[PATCH] first stupid try for a rule compose gui

On Mon, Mar 15, 2004 at 09:28:17PM +0100, Kay Sievers wrote:
> Here is a first simple and pretty stupid try to make a simple tool for
> composing of a udev rule.
>
> It reads the udevdb to get all currently handled devices and presents a
> list, where you can choose the device to compose the rule for.
>
> The composed rule is just printed out in a window, nothing else by now.
>
> Do we want something like this?
> Nevermind, I always wanted to know, how this newt thing works :)

Here is the next step, I still can't sleep and there are to many patches
pending to make something useful :)
Cause nobody wanted to play with me, I've made a screenshot.
The device list is sorted in alphabetical order now and if there are only
a few recently discovered devices, they are placed on top of the list.

For those who want to have a look:

  http://vrfy.org/projects/udev/udevruler.png

The patch applies on top of today's mmap() patch. The db format is
changed to have the file and line number of the applied rule. So it
should be easy to edit the matching rule with this beast. It compiles
with "make all udevruler".

1 files changed, 503 insertions, 0 deletions

diff --git a/udevruler.c b/udevruler.c
new file mode 100644
index 0000000000..b66940e944
--- /dev/null
+++ b/udevruler.c
@@ -0,0 +1,503 @@
+/*
+ * udevruler.c - simple udev-rule composer
+ *
+ * Reads the udev-db to get all currently known devices and
+ * scans the sysfs device chain for the choosen device to select attributes
+ * to compose a rule for the udev.rules file to uniquely name this device.
+ *
+ * Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
+ *
+ *	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.,
+ *	675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+#include <newt.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stddef.h>
+#include <ctype.h>
+#include <time.h>
+#include <unistd.h>
+
+#include "udev.h"
+#include "udev_lib.h"
+#include "udev_version.h"
+#include "udevdb.h"
+#include "logging.h"
+#include "libsysfs/sysfs.h"
+#include "list.h"
+
+#ifdef LOG
+unsigned char logname[LOGNAME_SIZE];
+void log_message(int level, const char *format, ...)
+{
+	va_list args;
+
+	if (!udev_log)
+		return;
+
+	va_start(args, format);
+	vsyslog(level, format, args);
+	va_end(args);
+}
+#endif
+
+static char *dev_blacklist[] = {
+	"tty",
+	"pty",
+	"zero",
+	"null",
+	"kmsg",
+	"rtc",
+	"timer",
+	"full",
+	"kmem",
+	"mem",
+	"random",
+	"urandom",
+	"console",
+	"port",
+	""
+};
+
+struct device {
+	struct list_head list;
+	char name[NAME_SIZE];
+	char devpath[DEVPATH_SIZE];
+	int config_line;
+	char config_file[NAME_SIZE];
+	time_t config_time;
+	int added;
+};
+
+LIST_HEAD(device_list);
+int device_count;
+
+/* callback for database dump */
+static int add_record(char *path, struct udevice *udev)
+{
+	struct device *dev;
+	struct device *loop_dev;
+	int i = 0;
+
+	while (dev_blacklist[i][0] != '\0') {
+		if (strncmp(udev->name, dev_blacklist[i], strlen(dev_blacklist[i])) == 0)
+			goto exit;
+		i++;
+	}
+
+	dev = malloc(sizeof(struct device));
+	if (dev == NULL) {
+		printf("error malloc\n");
+		exit(2);
+	}
+	strfieldcpy(dev->name, udev->name);
+	strfieldcpy(dev->devpath, path);
+	dev->config_line = udev->config_line;
+	strfieldcpy(dev->config_file, udev->config_file);
+	dev->config_time = udev->config_time;
+	dev->added = 0;
+
+	/* sort in lexical order */
+	list_for_each_entry(loop_dev, &device_list, list) {
+		if (strcmp(loop_dev->name, dev->name) > 0) {
+			break;
+		}
+	}
+
+	list_add_tail(&dev->list, &loop_dev->list);
+	device_count++;
+
+exit:
+	return 0;
+}
+
+/* get all devices from udev database */
+static int get_all_devices(void)
+{
+	int retval;
+
+	device_count = 0;
+	INIT_LIST_HEAD(&device_list);
+
+	retval = udevdb_open_ro();
+	if (retval != 0) {
+		printf("unable to open udev database\n");
+		exit(1);
+	}
+
+	udevdb_call_foreach(add_record);
+	udevdb_exit();
+
+	return 0;
+}
+
+struct attribute {
+	struct list_head list;
+	int level;
+	char key[NAME_SIZE];
+};
+
+LIST_HEAD(attribute_list);
+int attribute_count;
+
+static int add_attribute(const char *key, int level)
+{
+	struct attribute *attr;
+
+	dbg("add attribute '%s'", key);
+	attr = malloc(sizeof(struct attribute));
+	if (attr == NULL) {
+		printf("error malloc\n");
+		exit(2);
+	}
+
+	strfieldcpy(attr->key, key);
+	attr->level = level;
+	list_add_tail(&attr->list, &attribute_list);
+	attribute_count++;
+	return 0;
+}
+
+static int add_all_attributes(const char *path, int level)
+{
+	struct dlist *attributes;
+	struct sysfs_attribute *attr;
+	struct sysfs_directory *sysfs_dir;
+	char value[NAME_SIZE];
+	char key[NAME_SIZE];
+	int len;
+	int retval = 0;
+
+	dbg("look at '%s', level %i", path, level);
+
+	sysfs_dir = sysfs_open_directory(path);
+	if (sysfs_dir == NULL)
+		return -1;
+
+	attributes = sysfs_get_dir_attributes(sysfs_dir);
+	if (attributes == NULL) {
+		retval = -1;
+		return 0;
+	}
+
+	dlist_for_each_data(attributes, attr, struct sysfs_attribute)
+		if (attr->value != NULL) {
+			dbg("found attribute '%s'", attr->name);
+			strfieldcpy(value, attr->value);
+			len = strlen(value);
+			if (len == 0)
+				continue;
+
+			/* skip very long attributes */
+			if (len > 40)
+				continue;
+
+			/* remove trailing newline */
+			if (value[len-1] == '\n') {
+				value[len-1] = '\0';
+				len--;
+			}
+
+			/* skip nonprintable values */
+			while (len) {
+				if (!isprint(value[len-1]))
+					break;
+				len--;
+			}
+			if (len == 0) {
+				sprintf(key, "SYSFS{%s}=\"%s\"", attr->name, value);
+				add_attribute(key, level);
+			}
+		}
+
+	return 0;
+}
+
+static int get_all_attributes(char *path)
+{
+	struct sysfs_class_device *class_dev;
+	struct sysfs_class_device *class_dev_parent;
+	struct sysfs_attribute *attr;
+	struct sysfs_device *sysfs_dev;
+	struct sysfs_device *sysfs_dev_parent;
+	char key[NAME_SIZE];
+	int retval = 0;
+	int level = 0;
+
+	attribute_count = 0;
+	INIT_LIST_HEAD(&attribute_list);
+
+	/*  get the class dev */
+	class_dev = sysfs_open_class_device_path(path);
+	if (class_dev == NULL) {
+		dbg("couldn't get the class device");
+		return -1;
+	}
+
+	/* read the 'dev' file for major/minor*/
+	attr = sysfs_get_classdev_attr(class_dev, "dev");
+	if (attr == NULL) {
+		dbg("couldn't get the \"dev\" file");
+		retval = -1;
+		goto exit;
+	}
+
+	sysfs_close_attribute(attr);
+
+	/* open sysfs class device directory and get all attributes */
+	if (add_all_attributes(class_dev->path, level) != 0) {
+		dbg("couldn't open class device directory");
+		retval = -1;
+		goto exit;
+	}
+	level++;
+
+	/* get the device link (if parent exists look here) */
+	class_dev_parent = sysfs_get_classdev_parent(class_dev);
+	if (class_dev_parent != NULL) {
+		//sysfs_close_class_device(class_dev);
+		class_dev = class_dev_parent;
+	}
+	sysfs_dev = sysfs_get_classdev_device(class_dev);
+
+	/* look the device chain upwards */
+	while (sysfs_dev != NULL) {
+		if (sysfs_dev->bus[0] != '\0') {
+			add_attribute("", level);
+			sprintf(key, "BUS=\"%s\"", sysfs_dev->bus);
+			add_attribute(key, level);
+			sprintf(key, "ID=\"%s\"", sysfs_dev->bus_id);
+			add_attribute(key, level);
+
+			/* open sysfs device directory and print all attributes */
+			add_all_attributes(sysfs_dev->path, level);
+		}
+		level++;
+
+		sysfs_dev_parent = sysfs_get_device_parent(sysfs_dev);
+		if (sysfs_dev_parent == NULL)
+			break;
+
+		//sysfs_close_device(sysfs_dev);
+		sysfs_dev = sysfs_dev_parent;
+	}
+	sysfs_close_device(sysfs_dev);
+
+exit:
+	//sysfs_close_class_device(class_dev);
+	return retval;
+}
+
+
+int main(int argc, char *argv[]) {
+	newtComponent lbox, run, lattr;
+	newtComponent quit, form, answer;
+	newtGrid grid, grid2;
+	char roottext[81];
+	char path[NAME_SIZE];
+	struct device *dev;
+	time_t time_last;
+	int count_last;
+
+	newtInit();
+	newtCls();
+
+	newtWinMessage("udevruler", "Ok",
+		       "This program lets you select a device currently present "
+		       "on the system and you may choose the attributes to uniquely "
+		       "name the device with a udev rule.\n"
+		       "No configuration will be changed, it just prints the rule "
+		       "to place in a udev.rules configuration file. The \"%k\" in the "
+		       "NAME key of the printed rule may be replaced by the name the "
+		       "node should have.");
+
+	init_logging("udevruler");
+	udev_init_config();
+	get_all_devices();
+
+	lbox = newtListbox(2, 1, 10, NEWT_FLAG_SCROLL | NEWT_FLAG_RETURNEXIT);
+
+	/* look for last discovered device */
+	time_last = 0;
+	list_for_each_entry(dev, &device_list, list)
+		if (dev->config_time > time_last)
+			time_last = dev->config_time;
+
+	/* skip if more than 16 recent devices */
+	count_last = 0;
+	list_for_each_entry(dev, &device_list, list) {
+		if (dev->config_time < time_last - 10)
+			continue;
+		count_last++;
+	}
+
+	/* add devices up to 10 seconds older than the last one */
+	if (count_last < 16) {
+		newtListboxAppendEntry(lbox, "--- last dicovered ---", NULL);
+		list_for_each_entry(dev, &device_list, list) {
+			if (dev->config_time < time_last - 10)
+				continue;
+
+			dbg("%s %i", dev->name, dev->config_line);
+			newtListboxAppendEntry(lbox, dev->name, (void*) dev);
+			dev->added = 1;
+		}
+		newtListboxAppendEntry(lbox, "", NULL);
+	}
+
+	/* add devices not catched by a rule */
+	newtListboxAppendEntry(lbox, "--- not configured by a rule ---", NULL);
+	list_for_each_entry(dev, &device_list, list) {
+		if (dev->added)
+			continue;
+
+		if (dev->config_line != 0)
+			continue;
+
+		dbg("%s %i", dev->name, dev->config_line);
+		newtListboxAppendEntry(lbox, dev->name, (void*) dev);
+		dev->added = 1;
+	}
+	newtListboxAppendEntry(lbox, "", NULL);
+
+	/* add remaining devices */
+	newtListboxAppendEntry(lbox, "--- configured by a rule ---", NULL);
+	list_for_each_entry(dev, &device_list, list) {
+		if (dev->added)
+			continue;
+
+		dbg("%s %i", dev->name, dev->config_line);
+		newtListboxAppendEntry(lbox, dev->name, (void*) dev);
+	}
+
+	newtPushHelpLine("    <Tab>/<Alt-Tab> between elements  |    Use <Enter> to select a device");
+	snprintf(roottext, sizeof(roottext), "simple udev rule composer, version %s, (c) 2004 can't sleep team", UDEV_VERSION);
+	roottext[sizeof(roottext)-1] = '\0';
+	newtDrawRootText(0, 0, roottext);
+
+	form = newtForm(NULL, NULL, 0);
+	grid = newtCreateGrid(1, 2);
+	grid2 = newtButtonBar("Select device", &run, "Quit", &quit, NULL);
+	newtGridSetField(grid, 0, 0, NEWT_GRID_COMPONENT, lbox, 1, 0, 1, 0, NEWT_ANCHOR_TOP, 0);
+	newtGridSetField(grid, 0, 1, NEWT_GRID_SUBGRID, grid2, 0, 1, 0, 0, NEWT_ANCHOR_TOP, 0);
+	newtFormAddComponents(form, lbox, run, quit, NULL);
+	newtGridWrappedWindow(grid,"Choose the device for which to compose a rule");
+	newtGridFree(grid, 1);
+
+	while (1) {
+		struct attribute *attr;
+		newtComponent ok, back, form2, answer2, text;
+		newtGrid grid3, grid4;
+		int i;
+		int numitems;
+		struct attribute **selattr;
+		char text_rule[80];
+
+		answer = newtRunForm(form);
+		if (answer == quit)
+			break;
+
+		dev = (struct device *) newtListboxGetCurrent(lbox);
+		if (dev == NULL)
+			continue;
+
+		if (dev->config_line > 0)
+			snprintf(text_rule, sizeof(text_rule),
+				 "The device is handled by a rule in the file '%s', line %i.",
+				 dev->config_file, dev->config_line);
+		else
+			strcpy(text_rule, "The device was not handled by a rule.");
+
+		strfieldcpy(path, sysfs_path);
+		strfieldcat(path, dev->devpath);
+		dbg("look at sysfs device '%s'", path);
+		get_all_attributes(path);
+
+		grid3 = newtCreateGrid(1, 3);
+		form2 = newtForm(NULL, NULL, 0);
+		grid4 = newtButtonBar("Ok", &ok, "Back", &back, NULL);
+
+		lattr = newtListbox(-1, -1, 10, NEWT_FLAG_MULTIPLE | NEWT_FLAG_BORDER | NEWT_FLAG_RETURNEXIT);
+		list_for_each_entry(attr, &attribute_list, list)
+			newtListboxAddEntry(lattr, attr->key, (void *) attr);
+
+		text = newtTextbox(-1, -1, 50, 2, NEWT_FLAG_WRAP);
+		newtTextboxSetText(text, text_rule);
+
+		newtGridSetField(grid3, 0, 0, NEWT_GRID_COMPONENT, lattr, 0, 0, 0, 1, 0, 0);
+		newtGridSetField(grid3, 0, 1, NEWT_GRID_COMPONENT, text, 0, 0, 0, 1, 0, 0);
+		newtGridSetField(grid3, 0, 2, NEWT_GRID_SUBGRID, grid4, 0, 1, 0, 0, NEWT_ANCHOR_TOP, 0);
+
+		newtFormAddComponents(form2, text, lattr, ok, back, NULL);
+		newtGridWrappedWindow(grid3, "Select one ore more attributes within one section with the space bar");
+		newtGridFree(grid3, 1);
+
+		while (1) {
+			char rule[255];
+			int onelevel;
+			int skipped;
+
+			answer2 = newtRunForm(form2);
+			if (answer2 == back)
+				break;
+
+			selattr = (struct attribute **) newtListboxGetSelection(lattr, &numitems);
+			if (selattr == NULL)
+				continue;
+
+			rule[0] = '\0';
+			onelevel = -1;
+			skipped = 0;
+			for (i = 0; i < numitems; i++) {
+				if (selattr[i]->key[0] == '\0')
+					continue;
+
+				if (onelevel != -1) {
+					if (onelevel != selattr[i]->level) {
+						skipped = 1;
+						continue;
+					}
+				} else {
+					onelevel = selattr[i]->level;
+				}
+
+				dbg("'%s'\n", selattr[i]->key);
+				strfieldcat(rule, selattr[i]->key);
+				strfieldcat(rule, ", ");
+			}
+			if (skipped) {
+				newtWinMessage("error", "Ok", "Please select only attributes within one section");
+				continue;
+			}
+
+			if (strlen(rule) > 200) {
+				newtWinMessage("error", "Ok", "The line is too long, please select fewer attributes.");
+			} else {
+				if (rule[0] == '\0')
+					continue;
+
+				strfieldcat(rule, "NAME=\"%k\"");
+				newtWinMessage("the rule to place in config file", "Ok", rule);
+			}
+		}
+
+		newtPopWindow();
+	}
+
+	newtPopWindow();
+	newtFormDestroy(form);
+	newtFinished();
+	return 0;
+}