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diff --git a/man/udev.xml b/man/udev.xml
index ca8444c12..38acdf744 100644
--- a/man/udev.xml
+++ b/man/udev.xml
@@ -30,7 +30,7 @@
udev
- Linux dynamic device management
+ Dynamic device managementDescription
@@ -54,7 +54,7 @@
sources is provided by the library libudev.
- Rules files
+ Rules FilesThe udev rules are read from the files located in the
system rules directory /usr/lib/udev/rules.d,
the volatile runtime directory /run/udev/rules.d
@@ -67,10 +67,8 @@
used to override a system-supplied rules file with a local file if needed;
a symlink in /etc with the same name as a rules file in
/lib, pointing to /dev/null,
- disables the rules file entirely.
-
- Rule files must have the extension .rules; other
- extensions are ignored.
+ disables the rules file entirely. Rule files must have the extension
+ .rules; other extensions are ignored.
Every line in the rules file contains at least one key-value pair.
Except for empty lines or lines beginning with #, which are ignored.
@@ -273,7 +271,7 @@
- Most of the fields support shell-style pattern matching. The following
+ Most of the fields support shell glob pattern matching. The following
pattern characters are supported:
@@ -342,6 +340,13 @@
+
+ SECLABEL{module}
+
+ Applies the specified Linux Security Module label to the device node.
+
+
+
ATTR{key}
@@ -471,7 +476,7 @@
Import the stored keys from the parent device by reading
the database entry of the parent device. The value assigned to
is used as a filter of key names
- to import (with the same shell-style pattern matching used for
+ to import (with the same shell glob pattern matching used for
comparisons).
@@ -701,6 +706,41 @@
+ Hardware Database Files
+ The hwdb files are read from the files located in the
+ system hwdb directory /usr/lib/udev/hwdb.d,
+ the volatile runtime directory /run/udev/hwdb.d
+ and the local administration directory /etc/udev/hwdb.d.
+ All hwdb files are collectively sorted and processed in lexical order,
+ regardless of the directories in which they live. However, files with
+ identical filenames replace each other. Files in /etc
+ have the highest priority, files in /run take precedence
+ over files with the same name in /lib. This can be
+ used to override a system-supplied hwdb file with a local file if needed;
+ a symlink in /etc with the same name as a hwdb file in
+ /lib, pointing to /dev/null,
+ disables the hwdb file entirely. hwdb files must have the extension
+ .hwdb; other extensions are ignored.
+
+ The hwdb file contains data records consisting of matches and
+ associated key-value pairs. Every record in the hwdb starts with one or
+ more match string, specifying a shell glob to compare the database
+ lookup string against. Multiple match lines are specified in additional
+ consecutive lines. Every match line is compared indivdually, they are
+ combined by OR. Every match line must start at the first character of
+ the line.
+
+ The match lines are followed by one or more key-value pair lines, which
+ are recognized by a leading space character. The key name and value are separated
+ by =. An empty line signifies the end
+ of a record. Lines beginning with # are ignored.
+
+ The content of all hwdb files is read by
+ udevadm8
+ and compiled to a binary database located at /etc/udev/hwdb.bin.
+ During runtime only the binary database is used.
+
+
See Also