X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=udev.config;h=7e67d3a3b47ba3fd178af5c6ffc81ac33c50f6fa;hb=772558f4e9e981ca8f68026457589784028c730b;hp=8d77099ca827314d129423c21abc0be468e397d4;hpb=c34c7c5018a4023d39f6ea4c778218e0d3e0f035;p=elogind.git

diff --git a/udev.config b/udev.config
index 8d77099ca..7e67d3a3b 100644
--- a/udev.config
+++ b/udev.config
@@ -1,13 +1,21 @@
-# There are a number of modifiers that are allowed to be used in the NAME field.
+# There are a number of modifiers that are allowed to be used in the NAME or PROGRAM fields.
 # They provide the following subsitutions:
 # %n - the "kernel number" of the device.
 #      for example, 'sda3' has a "kernel number" of '3'
 # %M - the kernel major number for the device
 # %m - the kernel minor number for the device
 # %b - the bus id for the device
+# %c - the return value for the CALLOUT program (note, this doesn't work within
+#      the PROGRAM field for the obvious reason.)
+# %D - use the devfs style disk name for this device.
+#      For partitions, this will result in 'part%n'
+#      If this is not a partition, it will result in 'disk'
 #
 
-# My usb camera...
+# Looking for scsi bus id 42:0:0:1
+CALLOUT, BUS="scsi", PROGRAM="/bin/echo -n test-%b", ID="test-42:0:0:1", NAME="%c"
+
+# A usb camera.
 LABEL, BUS="usb", vendor="FUJIFILM", NAME="camera%n"
 
 # USB Epson printer to be called lp_epson