dev_interface, "usb", "usb_device", &dev_usb);
+ if (r < 0)
+ return log_device_debug_errno(dev_interface, r, "Failed to find parent 'usb' device");
+
+ /* 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 (IN_SET(protocol, 6, 2)) {
+ sd_device *dev_scsi;
+ const char *scsi_sysname, *scsi_model, *scsi_vendor, *scsi_type, *scsi_rev;
+ int host, bus, target, lun;
+
+ /* get scsi device */
+ r = sd_device_get_parent_with_subsystem_devtype(dev, "scsi", "scsi_device", &dev_scsi);
+ if (r < 0) {
+ log_device_debug_errno(dev, r, "Unable to find parent SCSI device");
+ goto fallback;
+ }
+ if (sd_device_get_sysname(dev_scsi, &scsi_sysname) < 0)
+ goto fallback;
+ if (sscanf(scsi_sysname, "%d:%d:%d:%d", &host, &bus, &target, &lun) != 4) {
+ log_device_debug(dev_scsi, "Invalid SCSI device");
+ goto fallback;
+ }
+
+ /* Generic SPC-2 device */
+ r = sd_device_get_sysattr_value(dev_scsi, "vendor", &scsi_vendor);
+ if (r < 0) {
+ log_device_debug_errno(dev_scsi, r, "Failed to get SCSI vendor attribute: %m");
+ goto fallback;
+ }
+ encode_devnode_name(scsi_vendor, vendor_str_enc, sizeof(vendor_str_enc));
+ udev_replace_whitespace(scsi_vendor, vendor_str, sizeof(vendor_str)-1);
+ udev_replace_chars(vendor_str, NULL);
+
+ r = sd_device_get_sysattr_value(dev_scsi, "model", &scsi_model);
+ if (r < 0) {
+ log_device_debug_errno(dev_scsi, r, "Failed to get SCSI model attribute: %m");
+ goto fallback;
+ }
+ encode_devnode_name(scsi_model, model_str_enc, sizeof(model_str_enc));
+ udev_replace_whitespace(scsi_model, model_str, sizeof(model_str)-1);
+ udev_replace_chars(model_str, NULL);
+
+ r = sd_device_get_sysattr_value(dev_scsi, "type", &scsi_type);
+ if (r < 0) {
+ log_device_debug_errno(dev_scsi, r, "Failed to get SCSI type attribute: %m");
+ goto fallback;
+ }
+ set_scsi_type(type_str, scsi_type, sizeof(type_str)-1);
+
+ r = sd_device_get_sysattr_value(dev_scsi, "rev", &scsi_rev);
+ if (r < 0) {
+ log_device_debug_errno(dev_scsi, r, "Failed to get SCSI revision attribute: %m");
+ goto fallback;
+ }
+ udev_replace_whitespace(scsi_rev, revision_str, sizeof(revision_str)-1);
+ udev_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:
+ r = sd_device_get_sysattr_value(dev_usb, "idVendor", &vendor_id);
+ if (r < 0)
+ return log_device_debug_errno(dev_usb, r, "Failed to get idVendor attribute: %m");
+
+ r = sd_device_get_sysattr_value(dev_usb, "idProduct", &product_id);
+ if (r < 0)
+ return log_device_debug_errno(dev_usb, r, "Failed to get idProduct attribute: %m");
+
+ /* fall back to USB vendor & device */
+ if (vendor_str[0] == '\0') {
+ const char *usb_vendor;
+
+ if (sd_device_get_sysattr_value(dev_usb, "manufacturer", &usb_vendor) < 0)
+ usb_vendor = vendor_id;
+ encode_devnode_name(usb_vendor, vendor_str_enc, sizeof(vendor_str_enc));
+ udev_replace_whitespace(usb_vendor, vendor_str, sizeof(vendor_str)-1);
+ udev_replace_chars(vendor_str, NULL);
+ }
+
+ if (model_str[0] == '\0') {
+ const char *usb_model;
+
+ if (sd_device_get_sysattr_value(dev_usb, "product", &usb_model) < 0)
+ usb_model = product_id;
+ encode_devnode_name(usb_model, model_str_enc, sizeof(model_str_enc));
+ udev_replace_whitespace(usb_model, model_str, sizeof(model_str)-1);
+ udev_replace_chars(model_str, NULL);
+ }
+
+ if (revision_str[0] == '\0') {
+ const char *usb_rev;
+
+ if (sd_device_get_sysattr_value(dev_usb, "bcdDevice", &usb_rev) >= 0) {
+ udev_replace_whitespace(usb_rev, revision_str, sizeof(revision_str)-1);
+ udev_replace_chars(revision_str, NULL);
+ }
+ }
+
+ if (serial_str[0] == '\0') {
+ const char *usb_serial;
+
+ if (sd_device_get_sysattr_value(dev_usb, "serial", &usb_serial) >= 0) {
+ /* http://msdn.microsoft.com/en-us/library/windows/hardware/gg487321.aspx */
+ for (const unsigned char *p = (unsigned char*) usb_serial; *p != '\0'; p++)
+ if (*p < 0x20 || *p > 0x7f || *p == ',') {
+ usb_serial = NULL;
+ break;
+ }
+
+ if (usb_serial) {
+ udev_replace_whitespace(usb_serial, serial_str, sizeof(serial_str)-1);
+ udev_replace_chars(serial_str, NULL);
+ }
+ }
+ }
+
+ s = serial;
+ l = strpcpyl(&s, sizeof(serial), vendor_str, "_", model_str, NULL);
+ if (!isempty(serial_str))
+ l = strpcpyl(&s, l, "_", serial_str, NULL);
+
+ if (!isempty(instance_str))
+ strpcpyl(&s, l, "-", instance_str, NULL);
+
+ if (sd_device_get_property_value(dev, "ID_BUS", NULL) >= 0)
+ log_device_debug(dev, "ID_BUS property is already set, setting only properties prefixed with \"ID_USB_\".");
+ else {
+ udev_builtin_add_property(dev, test, "ID_BUS", "usb");
+
+ 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_SERIAL", serial);
+ if (!isempty(serial_str))
+ udev_builtin_add_property(dev, test, "ID_SERIAL_SHORT", serial_str);
+
+ 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_REVISION", revision_str);
+
+ if (!isempty(type_str))
+ udev_builtin_add_property(dev, test, "ID_TYPE", type_str);
+
+ if (!isempty(instance_str))
+ udev_builtin_add_property(dev, test, "ID_INSTANCE", instance_str);
+ }
+
+ /* Also export the same values in the above by prefixing ID_USB_. */
+ udev_builtin_add_property(dev, test, "ID_USB_MODEL", model_str);
+ udev_builtin_add_property(dev, test, "ID_USB_MODEL_ENC", model_str_enc);
+ udev_builtin_add_property(dev, test, "ID_USB_MODEL_ID", product_id);
+ udev_builtin_add_property(dev, test, "ID_USB_SERIAL", serial);
+ if (!isempty(serial_str))
+ udev_builtin_add_property(dev, test, "ID_USB_SERIAL_SHORT", serial_str);
+
+ udev_builtin_add_property(dev, test, "ID_USB_VENDOR", vendor_str);
+ udev_builtin_add_property(dev, test, "ID_USB_VENDOR_ENC", vendor_str_enc);
+ udev_builtin_add_property(dev, test, "ID_USB_VENDOR_ID", vendor_id);
+
+ udev_builtin_add_property(dev, test, "ID_USB_REVISION", revision_str);
+
+ if (!isempty(type_str))
+ udev_builtin_add_property(dev, test, "ID_USB_TYPE", type_str);
+
+ if (!isempty(instance_str))
+ udev_builtin_add_property(dev, test, "ID_USB_INSTANCE", instance_str);
+
+ if (!isempty(packed_if_str))
+ udev_builtin_add_property(dev, test, "ID_USB_INTERFACES", packed_if_str);
+ if (ifnum)
+ udev_builtin_add_property(dev, test, "ID_USB_INTERFACE_NUM", ifnum);
+ if (driver)
+ udev_builtin_add_property(dev, test, "ID_USB_DRIVER", driver);
+ return 0;
+}
+
+const UdevBuiltin udev_builtin_usb_id = {
+ .name = "usb_id",
+ .cmd = builtin_usb_id,
+ .help = "USB device properties",
+ .run_once = true,
+};
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-23 16:05:49 +0000