Issue #14: Improved support for static Finit builds

- Upgrade libite (LITE) for new UNIX file parser API to improve static
  builds of Finit.
- Re-enable bootmisc plugin for static builds by adding built-in support
  for reading GID from /etc/group.
- Allow inetd support for static builds by adding built-in support for
  reading service and protocol from /etc/services and /etc/protocols.
- Do not try to install/uninstall any plugins for static builds.

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>

helpers.c

@@ -174,27 +174,33 @@ int print_result(int fail)
 	return fail;
 }
 
-#ifndef ENABLE_STATIC
 int getuser(char *username)
 {
+#ifdef ENABLE_STATIC
+	return fgetint("/etc/passwd", "x:\n", username);
+#else
 	struct passwd *usr;
 
 	if (!username || (usr = getpwnam(username)) == NULL)
 		return -1;
 
 	return usr->pw_uid;
+#endif
 }
 
 int getgroup(char *group)
 {
+#ifdef ENABLE_STATIC
+	return fgetint("/etc/group", "x:\n", group);
+#else
 	struct group *grp;
 
 	if ((grp = getgrnam(group)) == NULL)
 		return -1;
 
 	return grp->gr_gid;
-}
 #endif
+}
 
 /* Signal safe sleep ... we get a lot of SIGCHLD at reboot */
 void do_sleep(unsigned int sec)

inetd.c

@@ -217,7 +217,22 @@ void inetd_stop(inetd_t *inetd)
 
 static int getent(char *service, char *proto, struct servent **sv, struct protoent **pv)
 {
+#ifdef ENABLE_STATIC
+	int service_num;
+	static struct servent lfs;
+
+	service_num = fgetint("/etc/services", " \n\t", service);
+	if (service_num > 0) {
+		lfs.s_name = service;
+		lfs.s_port = htons(service_num);
+		lfs.s_proto = NULL;
+		if (!strcmp("tcp", proto) || !strcmp("udp", proto))
+			lfs.s_proto = proto;
+		*sv = &lfs;
+	}
+#else
 	*sv = getservbyname(service, proto);
+#endif
 	if (!*sv) {
 		const char *errstr;
 		static struct servent s;
@@ -238,8 +253,20 @@ static int getent(char *service, char *proto, struct servent **sv, struct protoe
 		*sv = &s;
 	}
 
-	if (pv) {
+	if (pv && (*sv)->s_proto) {
+#ifdef ENABLE_STATIC
+		int proto_num;
+		static struct protoent lfp;
+
+		proto_num = fgetint("/etc/protocols", " \n\t", (*sv)->s_proto);
+		if (proto_num > 0) {
+			lfp.p_name  = proto;
+			lfp.p_proto = proto_num;
+		}
+		*pv = &lfp;
+#else
 		*pv = getprotobyname((*sv)->s_proto);
+#endif
 		if (!*pv) {
 			_e("Cannot find proto %s, skipping.", (*sv)->s_proto);
 			return errno = EINVAL;

plugin.c

@@ -317,6 +317,8 @@ int plugin_load_all(uev_ctx_t *ctx, char *path)
 	closedir(dp);
 #else
 	_d("Finit built statically, not loading plugins from %s ...", path);
+	if (verbose)
+		print_desc("Initializing plugins", NULL);
 #endif	/* ENABLE_STATIC */
 
 	/* Always initialize plugins */

plugins/Makefile

@@ -27,6 +27,7 @@ clean:
 distclean:
 	-@$(RM) *.o *.so $(JUNK) $(DEPS)
 
+ifneq ($(STATIC), 1)
 install: all
 	@install -d $(DESTDIR)$(plugindir)
 	@for plugin in $(PLUGINS); do \
@@ -40,6 +41,12 @@ uninstall:
 		rm $(DESTDIR)$(plugindir)/$$plugin 2>/dev/null; 	\
 	done
 	-@rmdir $(DESTDIR)$(plugindir) 2>/dev/null
+else
+install:
+	@true
+uninstall:
+	@true
+endif
 
 ifneq ($(MAKECMDGOALS),distclean)
 -include $(DEPS)

plugins/bootmisc.c

@@ -29,9 +29,6 @@
 #include "../plugin.h"
 #include "libite/lite.h"
 
-/* This plugin uses getuser(), which relies on dynamically linked GLIBC.  Cannot be built statically! */
-#ifndef ENABLE_STATIC
-
 /*
  * Setup standard FHS 2.3 structure in /var, and
  * write runlevel to UTMP, needed by, e.g., printerdrake.
@@ -104,8 +101,6 @@ PLUGIN_EXIT(plugin_exit)
 	plugin_unregister(&plugin);
 }
 
-#endif/* ENABLE_STATIC */
-
 /**
  * Local Variables:
  *  version-control: t