/usr/bin/dh_installinfo is in debhelper 9.20120115ubuntu3.
This file is owned by root:root, with mode 0o755.
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  | #!/usr/bin/perl -w
=head1 NAME
dh_installinfo - install info files
=cut
use strict;
use Debian::Debhelper::Dh_Lib;
=head1 SYNOPSIS
B<dh_installinfo> [S<I<debhelper options>>] [B<-A>] [S<I<file> ...>]
=head1 DESCRIPTION
B<dh_installinfo> is a debhelper program that is responsible for installing
info files into F<usr/share/info> in the package build directory.
=head1 FILES
=over 4
=item debian/I<package>.info
List info files to be installed.
=back
=head1 OPTIONS
=over 4
=item B<-A>, B<--all>
Install all files specified by command line parameters in ALL packages
acted on.
=item I<file> ...
Install these info files into the first package acted on. (Or in
all packages if B<-A> is specified).
=back
=cut
init();
foreach my $package (@{$dh{DOPACKAGES}}) {
	my $tmp=tmpdir($package);
	my $file=pkgfile($package,"info");
	my @info;
	
	if ($file) {
		@info=filearray($file, ".");
	}
	if (($package eq $dh{FIRSTPACKAGE} || $dh{PARAMS_ALL}) && @ARGV) {
		push @info, @ARGV;
	}
	if (@info) {
		if ( ! -d "$tmp/usr/share/info") {
			doit("install","-d","$tmp/usr/share/info");
		}
		doit("cp",@info,"$tmp/usr/share/info");
		doit("chmod","-R", "go=rX","$tmp/usr/share/info/");
		doit("chmod","-R", "u+rw","$tmp/usr/share/info/");
		# For transition, could be removed later.
		addsubstvar($package, "misc:Depends", "dpkg (>= 1.15.4) | install-info");
	}
}
=head1 SEE ALSO
L<debhelper(7)>
This program is a part of debhelper.
=head1 AUTHOR
Joey Hess <joeyh@debian.org>
=cut
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