From dd64e26b0c88892b367f57c4c7a7484e35641c7c Mon Sep 17 00:00:00 2001
From: "greg@kroah.com" <greg@kroah.com>
Date: Wed, 24 Mar 2004 20:46:58 -0800
Subject: [PATCH] [PATCH] add /etc/dev.d/ support for udev add and remove
 events.

---
 Makefile      |   1 +
 dev_d.c       | 117 ++++++++++++++++++++++++++++++++++++++++++++++++++
 udev-add.c    |   4 +-
 udev-remove.c |   1 +
 udev.h        |   1 +
 5 files changed, 123 insertions(+), 1 deletion(-)
 create mode 100644 dev_d.c

diff --git a/Makefile b/Makefile
index bd511a83..f20337bb 100644
--- a/Makefile
+++ b/Makefile
@@ -209,6 +209,7 @@ OBJS =	udev_lib.o	\
 	udevdb.o	\
 	namedev.o	\
 	namedev_parse.o	\
+	dev_d.o		\
 	$(SYSFS)	\
 	$(TDB)
 
diff --git a/dev_d.c b/dev_d.c
new file mode 100644
index 00000000..36bee33b
--- /dev/null
+++ b/dev_d.c
@@ -0,0 +1,117 @@
+/*
+ * dev.d multipleer
+ * 
+ * Copyright (C) 2004 Greg Kroah-Hartman <greg@kroah.com>
+ *
+ *	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.
+ * 
+ * Based on the klibc version of hotplug written by:
+ *	Author(s) Christian Borntraeger <cborntra@de.ibm.com>
+ * which was based on the shell script written by:
+ *	Greg Kroah-Hartman <greg@kroah.com>
+ *
+ */
+
+/* 
+ * This essentially emulates the following shell script logic in C:
+	DIR="/etc/dev.d"
+	export DEVNODE="whatever_dev_name_udev_just_gave"
+	for I in "${DIR}/$DEVNODE/"*.dev "${DIR}/$1/"*.dev "${DIR}/default/"*.dev ; do
+		if [ -f $I ]; then $I $1 ; fi
+	done
+	exit 1;
+ */
+
+#include <dirent.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+#include "udev.h"
+#include "udev_lib.h"
+#include "logging.h"
+
+#define HOTPLUGDIR	"/etc/dev.d"
+#define COMMENT_PREFIX	'#'
+
+static void run_program(char *name)
+{
+	pid_t pid;
+
+	dbg("running %s", name);
+
+	pid = fork();
+
+	if (pid < 0) {
+		perror("fork");
+		return;
+	} 
+	
+	if (pid > 0) {
+		wait(NULL);
+		return;
+	}
+
+	execv(name, main_argv);
+	exit(1);
+}
+
+static void execute_dir (char *dirname)
+{
+	DIR *directory;
+	struct dirent *entry;
+	char filename[256];
+
+	dbg("opening %s", dirname);
+	directory = opendir(dirname);
+	if (!directory)
+		return;
+
+	while ((entry = readdir(directory))) {
+		if (entry->d_name[0] == '\0')
+			break;
+		/* Don't run the files '.', '..', or hidden files, 
+		 * or files that start with a '#' */
+		if ((entry->d_name[0] == '.') ||
+		    (entry->d_name[0] == COMMENT_PREFIX))
+			continue;
+
+		/* FIXME - need to use file_list_insert() here to run these in sorted order... */
+		snprintf(filename, sizeof(filename), "%s%s", dirname, entry->d_name);
+		filename[sizeof(filename)-1] = '\0';
+		run_program(filename);
+	}
+
+	closedir(directory);
+}
+
+/* runs files in these directories in order:
+ * 	name given by udev
+ * 	subsystem
+ * 	default
+ */
+void dev_d_send(struct udevice *dev, char *subsystem)
+{
+	char dirname[256];
+	char devnode[NAME_SIZE];
+
+	strfieldcpy(devnode, udev_root);
+	strfieldcat(devnode, dev->name);
+	setenv("DEVNODE", devnode, 1);
+
+	snprintf(dirname, sizeof(dirname), HOTPLUGDIR "/%s/", dev->name);
+	dirname[sizeof(dirname)-1] = '\0';
+	execute_dir(dirname);
+
+	snprintf(dirname, sizeof(dirname), HOTPLUGDIR "/%s/", subsystem);
+	dirname[sizeof(dirname)-1] = '\0';
+	execute_dir(dirname);
+
+	strcpy(dirname, HOTPLUGDIR "/default/");
+	execute_dir(dirname);
+}
+
diff --git a/udev-add.c b/udev-add.c
index 2bd16014..94a423dc 100644
--- a/udev-add.c
+++ b/udev-add.c
@@ -417,8 +417,10 @@ int udev_add_device(char *path, char *subsystem, int fake)
 	dbg("name='%s'", dev.name);
 	retval = create_node(&dev, fake);
 
-	if ((retval == 0) && (!fake))
+	if ((retval == 0) && (!fake)) {
+		dev_d_send(&dev, subsystem);
 		sysbus_send_create(&dev, path);
+	}
 
 exit:
 	if (class_dev)
diff --git a/udev-remove.c b/udev-remove.c
index d9097134..dc6fcfc3 100644
--- a/udev-remove.c
+++ b/udev-remove.c
@@ -150,6 +150,7 @@ int udev_remove_device(char *path, char *subsystem)
 	dbg("name is '%s'", dev.name);
 	udevdb_delete_dev(path);
 
+	dev_d_send(&dev, subsystem);
 	sysbus_send_remove(dev.name, path);
 
 	retval = delete_node(&dev);
diff --git a/udev.h b/udev.h
index 16a212cd..eb42edce 100644
--- a/udev.h
+++ b/udev.h
@@ -65,6 +65,7 @@ extern int udev_add_device(char *path, char *subsystem, int fake);
 extern int udev_remove_device(char *path, char *subsystem);
 extern void udev_init_config(void);
 extern int parse_get_pair(char **orig_string, char **left, char **right);
+extern void dev_d_send(struct udevice *dev, char *subsystem);
 
 extern char **main_argv;
 extern char **main_envp;
-- 
2.39.5