Add support for SysV-only scripts in runparts

This patch extens the SysV compatibility support in Finit by adding
support for limiting `runparts` to run only SNNfoo, or KNNfoo, style
scripts from a directory.

Additionally, by default `runparts` now runs entirely in the background
without any progress.  To enable progress, an optional argument has been
added to the runparts command line.

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>

test/Makefile.am

@@ -2,9 +2,12 @@ SUBDIRS                  = lib src
 
 EXTRA_DIST		 = skel/bin/busybox-x86_64.sha256 skel/sbin/service.sh skel/etc/env  \
 			   skel/bin/pre.sh skel/bin/post.sh skel/bin/ready.sh skel/bin/slay  \
-			   skel/sbin/fail.sh skel/usr/share/runlevel/ref.log		     \
+			   skel/sbin/fail.sh skel/usr/share/runparts/ref.log		     \
+			   skel/usr/share/runparts/sysv.log	     			     \
 			   skel/etc/rc.d/foo.sh skel/etc/rc.d/S01abc.sh			     \
 			   skel/etc/rc.d/test.sh skel/etc/rc.d/S02def.sh		     \
+			   skel/etc/rcS.d/foo.sh skel/etc/rcS.d/test.sh			     \
+			   skel/etc/rcS.d/S01abc.sh skel/etc/rcS.d/S02def.sh		     \
 			   skel/cdrom/.empty skel/dev/shm/.empty skel/dev/pts/.empty	     \
 			   skel/etc/inittab skel/etc/hostname skel/etc/fstab 		     \
 			   skel/etc/init.d/rcS skel/etc/init.d/rcK skel/tmp/.empty	     \
@@ -41,6 +44,7 @@ EXTRA_DIST		+= runlevel.sh
 EXTRA_DIST		+= run-restart-forever.sh
 EXTRA_DIST		+= run-task-tricks.sh
 EXTRA_DIST		+= runparts.sh
+EXTRA_DIST		+= sysvparts.sh
 EXTRA_DIST		+= start-stop-service.sh
 EXTRA_DIST		+= start-stop-service-sub-config.sh
 EXTRA_DIST		+= start-kill-service.sh
@@ -80,6 +84,7 @@ TESTS			+= rclocal.sh
 TESTS			+= ready-serv.sh
 TESTS			+= restart-self.sh
 TESTS			+= runlevel.sh
+TESTS			+= sysvparts.sh
 TESTS			+= run-restart-forever.sh
 TESTS			+= run-task-tricks.sh
 TESTS			+= runparts.sh

test/runparts.sh

@@ -37,5 +37,5 @@ while true; do
     sleep 1
 done
 
-texec diff -u /usr/share/runlevel/ref.log /tmp/runparts.log
-texec cmp /usr/share/runlevel/ref.log /tmp/runparts.log || fail "runparts in wrong order"
+texec diff -u /usr/share/runparts/ref.log /tmp/runparts.log
+texec cmp /usr/share/runparts/ref.log /tmp/runparts.log || fail "runparts in wrong order"

test/skel/etc/rcS.d/S01abc.sh

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+echo "$0 $*" >> /tmp/sysv.log

test/skel/etc/rcS.d/S02def.sh

@@ -0,0 +1 @@
+S01abc.sh

test/skel/etc/rcS.d/foo.sh

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+echo "$0" >> /tmp/sysv.log

test/skel/etc/rcS.d/test.sh

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+echo "$0" >> /tmp/sysv.log

test/skel/usr/share/runparts/sysv.log

@@ -0,0 +1,2 @@
+/etc/rcS.d/S01abc.sh start
+/etc/rcS.d/S02def.sh start

test/sysvparts.sh

@@ -0,0 +1,42 @@
+#!/bin/sh
+#
+# Verifies SysV runparts behavior: to run all scripts in a directory at
+# the end of system bootstrap, right before calling /etc/rc.local:
+#
+#  - only SNNfoo or KNNfoo executable scripts should be called
+#  - always in alphabetical order
+#  - SNNfoo should be called with a 'start' argument
+#  - KNNfoo should be called with a 'stop' argument
+#
+
+TEST_DIR=$(dirname "$0")
+#DEBUG=1
+
+# shellcheck disable=SC2034
+BOOTSTRAP="runparts sysv /etc/rcS.d"
+
+# shellcheck source=/dev/null
+. "$TEST_DIR/lib/setup.sh"
+
+test_setup()
+{
+    say "Test start $(date)"
+ }
+
+test_teardown()
+{
+    say "Test done $(date)"
+}
+
+while true; do
+    lvl=$(texec initctl runlevel)
+    say "Current runlevel $lvl"
+    if [ "$lvl" = "N 2" ]; then
+	break;
+    fi
+    sleep 1
+done
+
+texec cat /tmp/sysv.log
+texec diff -u /usr/share/runparts/sysv.log /tmp/sysv.log
+texec cmp /usr/share/runparts/sysv.log /tmp/sysv.log || fail "runparts sysv in wrong order"