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-rw-r--r--src/systemd-system-update-generator/Makefile33
-rw-r--r--src/systemd-system-update-generator/system-update-generator.c73
-rw-r--r--src/systemd-system-update-generator/systemd-system-update-generator.xml75
3 files changed, 181 insertions, 0 deletions
diff --git a/src/systemd-system-update-generator/Makefile b/src/systemd-system-update-generator/Makefile
new file mode 100644
index 0000000000..5e66309753
--- /dev/null
+++ b/src/systemd-system-update-generator/Makefile
@@ -0,0 +1,33 @@
+# -*- Mode: makefile; indent-tabs-mode: t -*-
+#
+# This file is part of systemd.
+#
+# Copyright 2010-2012 Lennart Poettering
+# Copyright 2010-2012 Kay Sievers
+# Copyright 2013 Zbigniew Jędrzejewski-Szmek
+# Copyright 2013 David Strauss
+# Copyright 2016 Luke Shumaker
+#
+# systemd is free software; you can redistribute it and/or modify it
+# under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation; either version 2.1 of the License, or
+# (at your option) any later version.
+#
+# systemd is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with systemd; If not, see <http://www.gnu.org/licenses/>.
+include $(dir $(lastword $(MAKEFILE_LIST)))/../../config.mk
+include $(topsrcdir)/build-aux/Makefile.head.mk
+
+systemgenerator_PROGRAMS += systemd-system-update-generator
+systemd_system_update_generator_SOURCES = \
+ src/system-update-generator/system-update-generator.c
+
+systemd_system_update_generator_LDADD = \
+ libsystemd-shared.la
+
+include $(topsrcdir)/build-aux/Makefile.tail.mk
diff --git a/src/systemd-system-update-generator/system-update-generator.c b/src/systemd-system-update-generator/system-update-generator.c
new file mode 100644
index 0000000000..f66993811c
--- /dev/null
+++ b/src/systemd-system-update-generator/system-update-generator.c
@@ -0,0 +1,73 @@
+/***
+ This file is part of systemd.
+
+ Copyright 2012 Lennart Poettering
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <errno.h>
+#include <unistd.h>
+
+#include "systemd-basic/fs-util.h"
+#include "systemd-basic/log.h"
+#include "systemd-basic/string-util.h"
+#include "systemd-basic/util.h"
+
+/*
+ * Implements the logic described in
+ * http://freedesktop.org/wiki/Software/systemd/SystemUpdates
+ */
+
+static const char *arg_dest = "/tmp";
+
+static int generate_symlink(void) {
+ const char *p = NULL;
+
+ if (laccess("/system-update", F_OK) < 0) {
+ if (errno == ENOENT)
+ return 0;
+
+ log_error_errno(errno, "Failed to check for system update: %m");
+ return -EINVAL;
+ }
+
+ p = strjoina(arg_dest, "/default.target");
+ if (symlink(SYSTEM_DATA_UNIT_PATH "/system-update.target", p) < 0)
+ return log_error_errno(errno, "Failed to create symlink %s: %m", p);
+
+ return 0;
+}
+
+int main(int argc, char *argv[]) {
+ int r;
+
+ if (argc > 1 && argc != 4) {
+ log_error("This program takes three or no arguments.");
+ return EXIT_FAILURE;
+ }
+
+ if (argc > 1)
+ arg_dest = argv[2];
+
+ log_set_target(LOG_TARGET_SAFE);
+ log_parse_environment();
+ log_open();
+
+ umask(0022);
+
+ r = generate_symlink();
+
+ return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
+}
diff --git a/src/systemd-system-update-generator/systemd-system-update-generator.xml b/src/systemd-system-update-generator/systemd-system-update-generator.xml
new file mode 100644
index 0000000000..833ed79646
--- /dev/null
+++ b/src/systemd-system-update-generator/systemd-system-update-generator.xml
@@ -0,0 +1,75 @@
+<?xml version="1.0"?>
+<!--*-nxml-*-->
+<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
+<!--
+ This file is part of systemd.
+
+ Copyright 2012 Lennart Poettering
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+-->
+<refentry id="systemd-system-update-generator">
+
+ <refentryinfo>
+ <title>systemd-system-update-generator</title>
+ <productname>systemd</productname>
+
+ <authorgroup>
+ <author>
+ <contrib>Developer</contrib>
+ <firstname>Lennart</firstname>
+ <surname>Poettering</surname>
+ <email>lennart@poettering.net</email>
+ </author>
+ </authorgroup>
+ </refentryinfo>
+
+ <refmeta>
+ <refentrytitle>systemd-system-update-generator</refentrytitle>
+ <manvolnum>8</manvolnum>
+ </refmeta>
+
+ <refnamediv>
+ <refname>systemd-system-update-generator</refname>
+ <refpurpose>Generator for redirecting boot to offline update mode</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <para><filename>/usr/lib/systemd/system-generators/systemd-system-update-generator</filename></para>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para><filename>systemd-system-update-generator</filename> is a
+ generator that automatically redirects the boot process to
+ <filename>system-update.target</filename>, if
+ <filename>/system-update</filename> exists. This is required to
+ implement the logic explained in the
+ <citerefentry><refentrytitle>systemd.offline-updates</refentrytitle><manvolnum>7</manvolnum></citerefentry>.
+ </para>
+
+ <para><filename>systemd-system-update-generator</filename> implements
+ <citerefentry><refentrytitle>systemd.generator</refentrytitle><manvolnum>7</manvolnum></citerefentry>.</para>
+ </refsect1>
+
+ <refsect1>
+ <title>See Also</title>
+ <para>
+ <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>systemd.special</refentrytitle><manvolnum>7</manvolnum></citerefentry>
+ </para>
+ </refsect1>
+
+</refentry>