mkosi: Use initrd as exitrd

Let's speed up image builds by avoiding building
an exitrd and instead reusing the initrd image for
the same purpose.

man/systemd-repart.xml

@@ -504,10 +504,10 @@
         <term><option>--defer-partitions-empty=yes</option></term>
 
         <listitem><para>This is very similar to <option>--defer-partitions=</option> but automatically
-        selects all partitions for deferral that have <option>Format=empty</option> set. It may be used in
+        selects all partitions for deferral that have <option>Format=empty</option> set and do not configure
-        conjunction with <option>--defer-partitions=</option> or
+        a custom label, or which set <option>Label=_empty</option>. It may be used in conjunction with
-        <option>--defer-partitions-factory-reset=yes</option>, in which case all matching partitions are
+        <option>--defer-partitions=</option> or <option>--defer-partitions-factory-reset=yes</option>, in
-        deferred.</para>
+        which case all matching partitions are deferred.</para>
 
         <xi:include href="version-info.xml" xpointer="v259"/></listitem>
       </varlistentry>

mkosi/mkosi.conf

@@ -3,7 +3,6 @@
 [Config]
 MinimumVersion=commit:9e31235211d975bae25622d6205a8396d104335e
 Dependencies=
-        exitrd
         initrd
         minimal-base
         minimal-0
@@ -57,7 +56,7 @@ ExtraTrees=
         %O/minimal-1.root-%a-verity.raw:/usr/share/minimal_1.verity
         %O/minimal-1.root-%a-verity-sig.raw:/usr/share/minimal_1.verity.sig
         %O/minimal-base:/usr/share/TEST-13-NSPAWN-container-template
-        %O/exitrd:/exitrd
+        %O/initrd:/exitrd
 
 Initrds=%O/initrd
 KernelInitrdModules=default
@@ -94,6 +93,7 @@ Packages=
         bash-completion
         binutils
         coreutils
+        cpio
         curl
         diffutils
         dnsmasq

mkosi/mkosi.images/exitrd/mkosi.conf

@@ -1,21 +0,0 @@
-# SPDX-License-Identifier: LGPL-2.1-or-later
-
-[Output]
-Format=directory
-
-[Build]
-Environment=SYSTEMD_REQUIRED_DEPS_ONLY=1
-
-[Content]
-Bootable=no
-Locale=C.UTF-8
-WithDocs=no
-CleanPackageMetadata=yes
-MakeInitrd=yes
-
-Packages=
-        coreutils
-        bash
-
-[Include]
-Include=%D/mkosi/mkosi.sanitizers

mkosi/mkosi.images/exitrd/mkosi.conf.d/arch.conf

@@ -1,31 +0,0 @@
-# SPDX-License-Identifier: LGPL-2.1-or-later
-
-[Match]
-Distribution=arch
-
-[Content]
-PrepareScripts=%D/mkosi/mkosi.conf.d/arch/systemd.prepare
-VolatilePackages=
-        systemd
-        systemd-libs
-
-RemoveFiles=
-        # Arch Linux doesn't split their gcc-libs package so we manually remove
-        # unneeded stuff here to make sure it doesn't end up in the image.
-        /usr/lib/libgfortran.so*
-        /usr/lib/libgo.so*
-        /usr/lib/libgomp.so*
-        /usr/lib/libgphobos.so*
-        /usr/lib/libobjc.so*
-        /usr/lib/libgdruntime.so*
-
-        # Remove all files that are only required for development.
-        /usr/lib/*.a
-        /usr/include/*
-
-        /usr/share/i18n/*
-        /usr/share/hwdata/*
-        /usr/share/iana-etc/*
-        /usr/share/locale/*
-        /usr/share/terminfo/*
-        /usr/share/zoneinfo/*

mkosi/mkosi.images/exitrd/mkosi.conf.d/build.conf

@@ -1,9 +0,0 @@
-# SPDX-License-Identifier: LGPL-2.1-or-later
-
-# Add a dependency on the build image unless NO_BUILD=1.
-
-[Match]
-Environment=!NO_BUILD=1
-
-[Config]
-Dependencies=build

mkosi/mkosi.images/exitrd/mkosi.conf.d/centos-fedora.conf

@@ -1,10 +0,0 @@
-# SPDX-License-Identifier: LGPL-2.1-or-later
-
-[Match]
-Distribution=|centos
-Distribution=|fedora
-
-[Content]
-PrepareScripts=%D/mkosi/mkosi.conf.d/centos-fedora/systemd.prepare
-VolatilePackages=
-        systemd-standalone-shutdown

mkosi/mkosi.images/exitrd/mkosi.conf.d/debian.conf

@@ -1,9 +0,0 @@
-# SPDX-License-Identifier: LGPL-2.1-or-later
-
-[Match]
-Distribution=debian
-
-[Content]
-PrepareScripts=%D/mkosi/mkosi.conf.d/debian-ubuntu/systemd.prepare
-VolatilePackages=
-        systemd-standalone-shutdown

mkosi/mkosi.images/exitrd/mkosi.conf.d/opensuse.conf

@@ -1,18 +0,0 @@
-# SPDX-License-Identifier: LGPL-2.1-or-later
-
-[Match]
-Distribution=opensuse
-
-[Content]
-PrepareScripts=%D/mkosi/mkosi.conf.d/opensuse/systemd.prepare
-Packages=
-        diffutils
-        grep
-        patterns-base-minimal_base
-        sed
-        xz
-
-VolatilePackages=
-        libsystemd0
-        libudev1
-        systemd

mkosi/mkosi.images/exitrd/mkosi.conf.d/ubuntu.conf

@@ -1,12 +0,0 @@
-# SPDX-License-Identifier: LGPL-2.1-or-later
-
-[Match]
-Distribution=ubuntu
-
-[Content]
-PrepareScripts=%D/mkosi/mkosi.conf.d/debian-ubuntu/systemd.prepare
-VolatilePackages=
-        libsystemd-shared
-        libsystemd0
-        libudev1
-        systemd

src/basic/signal-util.c

@@ -241,7 +241,7 @@ int signal_is_blocked(int sig) {
 int autoreaping_enabled(void) {
         struct sigaction sa;
 
-        if (sigaction(SIGCHLD, /* __act= */ NULL, &sa) < 0)
+        if (sigaction(SIGCHLD, /* act= */ NULL, &sa) < 0)
                 return -errno;
 
         return sa.sa_handler == SIG_IGN || FLAGS_SET(sa.sa_flags, SA_NOCLDWAIT);

test/integration-tests/TEST-80-NOTIFYACCESS/TEST-80-NOTIFYACCESS.units/reload-timeout.sh

@@ -14,9 +14,11 @@ sync_in() {
 wait_for_signal() {
     local notify="${1:?}"
     local p
+    local c
 
     sleep infinity &
     p=$!
+    c="${COUNTER:-0}"
 
     # Notify readiness after 'sleep' is running to avoid race
     # condition where the SIGHUP is sent before 'sleep' is ready to
@@ -25,7 +27,13 @@ wait_for_signal() {
         systemd-notify --ready
     fi
 
-    wait "$p" || :
+    # ...but even that is not sufficient sometimes, so check if the
+    # callback has already ran by checking the counter
+    if [ "$c" -ne "$COUNTER" ]; then
+        kill -TERM "$p" || :
+    else
+        wait "$p" || :
+    fi
 }
 
 sighup_handler() {

test/units/TEST-08-INITRD.sh

@@ -22,9 +22,8 @@ test -d /run/initrd-mount-target
 mountpoint /run/initrd-mount-target
 [[ -e /run/initrd-mount-target/hello-world ]]
 
-# Copy the prepared exitrd to its intended location. Check the respective
+# Copy the prepared exitrd to its intended location.
-# test.sh file for details
 mkdir -p /run/initramfs
-cp -r /exitrd/* /run/initramfs/
+unzstd --stdout /exitrd | cpio --extract --make-directories --directory /run/initramfs/
 
 touch /testok