autopush - Manages the system's database of automatically
pushed STREAMS modules
/usr/sbin/autopush -ffile
/usr/sbin/autopush -r -M major -m minor
/usr/sbin/autopush -g -M major -m minor
Sets up the system database that contains the lists of
modules to be automatically pushed on the streams for
STREAMS devices. The file argument specifies the system
file from which the command will copy this configuration
information. The -f option is also used to place a
device's configuration information back into the database.
Gets the configuration information in the system database
for the STREAMS major and minor device or devices specified
by the -M and -m options. Removes the configuration
information in the system's database for the STREAMS major
and minor device or devices specified by the -M and -m
options.
The autopush command manages the system's database of
information for the automatic configuration of STREAMS
devices. The autopush command's options are mutually
exclusive.
The command initializes the database with the names of the
STREAMS devices to be automatically configured and a list
of modules to use for each device (-f option). When a
device is subsequently opened, the STREAMS subsystem
pushes the modules on the stream for the device. The autopush
command also displays the current configuration
information for a device in the database (-g option),
removes the information for a device from the database (-r
option), and replaces the information that has previously
been removed (-f option). When the -f option is used to
replace information in the database, the entire contents
of the configuration file are copied. Also, the -r option
removes information only temporarily, because it acts on
the database. To permanently exclude a STREAMS device from
the database, you must remove its information from the
configuration file.
A device stream can be automatically constructed for a
STREAMS major device, a major device and any associated
minor devices, or just the minor devices, depending on the
information in the configuration file. Tru64 UNIX provides
the autopush.conf file for use as a configuration file.
You can use another file as long as the information in the
file is written in the correct format. The autopush.conf
file contains one-line entries for each of the STREAMS
devices that are to be automatically configured in the
system. A line contains at least four fields: Contains an
integer representing the STREAMS device's major device.
Contains an integer representing one or more minor devices
associated with the major device. If minor has a value of
-1, then all the minor devices of the driver specified by
major are given the same autopush configuration. Contains
an integer representing the last minor device in a range
associated with the major device. If last_minor has a
value of 0 (zero), then the major device has only a single
minor device for which the same stream must be constructed.
Contains the name of the module to be automatically
pushed onto the stream. There can be multiple module
name fields, up to a maximum of eight, separated by spaces
or commas. The autopush command pushes modules in the
order in which they are listed. This means that the first
module named is positioned just above the STREAMS device
driver.
The configuration file can also contain comment lines,
which begin with # (number sign) and end with newline.
If the major and minor arguments specified by the -M and
-m options of the -r option option designate a range of
minor devices, and minor matches the first minor device
number in the range, then the autopush command removes the
configuration information for all of the minor devices of
the major device.
If the major and minor arguments specified by the -M and
-m options of the -g option option are set for a range in
the configuration file, the autopush command returns the
configuration information for the first minor device number,
in addition to the other information.
To set up the automatic configuration information for the
STREAMS devices in the system, enter: autopush -f
/etc/autopush.conf To obtain information about the stream
for major device 28 and its minor device -2, enter: autopush
-g -M 28 -m -2
Specifies the modules to be pushed onto the streams for
STREAMS devices.
Files: streamio(7)
autopush(8)
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