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Sys::Utmp(3pm) User Contributed Perl Documentation Sys::Utmp(3pm)NAME
Sys::Utmp - Object(ish) Interface to UTMP files.
SYNOPSIS
use Sys::Utmp;
my $utmp = Sys::Utmp->new();
while ( my $utent = $utmp->getutent() )
{
if ( $utent->user_process )
{
print $utent->ut_user,"
";
}
}
$utmp->endutent;
See also examples/pwho in the distribution directory.
DESCRIPTION
Sys::Utmp provides a vaguely object oriented interface to the Unix user accounting file ( sometimes /etc/utmp or /var/run/utmp). Whilst it
would prefer to use the getutent() function from the systems C libraries it will attempt to provide its own if they are missing.
This may not be the module that you are looking for - there is a User::Utmp which provides a different procedural interface and may well be
more complete for your purposes.
METHODS
new The constructor of the class. Arguments may be provided in Key => Value pairs : it currently takes one argument 'Filename' which will
set the file which is to be used in place of that defined in _PATH_UTMP.
getutent
Iterates of the records in the utmp file returning a Sys::Utmp::Utent object for each record in turn - the methods that are available
on these objects are descrived in the Sys::Utmp::Utent documentation. If called in a list context it will return a list containing the
elements of th Utent entry rather than an object. If the import flag ':fields' is used then constants defining the indexes into this
list will be defined, these are uppercase versions of the methods described in Sys::Utmp::Utent.
setutent
Rewinds the file pointer on the utmp filehandle so repeated searches can be done.
endutent
Closes the file handle on the utmp file.
utmpname SCALAR filename
Sets the file that will be used in place of that defined in _PATH_UTMP. It is not defined what will happen if this is done between two
calls to getutent() - it is recommended that endutent() is called first.
EXPORT
No methods or constants are exported by default.
Exportable constants
These constants are exportable under the tag ':constants':
ACCOUNTING
BOOT_TIME
DEAD_PROCESS
EMPTY
INIT_PROCESS
LOGIN_PROCESS
NEW_TIME
OLD_TIME
RUN_LVL
USER_PROCESS
These are the values that will be found in the ut_type field of the Sys::Utmp::Utent object.
These constants are exported under the tag ':fields' :
UT_USER
UT_ID
UT_LINE
UT_PID
UT_TYPE
UT_HOST
UT_TIME
These provide the indexes into the list returned when "getutent" is called in list context.
BUGS
Probably. This module has been tested on Linux, Solaris, FreeBSD ,SCO Openserver and SCO UnixWare and found to work on those platforms.
If you have difficulty building the module or it doesnt behave as expected then please contact the author including if appropriate your
/usr/include/utmp.h
AUTHOR
Jonathan Stowe, <jns@gellyfish.com>
LICENCE
This Software is Copyright Netscalibur UK 2001,
Jonathan Stowe 2001-2006
This Software is published as-is with no warranty express or implied.
This is free software and can be distributed under the same terms as Perl itself.
SEE ALSO
perl. Sys::Utmp::Utent
perl v5.14.2 2006-10-13 Sys::Utmp(3pm)
