/usr/include/freebsd/grp.h is in freebsd-glue 0.2.20.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 | #include_next <grp.h>
#ifndef _GRP_H_
#define _GRP_H_
#include <sys/cdefs.h>
#include <sys/_types.h>
#define _PATH_GROUP "/etc/group"
#endif
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