This file is indexed.

/usr/lib/grass64/include/grass/keyframe.h is in grass-dev 6.4.3-3.

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

The actual contents of the file can be viewed below.

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#ifndef _KEYFRAME_H
#define _KEYFRAME_H

/* these have to be 1 << KF_id_index */

#define KF_FROMX_MASK	0x00000001
#define KF_FROMY_MASK	0x00000002
#define KF_FROMZ_MASK	0x00000004
#define KF_FROM_MASK	0x00000007

#define KF_DIRX_MASK	0x00000008
#define KF_DIRY_MASK	0x00000010
#define KF_DIRZ_MASK	0x00000020
#define KF_DIR_MASK	0x00000038

#define KF_FOV_MASK	0x00000040
#define KF_TWIST_MASK	0x00000080

#define KF_ALL_MASK	0x000000FF

#define KF_NUMFIELDS 8

#define KF_LINEAR 111
#define KF_SPLINE 222
#define KF_LEGAL_MODE(m) (m == KF_LINEAR || m == KF_SPLINE)

#endif /* _KEYFRAME_H */