X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=udev.8.in;h=9c22f8aa633a9e78fb78717a031bfa230427d130;hp=6d1dfd9d189f2220423f0394b9bda32e36b45c05;hb=d30ef6b192a39cf69f9e6037a4c984ccf533f721;hpb=aef6bb132ef2f5b4c446e42f6050033d4f5c177b

diff --git a/udev.8.in b/udev.8.in
index 6d1dfd9d1..9c22f8aa6 100644
--- a/udev.8.in
+++ b/udev.8.in
@@ -272,6 +272,13 @@ all remaining parts of the result string are substituted:
 .BI %s{ filename }
 The content of a sysfs attribute.
 .TP
+.B %e
+If a device node already exists with the name, the smallest positive
+decimal integer N is substituted such that the resulting name doesn't
+match an existing device node. Otherwise nothing is substituted. This
+can be used to create compatibility symlinks and enumerate devices of
+the same type originating from different kernel subsystems.
+.TP
 .B %%
 The '%' character itself.
 .P
@@ -302,6 +309,14 @@ KERNEL="ttyUSB1", NAME="pda", SYMLINK="palmtop handheld"
 
 # multiple USB webcams with symlinks to be called webcam0, webcam1, ...
 BUS="usb", SYSFS{model}="XV3", NAME="video%n", SYMLINK="webcam%n"
+
+# grouping of optical drives from multiple kernel subsystems
+KERNEL="sr*", NAME="%k", SYMLINK="cdrom%e"
+KERNEL="scd*", NAME="%k", SYMLINK="cdrom%e"
+KERNEL="pcd*", NAME="%k", SYMLINK="cdrom%e"
+KERNEL="hd[a-z]", PROGRAM="/bin/cat /proc/ide/%k/media", RESULT="cdrom",
+  NAME="%k", SYMLINK="cdrom%e"
+
 .fi
 .P
 The permissions and ownership of the created device file is read from