build: switch to meson

.github/workflows/build.yaml

@@ -24,5 +24,6 @@ jobs:
           command -v apk && apk add --no-cache linux-headers scdoc
           command -v apt && apt-get update && apt-get install -y scdoc
           command -v dnf && dnf install -y glibc-static scdoc
-          CPPFLAGS='-Wconversion -pedantic-errors' make
+          CPPFLAGS='-Wconversion -pedantic-errors' meson build
+          ninja -C build
 

config.h.in

@@ -0,0 +1,14 @@
+/* Copyright © 2020 Arista Networks, Inc. All rights reserved.
+ *
+ * Use of this source code is governed by the MIT license that can be found
+ * in the LICENSE file.
+ */
+
+#ifndef CONFIG_H_
+# define CONFIG_H_
+
+# define PACKAGE "@package@"
+# define BINDIR "@bindir@"
+# define LIBEXECDIR "@libexecdir@"
+
+#endif /* !CONFIG_H_ */

generate.sh

@@ -0,0 +1,10 @@
+#!/bin/sh
+
+(echo "/* Copyright © 2020 Arista Networks, Inc. All rights reserved."; \
+ echo " *"; \
+ echo " * Use of this source code is governed by the MIT license that can be found" ;\
+ echo " * in the LICENSE file."; \
+ echo " */"; \
+ echo ""; \
+ echo "/* This file is generated from usage.txt. Do not edit. */"; \
+ xxd -i usage.txt) > usage.c

main.c

@@ -20,6 +20,8 @@
 
 #include <asm/resource.h>
 
+#include "config.h"
+
 #include "bst_limits.h"
 #include "capable.h"
 #include "enter.h"

meson.build

@@ -0,0 +1,101 @@
+project('bst', 'c',
+		meson_version   : '>= 0.51.0',
+		license         : 'MIT',
+		version         : '0.0.1',
+		default_options : ['c_std=c11', 'warning_level=3'])
+
+prefix     = get_option('prefix')
+bindir     = join_paths(prefix, get_option('bindir'))
+libexecdir = join_paths(prefix, get_option('libexecdir'))
+
+cc = meson.get_compiler('c')
+
+add_project_arguments(
+	cc.get_supported_arguments([
+		'-Wno-unused-parameter',
+		'-Wno-unused-value',
+		'-fno-strict-aliasing',
+	]),
+	'-D_GNU_SOURCE',
+	language: ['c'])
+
+config = configuration_data()
+config.set('package', meson.project_name())
+config.set('bindir', bindir)
+config.set('libexecdir', libexecdir)
+
+configure_file(input: 'config.h.in', output: 'config.h', configuration: config)
+
+bst_init_sources = [
+	'init.c',
+	'sig.c',
+]
+
+init = executable('bst-init', bst_init_sources,
+	link_args: cc.get_supported_arguments([
+		'-static',
+	]),
+	install: true)
+
+bst_unpersist_sources = [
+	'capable.c',
+	'ns.c',
+	'path.c',
+	'unpersist.c',
+]
+
+unpersist = executable('bst-unpersist', bst_unpersist_sources, install: true)
+
+bst_sources = [
+	'bst_limits.c',
+	'capable.c',
+	'cp.c',
+	'enter.c',
+	'kvlist.c',
+	'main.c',
+	'mount.c',
+	'net.c',
+	'ns.c',
+	'outer.c',
+	'path.c',
+	'setarch.c',
+	'sig.c',
+	'timens.c',
+	'usage.c',
+	'userns.c',
+]
+
+executable('bst', bst_sources, install: true)
+
+if not get_option('no-setcap-or-suid')
+	capabilities = {
+		'bst': [
+			'cap_dac_override',
+			'cap_net_admin',
+			'cap_setgid',
+			'cap_setuid',
+			'cap_sys_admin',
+			'cap_sys_chroot',
+			'cap_sys_ptrace',
+		],
+		'bst-unpersist': [
+			'cap_sys_admin',
+		],
+	}
+
+	setcap = find_program('setcap', '/usr/sbin/setcap', '/sbin/setcap', required: false)
+	if setcap.found()
+		foreach bin, caps : capabilities
+			meson.add_install_script('/bin/sh', '-c', '@0@ @1@ ${MESON_INSTALL_DESTDIR_PREFIX}/bin/@2@'.format(setcap.path(), ','.join(caps) + '=p', bin))
+		endforeach
+	else
+		chmod = find_program('chmod')
+		foreach bin, _ : capabilities
+			meson.add_install_script('/bin/sh', '-c', '@0@ u+s ${MESON_INSTALL_DESTDIR_PREFIX}/bin/@1@'.format(chmod.path(), bin))
+		endforeach
+	endif
+endif
+
+if get_option('tests')
+	subdir('test')
+endif

meson_options.txt

@@ -0,0 +1,2 @@
+option('tests', type: 'boolean', value: true)
+option('no-setcap-or-suid', type: 'boolean', value: false)

test/meson.build

@@ -0,0 +1,9 @@
+test_limits = executable('test_limits', ['test_limit_parsing.c', '../bst_limits.c'])
+
+test('test_limits', test_limits)
+
+cram_sh = find_program('cram.sh')
+
+executable('print_limits', ['print_limits.c'])
+
+test('cram tests', cram_sh, args: [meson.current_source_dir()])