diff options
Diffstat (limited to 'udev.8')
| -rw-r--r-- | udev.8 | 33 |
1 files changed, 31 insertions, 2 deletions
@@ -3,11 +3,34 @@ udev \- Linux configurable dynamic device naming support .SH SYNOPSIS .BI udev " hotplug-subsystem" +.P +The environment must provide the following variables: +.TP +.B ACTION +.IR add " or " remove +signifies the connection or disconnection of a device. +.TP +.B DEVPATH +The sysfs devpath of the device without the mountpoint but a leading slash. +.P +Additional optional environment variables are: +.TP +.B UDEV_CONFIG_FILE +Overrides the default location of the +.B udev +config file. +.TP +.B UDEV_NO_SLEEP +The default behavior of +.B udev +is to wait until all the sysfs files of the device chain are populated. If set +.B udev +will will continue, regardless of the state of the device representation. .SH "DESCRIPTION" .B udev creates or removes device node files usually located in the /dev directory. -Its goal is to provide a dynamic device directory that contains only the files -for devices that are actually present. +It provides a dynamic device directory that contains only the files for +devices that are actually present. .P As part of the .B hotplug @@ -159,6 +182,11 @@ all of the values being required in order to match the rule. .TP .B PROGRAM Call external program. This key is valid if the program returns successful. +A few command line options may specified, but shell characters like pipe, +diversion or similiar options are not available. The environment variables of +.B udev +are also available for the program. +.br The string returned by the program may additionally matched with the .B RESULT key. @@ -285,6 +313,7 @@ following the '[' is a '!' then any character not enclosed is matched. .LP .SH "SEE ALSO" .BR udevinfo (8), +.BR udevd (8), .BR hotplug (8) .PP The |