Proc::ProcessTable(3pm)

1Proc::ProcessTable(3) User Contributed Perl DocumentationProc::ProcessTable(3)
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NAME

6       Proc::ProcessTable - Perl extension to access the unix process table
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SYNOPSIS

9         use Proc::ProcessTable;
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11         my $p = Proc::ProcessTable->new( 'cache_ttys' => 1 );
12         my @fields = $p->fields;
13         my $ref = $p->table;
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DESCRIPTION

16       Perl interface to the unix process table.
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METHODS

19       new Creates a new ProcessTable object. The constructor can take the
20           following flags:
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22           enable_ttys -- causes the constructor to use the tty determination
23           code, which is the default behavior.  Setting this to 0 disables
24           this code, thus preventing the module from traversing the device
25           tree, which on some systems, can be quite large and/or contain
26           invalid device paths (for example, Solaris does not clean up
27           invalid device entries when disks are swapped).  If this is
28           specified with cache_ttys, a warning is generated and the
29           cache_ttys is overridden to be false.
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31           cache_ttys -- causes the constructor to look for and use a file
32           that caches a mapping of tty names to device numbers, and to create
33           the file if it doesn't exist. This feature requires the Storable
34           module.  By default, the cache file name consists of a prefix
35           /tmp/TTYDEVS_ and a byte order tag. The file name can be accessed
36           (and changed) via $Proc::ProcessTable::TTYDEVSFILE.
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38       fields
39           Returns a list of the field names supported by the module on the
40           current architecture.
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42       table
43           Reads the process table and returns a reference to an array of
44           Proc::ProcessTable::Process objects. Attributes of a process object
45           are returned by accessors named for the attribute; for example, to
46           get the uid of a process just do:
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48           $process->uid
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50           The priority and pgrp methods also allow values to be set, since
51           these are supported directly by internal perl functions.
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EXAMPLES

54        # A cheap and sleazy version of ps
55        use Proc::ProcessTable;
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57        my $FORMAT = "%-6s %-10s %-8s %-24s %s\n";
58        my $t = Proc::ProcessTable->new;
59        printf($FORMAT, "PID", "TTY", "STAT", "START", "COMMAND");
60        foreach my $p ( @{$t->table} ){
61          printf($FORMAT,
62                 $p->pid,
63                 $p->ttydev,
64                 $p->state,
65                 scalar(localtime($p->start)),
66                 $p->cmndline);
67        }
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69
70        # Dump all the information in the current process table
71        use Proc::ProcessTable;
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73        my $t = Proc::ProcessTable->new;
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75        foreach my $p (@{$t->table}) {
76         print "--------------------------------\n";
77         foreach my $f ($t->fields){
78           print $f, ":  ", $p->{$f}, "\n";
79         }
80        }
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CAVEATS

83       Please see the file README in the distribution for a list of supported
84       operating systems. Please see the file PORTING for information on how
85       to help make this work on your OS.
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AUTHOR

88       D. Urist, durist@frii.com
89