Proc::ProcessTable - Perl extension to access the unix process table
use Proc::ProcessTable;
my $p = Proc::ProcessTable->new( 'cache_ttys' => 1 );
my @fields = $p->fields;
my $ref = $p->table;
Perl interface to the unix process table.
- new
-
Creates a new ProcessTable object. The constructor can take the following
flags:
enable_ttys -- causes the constructor to use the tty determination code,
which is the default behavior. Setting this to 0 disables this code,
thus preventing the module from traversing the device tree, which on some
systems, can be quite large and/or contain invalid device paths (for example,
Solaris does not clean up invalid device entries when disks are swapped). If
this is specified with cache_ttys, a warning is generated and the cache_ttys
is overridden to be false.
cache_ttys -- causes the constructor to look for and use a file that
caches a mapping of tty names to device numbers, and to create the
file if it doesn't exist. This feature requires the Storable module.
By default, the cache file name consists of a prefix /tmp/TTYDEVS_ and a
byte order tag. The file name can be accessed (and changed) via
$Proc::ProcessTable::TTYDEVSFILE.
- fields
-
Returns a list of the field names supported by the module on the
current architecture.
- table
-
Reads the process table and returns a reference to an array of
Proc::ProcessTable::Process objects. Attributes of a process object
are returned by accessors named for the attribute; for example, to get
the uid of a process just do:
$process->uid
The priority and pgrp methods also allow values to be set, since these
are supported directly by internal perl functions.
# A cheap and sleazy version of ps
use Proc::ProcessTable;
my $FORMAT = "%-6s %-10s %-8s %-24s %s\n";
my $t = Proc::ProcessTable->new;
printf($FORMAT, "PID", "TTY", "STAT", "START", "COMMAND");
foreach my $p ( @{$t->table} ){
printf($FORMAT,
$p->pid,
$p->ttydev,
$p->state,
scalar(localtime($p->start)),
$p->cmndline);
}
# Dump all the information in the current process table
use Proc::ProcessTable;
my $t = Proc::ProcessTable->new;
foreach my $p (@{$t->table}) {
print "--------------------------------\n";
foreach my $f ($t->fields){
print $f, ": ", $p->{$f}, "\n";
}
}
Please see the file README in the distribution for a list of supported
operating systems. Please see the file PORTING for information on how
to help make this work on your OS.
J. Bargsten, D. Urist
the Proc::ProcessTable::Process manpage, perl(1).
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