/usr/include/liggghts/fix_relax_contacts.h is in libliggghts-dev 3.7.0+repack1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 | #include "fix.h"
namespace LAMMPS_NS {class FixRelaxContacts : public Fix { public: inline double factor_relax(int){ return 1.;} };}
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