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LEARN ABOUT OSF1
evm.auth
evm.auth(4) Kernel Interfaces Manual evm.auth(4)
NAME
evm.auth - EVM authorization file
SYNOPSIS
event_rights {
class event_class
post rights_list
access rights_list
}
service_rights {
service service_name
execute rights_list
}
DESCRIPTION
Authorization is control of the right to post, subscribe to, or retrieve an EVM event, or to execute services defined in the EVM daemon
configuration file.
The evm.auth file is a text file that controls event authorization. Any portion of a line from an unquoted number sign (#) to the end of
line is a comment. Blank lines are ignored. The following authorization controls are recognized: The rights specified apply to event
posting and subscription. Class of events to which these rights apply. An event_class is a string of one or more components that match
the same set of components in an Event Name. It is used to identify a family of events for purposes such as authorization. The more spe-
cific classes (those with more components) override the rights indicated by the less specific (more generic) classes. Users specified by
the rights_list are allowed or denied the right to post events of this event_class. Users specified by the rights_list are allowed or
denied the right to subscribe to or retrieve from the log, events of this event_class. A list of users or groups who have or are denied
the specified right for this event or service class. Entries are separated by commas.
A rights_list has the format:
[+|-][user | group=groupname]
In the previous rights_list, user is the login name of any user, and groupname is any group. The keyword group may be abbreviated
to grp. A leading plus character (+) signifies that event or service rights are granted. A leading minus character (-) signifies
that rights are explicitly denied. User root has implicit posting and access rights to all events, and execute rights to all ser-
vices, unless they are explicitly denied.
The first explicit entry for a user in a rights list takes precedence over any other explicit or group entries for that user. If
the user is not explicitly listed, but is a member of a group which denies access, access is denied even if the user is also a mem-
ber of a group for which access is granted.
A plus or minus sign with no associated name grants or denies rights to all users.
The rights_list must be enclosed in double quotes if it contains spaces. The rights specified apply to services performed by the
daemon for a requesting client. The service to which these rights apply. The service_name is the name of a service defined in the
evmdaemon.conf file. User-defined services are not currently supported. Users specified by the rights_list are allowed or denied
the right to request operation of this service.
The keywords described may be entered in a case-insensitive manner. The allowable strings and the minimum number of characters is shown in
the following table. A minimum of zero (0) indicates that all characters are required.
-------------------------
Keyword Minimum
-------------------------
access 0
class 0
event_rights 7
execute 4
post 0
service 4
service_rights 9
-------------------------
NOTES
If you add an event_rights entry to the authorization file, you must make sure there is a corresponding base event template in the template
file library. The base template must have a name whose components exactly match the corresponding components in the authorization file's
class value. The template name can have fewer components than are present in the class, but it cannot have more. For example, if an
event_rights group has a class value of myco.myprod.payroll, and an event template with the name myco.myprod has been registered in an EVM
template file, the template will be regarded as the base template for the class.
Each time the daemon loads or reloads its configuration, it writes a warning message in its error file if no base template is registered
for a particular event_rights entry.
Refer to the evmtemplate(4) reference page for information about registering event templates. If you are concerned with allowing your file
to be used on other systems that support EVM in the future, you should use the built-in macro @SYS_VP@ in place of the first two components
(sys.unix) of the name of any system event. This will make it unnecessary to change the file if the other system uses a different event
name prefix.
EXAMPLES
This example illustrates an entry in the authorization file with the following privileges: Only root may post events that have myco.myapp
as the first two components of the event name. Events in this class may be accessed by root or by any user who is a member of the tech
group. event_rights {
class myco.myapp
post +root
access "+root, +group=tech" }
FILES
Location of the EVM authorization file.
SEE ALSO
Commands: evmd(8)
Files: evmdaemon.conf(4), evmtemplate(4)
Event Management: EVM(5)
delim off
evm.auth(4)