This file is indexed.

/usr/src/blcr-0.8.2/contrib/blcr.magic is in blcr-dkms 0.8.2-15ubuntu2.

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The actual contents of the file can be viewed below.

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#  This is file type detection data for the file(1), as described in the
#  magic(5) manpage.  In most cases adding this to /etc/magic will allow
#  the file(1) utility to identify BLCR's context files.  However, you
#  should consult your file(1) and magic(5) manpages to determine the
#  proper location for your own installation.
#
# Berkeley Lab Checkpoint Restart (BLCR) checkpoint context files
# http://ftg.lbl.gov/checkpoint
0	string	C\0\0\0R\0\0\0	BLCR
>16	lelong	1	x86
>16	lelong	3	alpha
>16	lelong	5	x86-64
>16	lelong	7	ARM
>8	lelong	x	context data (little endian, version %d)
# Uncomment the following only of your "file" program supports "search"
#>0	search/1024	VMA\06	for kernel 
#>>&1	byte	x	%d.
#>>&2	byte	x	%d.
#>>&3	byte	x	%d
0	string	\0\0\0C\0\0\0R	BLCR
>16	belong	2	SPARC
>16	belong	4	ppc
>16	belong	6	ppc64
>16	belong	7	ARMEB
>16	belong	8	SPARC64
>8	belong	x	context data (big endian, version %d)
# Uncomment the following only of your "file" program supports "search"
#>0	search/1024	VMA\06	for kernel 
#>>&1	byte	x	%d.
#>>&2	byte	x	%d.
#>>&3	byte	x	%d