tmpfiles: Accept filenames as command line arguments

This brings us closer to being able to use tmpfiles.sh as a full
replacement for systemd-tmpfiles.

This closes #83.

sh/tmpfiles.sh.in

@@ -264,6 +264,7 @@ _Z() {
 BOOT=0 CREATE=0 REMOVE=0 CLEAN=0 VERBOSE=0 DRYRUN=0 error=0 LINENO=0
 EXCLUDE=
 PREFIX=
+FILES=
 
 while [ $# -gt 0 ]; do
 	case $1 in
@@ -276,6 +277,7 @@ while [ $# -gt 0 ]; do
 		--exclude-prefix=*) EXCLUDE="${EXCLUDE}${1##--exclude-prefix=} " ;;
 		--prefix=*) PREFIX="${PREFIX}${1##--prefix=} " ;;
 		-*) invalid_option "$1" ;;
+		*) FILES="${FILES} $1"
 	esac
 	shift
 done
@@ -290,12 +292,11 @@ if [ "$CREATE$REMOVE" = '00' ]; then
 	exit 1
 fi
 
-FILE=
-fragments=
 # XXX: The harcoding of /usr/lib/ is an explicit choice by upstream
-tmpfiles_dirs='/usr/lib/tmpfiles.d/ /run/tmpfiles.d/ /etc/tmpfiles.d/'
+tmpfiles_dirs='/usr/lib/tmpfiles.d /run/tmpfiles.d /etc/tmpfiles.d'
 tmpfiles_basenames=''
-tmpfiles_d=''
+
+if [ -z "${FILES}" ]; then
 	# Build a list of sorted unique basenames
 	# directories declared later in the tmpfiles_d array will override earlier
 	# directories, on a per file basename basis.
@@ -309,21 +310,31 @@ for d in ${tmpfiles_dirs} ; do
 			[ -f $f ] && tmpfiles_basenames="${tmpfiles_basenames}\n${f##*/}"
 		done # for f in ${d}
 	done # for d in ${tmpfiles_dirs}
-tmpfiles_basenames="$(printf "${tmpfiles_basenames}\n" | sort -u )"
+	FILES="$(printf "${tmpfiles_basenames}\n" | sort -u )"
+fi
 
-for b in $tmpfiles_basenames ; do
+tmpfiles_d=''
+
+for b in ${FILES} ; do
+	if [ "${b##*/}" != "${b}" ]; then
+		# The user specified a path on the command line
+		# Just pass it through unaltered
+		tmpfiles_d="${tmpfiles_d} ${b}"
+	else
 		real_f=''
 		for d in $tmpfiles_dirs ; do
 			f=${d}/${b}
 			[ -f "${f}" ] && real_f=$f
 		done
 		[ -f "${real_f}" ] && tmpfiles_d="${tmpfiles_d} ${real_f}"
+	fi
 done
 
 error=0
 
 # loop through the gathered fragments, sorted globally by filename.
 # `/run/tmpfiles/foo.conf' will always be read after `/etc/tmpfiles.d/bar.conf'
+FILE=
 for FILE in $tmpfiles_d ; do
 	LINENUM=0