./tools/notsd-move

4 files changed, 332 insertions, 0 deletions

diff --git a/src/systemd-debug-generator/GNUmakefile b/src/systemd-debug-generator/GNUmakefile
new file mode 120000
index 0000000000..0f24a727ed
--- /dev/null
+++ b/src/systemd-debug-generator/GNUmakefile
@@ -0,0 +1 @@
+GNUmakefile
\ No newline at end of file
diff --git a/src/systemd-debug-generator/Makefile b/src/systemd-debug-generator/Makefile
new file mode 100644
index 0000000000..542d8b5a5a
--- /dev/null
+++ b/src/systemd-debug-generator/Makefile
@@ -0,0 +1,34 @@
+#  -*- 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-debug-generator
+
+systemd_debug_generator_SOURCES = \
+	src/debug-generator/debug-generator.c
+
+systemd_debug_generator_LDADD = \
+	libsystemd-shared.la
+
+include $(topsrcdir)/build-aux/Makefile.tail.mk
diff --git a/src/systemd-debug-generator/debug-generator.c b/src/systemd-debug-generator/debug-generator.c
new file mode 100644
index 0000000000..88324894ac
--- /dev/null
+++ b/src/systemd-debug-generator/debug-generator.c
@@ -0,0 +1,202 @@
+/***
+  This file is part of systemd.
+
+  Copyright 2014 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 "systemd-basic/alloc-util.h"
+#include "systemd-basic/mkdir.h"
+#include "systemd-basic/parse-util.h"
+#include "systemd-basic/proc-cmdline.h"
+#include "systemd-basic/special.h"
+#include "systemd-basic/string-util.h"
+#include "systemd-basic/strv.h"
+#include "systemd-basic/unit-name.h"
+#include "systemd-basic/util.h"
+
+static char *arg_default_unit = NULL;
+static const char *arg_dest = "/tmp";
+static char **arg_mask = NULL;
+static char **arg_wants = NULL;
+static bool arg_debug_shell = false;
+
+static int parse_proc_cmdline_item(const char *key, const char *value, void *data) {
+        int r;
+
+        assert(key);
+
+        if (streq(key, "systemd.mask")) {
+
+                if (!value)
+                        log_error("Missing argument for systemd.mask= kernel command line parameter.");
+                else {
+                        char *n;
+
+                        r = unit_name_mangle(value, UNIT_NAME_NOGLOB, &n);
+                        if (r < 0)
+                                return log_error_errno(r, "Failed to glob unit name: %m");
+
+                        r = strv_consume(&arg_mask, n);
+                        if (r < 0)
+                                return log_oom();
+                }
+
+        } else if (streq(key, "systemd.wants")) {
+
+                if (!value)
+                        log_error("Missing argument for systemd.want= kernel command line parameter.");
+                else {
+                        char *n;
+
+                        r = unit_name_mangle(value, UNIT_NAME_NOGLOB, &n);
+                        if (r < 0)
+                                return log_error_errno(r, "Failed to glob unit name: %m");
+
+                        r = strv_consume(&arg_wants, n);
+                        if (r < 0)
+                                return log_oom();
+                }
+
+        } else if (streq(key, "systemd.debug-shell")) {
+
+                if (value) {
+                        r = parse_boolean(value);
+                        if (r < 0)
+                                log_error("Failed to parse systemd.debug-shell= argument '%s', ignoring.", value);
+                        else
+                                arg_debug_shell = r;
+                } else
+                        arg_debug_shell = true;
+        } else if (streq(key, "systemd.unit")) {
+
+                if (!value)
+                        log_error("Missing argument for systemd.unit= kernel command line parameter.");
+                else {
+                        r = free_and_strdup(&arg_default_unit, value);
+                        if (r < 0)
+                                return log_error_errno(r, "Failed to set default unit %s: %m", value);
+                }
+        } else if (!value) {
+                const char *target;
+
+                target = runlevel_to_target(key);
+                if (target) {
+                        r = free_and_strdup(&arg_default_unit, target);
+                        if (r < 0)
+                                return log_error_errno(r, "Failed to set default unit %s: %m", target);
+                }
+        }
+
+        return 0;
+}
+
+static int generate_mask_symlinks(void) {
+        char **u;
+        int r = 0;
+
+        if (strv_isempty(arg_mask))
+                return 0;
+
+        STRV_FOREACH(u, arg_mask) {
+                _cleanup_free_ char *p = NULL;
+
+                p = strjoin(arg_dest, "/", *u, NULL);
+                if (!p)
+                        return log_oom();
+
+                if (symlink("/dev/null", p) < 0)
+                        r = log_error_errno(errno,
+                                            "Failed to create mask symlink %s: %m",
+                                            p);
+        }
+
+        return r;
+}
+
+static int generate_wants_symlinks(void) {
+        char **u;
+        int r = 0;
+
+        if (strv_isempty(arg_wants))
+                return 0;
+
+        STRV_FOREACH(u, arg_wants) {
+                _cleanup_free_ char *p = NULL, *f = NULL;
+
+                p = strjoin(arg_dest, "/", arg_default_unit, ".wants/", *u, NULL);
+                if (!p)
+                        return log_oom();
+
+                f = strappend(SYSTEM_DATA_UNIT_PATH "/", *u);
+                if (!f)
+                        return log_oom();
+
+                mkdir_parents_label(p, 0755);
+
+                if (symlink(f, p) < 0)
+                        r = log_error_errno(errno,
+                                            "Failed to create wants symlink %s: %m",
+                                            p);
+        }
+
+        return r;
+}
+
+int main(int argc, char *argv[]) {
+        int r, q;
+
+        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 = free_and_strdup(&arg_default_unit, SPECIAL_DEFAULT_TARGET);
+        if (r < 0) {
+                log_error_errno(r, "Failed to set default unit %s: %m", SPECIAL_DEFAULT_TARGET);
+                goto finish;
+        }
+
+        r = parse_proc_cmdline(parse_proc_cmdline_item, NULL, false);
+        if (r < 0)
+                log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m");
+
+        if (arg_debug_shell) {
+                r = strv_extend(&arg_wants, "debug-shell.service");
+                if (r < 0) {
+                        r = log_oom();
+                        goto finish;
+                }
+        }
+
+        r = generate_mask_symlinks();
+
+        q = generate_wants_symlinks();
+        if (q < 0)
+                r = q;
+
+finish:
+        return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
+
+}
diff --git a/src/systemd-debug-generator/systemd-debug-generator.xml b/src/systemd-debug-generator/systemd-debug-generator.xml
new file mode 100644
index 0000000000..5c5e9fc4a1
--- /dev/null
+++ b/src/systemd-debug-generator/systemd-debug-generator.xml
@@ -0,0 +1,95 @@
+<?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 2014 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-debug-generator">
+
+  <refentryinfo>
+    <title>systemd-debug-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-debug-generator</refentrytitle>
+    <manvolnum>8</manvolnum>
+  </refmeta>
+
+  <refnamediv>
+    <refname>systemd-debug-generator</refname>
+    <refpurpose>Generator for enabling a runtime debug shell and
+    masking specific units at boot</refpurpose>
+  </refnamediv>
+
+  <refsynopsisdiv>
+    <para><filename>/usr/lib/systemd/system-generators/systemd-debug-generator</filename></para>
+  </refsynopsisdiv>
+
+  <refsect1>
+    <title>Description</title>
+
+    <para><filename>systemd-debug-generator</filename> is a generator
+    that reads the kernel command line and understands three
+    options:</para>
+
+    <para>If the <option>systemd.mask=</option> option is specified
+    and followed by a unit name, this unit is masked for the runtime,
+    similar to the effect of
+    <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>'s
+    <command>mask</command> command. This is useful to boot with
+    certain units removed from the initial boot transaction for
+    debugging system startup. May be specified more than once.</para>
+
+    <para>If the <option>systemd.wants=</option> option is specified
+    and followed by a unit name, a start job for this unit is added to
+    the initial transaction. This is useful to start one or more
+    additional units at boot. May be specified more than once.</para>
+
+    <para>If the <option>systemd.debug-shell</option> option is
+    specified, the debug shell service
+    <literal>debug-shell.service</literal> is pulled into the boot
+    transaction. It will spawn a debug shell on tty9 during early
+    system startup. Note that the shell may also be turned on
+    persistently by enabling it with
+    <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>'s
+    <command>enable</command> command.</para>
+
+    <para><filename>systemd-debug-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>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+      <citerefentry><refentrytitle>kernel-command-line</refentrytitle><manvolnum>7</manvolnum></citerefentry>
+    </para>
+  </refsect1>
+
+</refentry>