This file is indexed.

/usr/lib/tcltk/signal/pkgIndex.tcl is in tcl-signal 1.4-2.

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

The actual contents of the file can be viewed below.

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# Tcl package index file, version 1.0
# This file is generated by the "pkg_mkIndex" command
# and sourced either when an application starts up or
# by a "package unknown" script.  It invokes the
# "package ifneeded" command to set up package-related
# information so that packages will be loaded automatically
# in response to "package require" commands.  When this
# script is sourced, the variable $dir must contain the
# full path name of this file's directory.

package ifneeded Signal 1.4.0.1 [list tclPkgSetup $dir Signal 1.4.0.1 {{signal.so load signal}}]