[PATCH 1/2][usbutils] lsusb: port to hwdb

[Tom Gundersen]

Most of the information in usb.ids is now contained in udev's hwdb. Read the
information from the hwdb instead of usb.ids.

This would allow distributions to no longer ship (most of) usb.ids by default,
but rather keep all the usb device information in the hwdb.

This patch introduces a dependency on libusb >= 196.

v2: drop support from reading data from usb.ids which is already in hwdb

Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 Makefile.am  |   5 +-
 configure.ac |   2 +
 names.c      | 361 +++++++----------------------------------------------------
 3 files changed, 45 insertions(+), 323 deletions(-)

diff --git a/Makefile.am b/Makefile.am
index 1e85a1e..70b9de9 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -23,11 +23,12 @@ lsusb_SOURCES = \
 	usbmisc.c usbmisc.h
 
 lsusb_CPPFLAGS = \
-	$(AM_CPPFLAGS) $(LIBUSB_CFLAGS) \
+	$(AM_CPPFLAGS) $(LIBUSB_CFLAGS) $(UDEV_CFLAGS) \
 	-DDATADIR=\"$(datadir)\"
 
 lsusb_LDADD = \
-	$(LIBUSB_LIBS)
+	$(LIBUSB_LIBS) \
+	$(UDEV_LIBS)
 
 if HAVE_ZLIB
 lsusb_CPPFLAGS += -DHAVE_LIBZ
diff --git a/configure.ac b/configure.ac
index adfb4b6..b4b0880 100644
--- a/configure.ac
+++ b/configure.ac
@@ -26,6 +26,8 @@ AM_CONDITIONAL([INSTALL_USBIDS], [test "x$enable_usbids" != "xno"])
 
 PKG_CHECK_MODULES(LIBUSB, libusb-1.0 >= 1.0.0)
 
+PKG_CHECK_MODULES(UDEV, libudev >= 196)
+
 AC_CONFIG_HEADERS([config.h])
 AC_CONFIG_FILES([
 	Makefile
diff --git a/names.c b/names.c
index 12cbd60..f543240 100644
--- a/names.c
+++ b/names.c
@@ -3,6 +3,7 @@
  *      names.c  --  USB name database manipulation routines
  *
  *      Copyright (C) 1999, 2000  Thomas Sailer (sailer@xxxxxxxxxxxxxx)
+ *      Copyright (C) 2013  Tom Gundersen (teg@xxxxxxx)
  *
  *      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
@@ -34,6 +35,8 @@
 #include <stdio.h>
 #include <ctype.h>
 
+#include <libudev.h>
+
 #ifdef HAVE_LIBZ
 #include <zlib.h>
 #define 	usb_file			gzFile
@@ -52,36 +55,6 @@
 
 /* ---------------------------------------------------------------------- */
 
-struct vendor {
-	struct vendor *next;
-	u_int16_t vendorid;
-	char name[1];
-};
-
-struct product {
-	struct product *next;
-	u_int16_t vendorid, productid;
-	char name[1];
-};
-
-struct class {
-	struct class *next;
-	u_int8_t classid;
-	char name[1];
-};
-
-struct subclass {
-	struct subclass *next;
-	u_int8_t classid, subclassid;
-	char name[1];
-};
-
-struct protocol {
-	struct protocol *next;
-	u_int8_t classid, subclassid, protocolid;
-	char name[1];
-};
-
 struct audioterminal {
 	struct audioterminal *next;
 	u_int16_t termt;
@@ -118,11 +91,8 @@ static unsigned int hashnum(unsigned int num)
 
 /* ---------------------------------------------------------------------- */
 
-static struct vendor *vendors[HASHSZ] = { NULL, };
-static struct product *products[HASHSZ] = { NULL, };
-static struct class *classes[HASHSZ] = { NULL, };
-static struct subclass *subclasses[HASHSZ] = { NULL, };
-static struct protocol *protocols[HASHSZ] = { NULL, };
+static struct udev *udev = NULL;
+static struct udev_hwdb *hwdb = NULL;
 static struct audioterminal *audioterminals[HASHSZ] = { NULL, };
 static struct videoterminal *videoterminals[HASHSZ] = { NULL, };
 static struct genericstrtable *hiddescriptors[HASHSZ] = { NULL, };
@@ -187,59 +157,55 @@ const char *names_countrycode(unsigned int countrycode)
 	return names_genericstrtable(countrycodes, countrycode);
 }
 
-const char *names_vendor(u_int16_t vendorid)
+static const char *hwdb_get(const char *modalias, const char *key)
 {
-	struct vendor *v;
+	struct udev_list_entry *entry;
+
+	udev_list_entry_foreach(entry, udev_hwdb_get_properties_list_entry(hwdb, modalias, 0))
+		if (strcmp(udev_list_entry_get_name(entry), key) == 0)
+			return udev_list_entry_get_value(entry);
 
-	v = vendors[hashnum(vendorid)];
-	for (; v; v = v->next)
-		if (v->vendorid == vendorid)
-			return v->name;
 	return NULL;
 }
 
+const char *names_vendor(u_int16_t vendorid)
+{
+	char modalias[64];
+
+	sprintf(modalias, "usb:v%04X*", vendorid);
+	return hwdb_get(modalias, "ID_VENDOR_FROM_DATABASE");
+}
+
 const char *names_product(u_int16_t vendorid, u_int16_t productid)
 {
-	struct product *p;
+	char modalias[64];
 
-	p = products[hashnum((vendorid << 16) | productid)];
-	for (; p; p = p->next)
-		if (p->vendorid == vendorid && p->productid == productid)
-			return p->name;
-	return NULL;
+	sprintf(modalias, "usb:v%04Xp%04X*", vendorid, productid);
+	return hwdb_get(modalias, "ID_MODEL_FROM_DATABASE");
 }
 
 const char *names_class(u_int8_t classid)
 {
-	struct class *c;
+	char modalias[64];
 
-	c = classes[hashnum(classid)];
-	for (; c; c = c->next)
-		if (c->classid == classid)
-			return c->name;
-	return NULL;
+	sprintf(modalias, "usb:v*p*d*dc%02X*", classid);
+	return hwdb_get(modalias, "ID_USB_CLASS_FROM_DATABASE");
 }
 
 const char *names_subclass(u_int8_t classid, u_int8_t subclassid)
 {
-	struct subclass *s;
+	char modalias[64];
 
-	s = subclasses[hashnum((classid << 8) | subclassid)];
-	for (; s; s = s->next)
-		if (s->classid == classid && s->subclassid == subclassid)
-			return s->name;
-	return NULL;
+	sprintf(modalias, "usb:v*p*d*dc%02Xdsc%02X*", classid, subclassid);
+	return hwdb_get(modalias, "ID_USB_SUBCLASS_FROM_DATABASE");
 }
 
 const char *names_protocol(u_int8_t classid, u_int8_t subclassid, u_int8_t protocolid)
 {
-	struct protocol *p;
+	char modalias[64];
 
-	p = protocols[hashnum((classid << 16) | (subclassid << 8) | protocolid)];
-	for (; p; p = p->next)
-		if (p->classid == classid && p->subclassid == subclassid && p->protocolid == protocolid)
-			return p->name;
-	return NULL;
+	sprintf(modalias, "usb:v*p*d*dc%02Xdsc%02Xdp%02X*", classid, subclassid, protocolid);
+	return hwdb_get(modalias, "ID_USB_PROTOCOL_FROM_DATABASE");
 }
 
 const char *names_audioterminal(u_int16_t termt)
@@ -316,105 +282,6 @@ int get_subclass_string(char *buf, size_t size, u_int8_t cls, u_int8_t subcls)
 
 /* ---------------------------------------------------------------------- */
 
-static int new_vendor(const char *name, u_int16_t vendorid)
-{
-	struct vendor *v;
-	unsigned int h = hashnum(vendorid);
-
-	v = vendors[h];
-	for (; v; v = v->next)
-		if (v->vendorid == vendorid)
-			return -1;
-	v = malloc(sizeof(struct vendor) + strlen(name));
-	if (!v)
-		return -1;
-	strcpy(v->name, name);
-	v->vendorid = vendorid;
-	v->next = vendors[h];
-	vendors[h] = v;
-	return 0;
-}
-
-static int new_product(const char *name, u_int16_t vendorid, u_int16_t productid)
-{
-	struct product *p;
-	unsigned int h = hashnum((vendorid << 16) | productid);
-
-	p = products[h];
-	for (; p; p = p->next)
-		if (p->vendorid == vendorid && p->productid == productid)
-			return -1;
-	p = malloc(sizeof(struct product) + strlen(name));
-	if (!p)
-		return -1;
-	strcpy(p->name, name);
-	p->vendorid = vendorid;
-	p->productid = productid;
-	p->next = products[h];
-	products[h] = p;
-	return 0;
-}
-
-static int new_class(const char *name, u_int8_t classid)
-{
-	struct class *c;
-	unsigned int h = hashnum(classid);
-
-	c = classes[h];
-	for (; c; c = c->next)
-		if (c->classid == classid)
-			return -1;
-	c = malloc(sizeof(struct class) + strlen(name));
-	if (!c)
-		return -1;
-	strcpy(c->name, name);
-	c->classid = classid;
-	c->next = classes[h];
-	classes[h] = c;
-	return 0;
-}
-
-static int new_subclass(const char *name, u_int8_t classid, u_int8_t subclassid)
-{
-	struct subclass *s;
-	unsigned int h = hashnum((classid << 8) | subclassid);
-
-	s = subclasses[h];
-	for (; s; s = s->next)
-		if (s->classid == classid && s->subclassid == subclassid)
-			return -1;
-	s = malloc(sizeof(struct subclass) + strlen(name));
-	if (!s)
-		return -1;
-	strcpy(s->name, name);
-	s->classid = classid;
-	s->subclassid = subclassid;
-	s->next = subclasses[h];
-	subclasses[h] = s;
-	return 0;
-}
-
-static int new_protocol(const char *name, u_int8_t classid, u_int8_t subclassid, u_int8_t protocolid)
-{
-	struct protocol *p;
-	unsigned int h = hashnum((classid << 16) | (subclassid << 8) | protocolid);
-
-	p = protocols[h];
-	for (; p; p = p->next)
-		if (p->classid == classid && p->subclassid == subclassid && p->protocolid == protocolid)
-			return -1;
-	p = malloc(sizeof(struct protocol) + strlen(name));
-	if (!p)
-		return -1;
-	strcpy(p->name, name);
-	p->classid = classid;
-	p->subclassid = subclassid;
-	p->protocolid = protocolid;
-	p->next = protocols[h];
-	protocols[h] = p;
-	return 0;
-}
-
 static int new_audioterminal(const char *name, u_int16_t termt)
 {
 	struct audioterminal *at;
@@ -513,86 +380,6 @@ static int new_countrycode(const char *name, unsigned int countrycode)
 
 /* ---------------------------------------------------------------------- */
 
-static void free_vendor(void)
-{
-	struct vendor *cur, *tmp;
-	int i;
-
-	for (i = 0; i < HASHSZ; i++) {
-		cur = vendors[i];
-		vendors[i] = NULL;
-		while (cur) {
-			tmp = cur;
-			cur = cur->next;
-			free(tmp);
-		}
-	}
-}
-
-static void free_product(void)
-{
-	struct product *cur, *tmp;
-	int i;
-
-	for (i = 0; i < HASHSZ; i++) {
-		cur = products[i];
-		products[i] = NULL;
-		while (cur) {
-			tmp = cur;
-			cur = cur->next;
-			free(tmp);
-		}
-	}
-}
-
-static void free_class(void)
-{
-	struct class *cur, *tmp;
-	int i;
-
-	for (i = 0; i < HASHSZ; i++) {
-		cur = classes[i];
-		classes[i] = NULL;
-		while (cur) {
-			tmp = cur;
-			cur = cur->next;
-			free(tmp);
-		}
-	}
-}
-
-static void free_subclass(void)
-{
-	struct subclass *cur, *tmp;
-	int i;
-
-	for (i = 0; i < HASHSZ; i++) {
-		cur = subclasses[i];
-		subclasses[i] = NULL;
-		while (cur) {
-			tmp = cur;
-			cur = cur->next;
-			free(tmp);
-		}
-	}
-}
-
-static void free_protocol(void)
-{
-	struct protocol *cur, *tmp;
-	int i;
-
-	for (i = 0; i < HASHSZ; i++) {
-		cur = protocols[i];
-		protocols[i] = NULL;
-		while (cur) {
-			tmp = cur;
-			cur = cur->next;
-			free(tmp);
-		}
-	}
-}
-
 static void free_audioterminal(void)
 {
 	struct audioterminal *cur, *tmp;
@@ -765,29 +552,6 @@ static void parse(usb_file f)
 			lastlang = u;
 			continue;
 		}
-		if (buf[0] == 'C' && /*isspace(buf[1])*/ buf[1] == ' ') {
-			/* class spec */
-			cp = buf+2;
-			while (isspace(*cp))
-				cp++;
-			if (!isxdigit(*cp)) {
-				fprintf(stderr, "Invalid class spec at line %u\n", linectr);
-				continue;
-			}
-			u = strtoul(cp, &cp, 16);
-			while (isspace(*cp))
-				cp++;
-			if (!*cp) {
-				fprintf(stderr, "Invalid class spec at line %u\n", linectr);
-				continue;
-			}
-			if (new_class(cp, u))
-				fprintf(stderr, "Duplicate class spec at line %u class %04x %s\n", linectr, u, cp);
-			DBG(printf("line %5u class %02x %s\n", linectr, u, cp));
-			lasthut = lastlang = lastvendor = lastsubclass = -1;
-			lastclass = u;
-			continue;
-		}
 		if (buf[0] == 'A' && buf[1] == 'T' && isspace(buf[2])) {
 			/* audio terminal type spec */
 			cp = buf+3;
@@ -851,22 +615,6 @@ static void parse(usb_file f)
 			DBG(printf("line %5u keyboard country code %02u %s\n", linectr, u, cp));
 			continue;
 		}
-		if (isxdigit(*cp)) {
-			/* vendor */
-			u = strtoul(cp, &cp, 16);
-			while (isspace(*cp))
-				cp++;
-			if (!*cp) {
-				fprintf(stderr, "Invalid vendor spec at line %u\n", linectr);
-				continue;
-			}
-			if (new_vendor(cp, u))
-				fprintf(stderr, "Duplicate vendor spec at line %u vendor %04x %s\n", linectr, u, cp);
-			DBG(printf("line %5u vendor %04x %s\n", linectr, u, cp));
-			lastvendor = u;
-			lasthut = lastlang = lastclass = lastsubclass = -1;
-			continue;
-		}
 		if (buf[0] == '\t' && isxdigit(buf[1])) {
 			/* product or subclass spec */
 			u = strtoul(buf+1, &cp, 16);
@@ -876,19 +624,6 @@ static void parse(usb_file f)
 				fprintf(stderr, "Invalid product/subclass spec at line %u\n", linectr);
 				continue;
 			}
-			if (lastvendor != -1) {
-				if (new_product(cp, lastvendor, u))
-					fprintf(stderr, "Duplicate product spec at line %u product %04x:%04x %s\n", linectr, lastvendor, u, cp);
-				DBG(printf("line %5u product %04x:%04x %s\n", linectr, lastvendor, u, cp));
-				continue;
-			}
-			if (lastclass != -1) {
-				if (new_subclass(cp, lastclass, u))
-					fprintf(stderr, "Duplicate subclass spec at line %u class %02x:%02x %s\n", linectr, lastclass, u, cp);
-				DBG(printf("line %5u subclass %02x:%02x %s\n", linectr, lastclass, u, cp));
-				lastsubclass = u;
-				continue;
-			}
 			if (lasthut != -1) {
 				if (new_hutus(cp, (lasthut << 16)+u))
 					fprintf(stderr, "Duplicate HUT Usage Spec at line %u\n", linectr);
@@ -902,24 +637,6 @@ static void parse(usb_file f)
 			fprintf(stderr, "Product/Subclass spec without prior Vendor/Class spec at line %u\n", linectr);
 			continue;
 		}
-		if (buf[0] == '\t' && buf[1] == '\t' && isxdigit(buf[2])) {
-			/* protocol spec */
-			u = strtoul(buf+2, &cp, 16);
-			while (isspace(*cp))
-				cp++;
-			if (!*cp) {
-				fprintf(stderr, "Invalid protocol spec at line %u\n", linectr);
-				continue;
-			}
-			if (lastclass != -1 && lastsubclass != -1) {
-				if (new_protocol(cp, lastclass, lastsubclass, u))
-					fprintf(stderr, "Duplicate protocol spec at line %u class %02x:%02x:%02x %s\n", linectr, lastclass, lastsubclass, u, cp);
-				DBG(printf("line %5u protocol %02x:%02x:%02x %s\n", linectr, lastclass, lastsubclass, u, cp));
-				continue;
-			}
-			fprintf(stderr, "Protocol spec without prior Class and Subclass spec at line %u\n", linectr);
-			continue;
-		}
 		if (buf[0] == 'H' && buf[1] == 'I' && buf[2] == 'D' && /*isspace(buf[3])*/ buf[3] == ' ') {
 			cp = buf + 4;
 			while (isspace(*cp))
@@ -994,23 +711,25 @@ static void parse(usb_file f)
 int names_init(char *n)
 {
 	usb_file f;
+	int r = 0;
 
 	f = usb_fopen(n, "r");
 	if (!f)
-		return errno;
+		r = errno;
 
 	parse(f);
 	usb_close(f);
-	return 0;
+
+	udev = udev_new();
+	hwdb = udev_hwdb_new(udev);
+
+	return r;
 }
 
 void names_exit(void)
 {
-	free_vendor();
-	free_product();
-	free_class();
-	free_subclass();
-	free_protocol();
+	hwdb = udev_hwdb_unref(hwdb);
+	udev = udev_unref(udev);
 	free_audioterminal();
 	free_videoterminal();
 	free_genericstrtable();
-- 
1.8.4

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