class method
File.setgid?
(::string | ::_ToPath | ::IO file_name) -> bool
File.setgid?(file_name) → true or false
file.c
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static VALUE
rb_file_sgid_p(VALUE obj, VALUE fname)
{
#ifdef S_ISGID
return check3rdbyte(fname, S_ISGID);
#else
return Qfalse;
#endif
}
Returns true if the named file has the setgid bit set.
file_name can be an IO object.