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authorkay.sievers@vrfy.org <kay.sievers@vrfy.org>2004-01-19 19:46:26 -0800
committerGreg KH <gregkh@suse.de>2005-04-26 21:13:17 -0700
commitbe9b51f6638d66025ebde1ca154ae9180383409c (patch)
tree86b66fd8da31c21c63d27fde454af1c5a33d1253
parent765cbd97599d943adc73d03f4c91bd7cf7ef7fab (diff)
[PATCH] udev - program to query all device attributes to build a rule
On Sun, Jan 18, 2004 at 07:30:50AM +0100, Kay Sievers wrote: > Hi, > here is a small program to query all attributes of a device and > print these in the udev key format. It may help to get the keys to > define a rule. Fixed a typo - the sysfs_device is right now. USB FLash Reader: kay@pim:~/src/udev.kay$ extras/udevinfo/udevinfo /sys/block/sda/sda1 device '/sys/block/sda/sda1' has major:minor 8:1 looking at class device '/sys/block/sda/sda1': SYSFS_dev="8:1" SYSFS_start="32" SYSFS_size="160" SYSFS_stat=" 0 0 0 0" follow class device's "device" link '/sys/block/sda': BUS="scsi" ID="57:0:0:0" SYSFS_detach_state="0" SYSFS_type="0" SYSFS_device_blocked="0" SYSFS_queue_depth="1" SYSFS_scsi_level="3" SYSFS_vendor="SMSC " SYSFS_model="USB 2 HS-CF" SYSFS_rev="1.25" SYSFS_online="1"
-rw-r--r--extras/udevinfo/Makefile14
-rw-r--r--extras/udevinfo/udevinfo.c132
2 files changed, 146 insertions, 0 deletions
diff --git a/extras/udevinfo/Makefile b/extras/udevinfo/Makefile
new file mode 100644
index 0000000000..f31c8c11e9
--- /dev/null
+++ b/extras/udevinfo/Makefile
@@ -0,0 +1,14 @@
+PROG=udevinfo
+LD=$(CC)
+OBJS=udevinfo.o
+
+all: $(PROG)
+
+clean:
+ rm -f $(PROG) $(OBJS)
+
+$(PROG): $(OBJS)
+ $(LD) $(LDFLAGS) -o $(PROG) $(CRT0) $(OBJS) $(SYSFS)
+
+me:
+ cd ../..; make EXTRAS=extras/udevinfo
diff --git a/extras/udevinfo/udevinfo.c b/extras/udevinfo/udevinfo.c
new file mode 100644
index 0000000000..4f229cd376
--- /dev/null
+++ b/extras/udevinfo/udevinfo.c
@@ -0,0 +1,132 @@
+/*
+ * udevinfo - fetches attributes for a 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 <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+
+#include "libsysfs.h"
+
+
+# define VALUE_SIZE 200
+
+char **main_argv;
+char **main_envp;
+
+static int print_all_attributes(char *path)
+{
+ struct dlist *attributes;
+ struct sysfs_attribute *attr;
+ struct sysfs_directory *sysfs_dir;
+ char value[VALUE_SIZE];
+ int len;
+ int retval = 0;
+
+ sysfs_dir = sysfs_open_directory(path);
+ if (sysfs_dir == NULL)
+ return -1;
+
+ attributes = sysfs_get_dir_attributes(sysfs_dir);
+ if (attributes == NULL) {
+ retval = -1;
+ goto exit;
+ }
+
+ dlist_for_each_data(attributes, attr, struct sysfs_attribute) {
+ if (attr->value != NULL) {
+ strncpy(value, attr->value, VALUE_SIZE);
+ len = strlen(value);
+ if (value[len-1] == '\n')
+ value[len-1] = '\0';
+ printf(" SYSFS_%s=\"%s\"\n", attr->name, value);
+ }
+ }
+ printf("\n");
+
+exit:
+ sysfs_close_directory(sysfs_dir);
+
+ return retval;
+}
+
+int main(int argc, char **argv, char **envp)
+{
+ main_argv = argv;
+ main_envp = envp;
+ struct sysfs_class_device *class_dev;
+ struct sysfs_class_device *class_dev_parent;
+ struct sysfs_attribute *attr;
+ struct sysfs_device *sysfs_device;
+ char *path;
+ int retval = 0;
+
+ if (argc != 2) {
+ printf("Usage: udevinfo <sysfs_device_path>\n");
+ return -1;
+ }
+ path = argv[1];
+
+ /* get the class dev */
+ class_dev = sysfs_open_class_device_path(path);
+ if (class_dev == NULL) {
+ printf("couldn't get the class device\n");
+ return -1;
+ }
+
+ /* read the 'dev' file for major/minor*/
+ attr = sysfs_get_classdev_attr(class_dev, "dev");
+ if (attr == NULL) {
+ printf("couldn't get the \"dev\" file\n");
+ retval = -1;
+ goto exit;
+ }
+ printf("\ndevice '%s' has major:minor %s\n", class_dev->path, attr->value);
+ sysfs_close_attribute(attr);
+
+ /* open sysfs class device directory and print all attributes */
+ printf("looking at class device '%s':\n", class_dev->path);
+ if (print_all_attributes(class_dev->path) != 0) {
+ printf("couldn't open class device directory\n");
+ retval = -1;
+ goto exit;
+ }
+
+ /* get the device (if parent exists use it instead) */
+ 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_device = sysfs_get_classdev_device(class_dev);
+ if (sysfs_device != NULL) {
+ printf("follow class device's \"device\" link '%s':\n", class_dev->path);
+ printf(" BUS=\"%s\"\n", sysfs_device->bus);
+ printf(" ID=\"%s\"\n", sysfs_device->bus_id);
+
+ /* open sysfs device directory and print all attributes */
+ print_all_attributes(sysfs_device->path);
+ sysfs_close_device(sysfs_device);
+ }
+
+exit:
+ //sysfs_close_class_device(class_dev);
+ return retval;
+}