[PATCH] Select cpio_list or source directory for initramfs image

Attached is a patch that adds CONFIG_INITRAMFS_SOURCE, enabling you to
either specify a file as cpio_list, or a directory to generate a list from.

It depreciate the INITRAMFS_LIST environment variable introduced not long
ago.

There are some issues (suggestions/patches welcome) that I am not
sure about:
1) I put the menu entry under block devices, but I am not sure if
   this is the correct location?
2) There might be a better (or more correct) way to do this with
   kbuild?
3) Variable names and especially help text needs some love.
4) I am not sure if I am duplicating work in progress?

Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 84 insertions, 0 deletions

diff --git a/scripts/gen_initramfs_list.sh b/scripts/gen_initramfs_list.sh
new file mode 100644
index 00000000000000..59b810396c7b89
--- /dev/null
+++ b/scripts/gen_initramfs_list.sh
@@ -0,0 +1,84 @@
+#!/bin/bash
+# Copyright (C) Martin Schlemmer <azarah@nosferatu.za.org>
+# Released under the terms of the GNU GPL
+#
+# A script to generate newline separated entries (to stdout) from a directory's
+# contents suitable for use as a cpio_list for gen_init_cpio.
+#
+# Arguements: $1 -- the source directory
+#
+# TODO:  Add support for symlinks, sockets and pipes when gen_init_cpio
+#        supports them.
+
+usage() {
+	echo "Usage: $0 initramfs-source-dir"
+	exit 1
+}
+
+srcdir=$(echo "$1" | sed -e 's://*:/:g')
+
+if [ "$#" -gt 1 -o ! -d "${srcdir}" ]; then
+	usage
+fi
+
+filetype() {
+	local argv1="$1"
+
+	if [ -f "${argv1}" ]; then
+		echo "file"
+	elif [ -d "${argv1}" ]; then
+		echo "dir"
+	elif [ -b "${argv1}" -o -c "${argv1}" ]; then
+		echo "nod"
+	else
+		echo "invalid"
+	fi
+	return 0
+}
+
+parse() {
+	local location="$1"
+	local name="${location/${srcdir}//}"
+	local mode="$2"
+	local uid="$3"
+	local gid="$4"
+	local ftype=$(filetype "${location}")
+	local str="${mode} ${uid} ${gid}"
+
+	[ "${ftype}" == "invalid" ] && return 0
+	[ "${location}" == "${srcdir}" ] && return 0
+
+	case "${ftype}" in
+		"file")
+			str="${ftype} ${name} ${location} ${str}"
+			;;
+		"nod")
+			local dev_type=
+			local maj=$(LC_ALL=C ls -l "${location}" | \
+					gawk '{sub(/,/, "", $5); print $5}')
+			local min=$(LC_ALL=C ls -l "${location}" | \
+					gawk '{print $6}')
+
+			if [ -b "${location}" ]; then
+				dev_type="b"
+			else
+				dev_type="c"
+			fi
+			str="${ftype} ${name} ${str} ${dev_type} ${maj} ${min}"
+			;;
+		*)
+			str="${ftype} ${name} ${str}"
+			;;
+	esac
+
+	echo "${str}"
+
+	return 0
+}
+
+find "${srcdir}" -printf "%p %m %U %G\n" | \
+while read x; do
+	parse ${x}
+done
+
+exit 0