Exacct::File

- exacct file manipulation

Synopsis

use Sun::Solaris::Exacct::File qw(:ALL);
my $ea_file = Sun::Solaris::Exacct::File->new($myfile, &O_RDONLY);
my $ea_obj = $ea_file->get();

Description

This module provides access to the libexacct(3LIB) functions that manipulate accounting files. The interface is object-oriented and allows the creation and reading of libexacct files. The C library calls wrapped by this module are ea_open(3EXACCT), ea_close(3EXACCT), ea_next_object(3EXACCT), ea_previous_object(3EXACCT), ea_write_object(3EXACCT), ea_get_object(3EXACCT), ea_get_creator(3EXACCT), and ea_get_hostname(3EXACCT). The file read and write methods all operate on Sun::Solaris::Exacct::Object objects and perform all the necessary memory management, packing, unpacking, and structure conversions that are required.

Constants

EO_HEAD, EO_TAIL, EO_NO_VALID_HDR, EO_POSN_MSK, and EO_VALIDATE_MSK. Other constants needed by the new() method below are in the standard Perl Fcntl module.

Functions

None.

Class methods

new($name, $oflags, creator => $creator,

This method opens a libexacct file as specified by the mandatory parameters $name and $oflags, and returns a Sun::Solaris::Exacct::File object, or undef if an error occurs. The parameters $creator, $aflags, and $mode are optional and are passed as (name => value) pairs. The only valid values for $oflags are the combinations of O_RDONLY, O_WRONLY, O_RDWR, and O_CREAT described below.

The $creator parameter is a string describing the creator of the file. If it is required (for instance, when writing to a file) but absent, it is set to the string representation of the caller's UID. The $aflags parameter describes the required positioning in the file for O_RDONLY access: either EO_HEAD or EO_TAIL are allowed. If absent, EO_HEAD is assumed. The $mode parameter is the file creation mode and is ignored unless O_CREAT is specified in $oflags. If $mode is unspecified, the file creation mode is set to 0666 (octal). If an error occurs, it can be retrieved with the Sun::Solaris::Exacct::ea_error() function. See Exacct(3PERL).

$oflags $aflags Action O_RDONLY Absent or EO_HEAD Open for reading at the start of the file. O_RDONLY EO_TAIL Open for reading at the end of the file. O_WRONLY Ignored File must exist, open for writing at the end of the file. O_WRONLY | O_CREAT Ignored Create file if it does not exist, otherwise truncate and open for writing. O_RDWR Ignored File must exist, open for reading/writing, positioned at the end of the file. O_RDWR | O_CREAT Ignored Create file if it does not exist, otherwise truncate and open for reading/writing.

Object methods

There is no explicit close() method for a Sun::Solaris::Exacct::File. The file is closed when the file handle object is undefined or reassigned.

creator()

This method returns a string containing the creator of the file or undef if the file does not contain the information.

hostname()

This method returns a string containing the hostname on which the file was created, or undef if the file does not contain the information.

next()

This method reads the header information of the next record in the file. In a scalar context the value of the type field is returned as a dual-typed scalar that will be one of EO_ITEM, EO_GROUP, or EO_NONE. In a list context it returns a two-element list containing the values of the type and catalog fields. The type element is a dual-typed scalar. The catalog element is blessed into the Sun::Solaris::Exacct::Catalog class. If an error occurs, undef or (undef, undef) is returned depending upon context. The status can be accessed with the Sun::Solaris::Exacct::ea_error() function.See Exacct(3PERL).

previous()

This method reads the header information of the previous record in the file. In a scalar context it returns the type field. In a list context it returns the two-element list containing the values of the type and catalog fields, in the same manner as the next() method. Error are also returned in the same manner as the next() method.

get()

This method reads in the libexacct record at the current position in the file and returns a Sun::Solaris::Exacct::Object containing the unpacked data from the file. This object can then be further manipulated using its methods. In case of error undef is returned and the error status is made available with the Sun::Solaris::Exacct::ea_error() function. After this operation, the position in the file is set to the start of the next record in the file.

write(@ea_obj)

This method converts the passed list of Sun::Solaris::Exacct::Objects into libexacct file format and appends them to the libexacct file, which must be open for writing. This method returns true if successful and false otherwise. On failure the error can be examined with the Sun::Solaris::Exacct::ea_error() function.

Exports

By default nothing is exported from this module. The following tags can be used to selectively import constants defined in this module:

:CONSTANTS

EO_HEAD, EO_TAIL, EO_NO_VALID_HDR, EO_POSN_MSK, and EO_VALIDATE_MSK

:ALL

:CONSTANTS, Fcntl(:DEFAULT).

Attributes

See attributes(5) for descriptions of the following attributes:

See Also

ea_close(3EXACCT), ea_get_creator(3EXACCT), ea_get_hostname(3EXACCT), ea_get_object(3EXACCT), ea_next_object(3EXACCT), ea_open(3EXACCT), ea_previous_object(3EXACCT), ea_write_object(3EXACCT), Exacct(3PERL), Exacct::Catalog(3PERL), Exacct::Object(3PERL), Exacct::Object::Group(3PERL), Exacct::Object::Item(3PERL), libexacct(3LIB), attributes(5)