Strip down procd to the necessary code, update copyright

4 files changed, 0 insertions, 968 deletions

diff --git a/plug/coldplug.c b/plug/coldplug.c
deleted file mode 100644
index 5fcb9a3..0000000
--- a/plug/coldplug.c
+++ /dev/null
@@ -1,69 +0,0 @@
-/*
- * Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
- * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License version 2.1
- * as published by the Free Software Foundation
- *
- * 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.
- */
-
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <sys/mount.h>
-
-#include <unistd.h>
-
-#include "../procd.h"
-#include "../libc-compat.h"
-
-#include "hotplug.h"
-
-static struct uloop_process udevtrigger;
-
-static void coldplug_complete(struct uloop_timeout *t)
-{
-	DEBUG(4, "Coldplug complete\n");
-	hotplug_last_event(NULL);
-	procd_state_next();
-}
-
-static void udevtrigger_complete(struct uloop_process *proc, int ret)
-{
-	DEBUG(4, "Finished udevtrigger\n");
-	hotplug_last_event(coldplug_complete);
-}
-
-void procd_coldplug(void)
-{
-	char *argv[] = { "udevtrigger", NULL };
-	unsigned int oldumask = umask(0);
-
-	umount2("/dev/pts", MNT_DETACH);
-	umount2("/dev/", MNT_DETACH);
-	mount("tmpfs", "/dev", "tmpfs", MS_NOSUID, "mode=0755,size=512K");
-	ignore(symlink("/tmp/shm", "/dev/shm"));
-	mkdir("/dev/pts", 0755);
-	umask(oldumask);
-	mount("devpts", "/dev/pts", "devpts", MS_NOEXEC | MS_NOSUID, 0);
-	udevtrigger.cb = udevtrigger_complete;
-	udevtrigger.pid = fork();
-	if (!udevtrigger.pid) {
-		execvp(argv[0], argv);
-		ERROR("Failed to start coldplug\n");
-		exit(-1);
-	}
-
-	if (udevtrigger.pid <= 0) {
-		ERROR("Failed to start new coldplug instance\n");
-		return;
-	}
-
-	uloop_process_add(&udevtrigger);
-
-	DEBUG(4, "Launched coldplug instance, pid=%d\n", (int) udevtrigger.pid);
-}
diff --git a/plug/hotplug.c b/plug/hotplug.c
deleted file mode 100644
index b5ebd07..0000000
--- a/plug/hotplug.c
+++ /dev/null
@@ -1,610 +0,0 @@
-/*
- * Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
- * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License version 2.1
- * as published by the Free Software Foundation
- *
- * 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.
- */
-
-#include <sys/stat.h>
-#include <sys/socket.h>
-#include <sys/types.h>
-
-#include <linux/types.h>
-#include <linux/netlink.h>
-
-#include <libubox/blobmsg_json.h>
-#include <libubox/json_script.h>
-#include <libubox/uloop.h>
-#include <json-c/json.h>
-
-#include <fcntl.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <libgen.h>
-
-#include "../procd.h"
-
-#include "hotplug.h"
-
-#define HOTPLUG_WAIT	500
-
-struct cmd_handler;
-struct cmd_queue {
-	struct list_head list;
-
-	struct blob_attr *msg;
-	struct blob_attr *data;
-	int timeout;
-
-	void (*handler)(struct blob_attr *msg, struct blob_attr *data);
-	void (*start)(struct blob_attr *msg, struct blob_attr *data);
-	void (*complete)(struct blob_attr *msg, struct blob_attr *data, int ret);
-};
-
-struct button_timeout {
-	struct list_head list;
-	struct uloop_timeout timeout;
-	char *name;
-	int seen;
-	struct blob_attr *data;
-};
-
-static LIST_HEAD(cmd_queue);
-static LIST_HEAD(button_timer);
-static struct uloop_process queue_proc;
-static struct uloop_timeout last_event;
-static struct blob_buf b, button_buf;
-static char *rule_file;
-static struct blob_buf script;
-static struct cmd_queue *current;
-
-static void queue_add(struct cmd_handler *h, struct blob_attr *msg, struct blob_attr *data);
-static void handle_button_complete(struct blob_attr *msg, struct blob_attr *data, int ret);
-
-static void button_free(struct button_timeout *b)
-{
-	uloop_timeout_cancel(&b->timeout);
-	list_del(&b->list);
-	free(b->data);
-	free(b->name);
-	free(b);
-}
-
-static void button_timeout_remove(char *button)
-{
-	struct button_timeout *b, *c;
-
-	if (!list_empty(&button_timer)) list_for_each_entry_safe(b, c, &button_timer, list) {
-		if (!strcmp(b->name, button))
-			button_free(b);
-	}
-}
-
-static char *hotplug_msg_find_var(struct blob_attr *msg, const char *name)
-{
-	struct blob_attr *cur;
-	int rem;
-
-	blobmsg_for_each_attr(cur, msg, rem) {
-		if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
-			continue;
-
-		if (strcmp(blobmsg_name(cur), name) != 0)
-			continue;
-
-		return blobmsg_data(cur);
-	}
-
-	return NULL;
-}
-
-static void mkdir_p(char *dir)
-{
-	char *l = strrchr(dir, '/');
-
-	if (l) {
-		*l = '\0';
-		mkdir_p(dir);
-		*l = '/';
-		mkdir(dir, 0755);
-	}
-}
-
-static void handle_makedev(struct blob_attr *msg, struct blob_attr *data)
-{
-	unsigned int oldumask = umask(0);
-	static struct blobmsg_policy mkdev_policy[2] = {
-		{ .type = BLOBMSG_TYPE_STRING },
-		{ .type = BLOBMSG_TYPE_STRING },
-	};
-	struct blob_attr *tb[2];
-	char *minor = hotplug_msg_find_var(msg, "MINOR");
-	char *major = hotplug_msg_find_var(msg, "MAJOR");
-	char *subsystem = hotplug_msg_find_var(msg, "SUBSYSTEM");
-
-	blobmsg_parse_array(mkdev_policy, 2, tb, blobmsg_data(data), blobmsg_data_len(data));
-	if (tb[0] && tb[1] && minor && major && subsystem) {
-		mode_t m = S_IFCHR;
-		char *d = strdup(blobmsg_get_string(tb[0]));
-
-		d = dirname(d);
-		mkdir_p(d);
-		free(d);
-
-		if (!strcmp(subsystem, "block"))
-			m = S_IFBLK;
-		mknod(blobmsg_get_string(tb[0]),
-				m | strtoul(blobmsg_data(tb[1]), NULL, 8),
-				makedev(atoi(major), atoi(minor)));
-	}
-	umask(oldumask);
-}
-
-static void handle_rm(struct blob_attr *msg, struct blob_attr *data)
-{
-	static struct blobmsg_policy rm_policy = {
-		.type = BLOBMSG_TYPE_STRING,
-	};
-	struct blob_attr *tb;
-
-	blobmsg_parse_array(&rm_policy, 1, &tb, blobmsg_data(data), blobmsg_data_len(data));
-	if (tb)
-		unlink(blobmsg_data(tb));
-}
-
-static void handle_exec(struct blob_attr *msg, struct blob_attr *data)
-{
-	char *argv[8];
-	struct blob_attr *cur;
-	int rem, fd;
-	int i = 0;
-
-	blobmsg_for_each_attr(cur, msg, rem)
-		setenv(blobmsg_name(cur), blobmsg_data(cur), 1);
-
-	blobmsg_for_each_attr(cur, data, rem) {
-		argv[i] = blobmsg_data(cur);
-		i++;
-		if (i == 7)
-			break;
-	}
-
-	if (debug < 3) {
-		fd = open("/dev/null", O_RDWR);
-		if (fd > -1) {
-			dup2(fd, STDIN_FILENO);
-			dup2(fd, STDOUT_FILENO);
-			dup2(fd, STDERR_FILENO);
-			if (fd > STDERR_FILENO)
-				close(fd);
-		}
-	}
-
-	if (i > 0) {
-		argv[i] = NULL;
-		execvp(argv[0], &argv[0]);
-	}
-	exit(-1);
-}
-
-static void handle_button_start(struct blob_attr *msg, struct blob_attr *data)
-{
-	char *button = hotplug_msg_find_var(msg, "BUTTON");
-
-	if (button)
-		button_timeout_remove(button);
-}
-
-static void handle_firmware(struct blob_attr *msg, struct blob_attr *data)
-{
-	char *dir = blobmsg_get_string(blobmsg_data(data));
-	char *file = hotplug_msg_find_var(msg, "FIRMWARE");
-	char *dev = hotplug_msg_find_var(msg, "DEVPATH");
-	struct stat s = { 0 };
-	char *path, loadpath[256], syspath[256];
-	int fw, src, load, len;
-	static char buf[4096];
-
-	DEBUG(2, "Firmware request for %s/%s\n", dir, file);
-
-	if (!file || !dir || !dev) {
-		ERROR("Request for unknown firmware %s/%s\n", dir, file);
-		exit(-1);
-	}
-
-	path = alloca(strlen(dir) + strlen(file) + 2);
-	sprintf(path, "%s/%s", dir, file);
-
-	if (stat(path, &s)) {
-		ERROR("Could not find firmware %s\n", path);
-		src = -1;
-		s.st_size = 0;
-		goto send_to_kernel;
-	}
-
-	src = open(path, O_RDONLY);
-	if (src < 0) {
-		ERROR("Failed to open %s\n", path);
-		s.st_size = 0;
-		goto send_to_kernel;
-	}
-
-send_to_kernel:
-	snprintf(loadpath, sizeof(loadpath), "/sys/%s/loading", dev);
-	load = open(loadpath, O_WRONLY);
-	if (!load) {
-		ERROR("Failed to open %s\n", loadpath);
-		exit(-1);
-	}
-	if (write(load, "1", 1) == -1) {
-		ERROR("Failed to write to %s\n", loadpath);
-		exit(-1);
-	}
-	close(load);
-
-	snprintf(syspath, sizeof(syspath), "/sys/%s/data", dev);
-	fw = open(syspath, O_WRONLY);
-	if (fw < 0) {
-		ERROR("Failed to open %s\n", syspath);
-		exit(-1);
-	}
-
-	len = s.st_size;
-	while (len) {
-		len = read(src, buf, sizeof(buf));
-		if (len <= 0)
-			break;
-
-		if (write(fw, buf, len) == -1) {
-			ERROR("failed to write firmware file %s/%s to %s\n", dir, file, dev);
-			break;
-		}
-	}
-
-	if (src >= 0)
-		close(src);
-	close(fw);
-
-	load = open(loadpath, O_WRONLY);
-	if (write(load, "0", 1) == -1)
-		ERROR("failed to write to %s\n", loadpath);
-	close(load);
-
-	DEBUG(2, "Done loading %s\n", path);
-
-	exit(-1);
-}
-
-enum {
-	HANDLER_MKDEV = 0,
-	HANDLER_RM,
-	HANDLER_EXEC,
-	HANDLER_BUTTON,
-	HANDLER_FW,
-};
-
-static struct cmd_handler {
-	char *name;
-	int atomic;
-	void (*handler)(struct blob_attr *msg, struct blob_attr *data);
-	void (*start)(struct blob_attr *msg, struct blob_attr *data);
-	void (*complete)(struct blob_attr *msg, struct blob_attr *data, int ret);
-} handlers[] = {
-	[HANDLER_MKDEV] = {
-		.name = "makedev",
-		.atomic = 1,
-		.handler = handle_makedev,
-	},
-	[HANDLER_RM] = {
-		.name = "rm",
-		.atomic = 1,
-		.handler = handle_rm,
-	},
-	[HANDLER_EXEC] = {
-		.name = "exec",
-		.handler = handle_exec,
-	},
-	[HANDLER_BUTTON] = {
-		.name = "button",
-		.handler = handle_exec,
-		.start = handle_button_start,
-		.complete = handle_button_complete,
-	},
-	[HANDLER_FW] = {
-		.name = "load-firmware",
-		.handler = handle_firmware,
-	},
-};
-
-static void queue_next(void)
-{
-	struct cmd_queue *c;
-
-	if (queue_proc.pending || list_empty(&cmd_queue))
-		return;
-
-	c = list_first_entry(&cmd_queue, struct cmd_queue, list);
-
-	queue_proc.pid = fork();
-	if (!queue_proc.pid) {
-		uloop_done();
-		c->handler(c->msg, c->data);
-		exit(0);
-	}
-	if (c->start)
-		c->start(c->msg, c->data);
-	list_del(&c->list);
-	if (c->complete)
-		current = c;
-	else
-		free(c);
-	if (queue_proc.pid <= 0) {
-		queue_next();
-		return;
-	}
-
-	uloop_process_add(&queue_proc);
-
-	DEBUG(4, "Launched hotplug exec instance, pid=%d\n", (int) queue_proc.pid);
-}
-
-static void queue_proc_cb(struct uloop_process *c, int ret)
-{
-	DEBUG(4, "Finished hotplug exec instance, pid=%d\n", (int) c->pid);
-
-	if (current) {
-		current->complete(current->msg, current->data, ret);
-		free(current);
-		current = NULL;
-	}
-	queue_next();
-}
-
-static void queue_add(struct cmd_handler *h, struct blob_attr *msg, struct blob_attr *data)
-{
-	struct cmd_queue *c = NULL;
-	struct blob_attr *_msg, *_data;
-
-	c = calloc_a(sizeof(struct cmd_queue),
-		&_msg, blob_pad_len(msg),
-		&_data, blob_pad_len(data),
-		NULL);
-
-	c->msg = _msg;
-	c->data = _data;
-
-	if (!c)
-		return;
-
-	memcpy(c->msg, msg, blob_pad_len(msg));
-	memcpy(c->data, data, blob_pad_len(data));
-	c->handler = h->handler;
-	c->complete = h->complete;
-	c->start = h->start;
-	list_add_tail(&c->list, &cmd_queue);
-	queue_next();
-}
-
-static void handle_button_timeout(struct uloop_timeout *t)
-{
-	struct button_timeout *b;
-	char seen[16];
-
-	b = container_of(t, struct button_timeout, timeout);
-	blob_buf_init(&button_buf, 0);
-	blobmsg_add_string(&button_buf, "BUTTON", b->name);
-	blobmsg_add_string(&button_buf, "ACTION", "timeout");
-	snprintf(seen, sizeof(seen), "%d", b->seen);
-	blobmsg_add_string(&button_buf, "SEEN", seen);
-	queue_add(&handlers[HANDLER_EXEC], button_buf.head, b->data);
-	button_free(b);
-}
-
-static void handle_button_complete(struct blob_attr *msg, struct blob_attr *data, int ret)
-{
-	char *name = hotplug_msg_find_var(msg, "BUTTON");
-	struct button_timeout *b;
-	int timeout = ret >> 8;
-
-	if (!timeout)
-		return;
-
-	b = malloc(sizeof(*b));
-	if (!b || !name)
-		return;
-
-	memset(b, 0, sizeof(*b));
-
-	b->data = malloc(blob_pad_len(data));
-	b->name = strdup(name);
-	b->seen = timeout;
-
-	memcpy(b->data, data, blob_pad_len(data));
-	b->timeout.cb = handle_button_timeout;
-
-	uloop_timeout_set(&b->timeout, timeout * 1000);
-	list_add(&b->list, &button_timer);
-}
-
-static const char* rule_handle_var(struct json_script_ctx *ctx, const char *name, struct blob_attr *vars)
-{
-	const char *str, *sep;
-
-	if (!strcmp(name, "DEVICENAME") || !strcmp(name, "DEVNAME")) {
-		str = json_script_find_var(ctx, vars, "DEVPATH");
-		if (!str)
-			return NULL;
-
-		sep = strrchr(str, '/');
-		if (sep)
-			return sep + 1;
-
-		return str;
-	}
-
-	return NULL;
-}
-
-static struct json_script_file *
-rule_handle_file(struct json_script_ctx *ctx, const char *name)
-{
-	json_object *obj;
-
-	obj = json_object_from_file((char*)name);
-	if (!obj)
-		return NULL;
-
-	blob_buf_init(&script, 0);
-	blobmsg_add_json_element(&script, "", obj);
-
-	return json_script_file_from_blobmsg(name, blob_data(script.head), blob_len(script.head));
-}
-
-static void rule_handle_command(struct json_script_ctx *ctx, const char *name,
-				struct blob_attr *data, struct blob_attr *vars)
-{
-	struct blob_attr *cur;
-	int rem, i;
-
-	if (debug > 3) {
-		DEBUG(4, "Command: %s", name);
-		blobmsg_for_each_attr(cur, data, rem)
-			DEBUG(4, " %s", (char *) blobmsg_data(cur));
-		DEBUG(4, "\n");
-
-		DEBUG(4, "Message:");
-		blobmsg_for_each_attr(cur, vars, rem)
-			DEBUG(4, " %s=%s", blobmsg_name(cur), (char *) blobmsg_data(cur));
-		DEBUG(4, "\n");
-	}
-
-	for (i = 0; i < ARRAY_SIZE(handlers); i++)
-		if (!strcmp(handlers[i].name, name)) {
-			if (handlers[i].atomic)
-				handlers[i].handler(vars, data);
-			else
-				queue_add(&handlers[i], vars, data);
-			break;
-		}
-
-	if (last_event.cb)
-		uloop_timeout_set(&last_event, HOTPLUG_WAIT);
-}
-
-static void rule_handle_error(struct json_script_ctx *ctx, const char *msg,
-				struct blob_attr *context)
-{
-	char *s;
-
-	s = blobmsg_format_json(context, false);
-	ERROR("ERROR: %s in block: %s\n", msg, s);
-	free(s);
-}
-
-static struct json_script_ctx jctx = {
-	.handle_var = rule_handle_var,
-	.handle_error = rule_handle_error,
-	.handle_command = rule_handle_command,
-	.handle_file = rule_handle_file,
-};
-
-static void hotplug_handler_debug(struct blob_attr *data)
-{
-	char *str;
-
-	if (debug < 3)
-		return;
-
-	str = blobmsg_format_json(data, true);
-	DEBUG(3, "%s\n", str);
-	free(str);
-}
-
-static void hotplug_handler(struct uloop_fd *u, unsigned int ev)
-{
-	int i = 0;
-	static char buf[4096];
-	int len = recv(u->fd, buf, sizeof(buf), MSG_DONTWAIT);
-	void *index;
-	if (len < 1)
-		return;
-
-	blob_buf_init(&b, 0);
-	index = blobmsg_open_table(&b, NULL);
-	while (i < len) {
-		int l = strlen(buf + i) + 1;
-		char *e = strstr(&buf[i], "=");
-
-		if (e) {
-			*e = '\0';
-			blobmsg_add_string(&b, &buf[i], &e[1]);
-		}
-		i += l;
-	}
-	blobmsg_close_table(&b, index);
-	hotplug_handler_debug(b.head);
-	json_script_run(&jctx, rule_file, blob_data(b.head));
-}
-
-static struct uloop_fd hotplug_fd = {
-	.cb = hotplug_handler,
-};
-
-void hotplug_last_event(uloop_timeout_handler handler)
-{
-	last_event.cb = handler;
-	if (handler)
-		uloop_timeout_set(&last_event, HOTPLUG_WAIT);
-	else
-		uloop_timeout_cancel(&last_event);
-}
-
-void hotplug(char *rules)
-{
-	struct sockaddr_nl nls;
-	int nlbufsize = 512 * 1024;
-
-	rule_file = strdup(rules);
-	memset(&nls,0,sizeof(struct sockaddr_nl));
-	nls.nl_family = AF_NETLINK;
-	nls.nl_pid = getpid();
-	nls.nl_groups = -1;
-
-	if ((hotplug_fd.fd = socket(PF_NETLINK, SOCK_DGRAM | SOCK_CLOEXEC, NETLINK_KOBJECT_UEVENT)) == -1) {
-		ERROR("Failed to open hotplug socket: %s\n", strerror(errno));
-		exit(1);
-	}
-	if (bind(hotplug_fd.fd, (void *)&nls, sizeof(struct sockaddr_nl))) {
-		ERROR("Failed to bind hotplug socket: %s\n", strerror(errno));
-		exit(1);
-	}
-
-	if (setsockopt(hotplug_fd.fd, SOL_SOCKET, SO_RCVBUFFORCE, &nlbufsize, sizeof(nlbufsize)))
-		ERROR("Failed to resize receive buffer: %s\n", strerror(errno));
-
-	json_script_init(&jctx);
-	queue_proc.cb = queue_proc_cb;
-	uloop_fd_add(&hotplug_fd, ULOOP_READ);
-}
-
-int hotplug_run(char *rules)
-{
-	uloop_init();
-	hotplug(rules);
-	uloop_run();
-
-	return 0;
-}
-
-void hotplug_shutdown(void)
-{
-	uloop_fd_delete(&hotplug_fd);
-	close(hotplug_fd.fd);
-}
diff --git a/plug/hotplug.h b/plug/hotplug.h
deleted file mode 100644
index 2a44442..0000000
--- a/plug/hotplug.h
+++ /dev/null
@@ -1,25 +0,0 @@
-/*
- * Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
- * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License version 2.1
- * as published by the Free Software Foundation
- *
- * 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.
- */
-
-#ifndef __PROCD_HOTPLUG_H
-#define __PROCD_HOTPLUG_H
-
-#include <libubox/uloop.h>
-
-void hotplug(char *rules);
-int hotplug_run(char *rules);
-void hotplug_shutdown(void);
-void hotplug_last_event(uloop_timeout_handler handler);
-
-#endif
diff --git a/plug/udevtrigger.c b/plug/udevtrigger.c
deleted file mode 100644
index 5013189..0000000
--- a/plug/udevtrigger.c
+++ /dev/null
@@ -1,264 +0,0 @@
-/*
- * 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 <stdio.h>
-#include <stdbool.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>
-#include <string.h>
-
-#define PATH_SIZE 512
-
-#ifndef strlcpy
-#define strlcpy(d,s,l) (strncpy(d,s,l), (d)[(l)-1] = '\0')
-#endif
-
-#ifndef strlcat
-#define strlcat(d,s,l) strncat(d,s,(l)-strlen(d)-1)
-#endif
-
-static int verbose;
-static int dry_run;
-
-static 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 bool device_has_attribute(const char *path, const char *attr,
-				 mode_t mode)
-{
-	char filename[PATH_SIZE];
-	struct stat statbuf;
-
-	strlcpy(filename, path, sizeof(filename));
-	strlcat(filename, attr, sizeof(filename));
-
-	if (stat(filename, &statbuf) < 0)
-		return false;
-
-	if (!(statbuf.st_mode & mode))
-		return false;
-
-	return true;
-}
-
-static int device_list_insert(const char *path)
-{
-	char devpath[PATH_SIZE];
-	struct stat statbuf;
-
-	dbg("add '%s'" , path);
-
-	/* we only have a device, if we have a dev and an uevent file */
-	if (!device_has_attribute(path, "/dev", S_IRUSR) ||
-	    !device_has_attribute(path, "/uevent", 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_subdir(const char *base, const char *subdir,
-		        bool insert, int depth)
-{
-	DIR *dir;
-	struct dirent *dent;
-
-	dir = opendir(base);
-	if (dir == NULL)
-		return;
-
-	for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
-		char dirname[PATH_SIZE];
-
-		if (dent->d_name[0] == '.')
-			continue;
-
-		strlcpy(dirname, base, sizeof(dirname));
-		strlcat(dirname, "/", sizeof(dirname));
-		strlcat(dirname, dent->d_name, sizeof(dirname));
-
-		if (insert) {
-			int err;
-
-			err = device_list_insert(dirname);
-			if (err)
-				continue;
-		}
-
-		if (subdir)
-			strlcat(dirname, subdir, sizeof(base));
-
-		if (depth)
-			scan_subdir(dirname, NULL, true, depth - 1);
-	}
-
-	closedir(dir);
-}
-
-int main(int argc, char *argv[], char *envp[])
-{
-	struct stat statbuf;
-	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_subdir("/sys/bus", "/devices", false, 1);
-	scan_subdir("/sys/class", NULL, false, 1);
-
-	/* scan "block" if it isn't a "class" */
-	if (stat("/sys/class/block", &statbuf) != 0)
-		scan_subdir("/sys/block", NULL, true, 1);
-
-exit:
-
-	closelog();
-	return 0;
-}