Don't use do syncheck for target all and refine syncheck

instead of "dash -n" we now use "bash --posix -n"
we also check for "[[ " in posix shell files

Makefile

@@ -38,7 +38,7 @@ manpages = $(man1pages) $(man5pages) $(man7pages) $(man8pages)
 
 .PHONY: install clean archive rpm testimage test all check AUTHORS doc dracut-version.sh
 
-all: syncheck dracut-version.sh dracut-install
+all: dracut-version.sh dracut-install
 
 DRACUT_INSTALL_OBJECTS = \
         install/dracut-install.o \
@@ -176,11 +176,11 @@ rpm: dracut-$(VERSION).tar.bz2
 	( mv "$$rpmbuild"/$$(arch)/*.rpm .; mv "$$rpmbuild"/*.src.rpm .;rm -fr "$$rpmbuild"; ls *.rpm )
 
 syncheck:
-	@ret=0;for i in dracut-initramfs-restore.sh dracut-logger.sh \
-                        modules.d/99base/init.sh modules.d/*/*.sh; do \
+	@ret=0;for i in dracut-initramfs-restore.sh modules.d/*/*.sh; do \
                 [ "$${i##*/}" = "module-setup.sh" ] && continue; \
                 read line < "$$i"; [ "$${line#*bash*}" != "$$line" ] && continue; \
-		[ $$V ] && echo "dash syntax check: $$i"; dash -n "$$i" ; ret=$$(($$ret+$$?)); \
+		[ $$V ] && echo "posix syntax check: $$i"; bash --posix -n "$$i" ; ret=$$(($$ret+$$?)); \
+		[ $$V ] && echo "checking for [[: $$i"; if grep -Fq '[[ ' "$$i" ; then ret=$$(($$ret+1)); echo "$$i contains [["; fi \
 	done;exit $$ret
 	@ret=0;for i in *.sh mkinitrd-dracut.sh modules.d/*/*.sh \
 	                modules.d/*/module-setup.sh; do \

dracut-logger.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 # -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
 # ex: ts=8 sw=4 et filetype=sh
 #

dracut.spec

@@ -30,7 +30,7 @@ URL: https://dracut.wiki.kernel.org/
 # http://git.kernel.org/?p=boot/dracut/dracut.git;a=snapshot;h=%{version};sf=tgz
 Source0: http://www.kernel.org/pub/linux/utils/boot/dracut/dracut-%{version}.tar.bz2
 
-BuildRequires: dash bash git
+BuildRequires: bash git
 
 %if 0%{?fedora} || 0%{?rhel}
 BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)