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initramfs: add default_cpio_list, and delete -d option support

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When CONFIG_INITRAMFS_SOURCE is empty, the Makefile passes the -d
option to gen_initramfs.sh to create the default initramfs, which
contains /dev, /dev/console, and /root.

This commit simplifies the default behavior; remove the -d option,
and add the default cpio list.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
This commit is contained in:
Masahiro Yamada 2020-01-05 00:02:35 +09:00
parent 9668097599
commit 4538f41305
3 changed files with 7 additions and 17 deletions
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2
usr/Makefile
View File

@ -25,7 +25,7 @@ $(obj)/initramfs_data.o: $(obj)/$(datafile_y) FORCE
hostprogs-y := gen_init_cpio hostprogs-y := gen_init_cpio
ramfs-input := $(if $(filter-out "",$(CONFIG_INITRAMFS_SOURCE)), \ ramfs-input := $(if $(filter-out "",$(CONFIG_INITRAMFS_SOURCE)), \
$(shell echo $(CONFIG_INITRAMFS_SOURCE)),-d) $(shell echo $(CONFIG_INITRAMFS_SOURCE)),$(srctree)/$(src)/default_cpio_list)
ramfs-args := \ ramfs-args := \
$(if $(CONFIG_INITRAMFS_ROOT_UID), -u $(CONFIG_INITRAMFS_ROOT_UID)) \ $(if $(CONFIG_INITRAMFS_ROOT_UID), -u $(CONFIG_INITRAMFS_ROOT_UID)) \
$(if $(CONFIG_INITRAMFS_ROOT_GID), -g $(CONFIG_INITRAMFS_ROOT_GID)) $(if $(CONFIG_INITRAMFS_ROOT_GID), -g $(CONFIG_INITRAMFS_ROOT_GID))

6
usr/default_cpio_list Normal file
View File

@ -0,0 +1,6 @@
# SPDX-License-Identifier: GPL-2.0-only
# This is a very simple, default initramfs
dir /dev 0755 0 0
nod /dev/console 0600 0 0 c 5 1
dir /root 0700 0 0

16
usr/gen_initramfs.sh
View File

@ -28,7 +28,6 @@ $0 [-o <file>] [-l <dep_list>] [-u <uid>] [-g <gid>] {-d | <cpio_source>} ...
<cpio_source> File list or directory for cpio archive. <cpio_source> File list or directory for cpio archive.
If <cpio_source> is a .cpio file it will be used If <cpio_source> is a .cpio file it will be used
as direct input to initramfs. as direct input to initramfs.
-d Output the default cpio list.
All options except -o and -l may be repeated and are interpreted All options except -o and -l may be repeated and are interpreted
sequentially and immediately. -u and -g states are preserved across sequentially and immediately. -u and -g states are preserved across
@ -43,18 +42,6 @@ field() {
shift $1 ; echo $1 shift $1 ; echo $1
} }
default_initramfs() {
cat <<-EOF >> ${output}
# This is a very simple, default initramfs
dir /dev 0755 0 0
nod /dev/console 0600 0 0 c 5 1
dir /root 0700 0 0
# file /kinit usr/kinit/kinit 0755 0 0
# slink /init kinit 0755 0 0
EOF
}
filetype() { filetype() {
local argv1="$1" local argv1="$1"
@ -263,9 +250,6 @@ while [ $# -gt 0 ]; do
[ "$root_gid" = "-1" ] && root_gid=$(id -g || echo 0) [ "$root_gid" = "-1" ] && root_gid=$(id -g || echo 0)
shift shift
;; ;;
"-d") # display default initramfs list
default_initramfs
;;
"-h") "-h")
usage usage
exit 0 exit 0