Merge daemon binary into main binary

The actual problem I am trying to fix with this is fallout from the
introduction of `/usr/libexec/rpm-ostreed`, which required a SELinux
policy change.  Specifically for CentOS, the base policy is rev'd
slowly.

My hope was that by merging the daemon code back into `/usr/bin/rpm-ostree`
which is labeled `install_exec_t`, starting via systemd would do
the right thing.  It turns out that doesn't happen.

Now later, I'm picking this patch back up because I want to do multprocessing in
the daemon (and in the core), and it makes sense to share code between them,
because multiprocessing will need to go through a re-exec path.

Another benefit is we avoid duplicated text (libglnx, internal helpers) between
the two binaries.

Closes: #292
Approved by: jlebon

Makefile-daemon.am

@@ -1,5 +1,3 @@
-libexec_PROGRAMS += rpm-ostreed
-
 dbus_built_sources = rpm-ostreed-generated.h rpm-ostreed-generated.c
 
 rpm-ostreed-generated.h: rpm-ostreed-generated.c
@@ -64,24 +62,6 @@ librpmostreed_la_LIBADD = \
 	$(CAP_LIBS)
 	$(NULL)
 
-rpm_ostreed_SOURCES = \
-	src/daemon/main.c \
-	$(NULL)
-
-rpm_ostreed_CFLAGS = \
-	$(AM_CFLAGS) \
-	-DPKGLIBDIR=\"$(pkglibdir)\" \
-	$(PKGDEP_RPMOSTREE_CFLAGS) \
-	-I$(srcdir)/src/daemon \
-	-I$(srcdir)/libglnx \
-	-DG_LOG_DOMAIN=\"rpm-ostreed\" \
-	$(NULL)
-
-rpm_ostreed_LDADD = \
-	librpmostreed.la \
-	$(PKGDEP_RPMOSTREE_LIBS) \
-	$(NULL)
-
 dbusconf_DATA = $(srcdir)/src/daemon/org.projectatomic.rpmostree1.conf
 dbusconfdir = ${sysconfdir}/dbus-1/system.d
 
@@ -96,9 +76,13 @@ endif
 $(systemdunit_DATA): Makefile
 	$(SED_SUBST) $(daemon_asan_options) $@.in > $@
 
+# We keep this stub script around to have SELinux labeling work,
+# plus some backwards compatibility.
+libexec_SCRIPTS = rpm-ostreed
+rpm-ostreed: $(srcdir)/src/daemon/rpm-ostreed-stub.sh.in Makefile
+	$(SED_SUBST) $< > $@.tmp && mv $@.tmp $@
+
 install-daemon-altname-hook:
-	mv $(DESTDIR)$(libexecdir)/rpm-ostreed $(DESTDIR)$(libexecdir)/$(primaryname)d
-	ln -sf $(primaryname)d $(DESTDIR)$(libexecdir)/rpm-ostreed
 	mv $(DESTDIR)$(systemdunitdir)/rpm-ostreed.service $(DESTDIR)$(systemdunitdir)/$(primaryname)d.service
 	ln -sf $(primaryname)d.service $(DESTDIR)$(systemdunitdir)/rpm-ostreed.service
 if BUILDOPT_NEW_NAME
@@ -109,8 +93,8 @@ endif
 service_in_files = $(srcdir)/src/daemon/org.projectatomic.rpmostree1.service.in
 service_DATA     = $(service_in_files:.service.in=.service)
 servicedir       = $(dbusservicedir)
-$(service_DATA):
+%.service: %.service.in Makefile
-	$(SED_SUBST) $@.in > $@
+	$(SED_SUBST) $@.in > $@.tmp && mv $@.tmp $@
 
 EXTRA_DIST += \
 	$(dbusservice_DATA) \

Makefile-rpm-ostree.am

@@ -41,6 +41,7 @@ rpm_ostree_SOURCES = src/app/main.c \
 	src/app/rpmostree-container-builtins.h \
 	src/app/rpmostree-container-builtins.c \
 	src/app/rpmostree-internals-builtin-unpack.c \
+	src/app/rpmostree-internals-builtin-start-daemon.c \
 	src/app/rpmostree-libbuiltin.c \
 	src/app/rpmostree-libbuiltin.h \
 	$(NULL)
@@ -53,8 +54,10 @@ rpm_ostree_SOURCES += \
 	$(NULL)
 endif
 
-rpm_ostree_CFLAGS = $(AM_CFLAGS) -I$(srcdir)/src/app -I$(srcdir)/src/lib -I$(srcdir)/src/libpriv -I$(libglnx_srcpath) -DPKGLIBDIR=\"$(pkglibdir)\" $(PKGDEP_RPMOSTREE_CFLAGS)
+rpm_ostree_CFLAGS = $(AM_CFLAGS) -I$(srcdir)/src/app -I$(srcdir)/src/daemon \
-rpm_ostree_LDADD = $(PKGDEP_RPMOSTREE_LIBS) librpmostreepriv.la librpmostree-1.la
+	-I$(srcdir)/src/lib -I$(srcdir)/src/libpriv -I$(libglnx_srcpath) \
+  -DPKGLIBDIR=\"$(pkglibdir)\" $(PKGDEP_RPMOSTREE_CFLAGS)
+rpm_ostree_LDADD = $(PKGDEP_RPMOSTREE_LIBS) librpmostreepriv.la librpmostree-1.la librpmostreed.la
 
 privdatadir=$(pkglibdir)
 privdata_DATA = src/app/rpm-ostree-0-integration.conf

Makefile.am

@@ -50,6 +50,7 @@ GITIGNOREFILES += build-aux/ gtk-doc.make config.h.in aclocal.m4 insttree/
 SED_SUBST = sed \
         -e 's,[@]libexecdir[@],$(libexecdir),g' \
         -e 's,[@]primaryname[@],$(primaryname),g' \
+        -e 's,[@]bindir[@],$(bindir),g' \
         $(NULL)
 
 libglnx_srcpath := $(srcdir)/libglnx

src/app/rpmostree-builtin-internals.c

@@ -30,6 +30,7 @@ typedef struct {
 
 static RpmOstreeInternalsCommand internals_subcommands[] = {
   { "unpack", rpmostree_internals_builtin_unpack },
+  { "start-daemon", rpmostree_internals_builtin_start_daemon },
   { NULL, NULL }
 };
 

src/app/rpmostree-dbus-helpers.c

@@ -52,7 +52,9 @@ get_connection_for_path (gchar *sysroot,
   gboolean ret = FALSE;
 
   const gchar *args[] = {
-    "rpm-ostreed",
+    "rpm-ostree",
+    "internals",
+    "start-daemon",
     "--sysroot", sysroot,
     "--dbus-peer", buffer,
     NULL

src/app/rpmostree-internals-builtin-start-daemon.c

@@ -1,33 +1,39 @@
-/*
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*-
-* Copyright (C) 2007-2010 David Zeuthen <zeuthen@gmail.com>
+ *
-* Copyright (C) 2013-2015 Red Hat, Inc.
+ * Copyright (C) 2016 Colin Walters <walters@verbum.org>
-*
+ *
-* This program is free software; you can redistribute it and/or modify
+ * This program is free software: you can redistribute it and/or modify
-* it under the terms of the GNU General Public License as published by
+ * it under the terms of the GNU Lesser General Public License as published
-* the Free Software Foundation; either version 2 of the License, or
+ * by the Free Software Foundation; either version 2 of the licence or (at
-* (at your option) any later version.
+ * your option) any later version.
-*
+ *
-* This program is distributed in the hope that it will be useful,
+ * This library is distributed in the hope that it will be useful,
-* but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-* GNU General Public License for more details.
+ * Lesser General Public License for more details.
-*
+ *
-* You should have received a copy of the GNU General Public License
+ * You should have received a copy of the GNU Lesser General
-* along with this program; if not, write to the Free Software
+ * Public License along with this library; if not, write to the
-* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
-*/
+ * Boston, MA 02111-1307, USA.
+ */
 
 #include "config.h"
 
-#include "rpmostreed-daemon.h"
+#include <string.h>
-
-#include <glib/gi18n.h>
 #include <glib-unix.h>
-#include <gio/gio.h>
+#include <gio/gunixoutputstream.h>
+#include <stdio.h>
+#include <libglnx.h>
+#include <glib/gi18n.h>
 #include <syslog.h>
 #include "libglnx.h"
 
-/* ---------------------------------------------------------------------------------------------------- */
+#include "rpmostree-internals-builtins.h"
+#include "rpmostree-util.h"
+#include "rpmostreed-daemon.h"
+#include "rpmostree-libbuiltin.h"
+
 static GMainLoop *loop = NULL;
 static gboolean opt_debug = FALSE;
 static char *opt_sysroot = "/";
@@ -292,38 +298,23 @@ out:
 
 
 int
-main (int argc,
+rpmostree_internals_builtin_start_daemon (int             argc,
-      char **argv)
+                                          char          **argv,
+                                          GCancellable   *cancellable,
+                                          GError        **error)
 {
-  GError *error;
+  int ret = 1;
-  g_autoptr(GOptionContext) opt_context = NULL;
+  g_autoptr(GMainLoop) loop = NULL;
+  g_autoptr(GOptionContext) opt_context = g_option_context_new ("rpm-ostreed -- rpm-ostree daemon");
   GIOChannel *channel;
   guint name_owner_id = 0;
-  gint ret;
 
-  ret = 1;
-  loop = NULL;
-
-  #if !GLIB_CHECK_VERSION(2,36,0)
-  g_type_init ();
-  #endif
-
-  /* See glib/gio/gsocket.c */
-  signal (SIGPIPE, SIG_IGN);
-
-  /* avoid gvfs and gsettings: https://bugzilla.gnome.org/show_bug.cgi?id=767183 */
-  g_assert (g_setenv ("GIO_USE_VFS", "local", TRUE));
   g_assert (g_setenv ("GSETTINGS_BACKEND", "memory", TRUE));
 
-  opt_context = g_option_context_new ("rpm-ostreed -- rpm-ostree daemon");
   g_option_context_add_main_entries (opt_context, opt_entries, NULL);
-  error = NULL;
+
-  if (!g_option_context_parse (opt_context, &argc, &argv, &error))
+  if (!g_option_context_parse (opt_context, &argc, &argv, error))
-    {
+    goto out;
-      g_printerr ("Error parsing options: %s\n", error->message);
-      g_error_free (error);
-      goto out;
-    }
 
   if (opt_debug)
     {
@@ -371,10 +362,7 @@ main (int argc,
                                       NULL, (GDestroyNotify) NULL);
     }
   else if (!connect_to_peer (service_dbus_fd))
-    {
+    goto out;
-      ret = 1;
-      goto out;
-    }
 
   g_debug ("Entering main event loop");
 
@@ -391,10 +379,5 @@ main (int argc,
   ret = 0;
 
 out:
-  if (loop != NULL)
-    g_main_loop_unref (loop);
-
-  g_info ("rpm-ostreed exiting");
-
   return ret;
 }

src/app/rpmostree-internals-builtins.h

@@ -27,6 +27,7 @@
 G_BEGIN_DECLS
 
 gboolean rpmostree_internals_builtin_unpack (int argc, char **argv, GCancellable *cancellable, GError **error);
+gboolean rpmostree_internals_builtin_start_daemon (int argc, char **argv, GCancellable *cancellable, GError **error);
 
 G_END_DECLS
 

src/daemon/org.projectatomic.rpmostree1.service.in

@@ -1,5 +1,5 @@
 [D-BUS Service]
 Name=org.projectatomic.rpmostree1
-Exec=@libexecdir@/@primaryname@d
+Exec=@bindir@/rpm-ostree internals start-daemon
 User=root
 SystemdService=@primaryname@d.service

src/daemon/rpm-ostreed-stub.sh.in

@@ -0,0 +1,2 @@
+#!/bin/sh
+exec @bindir@/rpm-ostree internals start-daemon "$@"

src/daemon/rpm-ostreed.service.in

@@ -6,4 +6,4 @@ ConditionPathExists=/ostree
 Type=dbus
 BusName=org.projectatomic.rpmostree1
 @SYSTEMD_ENVIRON@
-ExecStart=@libexecdir@/@primaryname@d
+ExecStart=@bindir@/rpm-ostree internals start-daemon

tests/utils/setup-session.sh

@@ -25,7 +25,7 @@ set -e
 
 # libtest.sh should have added the builddir which contains rpm-ostreed to our
 # path
-exec_binary="$(which rpm-ostreed)"
+exec_binary="$(which rpm-ostree)"
 
 mkdir -p sysroot
 mkdir -p session-services
@@ -56,7 +56,7 @@ EOF
 cat > session-services/rpmostree.service <<EOF
 [D-BUS Service]
 Name=org.projectatomic.rpmostree1
-Exec=${exec_binary} --debug --sysroot=${test_tmpdir}/sysroot
+Exec=${exec_binary} internals start-daemon --debug --sysroot=${test_tmpdir}/sysroot
 EOF
 
 # Tell rpm-ostree to connect to the session bus instead of system

tests/vmcheck/overlay.sh

@@ -18,7 +18,7 @@ if test -z "${INSIDE_VM:-}"; then
     DESTDIR=$(pwd)/insttree
     make install DESTDIR=${DESTDIR}
     for san in a t ub; do
-        if eu-readelf -d ${DESTDIR}/usr/libexec/rpm-ostreed | grep -q "NEEDED.*lib${san}san"; then
+        if eu-readelf -d ${DESTDIR}/usr/bin/rpm-ostree | grep -q "NEEDED.*lib${san}san"; then
             echo "Installing extra sanitizier: lib${san}san"
             cp /usr/lib64/lib${san}san*.so.* ${DESTDIR}/usr/lib64
         fi

tests/vmcheck/sync.sh

@@ -27,6 +27,7 @@ else
     set -x
     ostree admin unlock || :
     rsync -rlv /var/roothome/sync/insttree/usr/ /usr/
-    restorecon /usr/libexec/rpm-ostreed
+    restorecon -v /usr/bin/rpm-ostree
+    restorecon -v /usr/libexec/rpm-ostreed
     systemctl restart rpm-ostreed
 fi