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-rw-r--r--lsusb-t.c730
1 files changed, 730 insertions, 0 deletions
diff --git a/lsusb-t.c b/lsusb-t.c
new file mode 100644
index 0000000..88b6553
--- /dev/null
+++ b/lsusb-t.c
@@ -0,0 +1,730 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* Copyright (c) 2009 Greg Kroah-Hartman <gregkh@suse.de> */
+#include <stdint.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <dirent.h>
+#include <string.h>
+#include <ctype.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <stddef.h>
+
+#include "list.h"
+#include "lsusb.h"
+#include "names.h"
+
+#define MY_SYSFS_FILENAME_LEN 255
+#define MY_PATH_MAX 4096
+#define MY_PARAM_MAX 64
+
+struct usbinterface {
+ struct list_head list;
+ struct usbinterface *next;
+ struct usbdevice *parent;
+ unsigned int configuration;
+ unsigned int ifnum;
+
+ unsigned int bAlternateSetting;
+ unsigned int bInterfaceClass;
+ unsigned int bInterfaceNumber;
+ unsigned int bInterfaceProtocol;
+ unsigned int bInterfaceSubClass;
+ unsigned int bNumEndpoints;
+
+ char name[MY_SYSFS_FILENAME_LEN];
+ char driver[MY_SYSFS_FILENAME_LEN];
+};
+
+struct usbdevice {
+ struct list_head list; /* connect devices independent of the bus */
+ struct usbdevice *next; /* next port on this hub */
+ struct usbinterface *first_interface; /* list of interfaces */
+ struct usbdevice *first_child; /* connect devices on this port */
+ struct usbdevice *parent; /* hub this device is connected to */
+ unsigned int busnum;
+ unsigned int parent_portnum;
+ unsigned int portnum;
+
+ unsigned int bConfigurationValue;
+ unsigned int bDeviceClass;
+ unsigned int bDeviceProtocol;
+ unsigned int bDeviceSubClass;
+ unsigned int bMaxPacketSize0;
+ char bMaxPower[MY_PARAM_MAX];
+ unsigned int bNumConfigurations;
+ unsigned int bNumInterfaces;
+ unsigned int bcdDevice;
+ unsigned int bmAttributes;
+ unsigned int configuration;
+ unsigned int devnum;
+ unsigned int idProduct;
+ unsigned int idVendor;
+ unsigned int maxchild;
+ char manufacturer[MY_PARAM_MAX];
+ char product[MY_PARAM_MAX];
+ char serial[MY_PARAM_MAX];
+ char version[MY_PARAM_MAX];
+ char speed[MY_PARAM_MAX]; /* '1.5','12','480','5000' + '\n' */
+ unsigned int rx_lanes;
+ unsigned int tx_lanes;
+
+ char name[MY_SYSFS_FILENAME_LEN];
+ char driver[MY_SYSFS_FILENAME_LEN];
+};
+
+struct usbbusnode {
+ struct usbbusnode *next;
+ struct usbinterface *first_interface; /* list of interfaces */
+ struct usbdevice *first_child; /* connect children belonging to this bus */
+ unsigned int busnum;
+
+ unsigned int bDeviceClass;
+ unsigned int devnum;
+ unsigned int idProduct;
+ unsigned int idVendor;
+ unsigned int maxchild;
+ char speed[5 + 1]; /* '1.5','12','480','5000' + '\n' */
+ unsigned int rx_lanes;
+ unsigned int tx_lanes;
+
+ char name[MY_SYSFS_FILENAME_LEN];
+ char driver[MY_SYSFS_FILENAME_LEN];
+};
+
+#define SYSFS_INTu(de,tgt, name) do { tgt->name = read_sysfs_file_int(de,#name,10); } while(0)
+#define SYSFS_INTx(de,tgt, name) do { tgt->name = read_sysfs_file_int(de,#name,16); } while(0)
+#define SYSFS_STR(de,tgt, name) do { read_sysfs_file_string(de, #name, tgt->name, MY_PARAM_MAX); } while(0)
+
+LIST_HEAD(interfacelist);
+LIST_HEAD(usbdevlist);
+static struct usbbusnode *usbbuslist;
+
+static const char sys_bus_usb_devices[] = "/sys/bus/usb/devices";
+static int indent;
+
+#if 0
+static void dump_usbbusnode(struct usbbusnode *b)
+{
+ printf(" B %p:'%u': n %p fi %p fc %p driver '%s'\n", b, b->busnum, b->next, b->first_interface, b->first_child, b->driver);
+}
+
+static void dump_usbdevice(struct usbdevice *d)
+{
+ printf
+ (" D %p:'%s': n %p fi %p fc %p bn %u ppn %u pn %u p %p bCV %u bDC %02x bDP %02x bDSC %02x bMPS %02x bMP '%s' bNC %u bNI %u bcdD %02x bmA %02x c %u dn %u idP %04x idV %04x mc %u m '%s' p '%s' s '%s' v '%s' sp '%s' driver '%s'\n",
+ d, d->name, d->next, d->first_interface, d->first_child, d->busnum, d->parent_portnum, d->portnum, d->parent, d->bConfigurationValue, d->bDeviceClass,
+ d->bDeviceProtocol, d->bDeviceSubClass, d->bMaxPacketSize0, d->bMaxPower, d->bNumConfigurations, d->bNumInterfaces, d->bcdDevice, d->bmAttributes,
+ d->configuration, d->devnum, d->idProduct, d->idVendor, d->maxchild, d->manufacturer, d->product, d->serial, d->version, d->speed, d->driver);
+}
+
+static void dump_usbinterface(struct usbinterface *i)
+{
+ printf(" I %p:'%s': n %p c %u if %u bAS %u bIC %02x bIN %02x bIP %02x bISC %02x bNE %u d '%s'\n", i, i->name, i->next, i->configuration, i->ifnum,
+ i->bAlternateSetting, i->bInterfaceClass, i->bInterfaceNumber, i->bInterfaceProtocol, i->bInterfaceSubClass, i->bNumEndpoints, i->driver);
+}
+#endif
+
+static char tmp_str[128];
+static const char *bDeviceClass_to_str(unsigned int dc)
+{
+ const char *s;
+ switch (dc) {
+ case 9:
+ s = "root_hub";
+ break;
+ default:
+ snprintf(tmp_str, 128, "'bDeviceClass 0x%02x not yet handled'", dc);;
+ s = tmp_str;
+ }
+ return s;
+}
+
+static void lanes_to_str(char *lanes, unsigned int tx, unsigned int rx) {
+ if (tx == rx) {
+ if (tx < 2) {
+ *lanes = '\0';
+ return;
+ }
+ sprintf(lanes, "/x%u", tx);
+ } else {
+ sprintf(lanes, "/Tx%u+Rx%u", tx, rx);
+ }
+}
+
+static void print_usbbusnode(struct usbbusnode *b)
+{
+ char vendor[128], product[128];
+ char lanes[32];
+
+ lanes_to_str(lanes, b->tx_lanes, b->rx_lanes);
+
+ printf("/: Bus %02u.Port %u: Dev %u, Class=%s, Driver=%s/%up, %sM%s\n", b->busnum, 1,
+ b->devnum, bDeviceClass_to_str(b->bDeviceClass), b->driver, b->maxchild, b->speed, lanes);
+ if (verblevel >= 1) {
+ get_vendor_string(vendor, sizeof(vendor), b->idVendor);
+ get_product_string(product, sizeof(product), b->idVendor, b->idProduct);
+ printf(" ID %04x:%04x %s %s\n", b->idVendor, b->idProduct, vendor, product);
+ }
+ if (verblevel >= 2) {
+ printf(" %s/%s /dev/bus/usb/%03d/%03d\n", sys_bus_usb_devices, b->name, b->busnum, b->devnum);
+ }
+}
+
+static void print_usbdevice(struct usbdevice *d, struct usbinterface *i)
+{
+ char subcls[128];
+ char vendor[128], product[128];
+ char lanes[32];
+
+ lanes_to_str(lanes, d->tx_lanes, d->rx_lanes);
+ get_class_string(subcls, sizeof(subcls), i->bInterfaceClass);
+
+ if (i->bInterfaceClass == 9)
+ printf("Port %u: Dev %u, If %u, Class=%s, Driver=%s/%up, %sM%s\n", d->portnum, d->devnum, i->ifnum, subcls,
+ i->driver, d->maxchild, d->speed, lanes);
+ else
+ printf("Port %u: Dev %u, If %u, Class=%s, Driver=%s, %sM%s\n", d->portnum, d->devnum, i->ifnum, subcls, i->driver,
+ d->speed, lanes);
+ if (verblevel >= 1) {
+ printf(" %*s", indent, " ");
+ get_vendor_string(vendor, sizeof(vendor), d->idVendor);
+ get_product_string(product, sizeof(product), d->idVendor, d->idProduct);
+ printf("ID %04x:%04x %s %s\n", d->idVendor, d->idProduct, vendor, product);
+ }
+ if (verblevel >= 2) {
+ printf(" %*s", indent, " ");
+ printf("%s/%s /dev/bus/usb/%03d/%03d\n", sys_bus_usb_devices, d->name, d->busnum, d->devnum);
+ }
+}
+
+static unsigned int read_sysfs_file_int(const char *d_name, const char *file, int base)
+{
+ char buf[12], path[MY_PATH_MAX];
+ int fd;
+ ssize_t r;
+ unsigned long ret;
+ snprintf(path, MY_PATH_MAX, "%s/%s/%s", sys_bus_usb_devices, d_name, file);
+ path[MY_PATH_MAX - 1] = '\0';
+ fd = open(path, O_RDONLY);
+ if (fd < 0)
+ goto error;
+ memset(buf, 0, sizeof(buf));
+ r = read(fd, buf, sizeof(buf) - 1);
+ close(fd);
+ if (r < 0)
+ goto error;
+ buf[sizeof(buf) - 1] = '\0';
+ ret = strtoul(buf, NULL, base);
+ return (unsigned int)ret;
+
+ error:
+ perror(path);
+ return 0;
+}
+
+static void read_sysfs_file_string(const char *d_name, const char *file, char *buf, int len)
+{
+ char path[MY_PATH_MAX];
+ int fd;
+ ssize_t r;
+ fd = snprintf(path, MY_PATH_MAX, "%s/%s/%s", sys_bus_usb_devices, d_name, file);
+ if (fd < 0 || fd >= MY_PATH_MAX)
+ goto error;
+ path[fd] = '\0';
+ fd = open(path, O_RDONLY);
+ if (fd < 0)
+ goto error;
+ r = read(fd, buf, len);
+ close(fd);
+ if (r > 0 && r < len) {
+ buf[r] = '\0';
+ r--;
+ while (r >= 0 && buf[r] == '\n') {
+ buf[r] = '\0';
+ r--;
+ }
+ while (r >= 0) {
+ if (buf[r] == '\n')
+ buf[r] = ' ';
+ r--;
+ }
+ return;
+ }
+ error:
+ buf[0] = '\0';
+}
+
+static void append_dev_interface(struct usbinterface *i, struct usbinterface *new)
+{
+ while (i->next) {
+ if (i == new)
+ return;
+ i = i->next;
+ }
+ if (i == new)
+ return;
+ i->next = new;
+}
+
+static void append_dev_sibling(struct usbdevice *d, struct usbdevice *new)
+{
+ while (d->next)
+ d = d->next;
+ d->next = new;
+}
+
+static void append_businterface(unsigned int busnum, struct usbinterface *new)
+{
+ struct usbbusnode *b = usbbuslist;
+ struct usbinterface *i;
+ while (b) {
+ if (b->busnum == busnum) {
+ i = b->first_interface;
+ if (i) {
+ while (i->next) {
+ if (i == new)
+ return;
+ i = i->next;
+ }
+ if (i == new)
+ return;
+ i->next = new;
+ } else
+ b->first_interface = new;
+ break;
+ }
+ b = b->next;
+ }
+}
+
+static void append_busnode(struct usbbusnode *new)
+{
+ struct usbbusnode *b = usbbuslist;
+ if (b) {
+ while (b->next)
+ b = b->next;
+ b->next = new;
+ } else
+ usbbuslist = new;
+}
+
+static void add_usb_interface(const char *d_name)
+{
+ struct usbinterface *e;
+ const char *p;
+ char *pn, driver[MY_PATH_MAX], link[MY_PATH_MAX];
+ unsigned long i;
+ int l;
+ p = strchr(d_name, ':');
+ p++;
+ i = strtoul(p, &pn, 10);
+ if (!pn || p == pn)
+ return;
+ e = malloc(sizeof(struct usbinterface));
+ if (!e)
+ return;
+ memset(e, 0, sizeof(struct usbinterface));
+ e->configuration = i;
+ p = pn + 1;
+ i = strtoul(p, &pn, 10);
+ if (!pn || p == pn)
+ {
+ free(e);
+ return;
+ }
+ e->ifnum = i;
+ if (snprintf(e->name, MY_SYSFS_FILENAME_LEN, "%s", d_name) >= MY_SYSFS_FILENAME_LEN)
+ printf("warning: '%s' truncated to '%s'\n", d_name, e->name);
+ SYSFS_INTu(d_name, e, bAlternateSetting);
+ SYSFS_INTx(d_name, e, bInterfaceClass);
+ SYSFS_INTx(d_name, e, bInterfaceNumber);
+ SYSFS_INTx(d_name, e, bInterfaceProtocol);
+ SYSFS_INTx(d_name, e, bInterfaceSubClass);
+ SYSFS_INTx(d_name, e, bNumEndpoints);
+ l = snprintf(link, MY_PATH_MAX, "%s/%s/driver", sys_bus_usb_devices, d_name);
+ if (l > 0 && l < MY_PATH_MAX) {
+ l = readlink(link, driver, MY_PATH_MAX);
+ if (l >= 0) {
+ if (l < MY_PATH_MAX - 1)
+ driver[l] = '\0';
+ else
+ driver[0] = '\0';
+ p = strrchr(driver, '/');
+ if (p)
+ snprintf(e->driver, sizeof(e->driver), "%s", p + 1);
+ }
+ } else
+ printf("Can not read driver link for '%s': %d\n", d_name, l);
+ list_add_tail(&e->list, &interfacelist);
+}
+
+static void add_usb_device(const char *d_name)
+{
+ struct usbdevice *d;
+ const char *p;
+ char *pn, driver[MY_PATH_MAX], link[MY_PATH_MAX];
+ unsigned long i;
+ int l;
+ p = d_name;
+ i = strtoul(p, &pn, 10);
+ if (!pn || p == pn)
+ return;
+ d = malloc(sizeof(struct usbdevice));
+ if (!d)
+ return;
+ memset(d, 0, sizeof(struct usbdevice));
+ d->busnum = i;
+ while (*pn) {
+ p = pn + 1;
+ i = strtoul(p, &pn, 10);
+ if (p == pn)
+ break;
+ d->parent_portnum = d->portnum;
+ d->portnum = i;
+ }
+ if (snprintf(d->name, MY_SYSFS_FILENAME_LEN, "%s", d_name) >= MY_SYSFS_FILENAME_LEN)
+ printf("warning: '%s' truncated to '%s'\n", d_name, d->name);
+ SYSFS_INTu(d_name, d, bConfigurationValue);
+ SYSFS_INTx(d_name, d, bDeviceClass);
+ SYSFS_INTx(d_name, d, bDeviceProtocol);
+ SYSFS_INTx(d_name, d, bDeviceSubClass);
+ SYSFS_INTx(d_name, d, bMaxPacketSize0);
+ SYSFS_STR(d_name, d, bMaxPower);
+ SYSFS_INTu(d_name, d, bNumConfigurations);
+ SYSFS_INTx(d_name, d, bNumInterfaces);
+ SYSFS_INTx(d_name, d, bcdDevice);
+ SYSFS_INTx(d_name, d, bmAttributes);
+ SYSFS_INTu(d_name, d, configuration);
+ SYSFS_INTu(d_name, d, devnum);
+ SYSFS_INTx(d_name, d, idProduct);
+ SYSFS_INTx(d_name, d, idVendor);
+ SYSFS_INTu(d_name, d, maxchild);
+ SYSFS_STR(d_name, d, manufacturer);
+ SYSFS_STR(d_name, d, product);
+ SYSFS_STR(d_name, d, serial);
+ SYSFS_STR(d_name, d, version);
+ SYSFS_STR(d_name, d, speed);
+ SYSFS_INTu(d_name, d, rx_lanes);
+ SYSFS_INTu(d_name, d, tx_lanes);
+ l = snprintf(link, MY_PATH_MAX, "%s/%s/driver", sys_bus_usb_devices, d_name);
+ if (l > 0 && l < MY_PATH_MAX) {
+ l = readlink(link, driver, MY_PATH_MAX);
+ if (l >= 0) {
+ if (l < MY_PATH_MAX - 1)
+ driver[l] = '\0';
+ else
+ driver[0] = '\0';
+ p = strrchr(driver, '/');
+ if (p)
+ snprintf(d->driver, sizeof(d->driver), "%s", p + 1);
+ }
+ } else
+ printf("Can not read driver link for '%s': %d\n", d_name, l);
+ list_add_tail(&d->list, &usbdevlist);
+}
+
+static void get_roothub_driver(struct usbbusnode *b, const char *d_name)
+{
+ char *p, path[MY_PATH_MAX], link[MY_PATH_MAX];
+ int l;
+ l = snprintf(link, MY_PATH_MAX, "%s/%s/../driver", sys_bus_usb_devices, d_name);
+ if (l > 0 && l < MY_PATH_MAX) {
+ l = readlink(link, path, MY_PATH_MAX);
+ if (l >= 0) {
+ if (l < MY_PATH_MAX - 1)
+ path[l] = '\0';
+ else
+ path[0] = '\0';
+ p = strrchr(path, '/');
+ if (p)
+ snprintf(b->driver, sizeof(b->driver), "%s", p + 1);
+ }
+ } else
+ printf("Can not read driver link for '%s': %d\n", d_name, l);
+}
+
+static void add_usb_bus(const char *d_name)
+{
+ struct usbbusnode *bus;
+ bus = malloc(sizeof(struct usbbusnode));
+ if (bus) {
+ memset(bus, 0, sizeof(struct usbbusnode));
+ bus->busnum = strtoul(d_name + 3, NULL, 10);
+ if (snprintf(bus->name, MY_SYSFS_FILENAME_LEN, "%s", d_name) >= MY_SYSFS_FILENAME_LEN)
+ printf("warning: '%s' truncated to '%s'\n", d_name, bus->name);
+ SYSFS_INTu(d_name, bus, devnum);
+ SYSFS_INTx(d_name, bus, bDeviceClass);
+ SYSFS_INTx(d_name, bus, idProduct);
+ SYSFS_INTx(d_name, bus, idVendor);
+ SYSFS_INTu(d_name, bus, maxchild);
+ SYSFS_STR(d_name, bus, speed);
+ SYSFS_INTu(d_name, bus, rx_lanes);
+ SYSFS_INTu(d_name, bus, tx_lanes);
+ append_busnode(bus);
+ get_roothub_driver(bus, d_name);
+ }
+}
+
+static void inspect_bus_entry(const char *d_name)
+{
+ if (d_name[0] == '.' && (!d_name[1] || (d_name[1] == '.' && !d_name[2])))
+ return;
+ if (d_name[0] == 'u' && d_name[1] == 's' && d_name[2] == 'b' && isdigit(d_name[3])) {
+ add_usb_bus(d_name);
+ } else if (isdigit(d_name[0])) {
+ if (strchr(d_name, ':'))
+ add_usb_interface(d_name);
+ else
+ add_usb_device(d_name);
+ } else
+ fprintf(stderr, "ignoring '%s'\n", d_name);
+}
+
+static void walk_usb_devices(DIR * sbud)
+{
+ struct dirent *de;
+ while ((de = readdir(sbud)))
+ inspect_bus_entry(de->d_name);
+}
+
+static void assign_dev_to_bus(struct usbdevice *d)
+{
+ struct usbbusnode *b = usbbuslist;
+ while (b) {
+ if (b->busnum == d->busnum) {
+ if (b->first_child)
+ append_dev_sibling(b->first_child, d);
+ else
+ b->first_child = d;
+ }
+ b = b->next;
+ }
+}
+
+static void assign_dev_to_parent(struct usbdevice *d)
+{
+ struct list_head *l;
+ struct usbdevice *pd;
+ char n[MY_SYSFS_FILENAME_LEN], *p;
+ for (l = usbdevlist.next; l != &usbdevlist; l = l->next) {
+ pd = list_entry(l, struct usbdevice, list);
+ if (pd == d)
+ continue;
+ if (pd->busnum == d->busnum && pd->portnum == d->parent_portnum) {
+ strcpy(n, d->name);
+ p = strrchr(n, '.');
+ if (p) {
+ *p = '\0';
+ if (strcmp(n, pd->name)) {
+ continue;
+ }
+ d->parent = pd;
+ if (pd->first_child)
+ append_dev_sibling(pd->first_child, d);
+ else
+ pd->first_child = d;
+ break;
+ }
+ }
+ }
+}
+
+static void assign_interface_to_parent(struct usbdevice *d, struct usbinterface *i)
+{
+ const char *p;
+ char *pn, name[MY_SYSFS_FILENAME_LEN];
+ ptrdiff_t l;
+ unsigned int busnum;
+
+ p = strchr(i->name, ':');
+ if (p) {
+ l = p - i->name;
+ if (l < MY_SYSFS_FILENAME_LEN) {
+ memcpy(name, i->name, l);
+ name[l] = '\0';
+ } else
+ name[0] = '\0';
+ if (strcmp(d->name, name) == 0) {
+ i->parent = d;
+ if (d->first_interface)
+ append_dev_interface(d->first_interface, i);
+ else
+ d->first_interface = i;
+ } else {
+ busnum = strtoul(name, &pn, 10);
+ if (pn && pn != name) {
+ if (p[1] == '0')
+ append_businterface(busnum, i);
+ }
+ }
+ }
+}
+
+static void connect_devices(void)
+{
+ struct list_head *ld, *li;
+ struct usbdevice *d;
+ struct usbinterface *e;
+ for (ld = usbdevlist.next; ld != &usbdevlist; ld = ld->next) {
+ d = list_entry(ld, struct usbdevice, list);
+ if (d->parent_portnum)
+ assign_dev_to_parent(d);
+ else
+ assign_dev_to_bus(d);
+ for (li = interfacelist.next; li != &interfacelist; li = li->next) {
+ e = list_entry(li, struct usbinterface, list);
+ if (!e->parent)
+ assign_interface_to_parent(d, e);
+ }
+ }
+ for (li = interfacelist.next; li != &interfacelist; li = li->next) {
+ e = list_entry(li, struct usbinterface, list);
+ }
+}
+
+static void sort_dev_interfaces(struct usbinterface **i)
+{
+ struct usbinterface *t, *p, **pp;
+ int swapped;
+ p = *i;
+ pp = i;
+ do {
+ p = *i;
+ pp = i;
+ swapped = 0;
+ while (p->next) {
+ if (p->configuration > p->next->configuration) {
+ t = p->next;
+ p->next = t->next;
+ t->next = p;
+ *pp = t;
+ swapped = 1;
+ p = t;
+ }
+ if (p->ifnum > p->next->ifnum) {
+ t = p->next;
+ p->next = t->next;
+ t->next = p;
+ *pp = t;
+ swapped = 1;
+ p = t;
+ }
+ pp = &p->next;
+ p = p->next;
+ }
+ } while (swapped);
+}
+
+static void sort_dev_siblings(struct usbdevice **d)
+{
+ struct usbdevice *t, *p, **pp;
+ int swapped;
+ p = *d;
+ pp = d;
+ if (p->first_child)
+ sort_dev_siblings(&p->first_child);
+ if (p->first_interface)
+ sort_dev_interfaces(&p->first_interface);
+ do {
+ p = *d;
+ pp = d;
+ swapped = 0;
+ while (p->next) {
+ if (p->portnum > p->next->portnum) {
+ t = p->next;
+ p->next = t->next;
+ t->next = p;
+ *pp = t;
+ swapped = 1;
+ p = t;
+ }
+ pp = &p->next;
+ p = p->next;
+ }
+ } while (swapped);
+}
+
+static void sort_devices(void)
+{
+ struct usbbusnode *b = usbbuslist;
+ while (b) {
+ if (b->first_child)
+ sort_dev_siblings(&b->first_child);
+ b = b->next;
+ }
+}
+
+static void sort_busses(void)
+{
+ /* need to reverse sort bus numbers */
+ struct usbbusnode *t, *p, **pp;
+ int swapped;
+ do {
+ p = usbbuslist;
+ if (p == NULL)
+ return;
+ pp = &usbbuslist;
+ swapped = 0;
+ while (p && p->next) {
+ if (p->busnum < p->next->busnum) {
+ t = p->next;
+ p->next = t->next;
+ t->next = p;
+ *pp = t;
+ swapped = 1;
+ p = t;
+ }
+ pp = &p->next;
+ p = p->next;
+ }
+ } while (swapped);
+}
+
+static void print_tree_dev_interface(struct usbdevice *d, struct usbinterface *i)
+{
+ indent += 3;
+ while (i) {
+ printf(" %*s", indent, "|__ ");
+ print_usbdevice(d, i);
+ i = i->next;
+ }
+ indent -= 3;
+}
+static void print_tree_dev_children(struct usbdevice *d)
+{
+ indent += 4;
+ while (d) {
+ print_tree_dev_interface(d, d->first_interface);
+ print_tree_dev_children(d->first_child);
+ d = d->next;
+ }
+ indent -= 4;
+}
+
+static void print_tree(void)
+{
+ struct usbbusnode *b = usbbuslist;
+ while (b) {
+ print_usbbusnode(b);
+ if (b->first_child)
+ print_tree_dev_children(b->first_child);
+ b = b->next;
+ }
+}
+
+int lsusb_t(void)
+{
+ DIR *sbud = opendir(sys_bus_usb_devices);
+ if (sbud) {
+ walk_usb_devices(sbud);
+ closedir(sbud);
+ connect_devices();
+ sort_devices();
+ sort_busses();
+ print_tree();
+ } else
+ perror(sys_bus_usb_devices);
+ return sbud == NULL;
+}