migrate fully to meson build system

- drop old build system
- move shared include and source files to common directory
- drop "rc-" prefix from shared include and source files
- move executable-specific code to individual directories under src
- adjust top-level .gitignore file for new build system

This closes #489.

src/service/meson.build

@@ -0,0 +1,20 @@
+service_execs = [
+  'service_starting',
+  'service_started',
+  'service_stopping',
+  'service_stopped',
+  'service_inactive',
+  'service_wasinactive',
+  'service_hotplugged',
+  'service_started_daemon',
+  'service_crashed',
+  ]
+
+foreach exec : service_execs
+  executable(exec,
+    ['service.c', misc_c, version_h],
+    include_directories: [incdir, einfo_incdir, rc_incdir],
+    link_with: [libeinfo, librc],
+    install: true,
+    install_dir: rc_bindir)
+endforeach

src/service/service.c

@@ -0,0 +1,76 @@
+/*
+ * Copyright (c) 2007-2015 The OpenRC Authors.
+ * See the Authors file at the top-level directory of this distribution and
+ * https://github.com/OpenRC/openrc/blob/HEAD/AUTHORS
+ *
+ * This file is part of OpenRC. It is subject to the license terms in
+ * the LICENSE file found in the top-level directory of this
+ * distribution and at https://github.com/OpenRC/openrc/blob/HEAD/LICENSE
+ * This file may not be copied, modified, propagated, or distributed
+ *    except according to the terms contained in the LICENSE file.
+ */
+
+#include <sys/types.h>
+#include <sys/time.h>
+
+#include <errno.h>
+#include <ctype.h>
+#include <inttypes.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <signal.h>
+#include <string.h>
+#include <syslog.h>
+#include <time.h>
+#include <unistd.h>
+
+#include "einfo.h"
+#include "rc.h"
+#include "misc.h"
+
+const char *applet = NULL;
+
+int main(int argc, char **argv)
+{
+	bool ok = false;
+	char *service;
+	char *exec;
+	int idx = 0;
+	RC_SERVICE state, bit;
+
+	applet = basename_c(argv[0]);
+	if (argc > 1)
+		service = argv[1];
+	else
+		service = getenv("RC_SVCNAME");
+
+	if (service == NULL || *service == '\0')
+		eerrorx("%s: no service specified", applet);
+
+	state = rc_service_state(service);
+	bit = lookup_service_state(applet);
+	if (bit) {
+		ok = (state & bit);
+	} else if (strcmp(applet, "service_started_daemon") == 0) {
+		service = getenv("RC_SVCNAME");
+		exec = argv[1];
+		if (argc > 3) {
+			service = argv[1];
+			exec = argv[2];
+			sscanf(argv[3], "%d", &idx);
+		} else if (argc == 3) {
+			if (sscanf(argv[2], "%d", &idx) != 1) {
+				service = argv[1];
+				exec = argv[2];
+			}
+		}
+		ok = rc_service_started_daemon(service, exec, NULL, idx);
+
+	} else if (strcmp(applet, "service_crashed") == 0) {
+		ok = ( rc_service_daemons_crashed(service) && errno != EACCES);
+	} else
+		eerrorx("%s: unknown applet", applet);
+
+	return ok ? EXIT_SUCCESS : EXIT_FAILURE;
+}