ProcessTable(3pm)
NAME
Proc::ProcessTable - Perl extension to access the unix process table
SYNOPSIS
use Proc::ProcessTable; $p = new Proc::ProcessTable( 'cache_ttys' => 1 ); @fields = $p->fields; $ref = $p->table;
DESCRIPTION
Perl interface to the unix process table.
METHODS
- 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 diables
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 overriden 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 file is /tmp/TTYDEVS by
default). This feature requires the Storable module. - 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.
EXAMPLES
# A cheap and sleazy version of ps
use Proc::ProcessTable;
- $FORMAT = "%-6s %-10s %-8s %-24s %s\n";
$t = new Proc::ProcessTable;
printf($FORMAT, "PID", "TTY", "STAT", "START", "COMMAND");
foreach $p ( @{$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; - $t = new Proc::ProcessTable;
- foreach $p (@{$t->table}) {
print "--------------------------------\n";
foreach $f ($t->fields){print $f, ": ", $p->{$f}, "\n";} - }
CAVEATS
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.
AUTHOR
D. Urist, durist@frii.com
SEE ALSO
- Proc::ProcessTable::Process.pm, perl(1).