gen_initramfs.sh: always output cpio even without -o option

Currently, this script outputs a cpio file when -o option is
given, but otherwise a text file in the format recognized by
gen_init_cpio.

This behavior is unclear. Make it always output a cpio file.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

usr/gen_initramfs.sh

@@ -6,7 +6,6 @@
 #
 # Generate a cpio packed initramfs. It uses gen_init_cpio to generate
 # the cpio archive, and then compresses it.
-# The script may also be used to generate the inputfile used for gen_init_cpio
 # This script assumes that gen_init_cpio is located in usr/ directory
 
 # error out on errors
@@ -71,8 +70,8 @@ print_mtime() {
 		my_mtime=$(find "$1" -printf "%T@\n" | sort -r | head -n 1)
 	fi
 
-	echo "# Last modified: ${my_mtime}" >> ${output}
-	echo "" >> ${output}
+	echo "# Last modified: ${my_mtime}" >> $cpio_list
+	echo "" >> $cpio_list
 }
 
 list_parse() {
@@ -125,7 +124,7 @@ parse() {
 			;;
 	esac
 
-	echo "${str}" >> ${output}
+	echo "${str}" >> $cpio_list
 
 	return 0
 }
@@ -141,7 +140,7 @@ unknown_option() {
 }
 
 header() {
-	printf "\n#####################\n# $1\n" >> ${output}
+	printf "\n#####################\n# $1\n" >> $cpio_list
 }
 
 # process one directory (incl sub-directories)
@@ -177,8 +176,8 @@ input_file() {
 			[ -n "$dep_list" ] && echo "$1" >> $dep_list
 			return 0
 		fi
-		print_mtime "$1" >> ${output}
-		cat "$1"         >> ${output}
+		print_mtime "$1" >> $cpio_list
+		cat "$1"         >> $cpio_list
 		if [ -n "$dep_list" ]; then
 		        echo "$1 \\"  >> $dep_list
 			cat "$1" | while read type dir file perm ; do
@@ -200,9 +199,9 @@ root_uid=0
 root_gid=0
 dep_list=
 cpio_file=
-cpio_list=
+cpio_list=$(mktemp ${TMPDIR:-/tmp}/cpiolist.XXXXXX)
 output="/dev/stdout"
-output_file=""
+output_file="/dev/stdout"
 is_cpio_compressed=
 compr="gzip -n -9 -f"
 
@@ -217,8 +216,7 @@ while [ $# -gt 0 ]; do
 			;;
 		"-o")	# generate compressed cpio image named $1
 			output_file="$1"
-			cpio_list="$(mktemp ${TMPDIR:-/tmp}/cpiolist.XXXXXX)"
-			output=${cpio_list}
+			output=$cpio_list
 			echo "$output_file" | grep -q "\.gz$" \
 			&& [ -x "`which gzip 2> /dev/null`" ] \
 			&& compr="gzip -n -9 -f"
@@ -269,27 +267,25 @@ done
 
 # If output_file is set we will generate cpio archive and compress it
 # we are careful to delete tmp files
-if [ ! -z ${output_file} ]; then
-	if [ -z ${cpio_file} ]; then
-		timestamp=
-		if test -n "$KBUILD_BUILD_TIMESTAMP"; then
-			timestamp="$(date -d"$KBUILD_BUILD_TIMESTAMP" +%s || :)"
-			if test -n "$timestamp"; then
-				timestamp="-t $timestamp"
-			fi
+if [ -z ${cpio_file} ]; then
+	timestamp=
+	if test -n "$KBUILD_BUILD_TIMESTAMP"; then
+		timestamp="$(date -d"$KBUILD_BUILD_TIMESTAMP" +%s || :)"
+		if test -n "$timestamp"; then
+			timestamp="-t $timestamp"
 		fi
-		cpio_tfile="$(mktemp ${TMPDIR:-/tmp}/cpiofile.XXXXXX)"
-		usr/gen_init_cpio $timestamp ${cpio_list} > ${cpio_tfile}
-	else
-		cpio_tfile=${cpio_file}
-	fi
-	rm ${cpio_list}
-	if [ "${is_cpio_compressed}" = "compressed" ]; then
-		cat ${cpio_tfile} > ${output_file}
-	else
-		(cat ${cpio_tfile} | ${compr}  - > ${output_file}) \
-		|| (rm -f ${output_file} ; false)
 	fi
-	[ -z ${cpio_file} ] && rm ${cpio_tfile}
+	cpio_tfile="$(mktemp ${TMPDIR:-/tmp}/cpiofile.XXXXXX)"
+	usr/gen_init_cpio $timestamp ${cpio_list} > ${cpio_tfile}
+else
+	cpio_tfile=${cpio_file}
+fi
+rm ${cpio_list}
+if [ "${is_cpio_compressed}" = "compressed" ]; then
+	cat ${cpio_tfile} > ${output_file}
+else
+	(cat ${cpio_tfile} | ${compr}  - > ${output_file}) \
+	|| (rm -f ${output_file} ; false)
 fi
+[ -z ${cpio_file} ] && rm ${cpio_tfile}
 exit 0