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class method
File.setuid?
(::path | ::IO file_name) -> bool
File.setuid?(object) → true or false
file.c
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static VALUE
rb_file_suid_p(VALUE obj, VALUE fname)
{
#ifdef S_ISUID
return check3rdbyte(fname, S_ISUID);
#else
return Qfalse;
#endif
}
Returns whether the setuid bit is set in the special bits for the given object, which may be a path or an IO object:
Example
path = '/tmp/t.tmp' File.write(path, 'foo') mode = File.stat(path).mode.to_s(8) # => "100664" File.setuid?(path) # => false File.chmod(0o4644, path) # Set the bit. mode = File.stat(path).mode.to_s(8) # => "104644" File.setuid?(path) # => true File.delete(path) # Clean up. File.setuid?($stdin) # => false
On Windows, the bit is never set; the method always returns false.