Name:		tlpi
Version:	221220
Release:	%autorelease
Summary:	Utilities to display namespaces and control groups

License:	GPLv3+
URL:		https://man7.org/tlpi/index.html
Source:		https://man7.org/tlpi/code/download/tlpi-%version-dist.tar.gz
Patch:		Makefile.patch

BuildRequires:	gcc-go
BuildRequires:	libacl-devel
BuildRequires:	libcap-devel
BuildRequires:	libseccomp-devel

Requires:	tlpi-licenses

%global examplesdir %_pkgdocdir/examples

%description
The book The Linux Programming Interface and training courses given by
man7.org are accompanied with a set of code examples. Some of these
examples are useful in their own right. This package includes the
following utilities.
- pid_namespaces  Show the PID namespace hierarchy.
- namespace_of	  Show the namespace memberships of one or more processes
		  in the context of the user or PID namespace
		  hierarchy. See the bundled source code for further
		  documentation.
- userns_overview Display a hierarchical view of the user namespaces
		  on the system along with the member processes for
		  each namespace.
- view_v2_cgroups Display one or more subtrees in the cgroups v2
		  hierarchy. The following info is displayed for each
		  cgroup: the cgroup type, the controllers enabled in
		  the cgroup, and the process and thread members of
		  the cgroup.


%package examples
Summary:	Example code from the tlpi package
BuildArch:	noarch
Requires:	tlpi-licenses

%description examples
The book The Linux Programming Interface and training courses given by
man7.org are accompanied with a set of code examples. This package
include these examples in source code form.

The package is probably mostly useful in conjunction with the book.


%package examples-bin
Summary:	Compiled examples from the tlpi package
Recommends:	tlpi-examples = %version-%release
Requires:	tlpi-licenses

%description examples-bin
The book The Linux Programming Interface and training courses given by
man7.org are accompanied with a set of code examples. This package
include the binaries built from these sources. They are installed with
a prefix "tlpi-<dir>" where "<dir>" corresponds to the directory in
the source tree.

The package is probably mostly useful in conjunction with the book.


%package licenses
Summary:	License files from tlpi source
BuildArch:	noarch
Requires:	tlpi-licenses

%description licenses
This package contains the license files from tlpi packages.


%prep
%autosetup -p 0 -n tlpi-dist


%build
# Remember all source files for the examples, save before building
ls --format=single-column --directory [a-z]* > dirs_examples
find $(cat dirs_examples) -type f -printf '%h %f\n' > source_examples
make
gccgo -fPIE -pie -o pid_namespaces namespaces/pid_namespaces.go
gccgo -fPIE -pie -o namespaces_of namespaces/namespaces_of.go
gccgo -fPIE -pie -o userns_overview namespaces/userns_overview.go
gccgo -fPIE -pie -o view_v2_cgroups cgroups/view_v2_cgroups.go


%install
install -D --target-directory=%buildroot%_bindir \
	pid_namespaces namespaces_of userns_overview view_v2_cgroups
while read dir file
do  install -D --target-directory=%buildroot%examplesdir/$dir \
	--mode=u=rw,go=r $dir/$file
done < source_examples
install --target-directory=%buildroot%examplesdir \
    --mode=u=rw,go=r BUILDING CHANGES Makefile Makefile.inc README
find $(cat dirs_examples) -type f -executable -printf '%h %f\n'| \
while read dir file
do  install $dir/$file %buildroot%_bindir/tlpi-${dir/\//-}-$file
done


%files
%doc namespaces/namespaces_of.go
%_bindir/pid_namespaces
%_bindir/namespaces_of
%_bindir/userns_overview
%_bindir/view_v2_cgroups

%files examples
%doc %examplesdir

%files examples-bin
%_bindir/tlpi-*

%files licenses
%license COPYING.*


%changelog
* Tue Jan 24 2023 Göran Uddeborg <goeran@uddeborg.se> - 221220-1
- Updated to the most recent release.
- Make sure binaries are built position independent.
- Build subpackages from the example code in the sources not previously
  built.

* Mon Mar 28 2022 Göran Uddeborg <goeran@uddeborg.se> - 220211-1
- Updated to the most recent release.

* Tue Nov 24 2020 Göran Uddeborg <goeran@uddeborg.se> - 201025-1
- Initial RPM packaging.