bootctl: add sd-boot support

11 files changed, 1592 insertions, 632 deletions

diff --git a/Makefile.am b/Makefile.am
index d739445e83..5a17642f7b 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -2479,15 +2479,21 @@ systemd_efi_boot_generator_LDADD = \
 
 # ------------------------------------------------------------------------------
 bootctl_SOURCES = \
-	src/boot/boot.h \
-	src/boot/boot-loader.h \
-	src/boot/bootctl.c \
-	src/boot/boot-loader.c \
-	src/boot/boot-efi.c
+	src/boot/bootctl.c
+
+bootctl_CPPFLAGS = \
+	$(AM_CPPFLAGS) \
+	-DEFI_MACHINE_TYPE_NAME=\"$(EFI_MACHINE_TYPE_NAME)\" \
+	-DSD_BOOTLIBDIR=\"$(sd_bootlibdir)\"
+
+bootctl_CFLAGS = \
+	$(AM_CFLAGS) \
+	$(BLKID_CFLAGS)
 
 bootctl_LDADD = \
 	libsystemd-shared.la \
-	libsystemd-internal.la
+	libsystemd-internal.la \
+	$(BLKID_LIBS)
 
 bin_PROGRAMS += \
 	bootctl
diff --git a/man/bootctl.xml b/man/bootctl.xml
index 00f54c73fc..99863bf31e 100644
--- a/man/bootctl.xml
+++ b/man/bootctl.xml
@@ -21,7 +21,6 @@
 
 <refentry id="bootctl" conditional='ENABLE_EFI'
     xmlns:xi="http://www.w3.org/2001/XInclude">
-
   <refentryinfo>
     <title>bootctl</title>
     <productname>systemd</productname>
@@ -48,65 +47,82 @@
 
   <refsynopsisdiv>
     <cmdsynopsis>
-      <command>bootctl</command>
-      <arg choice="opt" rep="repeat">OPTIONS</arg>
-      <arg choice="req">COMMAND</arg>
+      <command>bootctl <arg choice="opt" rep="repeat">OPTIONS</arg>status</command>
+    </cmdsynopsis>
+    <cmdsynopsis>
+      <command>bootctl <arg choice="opt" rep="repeat">OPTIONS</arg>update</command>
+    </cmdsynopsis>
+    <cmdsynopsis>
+      <command>bootctl <arg choice="opt" rep="repeat">OPTIONS</arg>install</command>
+    </cmdsynopsis>
+    <cmdsynopsis>
+      <command>bootctl <arg choice="opt" rep="repeat">OPTIONS</arg>remove</command>
     </cmdsynopsis>
   </refsynopsisdiv>
 
   <refsect1>
     <title>Description</title>
 
-    <para><command>bootctl</command> may be used to query or (in the
-    future) change the firmware and boot manager settings.</para>
-
-    <para>Firmware information is available only on EFI systems.
-    </para>
-
-    <para>Currently, only the
-    <citerefentry project='gummiboot'><refentrytitle>gummiboot</refentrytitle><manvolnum>8</manvolnum></citerefentry>
-    boot manager implements the required boot loader interface to
-    provide complete boot manager information.</para>
+    <para><command>bootctl</command> checks, updates,
+    installs or removes the boot loader from the current
+    system.</para>
+
+    <para><command>bootctl status</command> checks and prints the
+    currently installed versions of the boot loader binaries and the
+    all current EFI boot variables.</para>
+
+    <para><command>bootctl update</command> updates all installed
+    versions of sd-boot, if the current version is newer than the
+    version installed in the EFI system partition. This also includes
+    the EFI default/fallback loader at /EFI/Boot/boot*.efi. An
+    sd-boot entry in the EFI boot variables is created, if there
+    is no current entry. A created entry will be added to the end of
+    the boot order list.</para>
+
+    <para><command>bootctl install</command> installs sd-boot into
+    the EFI system partition. A copy of sd-boot will be stored as
+    the EFI default/fallback loader at /EFI/Boot/boot*.efi. An sd-boot
+    entry in the EFI boot variables is created and added to the top
+    of the boot order list.</para>
+
+    <para><command>bootctl remove</command> removes all installed
+    versions of sd-boot from the EFI system partition, and removes
+    sd-boot from the EFI boot variables.</para>
+
+    <para>If no command is passed <command>status</command> is
+    implied.</para>
   </refsect1>
 
   <refsect1>
     <title>Options</title>
-
     <para>The following options are understood:</para>
 
     <variablelist>
       <xi:include href="standard-options.xml" xpointer="help" />
       <xi:include href="standard-options.xml" xpointer="version" />
-    </variablelist>
-
-    <para>The following commands are understood:</para>
-
-    <variablelist>
       <varlistentry>
-        <term><command>status</command></term>
+        <term><option>--path</option></term>
+        <listitem><para>Path to the EFI system partition. The default is /boot.</para></listitem>
+      </varlistentry>
 
-        <listitem><para>Show firmware and boot manager information
-        about the system, including secure boot mode status and
-        selected firmware entry (where available).</para></listitem>
+      <varlistentry>
+        <term><option>--no-variables</option></term>
+        <listitem><para>Do not touch the EFI boot variables.</para></listitem>
       </varlistentry>
     </variablelist>
-
   </refsect1>
 
   <refsect1>
     <title>Exit status</title>
-
-    <para>On success, 0 is returned, a non-zero failure code
-    otherwise.</para>
+    <para>On success 0 is returned, a non-zero failure
+    code otherwise.</para>
   </refsect1>
 
   <refsect1>
     <title>See Also</title>
     <para>
-      <ulink url="http://www.freedesktop.org/wiki/Software/systemd/BootLoaderInterface">Boot loader interface</ulink>,
-      <ulink url="http://www.freedesktop.org/wiki/Specifications/BootLoaderSpec">Boot loader specification</ulink>,
-      <ulink url="http://www.freedesktop.org/wiki/Software/gummiboot/">gummiboot</ulink>
+      <ulink url="http://www.freedesktop.org/wiki/Specifications/BootLoaderSpec">Boot loader specification</ulink>
+      <ulink url="http://www.freedesktop.org/wiki/Software/systemd/BootLoaderInterface">Systemd boot loader interface</ulink>
     </para>
   </refsect1>
-
 </refentry>
diff --git a/man/custom-html.xsl b/man/custom-html.xsl
index 32299db710..2cb7b76ae2 100644
--- a/man/custom-html.xsl
+++ b/man/custom-html.xsl
@@ -87,10 +87,6 @@
   </a>
 </xsl:template>
 
-<xsl:template match="citerefentry[@project='gummiboot']">
-  <xsl:call-template name="inline.charseq"/>
-</xsl:template>
-
 <xsl:template match="refsect1/title|refsect1/info/title">
   <!-- the ID is output in the block.object call for refsect1 -->
   <h2>
diff --git a/man/systemd-efi-boot-generator.xml b/man/systemd-efi-boot-generator.xml
index b2d8d65e3d..d05d84abb9 100644
--- a/man/systemd-efi-boot-generator.xml
+++ b/man/systemd-efi-boot-generator.xml
@@ -80,7 +80,6 @@
       <citerefentry><refentrytitle>systemd.mount</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
       <citerefentry><refentrytitle>systemd.automount</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
       <citerefentry><refentrytitle>systemd-gpt-auto-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
-      <citerefentry><refentrytitle>gummiboot</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
       <citerefentry><refentrytitle>fstab</refentrytitle><manvolnum>5</manvolnum></citerefentry>
     </para>
   </refsect1>
diff --git a/src/boot/boot-efi.c b/src/boot/boot-efi.c
deleted file mode 100644
index bd0c59bd5a..0000000000
--- a/src/boot/boot-efi.c
+++ /dev/null
@@ -1,190 +0,0 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
-  This file is part of systemd.
-
-  Copyright 2013 Kay Sievers
-
-  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 <stdlib.h>
-#include <stdbool.h>
-#include <unistd.h>
-#include <getopt.h>
-#include <locale.h>
-#include <string.h>
-#include <fnmatch.h>
-#include <fcntl.h>
-#include <sys/timex.h>
-
-#include "boot.h"
-#include "boot-loader.h"
-#include "build.h"
-#include "util.h"
-#include "strv.h"
-#include "efivars.h"
-#include "conf-files.h"
-
-static char *tilt_slashes(char *s) {
-        char *p;
-
-        if (!s)
-                return NULL;
-
-        for (p = s; *p; p++)
-                if (*p == '\\')
-                        *p = '/';
-        return s;
-}
-
-static int get_boot_entries(struct boot_info *info) {
-        uint16_t *list = NULL;
-        int i, n;
-        int err = 0;
-
-        n = efi_get_boot_options(&list);
-        if (n < 0)
-                return n;
-
-        for (i = 0; i < n; i++) {
-                struct boot_info_entry *e;
-
-                e = realloc(info->fw_entries, (info->fw_entries_count+1) * sizeof(struct boot_info_entry));
-                if (!e) {
-                        err = -ENOMEM;
-                                break;
-                }
-                info->fw_entries = e;
-
-                e = &info->fw_entries[info->fw_entries_count];
-                memzero(e, sizeof(struct boot_info_entry));
-                e->order = -1;
-
-                err = efi_get_boot_option(list[i], &e->title, &e->part_uuid, &e->path);
-                if (err < 0)
-                        continue;
-
-                if (isempty(e->title)) {
-                        free(e->title);
-                        e->title = NULL;
-                }
-                tilt_slashes(e->path);
-
-                e->id = list[i];
-                info->fw_entries_count++;
-        }
-
-        free(list);
-        return err;
-}
-
-static int find_active_entry(struct boot_info *info) {
-        uint16_t boot_cur;
-        void *buf;
-        size_t l;
-        size_t i;
-        int err;
-
-        err = efi_get_variable(EFI_VENDOR_GLOBAL, "BootCurrent", NULL, &buf, &l);
-        if (err < 0)
-                return err;
-
-        memcpy(&boot_cur, buf, sizeof(uint16_t));
-        for (i = 0; i < info->fw_entries_count; i++) {
-                if (info->fw_entries[i].id != boot_cur)
-                        continue;
-                info->fw_entry_active = i;
-                err = 0;
-                break;
-        }
-        free(buf);
-        return err;
-}
-
-static int get_boot_order(struct boot_info *info) {
-        size_t i, k;
-        int r;
-
-        r = efi_get_boot_order(&info->fw_entries_order);
-        if (r < 0)
-                return r;
-
-        info->fw_entries_order_count = r;
-
-        for (i = 0; i < info->fw_entries_order_count; i++) {
-                for (k = 0; k < info->fw_entries_count; k++) {
-                        if (info->fw_entries[k].id != info->fw_entries_order[i])
-                                continue;
-                        info->fw_entries[k].order = i;
-                        break;
-                }
-        }
-
-        return 0;
-}
-
-static int entry_cmp(const void *a, const void *b) {
-        const struct boot_info_entry *e1 = a;
-        const struct boot_info_entry *e2 = b;
-
-        /* boot order of active entries */
-        if (e1->order > 0 && e2->order > 0)
-                return e1->order - e2->order;
-
-        /* sort active entries before inactive ones */
-        if (e1->order > 0)
-                return 1;
-        if (e2->order > 0)
-                return -1;
-
-        /* order of inactive entries */
-        return e1->id - e2->id;
-}
-
-int boot_info_query(struct boot_info *info) {
-        char str[64];
-        char buf[64];
-        char *loader_active = NULL;
-
-        info->fw_secure_boot = is_efi_secure_boot();
-        info->fw_secure_boot_setup_mode = is_efi_secure_boot_setup_mode();
-
-        efi_get_variable_string(EFI_VENDOR_LOADER, "LoaderInfo", &info->loader);
-
-        get_boot_entries(info);
-        if (info->fw_entries_count > 0) {
-                get_boot_order(info);
-                qsort(info->fw_entries, info->fw_entries_count, sizeof(struct boot_info_entry), entry_cmp);
-                find_active_entry(info);
-        }
-
-        efi_get_variable_string(EFI_VENDOR_LOADER, "LoaderFirmwareType", &info->fw_type);
-        efi_get_variable_string(EFI_VENDOR_LOADER, "LoaderFirmwareInfo", &info->fw_info);
-        efi_get_variable_string(EFI_VENDOR_LOADER, "LoaderImageIdentifier", &info->loader_image_path);
-        tilt_slashes(info->loader_image_path);
-        efi_loader_get_device_part_uuid(&info->loader_part_uuid);
-
-        boot_loader_read_entries(info);
-        efi_get_variable_string(EFI_VENDOR_LOADER, "LoaderEntrySelected", &loader_active);
-        if (loader_active) {
-                boot_loader_find_active_entry(info, loader_active);
-                free(loader_active);
-        }
-
-        snprintf(str, sizeof(str), "LoaderEntryOptions-%s", sd_id128_to_string(info->machine_id, buf));
-        efi_get_variable_string(EFI_VENDOR_LOADER, str, &info->loader_options_added);
-
-        return 0;
-}
diff --git a/src/boot/boot-loader.c b/src/boot/boot-loader.c
deleted file mode 100644
index d44fdb3aef..0000000000
--- a/src/boot/boot-loader.c
+++ /dev/null
@@ -1,132 +0,0 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
-  This file is part of systemd.
-
-  Copyright 2013 Kay Sievers
-
-  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 <stdlib.h>
-#include <stdbool.h>
-#include <unistd.h>
-#include <getopt.h>
-#include <locale.h>
-#include <string.h>
-#include <ctype.h>
-#include <sys/timex.h>
-
-#include "boot.h"
-#include "boot-loader.h"
-#include "build.h"
-#include "util.h"
-#include "strv.h"
-#include "conf-files.h"
-
-static char *loader_fragment_read_title(const char *fragment) {
-        FILE *f;
-        char line[LINE_MAX];
-        char *title = NULL;
-
-        f = fopen(fragment, "re");
-        if (!f)
-                return NULL;
-
-        while (fgets(line, sizeof(line), f) != NULL) {
-                char *s;
-                size_t l;
-
-                l = strlen(line);
-                if (l < 1)
-                        continue;
-                if (line[l-1] == '\n')
-                        line[l-1] = '\0';
-
-                s = line;
-                while (isspace(s[0]))
-                        s++;
-
-                if (s[0] == '#')
-                        continue;
-
-                if (!startswith(s, "title"))
-                        continue;
-
-                s += strlen("title");
-                if (!isspace(s[0]))
-                        continue;
-                while (isspace(s[0]))
-                        s++;
-
-                title = strdup(s);
-                break;
-        }
-
-        fclose(f);
-        return title;
-}
-
-int boot_loader_read_entries(struct boot_info *info) {
-        _cleanup_strv_free_ char **files = NULL;
-        static const char *loader_dir[] = { "/boot/loader/entries", NULL};
-        unsigned int count;
-        unsigned int i;
-        int err;
-
-        err = conf_files_list_strv(&files, ".conf", NULL, loader_dir);
-        if (err < 0)
-                return err;
-
-        count = strv_length(files);
-        info->loader_entries = new0(struct boot_info_entry, count);
-        if (!info->loader_entries)
-                return -ENOMEM;
-
-        for (i = 0; i < count; i++) {
-                info->loader_entries[i].title = loader_fragment_read_title(files[i]);
-                info->loader_entries[i].path = strdup(files[i]);
-                if (!info->loader_entries[i].title || !info->loader_entries[i].path) {
-                        free(info->loader_entries[i].title);
-                        free(info->loader_entries[i].path);
-                        return -ENOMEM;
-                }
-                info->loader_entries_count++;
-        }
-
-        return 0;
-}
-
-int boot_loader_find_active_entry(struct boot_info *info, const char *loader_active) {
-        char *fn;
-        unsigned int i;
-
-        if (!loader_active)
-                return -ENOENT;
-        if (info->loader_entries_count == 0)
-                return -ENOENT;
-
-        if (asprintf(&fn, "/boot/loader/entries/%s.conf", loader_active) < 0)
-                return -ENOMEM;
-
-        for (i = 0; i < info->loader_entries_count; i++) {
-                if (streq(fn, info->loader_entries[i].path)) {
-                        info->loader_entry_active = i;
-                        break;
-                }
-        }
-
-        free(fn);
-        return 0;
-}
diff --git a/src/boot/boot-loader.h b/src/boot/boot-loader.h
deleted file mode 100644
index b3fcdeedad..0000000000
--- a/src/boot/boot-loader.h
+++ /dev/null
@@ -1,27 +0,0 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-#pragma once
-
-/***
-  This file is part of systemd.
-
-  Copyright 2013 Kay Sievers
-
-  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 "boot.h"
-
-int boot_loader_read_entries(struct boot_info *info);
-int boot_loader_find_active_entry(struct boot_info *info, const char *loader_active);
diff --git a/src/boot/boot.h b/src/boot/boot.h
deleted file mode 100644
index bd8dc69d3d..0000000000
--- a/src/boot/boot.h
+++ /dev/null
@@ -1,64 +0,0 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-#pragma once
-
-/***
-  This file is part of systemd.
-
-  Copyright 2013 Kay Sievers
-
-  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 "sd-id128.h"
-
-/*
- * Firmware and boot manager information to be filled in
- * by the platform.
- *
- * This is partly EFI specific, if you add things, keep this
- * as generic as possible to be able to re-use it on other
- * platforms.
- */
-
-struct boot_info_entry {
-        uint16_t id;
-        uint16_t order;
-        char *title;
-        sd_id128_t part_uuid;
-        char *path;
-};
-
-struct boot_info {
-        sd_id128_t machine_id;
-        sd_id128_t boot_id;
-        char *fw_type;
-        char *fw_info;
-        int fw_secure_boot;
-        int fw_secure_boot_setup_mode;
-        struct boot_info_entry *fw_entries;
-        size_t fw_entries_count;
-        uint16_t *fw_entries_order;
-        size_t fw_entries_order_count;
-        ssize_t fw_entry_active;
-        char *loader;
-        char *loader_image_path;
-        sd_id128_t loader_part_uuid;
-        struct boot_info_entry *loader_entries;
-        size_t loader_entries_count;
-        ssize_t loader_entry_active;
-        char *loader_options_added;
-};
-
-int boot_info_query(struct boot_info *info);
diff --git a/src/boot/bootctl.c b/src/boot/bootctl.c
index 51b51c4254..3b6df42910 100644
--- a/src/boot/bootctl.c
+++ b/src/boot/bootctl.c
@@ -3,7 +3,8 @@
 /***
   This file is part of systemd.
 
-  Copyright 2013 Kay Sievers
+  Copyright 2013-2015 Kay Sievers
+  Copyright 2013 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
@@ -19,249 +20,1374 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
-#include <stdlib.h>
-#include <stdbool.h>
-#include <unistd.h>
+#include <stdio.h>
 #include <getopt.h>
-#include <locale.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <assert.h>
+#include <sys/statfs.h>
+#include <sys/stat.h>
+#include <errno.h>
 #include <string.h>
-#include <sys/timex.h>
+#include <unistd.h>
+#include <sys/mman.h>
+#include <dirent.h>
+#include <ctype.h>
+#include <limits.h>
+#include <ftw.h>
+#include <stdbool.h>
+#include <blkid/blkid.h>
 
-#include "boot.h"
+#include "efivars.h"
 #include "build.h"
 #include "util.h"
 #include "utf8.h"
 
-static void help(void) {
-        printf("%s [OPTIONS...] COMMAND ...\n\n"
-               "Query or change firmware and boot manager settings.\n\n"
-               "  -h --help              Show this help\n"
-               "     --version           Show package version\n"
-               "Commands:\n"
-               "  status                 Show current boot settings\n"
-               , program_invocation_short_name);
+static int verify_esp(const char *p, uint32_t *part, uint64_t *pstart, uint64_t *psize, sd_id128_t *uuid) {
+        struct statfs sfs;
+        struct stat st, st2;
+        char *t;
+        blkid_probe b = NULL;
+        int r;
+        const char *v;
+
+        if (statfs(p, &sfs) < 0) {
+                fprintf(stderr, "Failed to check file system type of %s: %m\n", p);
+                return -errno;
+        }
+
+        if (sfs.f_type != 0x4d44) {
+                fprintf(stderr, "File system %s is not a FAT EFI System Partition (ESP) file system.\n", p);
+                return -ENODEV;
+        }
+
+        if (stat(p, &st) < 0) {
+                fprintf(stderr, "Failed to determine block device node of %s: %m\n", p);
+                return -errno;
+        }
+
+        if (major(st.st_dev) == 0) {
+                fprintf(stderr, "Block device node of %p is invalid.\n", p);
+                return -ENODEV;
+        }
+
+        r = asprintf(&t, "%s/..", p);
+        if (r < 0) {
+                fprintf(stderr, "Out of memory.\n");
+                return -ENOMEM;
+        }
+
+        r = stat(t, &st2);
+        free(t);
+        if (r < 0) {
+                fprintf(stderr, "Failed to determine block device node of parent of %s: %m\n", p);
+                return -errno;
+        }
+
+        if (st.st_dev == st2.st_dev) {
+                fprintf(stderr, "Directory %s is not the root of the EFI System Partition (ESP) file system.\n", p);
+                return -ENODEV;
+        }
+
+        r = asprintf(&t, "/dev/block/%u:%u", major(st.st_dev), minor(st.st_dev));
+        if (r < 0) {
+                fprintf(stderr, "Out of memory.\n");
+                return -ENOMEM;
+        }
+
+        errno = 0;
+        b = blkid_new_probe_from_filename(t);
+        free(t);
+        if (!b) {
+                if (errno != 0) {
+                        fprintf(stderr, "Failed to open file system %s: %m\n", p);
+                        return -errno;
+                }
+
+                fprintf(stderr, "Out of memory.\n");
+                return -ENOMEM;
+        }
+
+        blkid_probe_enable_superblocks(b, 1);
+        blkid_probe_set_superblocks_flags(b, BLKID_SUBLKS_TYPE);
+        blkid_probe_enable_partitions(b, 1);
+        blkid_probe_set_partitions_flags(b, BLKID_PARTS_ENTRY_DETAILS);
+
+        errno = 0;
+        r = blkid_do_safeprobe(b);
+        if (r == -2) {
+                fprintf(stderr, "File system %s is ambigious.\n", p);
+                r = -ENODEV;
+                goto fail;
+        } else if (r == 1) {
+                fprintf(stderr, "File system %s does not contain a label.\n", p);
+                r = -ENODEV;
+                goto fail;
+        } else if (r != 0) {
+                r = errno ? -errno : -EIO;
+                fprintf(stderr, "Failed to probe file system %s: %s\n", p, strerror(-r));
+                goto fail;
+        }
+
+        errno = 0;
+        r = blkid_probe_lookup_value(b, "TYPE", &v, NULL);
+        if (r != 0) {
+                r = errno ? -errno : -EIO;
+                fprintf(stderr, "Failed to probe file system type %s: %s\n", p, strerror(-r));
+                goto fail;
+        }
+
+        if (strcmp(v, "vfat") != 0) {
+                fprintf(stderr, "File system %s is not a FAT EFI System Partition (ESP) file system after all.\n", p);
+                r = -ENODEV;
+                goto fail;
+        }
+
+        errno = 0;
+        r = blkid_probe_lookup_value(b, "PART_ENTRY_SCHEME", &v, NULL);
+        if (r != 0) {
+                r = errno ? -errno : -EIO;
+                fprintf(stderr, "Failed to probe partition scheme %s: %s\n", p, strerror(-r));
+                goto fail;
+        }
+
+        if (strcmp(v, "gpt") != 0) {
+                fprintf(stderr, "File system %s is not on a GPT partition table.\n", p);
+                r = -ENODEV;
+                goto fail;
+        }
+
+        errno = 0;
+        r = blkid_probe_lookup_value(b, "PART_ENTRY_TYPE", &v, NULL);
+        if (r != 0) {
+                r = errno ? -errno : -EIO;
+                fprintf(stderr, "Failed to probe partition type UUID %s: %s\n", p, strerror(-r));
+                goto fail;
+        }
+
+        if (strcmp(v, "c12a7328-f81f-11d2-ba4b-00a0c93ec93b") != 0) {
+                r = -ENODEV;
+                fprintf(stderr, "File system %s is not an EFI System Partition (ESP).\n", p);
+                goto fail;
+        }
+
+        errno = 0;
+        r = blkid_probe_lookup_value(b, "PART_ENTRY_UUID", &v, NULL);
+        if (r != 0) {
+                r = errno ? -errno : -EIO;
+                fprintf(stderr, "Failed to probe partition entry UUID %s: %s\n", p, strerror(-r));
+                goto fail;
+        }
+        sd_id128_from_string(v, uuid);
+
+        errno = 0;
+        r = blkid_probe_lookup_value(b, "PART_ENTRY_NUMBER", &v, NULL);
+        if (r != 0) {
+                r = errno ? -errno : -EIO;
+                fprintf(stderr, "Failed to probe partition number %s: %s\n", p, strerror(-r));
+                goto fail;
+        }
+        *part = strtoul(v, NULL, 10);
+
+        errno = 0;
+        r = blkid_probe_lookup_value(b, "PART_ENTRY_OFFSET", &v, NULL);
+        if (r != 0) {
+                r = errno ? -errno : -EIO;
+                fprintf(stderr, "Failed to probe partition offset %s: %s\n", p, strerror(-r));
+                goto fail;
+        }
+        *pstart = strtoul(v, NULL, 10);
+
+        errno = 0;
+        r = blkid_probe_lookup_value(b, "PART_ENTRY_SIZE", &v, NULL);
+        if (r != 0) {
+                r = errno ? -errno : -EIO;
+                fprintf(stderr, "Failed to probe partition size %s: %s\n", p, strerror(-r));
+                goto fail;
+        }
+        *psize = strtoul(v, NULL, 10);
+
+        blkid_free_probe(b);
+        return 0;
+fail:
+        if (b)
+                blkid_free_probe(b);
+        return r;
 }
 
-static int parse_argv(int argc, char *argv[]) {
-        enum {
-                ARG_VERSION = 0x100,
-        };
+/* search for "#### LoaderInfo: sd-boot 218 ####" string inside the binary */
+static int get_file_version(FILE *f, char **v) {
+        struct stat st;
+        char *buf;
+        const char *s, *e;
+        char *x = NULL;
+        int r = 0;
 
-        static const struct option options[] = {
-                { "help",        no_argument, NULL, 'h'          },
-                { "version",     no_argument, NULL, ARG_VERSION  },
-                {}
-        };
+        assert(f);
+        assert(v);
 
-        int c;
+        if (fstat(fileno(f), &st) < 0)
+                return -errno;
 
-        assert(argc >= 0);
-        assert(argv);
+        if (st.st_size < 27)
+                return 0;
 
-        while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
+        buf = mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, fileno(f), 0);
+        if (buf == MAP_FAILED)
+                return -errno;
 
-                switch (c) {
+        s = memmem(buf, st.st_size - 8, "#### LoaderInfo: ", 17);
+        if (!s)
+                goto finish;
+        s += 17;
 
-                case 'h':
-                        help();
-                        return 0;
+        e = memmem(s, st.st_size - (s - buf), " ####", 5);
+        if (!e || e - s < 3) {
+                fprintf(stderr, "Malformed version string.\n");
+                r = -EINVAL;
+                goto finish;
+        }
 
-                case ARG_VERSION:
-                        puts(PACKAGE_STRING);
-                        puts(SYSTEMD_FEATURES);
-                        return 0;
+        x = strndup(s, e - s);
+        if (!x) {
+                fprintf(stderr, "Out of memory.\n");
+                r = -ENOMEM;
+                goto finish;
+        }
+        r = 1;
 
-                case '?':
-                        return -EINVAL;
+finish:
+        munmap(buf, st.st_size);
+        *v = x;
+        return r;
+}
 
-                default:
-                        assert_not_reached("Unhandled option");
+static int enumerate_binaries(const char *esp_path, const char *path, const char *prefix) {
+        struct dirent *de;
+        char *p = NULL, *q = NULL;
+        DIR *d = NULL;
+        int r = 0, c = 0;
+
+        if (asprintf(&p, "%s/%s", esp_path, path) < 0) {
+                fprintf(stderr, "Out of memory.\n");
+                r = -ENOMEM;
+                goto finish;
+        }
+
+        d = opendir(p);
+        if (!d) {
+                if (errno == ENOENT) {
+                        r = 0;
+                        goto finish;
                 }
 
-        return 1;
+                fprintf(stderr, "Failed to read %s: %m\n", p);
+                r = -errno;
+                goto finish;
+        }
+
+        while ((de = readdir(d))) {
+                char *v;
+                size_t n;
+                FILE *f;
+
+                if (de->d_name[0] == '.')
+                        continue;
+
+                n = strlen(de->d_name);
+                if (n < 4 || strcasecmp(de->d_name + n - 4, ".efi") != 0)
+                        continue;
+
+                if (prefix && strncasecmp(de->d_name, prefix, strlen(prefix)) != 0)
+                        continue;
+
+                free(q);
+                q = NULL;
+                if (asprintf(&q, "%s/%s/%s", esp_path, path, de->d_name) < 0) {
+                        fprintf(stderr, "Out of memory.\n");
+                        r = -ENOMEM;
+                        goto finish;
+                }
+
+                f = fopen(q, "re");
+                if (!f) {
+                        fprintf(stderr, "Failed to open %s for reading: %m\n", q);
+                        r = -errno;
+                        goto finish;
+                }
+
+                r = get_file_version(f, &v);
+                fclose(f);
+
+                if (r < 0)
+                        goto finish;
+
+                if (r > 0)
+                        printf("         File: └─/%s/%s (%s)\n", path, de->d_name, v);
+                else
+                        printf("         File: └─/%s/%s\n", path, de->d_name);
+
+                c++;
+                free(v);
+        }
+
+        r = c;
+
+finish:
+        if (d)
+                closedir(d);
+
+        free(p);
+        free(q);
+        return r;
 }
 
-static int boot_info_new(struct boot_info **info) {
-        struct boot_info *in;
-        int err;
+static int status_binaries(const char *esp_path, sd_id128_t partition) {
+        int r;
+
+        printf("Boot Loader Binaries:\n");
+
+        printf("          ESP: /dev/disk/by-partuuid/%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x\n", SD_ID128_FORMAT_VAL(partition));
+
+        r = enumerate_binaries(esp_path, "EFI/systemd", NULL);
+        if (r == 0)
+                fprintf(stderr, "sd-boot not installed in ESP.\n");
+        else if (r < 0)
+                return r;
+
+        r = enumerate_binaries(esp_path, "EFI/Boot", "boot");
+        if (r == 0)
+                fprintf(stderr, "No default/fallback boot loader installed in ESP.\n");
+        else if (r < 0)
+                return r;
+
+        printf("\n");
+        return 0;
+}
+
+static int print_efi_option(uint16_t id, bool in_order) {
+        char *title = NULL;
+        char *path = NULL;
+        sd_id128_t partition;
+        bool active;
+        int r = 0;
+
+        r = efi_get_boot_option(id, &title, &partition, &path, &active);
+        if (r < 0)
+                goto finish;
 
-        in = new0(struct boot_info, 1);
-        if (!in)
+        /* print only configured entries with partition information */
+        if (!path || sd_id128_equal(partition, SD_ID128_NULL))
+                return 0;
+
+        efi_tilt_backslashes(path);
+
+        printf("        Title: %s\n", strna(title));
+        printf("           ID: 0x%04X\n", id);
+        printf("       Status: %sactive%s\n", active ? "" : "in", in_order ? ", boot-order" : "");
+        printf("    Partition: /dev/disk/by-partuuid/%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x\n", SD_ID128_FORMAT_VAL(partition));
+        printf("         File: └─%s\n", path);
+        printf("\n");
+
+finish:
+        free(title);
+        free(path);
+        return r;
+}
+
+static int status_variables(void) {
+        int n_options, n_order;
+        uint16_t *options = NULL, *order = NULL;
+        int r, i;
+
+        if (!is_efi_boot()) {
+                fprintf(stderr, "Not booted with EFI, not showing EFI variables.\n");
+                return 0;
+        }
+
+        n_options = efi_get_boot_options(&options);
+        if (n_options < 0) {
+                if (n_options == -ENOENT)
+                        fprintf(stderr, "Failed to access EFI variables, "
+                                "efivarfs needs to be available at /sys/firmware/efi/efivars/.\n");
+                else
+                        fprintf(stderr, "Failed to read EFI boot entries: %s\n", strerror(-n_options));
+                r = n_options;
+                goto finish;
+        }
+
+        printf("Boot Loader Entries in EFI Variables:\n");
+        n_order = efi_get_boot_order(&order);
+        if (n_order == -ENOENT) {
+                n_order = 0;
+        } else if (n_order < 0) {
+                fprintf(stderr, "Failed to read EFI boot order.\n");
+                r = n_order;
+                goto finish;
+        }
+
+        /* print entries in BootOrder first */
+        for (i = 0; i < n_order; i++)
+                print_efi_option(order[i], true);
+
+        /* print remaining entries */
+        for (i = 0; i < n_options; i++) {
+                int j;
+                bool found = false;
+
+                for (j = 0; j < n_order; j++)
+                        if (options[i] == order[j]) {
+                                found = true;
+                                break;
+                        }
+
+                if (found)
+                        continue;
+
+                print_efi_option(options[i], false);
+        }
+
+        r = 0;
+finish:
+        free(options);
+        free(order);
+
+        return r;
+}
+
+static int compare_product(const char *a, const char *b) {
+        size_t x, y;
+
+        assert(a);
+        assert(b);
+
+        x = strcspn(a, " ");
+        y = strcspn(b, " ");
+        if (x != y)
+                return x < y ? -1 : x > y ? 1 : 0;
+
+        return strncmp(a, b, x);
+}
+
+static int compare_version(const char *a, const char *b) {
+        assert(a);
+        assert(b);
+
+        a += strcspn(a, " ");
+        a += strspn(a, " ");
+        b += strcspn(b, " ");
+        b += strspn(b, " ");
+
+        return strverscmp(a, b);
+}
+
+static int version_check(FILE *f, const char *from, const char *to) {
+        FILE *g = NULL;
+        char *a = NULL, *b = NULL;
+        int r;
+
+        assert(f);
+        assert(from);
+        assert(to);
+
+        r = get_file_version(f, &a);
+        if (r < 0)
+                goto finish;
+        if (r == 0) {
+                r = -EINVAL;
+                fprintf(stderr, "Source file %s does not carry version information!\n", from);
+                goto finish;
+        }
+
+        g = fopen(to, "re");
+        if (!g) {
+                if (errno == ENOENT) {
+                        r = 0;
+                        goto finish;
+                }
+
+                r = -errno;
+                fprintf(stderr, "Failed to open %s for reading: %m\n", to);
+                goto finish;
+        }
+
+        r = get_file_version(g, &b);
+        if (r < 0)
+                goto finish;
+        if (r == 0 || compare_product(a, b) != 0) {
+                r = -EEXIST;
+                fprintf(stderr, "Skipping %s, since it's owned by another boot loader.\n", to);
+                goto finish;
+        }
+
+        if (compare_version(a, b) < 0) {
+                r = -EEXIST;
+                fprintf(stderr, "Skipping %s, since it's a newer boot loader version already.\n", to);
+                goto finish;
+        }
+
+        r = 0;
+
+finish:
+        free(a);
+        free(b);
+        if (g)
+                fclose(g);
+        return r;
+}
+
+static int copy_file(const char *from, const char *to, bool force) {
+        FILE *f = NULL, *g = NULL;
+        char *p = NULL;
+        int r;
+        struct timespec t[2];
+        struct stat st;
+
+        assert(from);
+        assert(to);
+
+        f = fopen(from, "re");
+        if (!f) {
+                fprintf(stderr, "Failed to open %s for reading: %m\n", from);
+                return -errno;
+        }
+
+        if (!force) {
+                /* If this is an update, then let's compare versions first */
+                r = version_check(f, from, to);
+                if (r < 0)
+                        goto finish;
+        }
+
+        if (asprintf(&p, "%s~", to) < 0) {
+                fprintf(stderr, "Out of memory.\n");
+                r = -ENOMEM;
+                goto finish;
+        }
+
+        g = fopen(p, "wxe");
+        if (!g) {
+                /* Directory doesn't exist yet? Then let's skip this... */
+                if (!force && errno == ENOENT) {
+                        r = 0;
+                        goto finish;
+                }
+
+                fprintf(stderr, "Failed to open %s for writing: %m\n", to);
+                r = -errno;
+                goto finish;
+        }
+
+        rewind(f);
+        do {
+                size_t k;
+                uint8_t buf[32*1024];
+
+                k = fread(buf, 1, sizeof(buf), f);
+                if (ferror(f)) {
+                        fprintf(stderr, "Failed to read %s: %m\n", from);
+                        r = -errno;
+                        goto finish;
+                }
+                if (k == 0)
+                        break;
+
+                fwrite(buf, 1, k, g);
+                if (ferror(g)) {
+                        fprintf(stderr, "Failed to write %s: %m\n", to);
+                        r = -errno;
+                        goto finish;
+                }
+        } while (!feof(f));
+
+        fflush(g);
+        if (ferror(g)) {
+                fprintf(stderr, "Failed to write %s: %m\n", to);
+                r = -errno;
+                goto finish;
+        }
+
+        r = fstat(fileno(f), &st);
+        if (r < 0) {
+                fprintf(stderr, "Failed to get file timestamps of %s: %m", from);
+                r = -errno;
+                goto finish;
+        }
+
+        t[0] = st.st_atim;
+        t[1] = st.st_mtim;
+
+        r = futimens(fileno(g), t);
+        if (r < 0) {
+                fprintf(stderr, "Failed to change file timestamps for %s: %m", p);
+                r = -errno;
+                goto finish;
+        }
+
+        if (rename(p, to) < 0) {
+                fprintf(stderr, "Failed to rename %s to %s: %m\n", p, to);
+                r = -errno;
+                goto finish;
+        }
+
+        fprintf(stderr, "Copied %s to %s.\n", from, to);
+
+        free(p);
+        p = NULL;
+        r = 0;
+
+finish:
+        if (f)
+                fclose(f);
+        if (g)
+                fclose(g);
+        if (p) {
+                unlink(p);
+                free(p);
+        }
+        return r;
+}
+
+static char* strupper(char *s) {
+        char *p;
+
+        for (p = s; *p; p++)
+                *p = toupper(*p);
+
+        return s;
+}
+
+static int mkdir_one(const char *prefix, const char *suffix) {
+        char *p;
+
+        if (asprintf(&p, "%s/%s", prefix, suffix) < 0) {
+                fprintf(stderr, "Out of memory.\n");
                 return -ENOMEM;
+        }
 
-        err = sd_id128_get_machine(&in->machine_id);
-        if (err < 0)
-                goto err;
+        if (mkdir(p, 0700) < 0) {
+                if (errno != EEXIST) {
+                        fprintf(stderr, "Failed to create %s: %m\n", p);
+                        free(p);
+                        return -errno;
+                }
+        } else
+                fprintf(stderr, "Created %s.\n", p);
 
-        err = sd_id128_get_boot(&in->boot_id);
-        if (err < 0)
-                goto err;
+        free(p);
+        return 0;
+}
+
+static int create_dirs(const char *esp_path) {
+        int r;
+
+        r = mkdir_one(esp_path, "EFI");
+        if (r < 0)
+                return r;
+
+        r = mkdir_one(esp_path, "EFI/systemd");
+        if (r < 0)
+                return r;
+
+        r = mkdir_one(esp_path, "EFI/Boot");
+        if (r < 0)
+                return r;
 
-        in->fw_entry_active = -1;
-        in->loader_entry_active = -1;
+        r = mkdir_one(esp_path, "loader");
+        if (r < 0)
+                return r;
+
+        r = mkdir_one(esp_path, "loader/entries");
+        if (r < 0)
+                return r;
 
-        *info = in;
         return 0;
-err:
-        free(in);
-        return err;
 }
 
-static void boot_info_entries_free(struct boot_info_entry *entries, size_t n) {
-        size_t i;
+static int copy_one_file(const char *esp_path, const char *name, bool force) {
+        _cleanup_free_ char *p = NULL;
+        _cleanup_free_ char *q = NULL;
+        _cleanup_free_ char *v = NULL;
+        int r;
+
+        if (asprintf(&p, SD_BOOTLIBDIR "/%s", name) < 0) {
+                fprintf(stderr, "Out of memory.\n");
+                return -ENOMEM;
+        }
 
-        for (i = 0; i < n; i++) {
-                free(entries[i].title);
-                free(entries[i].path);
+        if (asprintf(&q, "%s/EFI/systemd/%s", esp_path, name) < 0) {
+                fprintf(stderr, "Out of memory.\n");
+                return -ENOMEM;
         }
-        free(entries);
+
+        r = copy_file(p, q, force);
+
+        if (startswith(name, "sd-boot")) {
+                int k;
+
+                /* Create the EFI default boot loader name (specified for removable devices) */
+                if (asprintf(&v, "%s/EFI/Boot/BOOT%s", esp_path, name + strlen("sd-boot")) < 0) {
+                        fprintf(stderr, "Out of memory.\n");
+                        return -ENOMEM;
+                }
+                strupper(strrchr(v, '/') + 1);
+
+                k = copy_file(p, v, force);
+                if (k < 0 && r == 0)
+                        return k;
+        }
+
+        return r;
 }
 
-static void boot_info_free(struct boot_info *info) {
-        free(info->fw_type);
-        free(info->fw_info);
-        boot_info_entries_free(info->fw_entries, info->fw_entries_count);
-        free(info->fw_entries_order);
-        free(info->loader);
-        free(info->loader_image_path);
-        free(info->loader_options_added);
-        boot_info_entries_free(info->loader_entries, info->loader_entries_count);
-        free(info);
+static int install_binaries(const char *esp_path, bool force) {
+        struct dirent *de;
+        DIR *d;
+        int r = 0;
+
+        if (force) {
+                /* Don't create any of these directories when we are
+                 * just updating. When we update we'll drop-in our
+                 * files (unless there are newer ones already), but we
+                 * won't create the directories for them in the first
+                 * place. */
+                r = create_dirs(esp_path);
+                if (r < 0)
+                        return r;
+        }
+
+        d = opendir(SD_BOOTLIBDIR);
+        if (!d) {
+                fprintf(stderr, "Failed to open "SD_BOOTLIBDIR": %m\n");
+                return -errno;
+        }
+
+        while ((de = readdir(d))) {
+                size_t n;
+                int k;
+
+                if (de->d_name[0] == '.')
+                        continue;
+
+                n = strlen(de->d_name);
+                if (n < 4 || strcmp(de->d_name + n - 4, ".efi") != 0)
+                        continue;
+
+                k = copy_one_file(esp_path, de->d_name, force);
+                if (k < 0 && r == 0)
+                        r = k;
+        }
+
+        closedir(d);
+        return r;
 }
 
-static int show_status(char **args, unsigned n) {
-        char buf[64];
-        struct boot_info *info;
+static bool same_entry(uint16_t id, const sd_id128_t uuid, const char *path) {
+        char *opath = NULL;
+        sd_id128_t ouuid;
         int err;
+        bool same = false;
 
-        err = boot_info_new(&info);
+        err = efi_get_boot_option(id, NULL, &ouuid, &opath, NULL);
         if (err < 0)
+                return false;
+        if (!sd_id128_equal(uuid, ouuid))
+                goto finish;
+
+        if (!streq_ptr(path, opath))
+                goto finish;
+
+        same = true;
+
+finish:
+        return same;
+}
+
+static int find_slot(sd_id128_t uuid, const char *path, uint16_t *id) {
+        uint16_t *options = NULL;
+        int n_options;
+        int i;
+        uint16_t new_id = 0;
+        bool existing = false;
+
+        n_options = efi_get_boot_options(&options);
+        if (n_options < 0)
+                return n_options;
+
+        /* find already existing sd-boot entry */
+        for (i = 0; i < n_options; i++)
+                if (same_entry(options[i], uuid, path)) {
+                        new_id = options[i];
+                        existing = true;
+                        goto finish;
+                }
+
+        /* find free slot in the sorted BootXXXX variable list */
+        for (i = 0; i < n_options; i++)
+                if (i != options[i]) {
+                        new_id = i;
+                        goto finish;
+                }
+
+        /* use the next one */
+        if (i == 0xffff)
+                return -ENOSPC;
+        new_id = i;
+
+finish:
+        *id = new_id;
+        free(options);
+        return existing;
+}
+
+static int insert_into_order(uint16_t slot, bool first) {
+        uint16_t *order = NULL;
+        uint16_t *new_order;
+        int n_order;
+        int i;
+        int err = 0;
+
+        n_order = efi_get_boot_order(&order);
+        if (n_order <= 0) {
+                /* no entry, add us */
+                err = efi_set_boot_order(&slot, 1);
+                goto finish;
+        }
+
+        /* are we the first and only one? */
+        if (n_order == 1 && order[0] == slot)
+                goto finish;
+
+        /* are we already in the boot order? */
+        for (i = 0; i < n_order; i++) {
+                if (order[i] != slot)
+                        continue;
+
+                /* we do not require to be the first one, all is fine */
+                if (!first)
+                        goto finish;
+
+                /* move us to the first slot */
+                memmove(&order[1], order, i * sizeof(uint16_t));
+                order[0] = slot;
+                efi_set_boot_order(order, n_order);
+                goto finish;
+        }
+
+        /* extend array */
+        new_order = realloc(order, (n_order+1) * sizeof(uint16_t));
+        if (!new_order) {
+                err = -ENOMEM;
+                goto finish;
+        }
+        order = new_order;
+
+        /* add us to the top or end of the list */
+        if (first) {
+                memmove(&order[1], order, n_order * sizeof(uint16_t));
+                order[0] = slot;
+        } else
+                order[n_order] = slot;
+
+        efi_set_boot_order(order, n_order+1);
+
+finish:
+        free(order);
+        return err;
+}
+
+static int remove_from_order(uint16_t slot) {
+        uint16_t *order = NULL;
+        int n_order;
+        int i;
+        int err = 0;
+
+        n_order = efi_get_boot_order(&order);
+        if (n_order < 0)
+                return n_order;
+        if (n_order == 0)
+                return 0;
+
+        for (i = 0; i < n_order; i++) {
+                if (order[i] != slot)
+                        continue;
+
+                if (i+1 < n_order)
+                        memmove(&order[i], &order[i+1], (n_order - i) * sizeof(uint16_t));
+                efi_set_boot_order(order, n_order-1);
+                break;
+        }
+
+        free(order);
+        return err;
+}
+
+static int install_variables(const char *esp_path,
+                             uint32_t part, uint64_t pstart, uint64_t psize,
+                             sd_id128_t uuid, const char *path,
+                             bool first) {
+        char *p = NULL;
+        uint16_t *options = NULL;
+        uint16_t slot;
+        int r;
+
+        if (!is_efi_boot()) {
+                fprintf(stderr, "Not booted with EFI, skipping EFI variable setup.\n");
+                return 0;
+        }
+
+        if (asprintf(&p, "%s%s", esp_path, path) < 0) {
+                fprintf(stderr, "Out of memory.\n");
                 return -ENOMEM;
+        }
 
-        err = boot_info_query(info);
-
-        printf("System:\n");
-        printf("   Machine ID: %s\n", sd_id128_to_string(info->machine_id, buf));
-        printf("      Boot ID: %s\n", sd_id128_to_string(info->boot_id, buf));
-        if (info->fw_type)
-                printf("     Firmware: %s (%s)\n", info->fw_type, strna(info->fw_info));
-        if (info->fw_secure_boot >= 0)
-                printf("  Secure Boot: %s\n", info->fw_secure_boot ? "enabled" : "disabled");
-        if (info->fw_secure_boot_setup_mode >= 0)
-                printf("   Setup Mode: %s\n", info->fw_secure_boot_setup_mode ? "setup" : "user");
-        printf("\n");
+        if (access(p, F_OK) < 0) {
+                if (errno == ENOENT)
+                        r = 0;
+                else
+                        r = -errno;
+                goto finish;
+        }
 
-        if (info->fw_entry_active >= 0) {
-                printf("Selected Firmware Entry:\n");
-                printf("        Title: %s\n", strna(info->fw_entries[info->fw_entry_active].title));
-                if (!sd_id128_equal(info->fw_entries[info->fw_entry_active].part_uuid, SD_ID128_NULL))
-                        printf("    Partition: /dev/disk/by-partuuid/%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x\n",
-                               SD_ID128_FORMAT_VAL(info->fw_entries[info->fw_entry_active].part_uuid));
+        r = find_slot(uuid, path, &slot);
+        if (r < 0) {
+                if (r == -ENOENT)
+                        fprintf(stderr, "Failed to access EFI variables. Is the \"efivarfs\" filesystem mounted?\n");
                 else
-                        printf("    Partition: n/a\n");
-                if (info->fw_entries[info->fw_entry_active].path)
-                        printf("         File: %s%s\n", draw_special_char(DRAW_TREE_RIGHT), info->fw_entries[info->fw_entry_active].path);
+                        fprintf(stderr, "Failed to determine current boot order: %s\n", strerror(-r));
+                goto finish;
         }
-        printf("\n");
 
-        if (info->loader) {
-                printf("Boot Loader:\n");
-                printf("      Product: %s\n", info->loader);
-                if (!sd_id128_equal(info->loader_part_uuid, SD_ID128_NULL))
-                        printf("    Partition: /dev/disk/by-partuuid/%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x\n",
-                               SD_ID128_FORMAT_VAL(info->loader_part_uuid));
-                        else
-                                printf("    Partition: n/a\n");
-                printf("         File: %s%s\n", draw_special_char(DRAW_TREE_RIGHT), strna(info->loader_image_path));
-                printf("\n");
+        if (first || r == false) {
+                r = efi_add_boot_option(slot, "Linux Boot Manager",
+                                        part, pstart, psize,
+                                        uuid, path);
+                if (r < 0) {
+                        fprintf(stderr, "Failed to create EFI Boot variable entry: %s\n", strerror(-r));
+                        goto finish;
+                }
+                fprintf(stderr, "Created EFI boot entry \"Linux Boot Manager\".\n");
+        }
+
+        insert_into_order(slot, first);
+
+finish:
+        free(p);
+        free(options);
+        return r;
+}
+
+static int remove_boot_efi(const char *esp_path) {
+        struct dirent *de;
+        char *p = NULL, *q = NULL;
+        DIR *d = NULL;
+        int r = 0, c = 0;
+
+        if (asprintf(&p, "%s/EFI/Boot", esp_path) < 0) {
+                fprintf(stderr, "Out of memory.\n");
+                return -ENOMEM;
+        }
+
+        d = opendir(p);
+        if (!d) {
+                if (errno == ENOENT) {
+                        r = 0;
+                        goto finish;
+                }
+
+                fprintf(stderr, "Failed to read %s: %m\n", p);
+                r = -errno;
+                goto finish;
+        }
+
+        while ((de = readdir(d))) {
+                char *v;
+                size_t n;
+                FILE *f;
+
+                if (de->d_name[0] == '.')
+                        continue;
+
+                n = strlen(de->d_name);
+                if (n < 4 || strcasecmp(de->d_name + n - 4, ".EFI") != 0)
+                        continue;
+
+                if (strncasecmp(de->d_name, "Boot", 4) != 0)
+                        continue;
+
+                free(q);
+                q = NULL;
+                if (asprintf(&q, "%s/%s", p, de->d_name) < 0) {
+                        fprintf(stderr, "Out of memory.\n");
+                        r = -ENOMEM;
+                        goto finish;
+                }
+
+                f = fopen(q, "re");
+                if (!f) {
+                        fprintf(stderr, "Failed to open %s for reading: %m\n", q);
+                        r = -errno;
+                        goto finish;
+                }
+
+                r = get_file_version(f, &v);
+                fclose(f);
+
+                if (r < 0)
+                        goto finish;
+
+                if (r > 0 && strncmp(v, "sd-boot ", 10) == 0) {
+
+                        r = unlink(q);
+                        if (r < 0) {
+                                fprintf(stderr, "Failed to remove %s: %m\n", q);
+                                r = -errno;
+                                free(v);
+                                goto finish;
+                        } else
+                                fprintf(stderr, "Removed %s.\n", q);
+                }
+
+                c++;
+                free(v);
+        }
+
+        r = c;
+
+finish:
+        if (d)
+                closedir(d);
+        free(p);
+        free(q);
+
+        return r;
+}
+
+static int rmdir_one(const char *prefix, const char *suffix) {
+        char *p;
 
-                if (info->loader_entry_active >= 0) {
-                        printf("Selected Boot Loader Entry:\n");
-                        printf("        Title: %s\n", strna(info->loader_entries[info->loader_entry_active].title));
-                        printf("         File: %s\n", info->loader_entries[info->loader_entry_active].path);
-                        if (info->loader_options_added)
-                                printf("      Options: %s\n", info->loader_options_added);
+        if (asprintf(&p, "%s/%s", prefix, suffix) < 0) {
+                fprintf(stderr, "Out of memory.\n");
+                return -ENOMEM;
+        }
+
+        if (rmdir(p) < 0) {
+                if (errno != ENOENT && errno != ENOTEMPTY) {
+                        fprintf(stderr, "Failed to remove %s: %m\n", p);
+                        free(p);
+                        return -errno;
                 }
         } else
-                printf("No suitable data is provided by the boot manager. See:\n"
-                       "  http://www.freedesktop.org/wiki/Software/systemd/BootLoaderInterface\n"
-                       "  http://www.freedesktop.org/wiki/Specifications/BootLoaderSpec\n"
-                       "for details.\n");
-        printf("\n");
+                fprintf(stderr, "Removed %s.\n", p);
 
-        boot_info_free(info);
-        return err;
+        free(p);
+        return 0;
 }
 
-static int bootctl_main(int argc, char *argv[]) {
-        static const struct {
-                const char* verb;
-                const enum {
-                        MORE,
-                        LESS,
-                        EQUAL
-                } argc_cmp;
-                const int argc;
-                int (* const dispatch)(char **args, unsigned n);
-        } verbs[] = {
-                { "status",                LESS,   1, show_status      },
+
+static int remove_binaries(const char *esp_path) {
+        char *p;
+        int r, q;
+
+        if (asprintf(&p, "%s/EFI/sd-boot", esp_path) < 0) {
+                fprintf(stderr, "Out of memory.\n");
+                return -ENOMEM;
+        }
+
+        r = rm_rf(p, false, false, false);
+        free(p);
+
+        q = remove_boot_efi(esp_path);
+        if (q < 0 && r == 0)
+                r = q;
+
+        q = rmdir_one(esp_path, "loader/entries");
+        if (q < 0 && r == 0)
+                r = q;
+
+        q = rmdir_one(esp_path, "loader");
+        if (q < 0 && r == 0)
+                r = q;
+
+        q = rmdir_one(esp_path, "EFI/Boot");
+        if (q < 0 && r == 0)
+                r = q;
+
+        q = rmdir_one(esp_path, "EFI/sd-boot");
+        if (q < 0 && r == 0)
+                r = q;
+
+        q = rmdir_one(esp_path, "EFI");
+        if (q < 0 && r == 0)
+                r = q;
+
+        return r;
+}
+
+static int remove_variables(sd_id128_t uuid, const char *path, bool in_order) {
+        uint16_t slot;
+        int r;
+
+        if (!is_efi_boot())
+                return 0;
+
+        r = find_slot(uuid, path, &slot);
+        if (r != 1)
+                return 0;
+
+        r = efi_remove_boot_option(slot);
+        if (r < 0)
+                return r;
+
+        if (in_order)
+                remove_from_order(slot);
+
+        return 0;
+}
+
+static int install_loader_config(const char *esp_path) {
+        char *p = NULL;
+        char line[64];
+        char *machine = NULL;
+        FILE *f;
+
+        f = fopen("/etc/machine-id", "re");
+        if (!f)
+                return -errno;
+
+        if (fgets(line, sizeof(line), f) != NULL) {
+                char *s;
+
+                s = strchr(line, '\n');
+                if (s)
+                        s[0] = '\0';
+                if (strlen(line) == 32)
+                        machine = line;
+        }
+
+        fclose(f);
+
+        if (!machine)
+                return -ESRCH;
+
+        if (asprintf(&p, "%s/%s", esp_path, "loader/loader.conf") < 0) {
+                fprintf(stderr, "Out of memory.\n");
+                return -ENOMEM;
+        }
+
+        f = fopen(p, "wxe");
+        if (f) {
+                fprintf(f, "#timeout 3\n");
+                fprintf(f, "default %s-*\n", machine);
+                fclose(f);
+        }
+
+        free(p);
+        return 0;
+}
+
+static int help(void) {
+        printf("%s [COMMAND] [OPTIONS...]\n"
+               "\n"
+               "Install, update or remove the sdboot EFI boot manager.\n\n"
+               "  -h --help          Show this help\n"
+               "     --version       Print version\n"
+               "     --path=PATH     Path to the EFI System Partition (ESP)\n"
+               "     --no-variables  Don't touch EFI variables\n"
+               "\n"
+               "Comands:\n"
+               "     status          Show status of installed sd-boot and EFI variables\n"
+               "     install         Install sd-boot to the ESP and EFI variables\n"
+               "     update          Update sd-boot in the ESP and EFI variables\n"
+               "     remove          Remove sd-boot from the ESP and EFI variables\n",
+               program_invocation_short_name);
+
+        return 0;
+}
+
+static const char *arg_path = NULL;
+static bool arg_touch_variables = true;
+
+static int parse_argv(int argc, char *argv[]) {
+        enum {
+                ARG_PATH = 0x100,
+                ARG_VERSION,
+                ARG_NO_VARIABLES,
         };
 
-        int left;
-        unsigned i;
+        static const struct option options[] = {
+                { "help",         no_argument,       NULL, 'h'              },
+                { "version",      no_argument,       NULL, ARG_VERSION      },
+                { "path",         required_argument, NULL, ARG_PATH         },
+                { "no-variables", no_argument,       NULL, ARG_NO_VARIABLES },
+                { NULL,           0,                 NULL, 0                }
+        };
+
+        int c;
 
         assert(argc >= 0);
         assert(argv);
 
-        left = argc - optind;
+        while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) {
+                switch (c) {
 
-        if (left <= 0)
-                /* Special rule: no arguments means "status" */
-                i = 0;
-        else {
-                if (streq(argv[optind], "help")) {
+                case 'h':
                         help();
                         return 0;
-                }
 
-                for (i = 0; i < ELEMENTSOF(verbs); i++)
-                        if (streq(argv[optind], verbs[i].verb))
-                                break;
+                case ARG_VERSION:
+                        printf(VERSION "\n");
+                        return 0;
 
-                if (i >= ELEMENTSOF(verbs)) {
-                        log_error("Unknown operation %s", argv[optind]);
+                case ARG_PATH:
+                        arg_path = optarg;
+                        break;
+
+                case ARG_NO_VARIABLES:
+                        arg_touch_variables = false;
+                        break;
+
+                case '?':
+                        return -EINVAL;
+
+                default:
+                        fprintf(stderr, "Unknown option code '%c'.\n", c);
                         return -EINVAL;
                 }
         }
 
-        switch (verbs[i].argc_cmp) {
+        return 1;
+}
 
-        case EQUAL:
-                if (left != verbs[i].argc) {
-                        log_error("Invalid number of arguments.");
-                        return -EINVAL;
+static int bootctl_main(int argc, char*argv[]) {
+        enum action {
+                ACTION_STATUS,
+                ACTION_INSTALL,
+                ACTION_UPDATE,
+                ACTION_REMOVE
+        } arg_action = ACTION_STATUS;
+        static const struct {
+                const char* verb;
+                enum action action;
+        } verbs[] = {
+                { "status",  ACTION_STATUS },
+                { "install", ACTION_INSTALL },
+                { "update",  ACTION_UPDATE },
+                { "remove",  ACTION_REMOVE },
+        };
+
+        sd_id128_t uuid = {};
+        uint32_t part = 0;
+        uint64_t pstart = 0;
+        uint64_t psize = 0;
+        unsigned int i;
+        int q;
+        int r;
+
+        r = parse_argv(argc, argv);
+        if (r <= 0)
+                goto finish;
+
+        if (argv[optind]) {
+                for (i = 0; i < ELEMENTSOF(verbs); i++) {
+                        if (!streq(argv[optind], verbs[i].verb))
+                                continue;
+                        arg_action = verbs[i].action;
+                        break;
+                }
+                if (i >= ELEMENTSOF(verbs)) {
+                        fprintf(stderr, "Unknown operation %s\n", argv[optind]);
+                        r = -EINVAL;
+                        goto finish;
                 }
+        }
+
+        if (!arg_path)
+                arg_path = "/boot";
+
+        if (geteuid() != 0) {
+                fprintf(stderr, "Need to be root.\n");
+                r = -EPERM;
+                goto finish;
+        }
+
+        r = verify_esp(arg_path, &part, &pstart, &psize, &uuid);
+        if (r == -ENODEV && !arg_path)
+                fprintf(stderr, "You might want to use --path= to indicate the path to your ESP, in case it is not mounted to /boot.\n");
+        if (r < 0)
+                goto finish;
+
+        switch (arg_action) {
+        case ACTION_STATUS: {
+                _cleanup_free_ char *fw_type = NULL;
+                _cleanup_free_ char *fw_info = NULL;
+                _cleanup_free_ char *loader = NULL;
+                _cleanup_free_ char *loader_path = NULL;
+                sd_id128_t loader_part_uuid = {};
+
+                efi_get_variable_string(EFI_VENDOR_LOADER, "LoaderFirmwareType", &fw_type);
+                efi_get_variable_string(EFI_VENDOR_LOADER, "LoaderFirmwareInfo", &fw_info);
+                efi_get_variable_string(EFI_VENDOR_LOADER, "LoaderInfo", &loader);
+                efi_get_variable_string(EFI_VENDOR_LOADER, "LoaderImageIdentifier", &loader_path);
+                efi_tilt_backslashes(loader_path);
+                efi_loader_get_device_part_uuid(&loader_part_uuid);
+
+                printf("System:\n");
+                printf("     Firmware: %s (%s)\n", fw_type, strna(fw_info));
+                printf("  Secure Boot: %s\n", is_efi_secure_boot() ? "enabled" : "disabled");
+                printf("   Setup Mode: %s\n", is_efi_secure_boot_setup_mode() ? "setup" : "user");
+                printf("\n");
+
+                printf("Loader:\n");
+                printf("      Product: %s\n", strna(loader));
+                if (!sd_id128_equal(loader_part_uuid, SD_ID128_NULL))
+                        printf("    Partition: /dev/disk/by-partuuid/%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x\n",
+                               SD_ID128_FORMAT_VAL(loader_part_uuid));
+                else
+                        printf("    Partition: n/a\n");
+                printf("         File: %s%s\n", draw_special_char(DRAW_TREE_RIGHT), strna(loader_path));
+                printf("\n");
+
+                r = status_binaries(arg_path, uuid);
+                if (r < 0)
+                        goto finish;
+
+                if (arg_touch_variables)
+                        r = status_variables();
                 break;
+        }
 
-        case MORE:
-                if (left < verbs[i].argc) {
-                        log_error("Too few arguments.");
-                        return -EINVAL;
-                }
+        case ACTION_INSTALL:
+        case ACTION_UPDATE:
+                umask(0002);
+
+                r = install_binaries(arg_path, arg_action == ACTION_INSTALL);
+                if (r < 0)
+                        goto finish;
+
+                if (arg_action == ACTION_INSTALL)
+                        install_loader_config(arg_path);
+
+                if (arg_touch_variables)
+                        r = install_variables(arg_path,
+                                              part, pstart, psize, uuid,
+                                              "/EFI/systemd/sd-boot" EFI_MACHINE_TYPE_NAME ".efi",
+                                              arg_action == ACTION_INSTALL);
                 break;
 
-        case LESS:
-                if (left > verbs[i].argc) {
-                        log_error("Too many arguments.");
-                        return -EINVAL;
+        case ACTION_REMOVE:
+                r = remove_binaries(arg_path);
+
+                if (arg_touch_variables) {
+                        q = remove_variables(uuid, "/EFI/systemd/sd-boot" EFI_MACHINE_TYPE_NAME ".efi", true);
+                        if (q < 0 && r == 0)
+                                r = q;
                 }
                 break;
-
-        default:
-                assert_not_reached("Unknown comparison operator.");
         }
 
-        return verbs[i].dispatch(argv + optind, left);
+finish:
+        return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
 }
 
 int main(int argc, char *argv[]) {
diff --git a/src/shared/efivars.c b/src/shared/efivars.c
index a319574527..5b3c5f09c8 100644
--- a/src/shared/efivars.c
+++ b/src/shared/efivars.c
@@ -31,6 +31,40 @@
 
 #ifdef ENABLE_EFI
 
+#define LOAD_OPTION_ACTIVE            0x00000001
+#define MEDIA_DEVICE_PATH                   0x04
+#define MEDIA_HARDDRIVE_DP                  0x01
+#define MEDIA_FILEPATH_DP                   0x04
+#define SIGNATURE_TYPE_GUID                 0x02
+#define MBR_TYPE_EFI_PARTITION_TABLE_HEADER 0x02
+#define END_DEVICE_PATH_TYPE                0x7f
+#define END_ENTIRE_DEVICE_PATH_SUBTYPE      0xff
+
+struct boot_option {
+        uint32_t attr;
+        uint16_t path_len;
+        uint16_t title[];
+} __attribute__((packed));
+
+struct drive_path {
+        uint32_t part_nr;
+        uint64_t part_start;
+        uint64_t part_size;
+        char signature[16];
+        uint8_t mbr_type;
+        uint8_t signature_type;
+} __attribute__((packed));
+
+struct device_path {
+        uint8_t type;
+        uint8_t sub_type;
+        uint16_t length;
+        union {
+                uint16_t path[0];
+                struct drive_path drive;
+        };
+} __attribute__((packed));
+
 bool is_efi_boot(void) {
         return access("/sys/firmware/efi", F_OK) >= 0;
 }
@@ -128,6 +162,66 @@ int efi_get_variable(
         return 0;
 }
 
+int efi_set_variable(
+                sd_id128_t vendor,
+                const char *name,
+                const void *value,
+                size_t size) {
+
+        struct var {
+                uint32_t attr;
+                char buf[];
+        } __attribute__((packed)) *buf = NULL;
+        char *p = NULL;
+        int fd = -1;
+        int r;
+
+        assert(name);
+
+        if (asprintf(&p,
+                     "/sys/firmware/efi/efivars/%s-%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x",
+                     name, SD_ID128_FORMAT_VAL(vendor)) < 0)
+                return -ENOMEM;
+
+        if (size == 0) {
+                r = unlink(p);
+                goto finish;
+        }
+
+        fd = open(p, O_WRONLY|O_CREAT|O_NOCTTY|O_CLOEXEC, 0644);
+        if (fd < 0) {
+                r = -errno;
+                goto finish;
+        }
+
+        buf = malloc(sizeof(uint32_t) + size);
+        if (!buf) {
+                r = -errno;
+                goto finish;
+        }
+
+        buf->attr = EFI_VARIABLE_NON_VOLATILE|EFI_VARIABLE_BOOTSERVICE_ACCESS|EFI_VARIABLE_RUNTIME_ACCESS;
+        memcpy(buf->buf, value, size);
+
+        r = write(fd, buf, sizeof(uint32_t) + size);
+        if (r < 0) {
+                r = -errno;
+                goto finish;
+        }
+
+        if ((size_t)r != sizeof(uint32_t) + size) {
+                r = -EIO;
+                goto finish;
+        }
+
+finish:
+        if (fd >= 0)
+                close(fd);
+        free(buf);
+        free(p);
+        return r;
+}
+
 int efi_get_variable_string(sd_id128_t vendor, const char *name, char **p) {
         _cleanup_free_ void *s = NULL;
         size_t ss = 0;
@@ -179,8 +273,8 @@ int efi_get_boot_option(
                 uint16_t id,
                 char **title,
                 sd_id128_t *part_uuid,
-                char **path) {
-
+                char **path,
+                bool *active) {
         struct boot_option {
                 uint32_t attr;
                 uint16_t path_len;
@@ -250,23 +344,23 @@ int efi_get_boot_option(
                                 break;
 
                         /* Type 0x7F – End of Hardware Device Path, Sub-Type 0xFF – End Entire Device Path */
-                        if (dpath->type == 0x7f && dpath->sub_type == 0xff)
+                        if (dpath->type == END_DEVICE_PATH_TYPE && dpath->sub_type == END_ENTIRE_DEVICE_PATH_SUBTYPE)
                                 break;
 
                         dnext += dpath->length;
 
                         /* Type 0x04 – Media Device Path */
-                        if (dpath->type != 0x04)
+                        if (dpath->type != MEDIA_DEVICE_PATH)
                                 continue;
 
                         /* Sub-Type 1 – Hard Drive */
-                        if (dpath->sub_type == 0x01) {
+                        if (dpath->sub_type == MEDIA_HARDDRIVE_DP) {
                                 /* 0x02 – GUID Partition Table */
-                                if (dpath->drive.mbr_type != 0x02)
+                                if (dpath->drive.mbr_type != MBR_TYPE_EFI_PARTITION_TABLE_HEADER)
                                         continue;
 
                                 /* 0x02 – GUID signature */
-                                if (dpath->drive.signature_type != 0x02)
+                                if (dpath->drive.signature_type != SIGNATURE_TYPE_GUID)
                                         continue;
 
                                 if (part_uuid)
@@ -275,8 +369,9 @@ int efi_get_boot_option(
                         }
 
                         /* Sub-Type 4 – File Path */
-                        if (dpath->sub_type == 0x04 && !p && path) {
+                        if (dpath->sub_type == MEDIA_FILEPATH_DP && !p && path) {
                                 p = utf16_to_utf8(dpath->path, dpath->length-4);
+                                efi_tilt_backslashes(p);
                                 continue;
                         }
                 }
@@ -288,6 +383,8 @@ int efi_get_boot_option(
                 *part_uuid = p_uuid;
         if (path)
                 *path = p;
+        if (active)
+                *active = !!header->attr & LOAD_OPTION_ACTIVE;
 
         return 0;
 err:
@@ -296,6 +393,126 @@ err:
         return err;
 }
 
+static void to_utf16(uint16_t *dest, const char *src) {
+        int i;
+
+        for (i = 0; src[i] != '\0'; i++)
+                dest[i] = src[i];
+        dest[i] = '\0';
+}
+
+struct guid {
+        uint32_t u1;
+        uint16_t u2;
+        uint16_t u3;
+        uint8_t u4[8];
+} __attribute__((packed));
+
+static void id128_to_efi_guid(sd_id128_t id, void *guid) {
+        struct guid *uuid = guid;
+
+        uuid->u1 = id.bytes[0] << 24 | id.bytes[1] << 16 | id.bytes[2] << 8 | id.bytes[3];
+        uuid->u2 = id.bytes[4] << 8 | id.bytes[5];
+        uuid->u3 = id.bytes[6] << 8 | id.bytes[7];
+        memcpy(uuid->u4, id.bytes+8, sizeof(uuid->u4));
+}
+
+static uint16_t *tilt_slashes(uint16_t *s) {
+        uint16_t *p;
+
+        for (p = s; *p; p++)
+                if (*p == '/')
+                        *p = '\\';
+
+        return s;
+}
+
+char *efi_tilt_backslashes(char *s) {
+        char *p;
+
+        for (p = s; *p; p++)
+                if (*p == '\\')
+                        *p = '/';
+
+        return s;
+}
+
+int efi_add_boot_option(uint16_t id, const char *title,
+                        uint32_t part, uint64_t pstart, uint64_t psize,
+                        sd_id128_t part_uuid, const char *path) {
+        char boot_id[9];
+        char *buf;
+        size_t size;
+        size_t title_len;
+        size_t path_len;
+        struct boot_option *option;
+        struct device_path *devicep;
+        int err;
+
+        title_len = (strlen(title)+1) * 2;
+        path_len = (strlen(path)+1) * 2;
+
+        buf = calloc(sizeof(struct boot_option) + title_len +
+                     sizeof(struct drive_path) +
+                     sizeof(struct device_path) + path_len, 1);
+        if (!buf) {
+                err = -ENOMEM;
+                goto finish;
+        }
+
+        /* header */
+        option = (struct boot_option *)buf;
+        option->attr = LOAD_OPTION_ACTIVE;
+        option->path_len = offsetof(struct device_path, drive) + sizeof(struct drive_path) +
+                           offsetof(struct device_path, path) + path_len +
+                           offsetof(struct device_path, path);
+        to_utf16(option->title, title);
+        size = offsetof(struct boot_option, title) + title_len;
+
+        /* partition info */
+        devicep = (struct device_path *)(buf + size);
+        devicep->type = MEDIA_DEVICE_PATH;
+        devicep->sub_type = MEDIA_HARDDRIVE_DP;
+        devicep->length = offsetof(struct device_path, drive) + sizeof(struct drive_path);
+        devicep->drive.part_nr = part;
+        devicep->drive.part_start = pstart;
+        devicep->drive.part_size =  psize;
+        devicep->drive.signature_type = SIGNATURE_TYPE_GUID;
+        devicep->drive.mbr_type = MBR_TYPE_EFI_PARTITION_TABLE_HEADER;
+        id128_to_efi_guid(part_uuid, devicep->drive.signature);
+        size += devicep->length;
+
+        /* path to loader */
+        devicep = (struct device_path *)(buf + size);
+        devicep->type = MEDIA_DEVICE_PATH;
+        devicep->sub_type = MEDIA_FILEPATH_DP;
+        devicep->length = offsetof(struct device_path, path) + path_len;
+        to_utf16(devicep->path, path);
+        tilt_slashes(devicep->path);
+        size += devicep->length;
+
+        /* end of path */
+        devicep = (struct device_path *)(buf + size);
+        devicep->type = END_DEVICE_PATH_TYPE;
+        devicep->sub_type = END_ENTIRE_DEVICE_PATH_SUBTYPE;
+        devicep->length = offsetof(struct device_path, path);
+        size += devicep->length;
+
+        snprintf(boot_id, sizeof(boot_id), "Boot%04X", id);
+        err = efi_set_variable(EFI_VENDOR_GLOBAL, boot_id, buf, size);
+
+finish:
+        free(buf);
+        return err;
+}
+
+int efi_remove_boot_option(uint16_t id) {
+        char boot_id[9];
+
+        snprintf(boot_id, sizeof(boot_id), "Boot%04X", id);
+        return efi_set_variable(EFI_VENDOR_GLOBAL, boot_id, NULL, 0);
+}
+
 int efi_get_boot_order(uint16_t **order) {
         void *buf;
         size_t l;
@@ -320,6 +537,10 @@ int efi_get_boot_order(uint16_t **order) {
         return (int) (l / sizeof(uint16_t));
 }
 
+int efi_set_boot_order(uint16_t *order, size_t n) {
+        return efi_set_variable(EFI_VENDOR_GLOBAL, "BootOrder", order, n * sizeof(uint16_t));
+}
+
 static int boot_id_hex(const char s[4]) {
         int i;
         int id = 0;
diff --git a/src/shared/efivars.h b/src/shared/efivars.h
index 7921bedc9f..82364565ba 100644
--- a/src/shared/efivars.h
+++ b/src/shared/efivars.h
@@ -30,17 +30,26 @@
 
 #define EFI_VENDOR_LOADER SD_ID128_MAKE(4a,67,b0,82,0a,4c,41,cf,b6,c7,44,0b,29,bb,8c,4f)
 #define EFI_VENDOR_GLOBAL SD_ID128_MAKE(8b,e4,df,61,93,ca,11,d2,aa,0d,00,e0,98,03,2b,8c)
+#define EFI_VARIABLE_NON_VOLATILE       0x0000000000000001
+#define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002
+#define EFI_VARIABLE_RUNTIME_ACCESS     0x0000000000000004
 
 bool is_efi_boot(void);
 int is_efi_secure_boot(void);
 int is_efi_secure_boot_setup_mode(void);
 
 int efi_get_variable(sd_id128_t vendor, const char *name, uint32_t *attribute, void **value, size_t *size);
+int efi_set_variable(sd_id128_t vendor, const char *name, const void *value, size_t size);
 int efi_get_variable_string(sd_id128_t vendor, const char *name, char **p);
 
-int efi_get_boot_option(uint16_t nr, char **title, sd_id128_t *partuuid, char **path);
+int efi_get_boot_option(uint16_t nr, char **title, sd_id128_t *part_uuid, char **path, bool *active);
+int efi_add_boot_option(uint16_t id, const char *title, uint32_t part, uint64_t pstart, uint64_t psize, sd_id128_t part_uuid, const char *path);
+int efi_remove_boot_option(uint16_t id);
 int efi_get_boot_order(uint16_t **order);
+int efi_set_boot_order(uint16_t *order, size_t n);
 int efi_get_boot_options(uint16_t **options);
 
 int efi_loader_get_device_part_uuid(sd_id128_t *u);
 int efi_loader_get_boot_usec(usec_t *firmware, usec_t *loader);
+
+char *efi_tilt_backslashes(char *s);