How to find where is header file

Peter Skvarka <[email protected]> Tue, 28 Jan 2025 18:35:20 +0100
Newsgroups gmane.os.netbsd.devel.toolchain
Message-ID <[email protected]>
Hello,
I have two questions:
1. Like I found, command: "pkgin pkg-content <package_name>" displays 
it's content. What is the most easy way how to find which package 
contains some header file ?
2. Which package contains headers file libutil.h ?