[PATCH] add documentation about the BUS key being optional for the CALLOUT rule.

[elogind.git] / udev.8

diff --git a/udev.8 b/udev.8
index c4ee23dcc78f8cc2cf6bba275f022c86207434a3..0a0640ad8c95d633e76cd2704f95d86077bc63ed 100644 (file)
--- a/udev.8
+++ b/udev.8
@@ -106,13 +106,17 @@ The line format is:
 where valid methods with corresponding keys are:
 .TP
 .B CALLOUT
-calling external program, that returns a string to match
+calling external program, that returns a string to match.  The 
+.BR BUS 
+key is optional, but if specified, the sysfs device bus must be able to be
+detemined by a "device" symlink.
 .br
 .RB "keys: " BUS ", " PROGRAM ", " ID
 .TP
 .B LABEL
 device label or serial number, like USB serial number, SCSI UUID or
-file system label
+file system label.  Up to 5 different sysfs files can be checked, with
+all of the values being required in order to match the rule.
 .br
 .RB "keys: " BUS ", " SYSFS_
 .TP
@@ -141,6 +145,9 @@ fields support simple printf-like string substitution:
 The "kernel number" of the device.
 for example, 'sda3' has a "kernel number" of '3'
 .TP
+.B %k
+The "kernel name" for the device.
+.TP
 .B %M
 The kernel major number for the device.
 .TP
@@ -168,6 +175,9 @@ CALLOUT, BUS="scsi", PROGRAM="/sbin/scsi_id", ID="OEM 0815", NAME="disk1"
 # USB printer to be called lp_color
 LABEL, BUS="usb", SYSFS_serial="W09090207101241330", NAME="lp_color"
 
+# SCSI disk with a specific vendor and model number is to be called boot
+LABEL, BUS="scsi", SYSFS_vendor="IBM", SYSFS_model="ST336", NAME="boot%n"
+
 # sound card with PCI bus id 00:0b.0 to be called dsp
 NUMBER, BUS="pci", ID="00:0b.0", NAME="dsp"