This file is indexed.

/usr/share/plplot5.10.0/pkgIndex.tcl is in plplot-tcl 5.10.0+dfsg2-0.1ubuntu2.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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# $Id: pkgIndex.tcl.in 12937 2014-01-13 03:22:38Z airwin $

# Load PLplot tcl extension

# Copyright (C) 2004  Alan W. Irwin
# Copyright (C) 2004  Joao Cardoso
#
# This file is part of PLplot.
#
# PLplot is free software; you can redistribute it and/or modify
# it under the terms of the GNU Library General Public License as published
# by the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# PLplot is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Library General Public License for more details.
#
# You should have received a copy of the GNU Library General Public License
# along with PLplot; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

# This proc takes care of finding & loading the proper driver.

# The original version dealt with the possibility that either or both $dir and
# $file may contain spaces, or characters like []{}, but this hasn't been
# tested for this version.

proc load_pkg_Pltcl {dir} {
    global pllibrary tcl_platform auto_path
    #puts "loading Pltcl, dir: $dir"
    set pllibrary $dir

    set thisDir [pwd]
    # Find absolute path of $dir 
    cd $dir
    set pkgIndexDir [pwd]
    cd $thisDir
    set buildDir "/build/plplot-dqpFYP/plplot-5.10.0+dfsg2/debian/build_tmp"
    set bLen [string length $buildDir]
    # If pkgIndexDir is in the build tree...
    if {$tcl_platform(platform) == "unix"} {
	if {![string compare -length $bLen $buildDir $pkgIndexDir]} then {
	    set searchdirs "."
	} else {
	    set searchdirs [list "/usr/lib/x86_64-linux-gnu"]
	}
    } else {
	if {![string compare -length $bLen $buildDir $pkgIndexDir]} then {
	    set searchdirs "../../dll"
	} else {
	    set searchdirs [list "/usr/lib/x86_64-linux-gnu../bin"]
	}
    }
    #puts $searchdirs
    # prefer double precision version
    set dlnames [list "libplplottcltkd.so" "libplplottcltk.so"]
    set file ""
    foreach reldir $searchdirs {
	foreach dlname $dlnames {
	    set driver [file join $dir $reldir $dlname]
	    #puts "looking for driver file: $driver"
	    if [file exists $driver] {
		set file $driver
		break
	    }
	}
	if { $file != "" } { break }
    }
    if { $file == "" } {
	error "load_pkg_Pltcl: could not find loadable driver"
    }

    load $file Pltcl
    # put core tcl scripts in path
    lappend auto_path $dir/tcl
    rename load_pkg_Pltcl {}
}

package ifneeded Pltcl 5.10.0 [list load_pkg_Pltcl $dir]
# $Id: pkgIndex.tcl.in 12941 2014-01-15 20:16:36Z arjenmarkus $

# Load PLplot tk extension

# Copyright (C) 2004  Alan W. Irwin
# Copyright (C) 2004  Joao Cardoso
#
# This file is part of PLplot.
#
# PLplot is free software; you can redistribute it and/or modify
# it under the terms of the GNU Library General Public License as published
# by the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# PLplot is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Library General Public License for more details.
#
# You should have received a copy of the GNU Library General Public License
# along with PLplot; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

# This proc takes care of finding & loading the proper driver.

# The original version dealt with the possibility that either or both $dir and
# $file may contain spaces, or characters like []{}, but this hasn't been
# tested for this version.

proc load_pkg_Pltk {dir} {
    global pllibrary tcl_platform auto_path
    #puts "loading Pltk, dir: $dir"
    set pllibrary $dir

    if {$tcl_platform(platform) == "unix"} {
	if {[string match "*CYGWIN*" $::tcl_platform(os)]} {
	    set stem cygplplottcltkd-11
	} else {
	    set stem tk
	}
	set thisDir [pwd]
	# Find absolute path of $dir
	cd $dir
	set pkgIndexDir [pwd]
	cd $thisDir
	set buildDir "/build/plplot-dqpFYP/plplot-5.10.0+dfsg2/debian/build_tmp"
	set bLen [string length $buildDir]
	# If pkgIndexDir is in the build tree...
	if {![string compare -length $bLen $buildDir $pkgIndexDir]} then {
		set searchdirs [list "../../drivers" "../../dll"]} else {
		set searchdirs [list "/usr/lib/x86_64-linux-gnu/plplot5.10.0/driversd"]}
	#puts $searchdirs
	set suf [info sharedlibextension]

	set file ""
	foreach reldir $searchdirs {
	    set driver [file join $dir $reldir $stem$suf]
	    #puts "looking for driver file: $driver"
	    if [file exists $driver] {
	        set file $driver
	        break
	    }
	    if { $file != "" } { break }
	}
	if { $file == "" } {
	# Dynamic driver location failed, now try static driver location.
	set searchdirs [list "/usr/lib/x86_64-linux-gnu"]
	# prefer double precision version
	set dlnames [list "libplplotd.so" "libplplot.so"]
	set file ""
	foreach reldir $searchdirs {
	    foreach dlname $dlnames {
		set driver [file join $dir $reldir $dlname]
		#puts "looking for driver file: $driver"
		if [file exists $driver] {
		    set file $driver
		    break
		}
	    }
	    if { $file != "" } { break }
	}
	}
	if { $file == "" } {
	    error "load_pkg_Pltk: could not find loadable driver"
	}

    } else {
    # This is probably broken, someone should fix it.
	if {[info exists tcl_platform(debug)]} {
	    set file [file join $dir plplot510d[info sharedlibextension]]
	} else {
	    set file [file join $dir plplot510[info sharedlibextension]]
	}
    }

    load $file Pltk
# put core tcl scripts in path
    lappend auto_path $dir/tcl
    rename load_pkg_Pltk {}
}

package ifneeded Pltk 5.10.0 [list load_pkg_Pltk $dir]
# $Id: pkgIndex.tcl.in 12709 2013-11-17 00:45:35Z airwin $

# Load PLplot tkwin extension

# Copyright (C) 2004  Alan W. Irwin
# Copyright (C) 2004  Joao Cardoso
#
# This file is part of PLplot.
#
# PLplot is free software; you can redistribute it and/or modify
# it under the terms of the GNU Library General Public License as published
# by the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# PLplot is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Library General Public License for more details.
#
# You should have received a copy of the GNU Library General Public License
# along with PLplot; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

# This proc takes care of finding & loading the proper driver.

# The original version dealt with the possibility that either or both $dir and
# $file may contain spaces, or characters like []{}, but this hasn't been
# tested for this version.

proc load_pkg_Plplotter {dir} {
    global pllibrary tcl_platform auto_path
    #puts "loading Plplotter, dir: $dir"
    set pllibrary $dir

    if {$tcl_platform(platform) == "unix"} {
	set stem tkwin
	set thisDir [pwd]
	# Find absolute path of $dir 
	cd $dir
	set pkgIndexDir [pwd]
	cd $thisDir
	set buildDir "/build/plplot-dqpFYP/plplot-5.10.0+dfsg2/debian/build_tmp"
	set bLen [string length $buildDir]
	# If pkgIndexDir is in the build tree...
	if {![string compare -length $bLen $buildDir $pkgIndexDir]} then {
		set searchdirs "../../drivers"} else {
		set searchdirs [list "/usr/lib/x86_64-linux-gnu/plplot5.10.0/driversd"]}
	#puts $searchdirs
	set suf [info sharedlibextension]

	set file ""
	foreach reldir $searchdirs {
	    set driver [file join $dir $reldir $stem$suf]
	    #puts "looking for driver file: $driver"
	    if [file exists $driver] {
	        set file $driver
	        break
	    }
	    if { $file != "" } { break }
	}
	if { $file == "" } {
	# Dynamic driver location failed, now try static driver location.
	    set searchdirs [list "/usr/lib/x86_64-linux-gnu"]
	# prefer double precision version
	    set dlnames [list "libplplotd.so libplplot.so"]
	set file ""
	foreach reldir $searchdirs {
	    foreach dlname $dlnames {
		set driver [file join $dir $reldir $dlname]
		#puts "looking for driver file: $driver"
		if [file exists $driver] {
		    set file $driver
		    break
		}
	    }
	    if { $file != "" } { break }
	}
	}
	if { $file == "" } {
	    error "load_pkg_Plplotter: could not find loadable driver"
	}

    } else {
    # This is probably broken, someone should fix it.
	if {[info exists tcl_platform(debug)]} {
	    set file [file join $dir plplot510d[info sharedlibextension]]
	} else {
	    set file [file join $dir plplot510[info sharedlibextension]]
	}
    }

    load $file Plplotter
# put core tcl scripts in path
    lappend auto_path $dir/tcl
    rename load_pkg_Plplotter {}
}

package ifneeded Plplotter 5.10.0 [list load_pkg_Plplotter $dir]