autopush(8)autopush(8)NAMEautopush - Manages the system's database of automatically pushed
STREAMS modules
SYNOPSIS
/usr/sbin/autopush -ffile
/usr/sbin/autopush -r-M major -m minor
/usr/sbin/autopush -g-M major -m minor
OPTIONS
Sets up the system database that contains the lists of modules to be
automatically pushed on the streams for STREAMS devices. The file argu‐
ment 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.
DESCRIPTION
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 config‐
uration 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 automati‐
cally 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 multi‐
ple 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.
EXAMPLES
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
FILES
Specifies the modules to be pushed onto the streams for STREAMS
devices.
SEE ALSO
Files: streamio(7)autopush(8)
