/usr/share/perl5/SHARYANTO/Proc/Util.pm is in libsharyanto-utils-perl 0.53-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 | package SHARYANTO::Proc::Util;
use 5.010;
use strict;
use warnings;
require Exporter;
our @ISA = qw(Exporter);
our @EXPORT_OK = qw(get_parent_processes);
our $VERSION = '0.53'; # VERSION
sub get_parent_processes {
my ($pid) = @_;
$pid //= $$;
# things will be simpler if we use the -s option, however not all versions
# of pstree supports it.
my @lines = `pstree -pA`;
return undef unless @lines;
my @p;
my %proc;
for (@lines) {
my $i = 0;
while (/(?: (\s*(?:\|-?|`-)) | (.+?)\((\d+)\) )
(?: -[+-]- )?/gx) {
unless ($1) {
my $p = {name=>$2, pid=>$3};
$p[$i] = $p;
$p->{ppid} = $p[$i-1]{pid} if $i > 0;
$proc{$3} = $p;
}
$i++;
}
}
#use Data::Dump; dd \%proc;
@p = ();
my $cur_pid = $pid;
while (1) {
return if !$proc{$cur_pid};
$proc{$cur_pid}{name} = $1 if $proc{$cur_pid}{name} =~ /\A\{(.+)\}\z/;
push @p, $proc{$cur_pid};
$cur_pid = $proc{$cur_pid}{ppid};
last unless $cur_pid;
}
shift @p; # delete cur process
\@p;
}
# ABSTRACT: OS-process-related routines
__END__
=pod
=encoding utf-8
=head1 NAME
SHARYANTO::Proc::Util - OS-process-related routines
=head1 VERSION
version 0.53
=head1 SYNOPSIS
=head1 FUNCTIONS
None are exported by default, but they are exportable.
=head2 get_parent_processes($pid) => ARRAY
Return an array containing information about parent processes of C<$pid> up to
the parent of all processes (usually C<init>). If C<$pid> is not mentioned, it
defaults to C<$$>. The immediate parent is in the first element of array,
followed by its parent, and so on. For example:
[{name=>"perl",pid=>13134}, {name=>"konsole",pid=>2232}, {name=>"init",pid=>1}]
Currently retrieves information by calling B<pstree> program. Return undef on
failure.
None are exported by default, but they are exportable.
=head1 SEE ALSO
L<Proc::ProcessTable>. Pros: does not depend on pstree command, process names
not truncated by pstree. Cons: a little bit more heavyweight (uses File::Spec,
Cwd, File::Find).
=head1 AUTHOR
Steven Haryanto <stevenharyanto@gmail.com>
=head1 COPYRIGHT AND LICENSE
This software is copyright (c) 2013 by Steven Haryanto.
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.
=head1 DESCRIPTION
=cut
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