branch Attitude Adjustment

git-svn-id: svn://svn.openwrt.org/openwrt/branches/attitude_adjustment@33625 3c298f89-4303-0410-b956-a3cf2f4a3e73

11 files changed, 833 insertions, 0 deletions

diff --git a/package/hotplug2/Makefile b/package/hotplug2/Makefile
new file mode 100644
index 000000000..e8483ddc7
--- /dev/null
+++ b/package/hotplug2/Makefile
@@ -0,0 +1,65 @@
+#
+# Copyright (C) 2006-2011 OpenWrt.org
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=hotplug2
+PKG_REV:=201
+PKG_VERSION:=$(PKG_REV)
+PKG_RELEASE:=4
+
+PKG_SOURCE_PROTO:=svn
+PKG_SOURCE_VERSION:=$(PKG_REV)
+PKG_SOURCE_SUBDIR:=hotplug2-$(PKG_VERSION)
+PKG_SOURCE_URL:=http://svn.nomi.cz/svn/isteve/hotplug2
+PKG_SOURCE:=$(PKG_SOURCE_SUBDIR).tar.gz
+#PKG_SOURCE_URL:=http://isteve.bofh.cz/~isteve/hotplug2
+#PKG_MD5SUM:=ea2c01d027b4002e4e6b0ff266f51a51
+
+include $(INCLUDE_DIR)/package.mk
+
+define Package/hotplug2
+  SECTION:=base
+  CATEGORY:=Base system
+  VERSION:=1.0-beta-$(PKG_RELEASE)
+  TITLE:=Version 1.0 Dynamic device management subsystem for embedded systems
+  URL:=http://isteve.bofh.cz/~isteve/hotplug2/
+  DEPENDS:=+!USE_UCLIBC:libbsd
+endef
+
+define Package/hotplug2/description
+ Hotplug2 is a trivial replacement of some of the UDev functionality
+ in a tiny pack, intended for Linux early userspace: Init RAM FS and InitRD.
+ This is an implementation of Hotplug2-1.0-beta
+endef
+
+define Package/hotplug2/conffiles
+/etc/hotplug2.rules
+endef
+
+MAKE_FLAGS += \
+	COPTS="$(TARGET_CFLAGS)" \
+	STATIC_WORKER="fork"
+
+ifneq ($(CONFIG_USE_EGLIBC),)
+  TARGET_LDFLAGS += -lbsd
+endif
+
+define Build/Compile
+	$(call Build/Compile/Default)
+	$(TARGET_CC) $(TARGET_CFLAGS) $(TARGET_LDFLAGS) -o $(PKG_BUILD_DIR)/udevtrigger src/udevtrigger.c
+endef
+
+define Package/hotplug2/install
+	$(INSTALL_DIR) $(1)/etc
+	$(INSTALL_DATA) ./files/hotplug2.rules $(1)/etc/
+	$(INSTALL_DIR) $(1)/sbin
+	$(INSTALL_BIN) $(PKG_BUILD_DIR)/udevtrigger $(1)/sbin/
+	$(INSTALL_BIN) $(PKG_BUILD_DIR)/hotplug2 $(1)/sbin/
+endef
+
+$(eval $(call BuildPackage,hotplug2))
diff --git a/package/hotplug2/files/hotplug2.rules b/package/hotplug2/files/hotplug2.rules
new file mode 100644
index 000000000..246cc3ab4
--- /dev/null
+++ b/package/hotplug2/files/hotplug2.rules
@@ -0,0 +1,10 @@
+$include /etc/hotplug2-common.rules
+
+SUBSYSTEM ~~ (^net$|^input$|^button$|^usb$|^ieee1394$|^block$|^atm$|^zaptel$|^tty$) {
+	exec /sbin/hotplug-call %SUBSYSTEM%
+}
+
+DEVICENAME == watchdog {
+	exec /sbin/watchdog -t 5 /dev/watchdog
+	next-event
+}
diff --git a/package/hotplug2/patches/100-env_memleak.patch b/package/hotplug2/patches/100-env_memleak.patch
new file mode 100644
index 000000000..28a3e2510
--- /dev/null
+++ b/package/hotplug2/patches/100-env_memleak.patch
@@ -0,0 +1,63 @@
+--- a/action.c
++++ b/action.c
+@@ -31,6 +31,30 @@ static void action_dumb(const struct set
+ }
+ 
+ /**
++ * Creates a "key=value" string from the given key and value
++ *
++ * @1 Key
++ * @2 Value
++ *
++ * Returns: Newly allocated string in "key=value" form
++ *
++ */
++static char* alloc_env(const char *key, const char *value) {
++	size_t keylen, vallen;
++	char *combined;
++
++	keylen = strlen(key);
++	vallen = strlen(value) + 1;
++
++	combined = xmalloc(keylen + vallen + 1);
++	memcpy(combined, key, keylen);
++	combined[keylen] = '=';
++	memcpy(&combined[keylen + 1], value, vallen);
++
++	return combined;
++}
++
++/**
+  * Choose what action should be taken according to passed settings.
+  *
+  * @1 Hotplug settings
+@@ -41,16 +65,25 @@ static void action_dumb(const struct set
+  */
+ void action_perform(struct settings_t *settings, struct uevent_t *event) {
+ 	int i;
++	char **env;
++
++	env = xmalloc(sizeof(char *) * event->env_vars_c);
++
++	for (i = 0; i < event->env_vars_c; i++) {
++		env[i] = alloc_env(event->env_vars[i].key, event->env_vars[i].value);
++		putenv(env[i]);
++	}
+ 
+-	for (i = 0; i < event->env_vars_c; i++)
+-		setenv(event->env_vars[i].key, event->env_vars[i].value, 1);
+-	
+ 	if (settings->dumb == 0) {
+ 		ruleset_execute(&settings->rules, event, settings);
+ 	} else {
+ 		action_dumb(settings, event);
+ 	}
+ 
+-	for (i = 0; i < event->env_vars_c; i++)
++	for (i = 0; i < event->env_vars_c; i++) {
+ 		unsetenv(event->env_vars[i].key);
++		free(env[i]);
++	}
++
++	free(env);
+ }
diff --git a/package/hotplug2/patches/110-static_worker.patch b/package/hotplug2/patches/110-static_worker.patch
new file mode 100644
index 000000000..3a5181f74
--- /dev/null
+++ b/package/hotplug2/patches/110-static_worker.patch
@@ -0,0 +1,20 @@
+--- a/common.mak
++++ b/common.mak
+@@ -1,7 +1,7 @@
+ # vim:set sw=8 nosta:
+ 
+ COPTS=-Os -Wall -g
+-LDFLAGS=-g -ldl
++LDFLAGS=-g
+ 
+ CFLAGS=$(COPTS)
+ FPIC=-fPIC
+--- a/Makefile
++++ b/Makefile
+@@ -40,5 +40,6 @@ ifdef STATIC_WORKER
+   CFLAGS += -DSTATIC_WORKER=1
+ else
+   CFLAGS += $(FPIC)
++  LDFLAGS += -ldl
+ endif
+ 
diff --git a/package/hotplug2/patches/120-sysfs_path_fix.patch b/package/hotplug2/patches/120-sysfs_path_fix.patch
new file mode 100644
index 000000000..0903057c7
--- /dev/null
+++ b/package/hotplug2/patches/120-sysfs_path_fix.patch
@@ -0,0 +1,14 @@
+--- a/rules/command.c
++++ b/rules/command.c
+@@ -374,9 +374,9 @@ RULES_COMMAND_F(cmd_firmware) {
+ 	if (firmware == NULL)
+ 		return -1;
+ 
+-	if (snprintf(sysfs_path_loading, PATH_MAX, "/sysfs%s/loading", devpath) >= PATH_MAX)
++	if (snprintf(sysfs_path_loading, PATH_MAX, "/sys%s/loading", devpath) >= PATH_MAX)
+ 		return -1;
+-	if (snprintf(sysfs_path_data, PATH_MAX, "/sysfs%s/data", devpath) >= PATH_MAX)
++	if (snprintf(sysfs_path_data, PATH_MAX, "/sys%s/data", devpath) >= PATH_MAX)
+ 		return -1;
+ 	if (snprintf(firmware_path, PATH_MAX, "%s/%s", argv[0], firmware) >= PATH_MAX)
+ 		return -1;
diff --git a/package/hotplug2/patches/130-cancel_download_fix.patch b/package/hotplug2/patches/130-cancel_download_fix.patch
new file mode 100644
index 000000000..c94000dcc
--- /dev/null
+++ b/package/hotplug2/patches/130-cancel_download_fix.patch
@@ -0,0 +1,18 @@
+--- a/rules/command.c
++++ b/rules/command.c
+@@ -385,13 +385,13 @@ RULES_COMMAND_F(cmd_firmware) {
+ 
+ 	infp = fopen(firmware_path, "r");
+ 	if (infp == NULL) {
+-		echo_to_file(sysfs_path_loading, "0\n", 2);
++		echo_to_file(sysfs_path_loading, "-1\n", 2);
+ 		return -1;
+ 	}
+ 	outfp = fopen(sysfs_path_data, "w");
+ 	if (outfp == NULL) {
+ 		fclose(infp);
+-		echo_to_file(sysfs_path_loading, "0\n", 2);
++		echo_to_file(sysfs_path_loading, "-1\n", 2);
+ 		return -1;
+ 	}
+ 
diff --git a/package/hotplug2/patches/140-worker_fork_fix.patch b/package/hotplug2/patches/140-worker_fork_fix.patch
new file mode 100644
index 000000000..eaf3c5c36
--- /dev/null
+++ b/package/hotplug2/patches/140-worker_fork_fix.patch
@@ -0,0 +1,56 @@
+--- a/action.c
++++ b/action.c
+@@ -39,7 +39,7 @@ static void action_dumb(const struct set
+  * Returns: Newly allocated string in "key=value" form
+  *
+  */
+-static char* alloc_env(const char *key, const char *value) {
++char* alloc_env(const char *key, const char *value) {
+ 	size_t keylen, vallen;
+ 	char *combined;
+ 
+--- a/action.h
++++ b/action.h
+@@ -12,5 +12,6 @@
+ #include "settings.h"
+ 
+ void action_perform(struct settings_t *, struct uevent_t *);
++char* alloc_env(const char *, const char *);
+ #endif /* ifndef ACTION_H */
+ 
+--- a/workers/worker_fork.c
++++ b/workers/worker_fork.c
+@@ -380,6 +380,7 @@ static void worker_fork_deinit(void *in_
+ 
+ 
+ static int worker_fork_process(void *in_ctx, struct uevent_t *uevent) {
++	char **env;
+ 	int i;
+ 	struct worker_fork_child_t *child;
+ 	struct worker_fork_ctx_t *ctx = in_ctx;
+@@ -406,6 +407,12 @@ static int worker_fork_process(void *in_
+ 		 * No child process is currently available.
+ 		 */
+ 		if (child == NULL) {
++			env = xmalloc(sizeof(char *) * uevent->env_vars_c);
++			for (i = 0; i < uevent->env_vars_c; i++) {
++				env[i] = alloc_env(uevent->env_vars[i].key, uevent->env_vars[i].value);
++				putenv(env[i]);
++			}
++
+ 			/*
+ 			 * Are the matching rules trivial enough that we
+ 			 * can execute them in the main process?
+@@ -421,6 +428,12 @@ static int worker_fork_process(void *in_
+ 			 */
+ 			if (ctx->children_count < ctx->max_children)
+ 				child = worker_fork_spawn(ctx);
++
++			for (i = 0; i < uevent->env_vars_c; i++) {
++				unsetenv(uevent->env_vars[i].key);
++				free(env[i]);
++			}
++			free(env);
+ 		}
+ 
+ 		/*
diff --git a/package/hotplug2/patches/150-force_fork_slow.patch b/package/hotplug2/patches/150-force_fork_slow.patch
new file mode 100644
index 000000000..47101f56b
--- /dev/null
+++ b/package/hotplug2/patches/150-force_fork_slow.patch
@@ -0,0 +1,21 @@
+--- a/workers/worker_fork.c
++++ b/workers/worker_fork.c
+@@ -396,7 +396,7 @@ static int worker_fork_process(void *in_
+ 		worker_fork_update_children(ctx);
+ 
+ 		child = NULL;
+-		for (i = 0; i < ctx->children_count; i++) {
++		for (i = 0; i < ctx->children_count && i < ctx->max_children; i++) {
+ 			if (ctx->children[i]->busy == 0) {
+ 				child = ctx->children[i];
+ 				break;
+@@ -426,7 +426,8 @@ static int worker_fork_process(void *in_
+ 			/*
+ 			 * We have to fork off a new child.
+ 			 */
+-			if (ctx->children_count < ctx->max_children)
++			if (ctx->children_count < ctx->max_children || 
++			(ruleset_flags(&ctx->settings->rules, uevent) & FLAG_SLOW))
+ 				child = worker_fork_spawn(ctx);
+ 
+ 			for (i = 0; i < uevent->env_vars_c; i++) {
diff --git a/package/hotplug2/patches/160-event_block_fix.patch b/package/hotplug2/patches/160-event_block_fix.patch
new file mode 100644
index 000000000..ac7e79ab1
--- /dev/null
+++ b/package/hotplug2/patches/160-event_block_fix.patch
@@ -0,0 +1,200 @@
+--- a/uevent.c
++++ b/uevent.c
+@@ -132,6 +132,8 @@ struct uevent_t *uevent_dup(const struct
+ 	
+ 	dest = xmalloc(sizeof(struct uevent_t));
+ 	dest->action = src->action;
++	dest->seqnum = src->seqnum;
++	dest->action_str = strdup(src->action_str);
+ 	dest->env_vars_c = src->env_vars_c;
+ 	dest->env_vars = xmalloc(sizeof(struct env_var_t) * dest->env_vars_c);
+ 	dest->plain_s = src->plain_s;
+--- a/workers/worker_fork.c
++++ b/workers/worker_fork.c
+@@ -1,6 +1,69 @@
+ #include "worker_fork.h"
+ 
+ static struct worker_fork_ctx_t *global_ctx;
++static struct worker_fork_uevent_t *uevent_list;
++
++static void worker_fork_uevent_free(struct worker_fork_uevent_t *node) {
++	uevent_free(node->uevent);
++	free(node);
++}
++
++static void worker_fork_uevent_add(void *in_ctx, struct uevent_t *uevent) {
++	char **env;
++	int i;
++	struct worker_fork_ctx_t *ctx = in_ctx;
++	struct worker_fork_uevent_t *node, *walker;
++
++	node = malloc(sizeof (struct worker_fork_uevent_t));
++	node->uevent = uevent_dup(uevent);
++	node->next = NULL;
++
++	if (!uevent_list) uevent_list = node;
++	else {
++		/*
++		 * Put events that need to fork first and in reverse order
++		 */
++		env = xmalloc(sizeof(char *) * node->uevent->env_vars_c);
++		for (i = 0; i < node->uevent->env_vars_c; i++) {
++			env[i] = alloc_env(node->uevent->env_vars[i].key, node->uevent->env_vars[i].value);
++			putenv(env[i]);
++		}
++		if (ruleset_flags(&ctx->settings->rules, uevent) & FLAG_SLOW) {
++			node->next = uevent_list;
++			uevent_list = node;
++		}
++		else {
++			for (walker = uevent_list; walker->next; walker = walker->next);
++			walker->next = node;
++		}
++		for (i = 0; i < node->uevent->env_vars_c; i++) {
++			unsetenv(node->uevent->env_vars[i].key);
++			free(env[i]);
++		}
++		free(env);
++	}
++}
++
++static void worker_fork_uevent_del(struct worker_fork_uevent_t *node) {
++	struct worker_fork_uevent_t *walker;
++
++	if (node == uevent_list) {
++		uevent_list = node->next;
++	}
++	else {
++		for (walker = uevent_list; walker->next; walker = walker->next)
++			if (walker->next == node) walker->next = node->next;
++	}
++	worker_fork_uevent_free(node);
++}
++
++static void worker_fork_uevent_empty(void) {
++	struct worker_fork_uevent_t *walker;
++
++	if (!uevent_list) return;
++	for (walker = uevent_list; walker->next; walker = walker->next) worker_fork_uevent_free(walker);
++	uevent_list = NULL;
++}
+ 
+ /**
+  * Destroys data structures related to the given child ID (not PID).
+@@ -315,6 +378,8 @@ static void *worker_fork_init(struct set
+ 	struct worker_fork_ctx_t *ctx;
+ 	PRINTFUNC();
+ 
++	uevent_list = NULL;
++
+ 	ctx = malloc(sizeof(struct worker_fork_ctx_t));
+ 	ctx->children = NULL;
+ 	ctx->children_count = 0;
+@@ -376,6 +441,7 @@ static void worker_fork_deinit(void *in_
+ 	free(ctx->children);
+ 	free(ctx);
+ 	global_ctx = NULL;
++	worker_fork_uevent_empty();
+ }
+ 
+ 
+@@ -384,15 +450,26 @@ static int worker_fork_process(void *in_
+ 	int i;
+ 	struct worker_fork_child_t *child;
+ 	struct worker_fork_ctx_t *ctx = in_ctx;
++	struct worker_fork_uevent_t *node, *walker;
++	event_seqnum_t seqnum;
++
++	worker_fork_uevent_add(ctx, uevent);
++	walker = uevent_list;
+ 
+ 	/*
+-	 * A big loop, because if we fail to process the event,
++	 * A big loop, because if we fail to process the events,
+ 	 * we don't want to give up.
+ 	 *
+ 	 * TODO: Decide if we want to limit the number of attempts
+ 	 * or set a time limit before reporting terminal failure.
+ 	 */
+ 	do {
++		/*
++		 * If more events are waiting, return to receive them
++		 */
++		if (!seqnum_get(&seqnum) && seqnum > uevent->seqnum) break;
++
++		node = walker;
+ 		worker_fork_update_children(ctx);
+ 
+ 		child = NULL;
+@@ -407,9 +484,9 @@ static int worker_fork_process(void *in_
+ 		 * No child process is currently available.
+ 		 */
+ 		if (child == NULL) {
+-			env = xmalloc(sizeof(char *) * uevent->env_vars_c);
+-			for (i = 0; i < uevent->env_vars_c; i++) {
+-				env[i] = alloc_env(uevent->env_vars[i].key, uevent->env_vars[i].value);
++			env = xmalloc(sizeof(char *) * node->uevent->env_vars_c);
++			for (i = 0; i < node->uevent->env_vars_c; i++) {
++				env[i] = alloc_env(node->uevent->env_vars[i].key, node->uevent->env_vars[i].value);
+ 				putenv(env[i]);
+ 			}
+ 
+@@ -418,8 +495,11 @@ static int worker_fork_process(void *in_
+ 			 * can execute them in the main process?
+ 			 */
+ 			if (ctx->always_fork == 0 && ctx->settings->dumb == 0 && 
+-			(ruleset_flags(&ctx->settings->rules, uevent) & FLAG_MASK_SLOW) == 0) {
+-				action_perform(ctx->settings, uevent);
++			(ruleset_flags(&ctx->settings->rules, node->uevent) & FLAG_MASK_SLOW) == 0) {
++				action_perform(ctx->settings, node->uevent);
++				walker = walker->next;
++				worker_fork_uevent_del(node);
++				if (walker) continue;
+ 				break;
+ 			}
+ 			
+@@ -427,11 +507,11 @@ static int worker_fork_process(void *in_
+ 			 * We have to fork off a new child.
+ 			 */
+ 			if (ctx->children_count < ctx->max_children || 
+-			(ruleset_flags(&ctx->settings->rules, uevent) & FLAG_SLOW))
++			(ruleset_flags(&ctx->settings->rules, node->uevent) & FLAG_SLOW))
+ 				child = worker_fork_spawn(ctx);
+ 
+-			for (i = 0; i < uevent->env_vars_c; i++) {
+-				unsetenv(uevent->env_vars[i].key);
++			for (i = 0; i < node->uevent->env_vars_c; i++) {
++				unsetenv(node->uevent->env_vars[i].key);
+ 				free(env[i]);
+ 			}
+ 			free(env);
+@@ -442,9 +522,14 @@ static int worker_fork_process(void *in_
+ 		 */
+ 		if (child != NULL) {
+ 			child->busy = 1;
+-			if (!worker_fork_relay_event(child->event_fd, uevent));
+-				break;
+-			child->busy = 0;
++			if (worker_fork_relay_event(child->event_fd, node->uevent)) {
++				child->busy = 0;
++				continue;
++			}
++			walker = walker->next;
++			worker_fork_uevent_del(node);
++			if (walker) continue;
++			break;
+ 		}
+ 
+ 		/* 
+--- a/workers/worker_fork.h
++++ b/workers/worker_fork.h
+@@ -35,4 +35,9 @@ struct worker_fork_ctx_t {
+ 	struct settings_t			*settings;
+ };
+ 
++struct worker_fork_uevent_t {
++	struct uevent_t *uevent;
++	struct worker_fork_uevent_t *next;
++};
++
+ #endif
diff --git a/package/hotplug2/patches/170-non_fatal_include.patch b/package/hotplug2/patches/170-non_fatal_include.patch
new file mode 100644
index 000000000..0b8e85283
--- /dev/null
+++ b/package/hotplug2/patches/170-non_fatal_include.patch
@@ -0,0 +1,21 @@
+Index: hotplug2-201/parser/parser.c
+===================================================================
+--- hotplug2-201.orig/parser/parser.c	2009-12-09 19:44:13.000000000 +0100
++++ hotplug2-201/parser/parser.c	2011-02-08 18:06:44.681213713 +0100
+@@ -1,5 +1,7 @@
+ #include "parser.h"
+ 
++#include <errno.h>
++
+ /*
+  * Grammar: 
+  * input => directive // TOKEN_ROOTKW
+@@ -578,7 +580,7 @@
+ 	ctx.lexer.fp = fopen(filename, "r");
+ 	if (ctx.lexer.fp == NULL) {
+ 		parser_clear(&ctx);
+-		return -1;
++		return (errno == ENOENT) ? 0 : -1;
+ 	}
+ 	ctx.lexer.filename = strdup(filename);
+ 
diff --git a/package/hotplug2/src/udevtrigger.c b/package/hotplug2/src/udevtrigger.c
new file mode 100644
index 000000000..297e64cc9
--- /dev/null
+++ b/package/hotplug2/src/udevtrigger.c
@@ -0,0 +1,345 @@
+/*
+ * Copyright (C) 2004-2006 Kay Sievers <kay@vrfy.org>
+ * Copyright (C) 2006 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.
+ * 
+ *	This program is distributed in the hope that it will be useful, but
+ *	WITHOUT ANY WARRANTY; without even the implied warranty of
+ *	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *	General Public License for more details.
+ * 
+ *	You should have received a copy of the GNU General Public License along
+ *	with this program; if not, write to the Free Software Foundation, Inc.,
+ *	51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ */
+
+#include <stdlib.h>
+#include <stddef.h>
+#include <stdarg.h>
+#include <string.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <getopt.h>
+#include <errno.h>
+#include <dirent.h>
+#include <fcntl.h>
+#include <syslog.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+#define PATH_SIZE 512
+
+static int verbose;
+static int dry_run;
+
+void log_message(int priority, const char *format, ...)
+{
+	va_list args;
+
+	va_start(args, format);
+	vsyslog(priority, format, args);
+	va_end(args);
+}
+
+#undef err
+#define err(format, arg...)                         \
+    do {                                    \
+        log_message(LOG_ERR ,"%s: " format ,__FUNCTION__ ,## arg);  \
+    } while (0)
+
+#undef info
+#define info(format, arg...)                            \
+    do {                                    \
+        log_message(LOG_INFO ,"%s: " format ,__FUNCTION__ ,## arg); \
+    } while (0)
+
+#ifdef DEBUG
+#undef dbg
+#define dbg(format, arg...)                         \
+    do {                                    \
+        log_message(LOG_DEBUG ,"%s: " format ,__FUNCTION__ ,## arg);    \
+    } while (0)
+#else
+#define dbg(...) do {} while(0)
+#endif
+
+
+static void trigger_uevent(const char *devpath)
+{
+	char filename[PATH_SIZE];
+	int fd;
+
+	strlcpy(filename, "/sys", sizeof(filename));
+	strlcat(filename, devpath, sizeof(filename));
+	strlcat(filename, "/uevent", sizeof(filename));
+
+	if (verbose)
+		printf("%s\n", devpath);
+
+	if (dry_run)
+		return;
+
+	fd = open(filename, O_WRONLY);
+	if (fd < 0) {
+		dbg("error on opening %s: %s\n", filename, strerror(errno));
+		return;
+	}
+
+	if (write(fd, "add", 3) < 0)
+		info("error on triggering %s: %s\n", filename, strerror(errno));
+
+	close(fd);
+}
+
+static int sysfs_resolve_link(char *devpath, size_t size)
+{
+	char link_path[PATH_SIZE];
+	char link_target[PATH_SIZE];
+	int len;
+	int i;
+	int back;
+
+	strlcpy(link_path, "/sys", sizeof(link_path));
+	strlcat(link_path, devpath, sizeof(link_path));
+	len = readlink(link_path, link_target, sizeof(link_target));
+	if (len <= 0)
+		return -1;
+	link_target[len] = '\0';
+	dbg("path link '%s' points to '%s'", devpath, link_target);
+
+	for (back = 0; strncmp(&link_target[back * 3], "../", 3) == 0; back++)
+		;
+	dbg("base '%s', tail '%s', back %i", devpath, &link_target[back * 3], back);
+	for (i = 0; i <= back; i++) {
+		char *pos = strrchr(devpath, '/');
+
+		if (pos == NULL)
+			return -1;
+		pos[0] = '\0';
+	}
+	dbg("after moving back '%s'", devpath);
+	strlcat(devpath, "/", size);
+	strlcat(devpath, &link_target[back * 3], size);
+	return 0;
+}
+
+
+static int device_list_insert(const char *path)
+{
+	char filename[PATH_SIZE];
+	char devpath[PATH_SIZE];
+	struct stat statbuf;
+
+	dbg("add '%s'" , path);
+
+	/* we only have a device, if we have an uevent file */
+	strlcpy(filename, path, sizeof(filename));
+	strlcat(filename, "/uevent", sizeof(filename));
+	if (stat(filename, &statbuf) < 0)
+		return -1;
+	if (!(statbuf.st_mode & S_IWUSR))
+		return -1;
+
+	strlcpy(devpath, &path[4], sizeof(devpath));
+
+	/* resolve possible link to real target */
+	if (lstat(path, &statbuf) < 0)
+		return -1;
+	if (S_ISLNK(statbuf.st_mode))
+		if (sysfs_resolve_link(devpath, sizeof(devpath)) != 0)
+			return -1;
+
+	trigger_uevent(devpath);
+	return 0;
+}
+
+
+static void scan_subsystem(const char *subsys)
+{
+	char base[PATH_SIZE];
+	DIR *dir;
+	struct dirent *dent;
+
+	strlcpy(base, "/sys/", sizeof(base));
+	strlcat(base, subsys, sizeof(base));
+
+	dir = opendir(base);
+	if (dir != NULL) {
+		for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
+			char dirname[PATH_SIZE];
+			DIR *dir2;
+			struct dirent *dent2;
+
+			if (dent->d_name[0] == '.')
+				continue;
+
+			strlcpy(dirname, base, sizeof(dirname));
+			strlcat(dirname, "/", sizeof(dirname));
+			strlcat(dirname, dent->d_name, sizeof(dirname));
+			strlcat(dirname, "/devices", sizeof(dirname));
+
+			/* look for devices */
+			dir2 = opendir(dirname);
+			if (dir2 != NULL) {
+				for (dent2 = readdir(dir2); dent2 != NULL; dent2 = readdir(dir2)) {
+					char dirname2[PATH_SIZE];
+
+					if (dent2->d_name[0] == '.')
+						continue;
+
+					strlcpy(dirname2, dirname, sizeof(dirname2));
+					strlcat(dirname2, "/", sizeof(dirname2));
+					strlcat(dirname2, dent2->d_name, sizeof(dirname2));
+					device_list_insert(dirname2);
+				}
+				closedir(dir2);
+			}
+		}
+		closedir(dir);
+	}
+}
+
+static void scan_block(void)
+{
+	char base[PATH_SIZE];
+	DIR *dir;
+	struct dirent *dent;
+
+	strlcpy(base, "/sys/block", sizeof(base));
+
+	dir = opendir(base);
+	if (dir != NULL) {
+		for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
+			char dirname[PATH_SIZE];
+			DIR *dir2;
+			struct dirent *dent2;
+
+			if (dent->d_name[0] == '.')
+				continue;
+
+			strlcpy(dirname, base, sizeof(dirname));
+			strlcat(dirname, "/", sizeof(dirname));
+			strlcat(dirname, dent->d_name, sizeof(dirname));
+			if (device_list_insert(dirname) != 0)
+				continue;
+
+			/* look for partitions */
+			dir2 = opendir(dirname);
+			if (dir2 != NULL) {
+				for (dent2 = readdir(dir2); dent2 != NULL; dent2 = readdir(dir2)) {
+					char dirname2[PATH_SIZE];
+
+					if (dent2->d_name[0] == '.')
+						continue;
+
+					if (!strcmp(dent2->d_name,"device"))
+						continue;
+
+					strlcpy(dirname2, dirname, sizeof(dirname2));
+					strlcat(dirname2, "/", sizeof(dirname2));
+					strlcat(dirname2, dent2->d_name, sizeof(dirname2));
+					device_list_insert(dirname2);
+				}
+				closedir(dir2);
+			}
+		}
+		closedir(dir);
+	}
+}
+
+static void scan_class(void)
+{
+	char base[PATH_SIZE];
+	DIR *dir;
+	struct dirent *dent;
+
+	strlcpy(base, "/sys/class", sizeof(base));
+
+	dir = opendir(base);
+	if (dir != NULL) {
+		for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
+			char dirname[PATH_SIZE];
+			DIR *dir2;
+			struct dirent *dent2;
+
+			if (dent->d_name[0] == '.')
+				continue;
+
+			strlcpy(dirname, base, sizeof(dirname));
+			strlcat(dirname, "/", sizeof(dirname));
+			strlcat(dirname, dent->d_name, sizeof(dirname));
+			dir2 = opendir(dirname);
+			if (dir2 != NULL) {
+				for (dent2 = readdir(dir2); dent2 != NULL; dent2 = readdir(dir2)) {
+					char dirname2[PATH_SIZE];
+
+					if (dent2->d_name[0] == '.')
+						continue;
+
+					if (!strcmp(dent2->d_name, "device"))
+						continue;
+
+					strlcpy(dirname2, dirname, sizeof(dirname2));
+					strlcat(dirname2, "/", sizeof(dirname2));
+					strlcat(dirname2, dent2->d_name, sizeof(dirname2));
+					device_list_insert(dirname2);
+				}
+				closedir(dir2);
+			}
+		}
+		closedir(dir);
+	}
+}
+
+int main(int argc, char *argv[], char *envp[])
+{
+	char base[PATH_SIZE];
+	struct stat statbuf;
+	int failed = 0;
+	int option;
+
+	openlog("udevtrigger", LOG_PID | LOG_CONS, LOG_DAEMON);
+
+	while (1) {
+		option = getopt(argc, argv, "vnh");
+		if (option == -1)
+			break;
+
+		switch (option) {
+		case 'v':
+			verbose = 1;
+			break;
+		case 'n':
+			dry_run = 1;
+			break;
+		case 'h':
+			printf("Usage: udevtrigger OPTIONS\n"
+			       "  -v                     print the list of devices while running\n"
+			       "  -n                     do not actually trigger the events\n"
+			       "  -h                     print this text\n"
+			       "\n");
+			goto exit;
+		default:
+			goto exit;
+		}
+	}
+
+
+	/* if we have /sys/subsystem, forget all the old stuff */
+	scan_subsystem("bus");
+	scan_class();
+
+	/* scan "block" if it isn't a "class" */
+	strlcpy(base, "/sys/class/block", sizeof(base));
+	if (stat(base, &statbuf) != 0)
+		scan_block();
+
+exit:
+
+	closelog();
+	return 0;
+}