diff options
| -rwxr-xr-x | scripts/mkroot.sh | 82 |
1 files changed, 31 insertions, 51 deletions
diff --git a/scripts/mkroot.sh b/scripts/mkroot.sh index 84ae22ef..76c60ed0 100755 --- a/scripts/mkroot.sh +++ b/scripts/mkroot.sh @@ -11,15 +11,13 @@ getcross() { X="$(echo "$CCC/$1"-*cross/bin/"$1"*-cc)"; echo "${X%cc}"; } # assign command line NAME=VALUE args to env vars while [ $# -ne 0 ]; do - X="${1/=*/}" Y="${1#*=}" - [ "${1/=/}" != "$1" ] && eval "export $X=\"\$Y\"" || PKG="$PKG $i" + [ "${1/=/}" != "$1" ] && eval "export ${1/=*/}=\"\${1#*=}\"" || PKG="$PKG $i" shift done -# set up directories (can override most of these paths on cmdline) +# set output and work directories (can override on cmdline) TOP="$PWD/root" -: ${BUILD:=$TOP/build} ${AIRLOCK:=$TOP/airlock} -mkdir -p ${LOG:=$TOP/log} || exit 1 +mkdir -p ${BUILD:=$TOP/build} ${AIRLOCK:=$TOP/airlock} ${LOG:=$TOP/log} ||exit 1 # set CROSS_COMPILE from $CROSS using ccc. Handle "all" w/log, list, and err chk if [ ! -z "$CROSS" ]; then @@ -60,13 +58,12 @@ if [ ! -z "$CROSS_COMPILE" ]; then if [ ! -e "$AIRLOCK/toybox" ]; then announce "airlock" PREFIX="$AIRLOCK" KCONFIG_CONFIG="$TOP"/.airlock CROSS_COMPILE= \ - make clean defconfig toybox install_airlock && - rm "$TOP"/.airlock || exit 1 + make clean defconfig toybox install_airlock && rm "$TOP"/.airlock ||exit 1 fi export PATH="$CROSS_PATH:$AIRLOCK" fi -### Create files and directories +# directory layout mkdir -p "$ROOT"/{etc,tmp,proc,sys,dev,home,mnt,root,usr/{bin,sbin,lib},var} && chmod a+rwxt "$ROOT"/tmp && ln -s usr/{bin,sbin,lib} "$ROOT" || exit 1 @@ -108,46 +105,22 @@ fi EOF chmod +x "$ROOT"/init && -# passwd and group with kernel special accounts (root and nobody) + guest user +# Google's nameserver, passwd+group with special (root/nobody) accounts + guest +echo "nameserver 8.8.8.8" > "$ROOT"/etc/resolv.conf && cat > "$ROOT"/etc/passwd << 'EOF' && root::0:0:root:/root:/bin/sh guest:x:500:500:guest:/home/guest:/bin/sh nobody:x:65534:65534:nobody:/proc/self:/dev/null EOF -echo -e 'root:x:0:\nguest:x:500:\nnobody:x:65534:' > "$ROOT"/etc/group && -# Google's public nameserver. -echo "nameserver 8.8.8.8" > "$ROOT"/etc/resolv.conf || exit 1 +echo -e 'root:x:0:\nguest:x:500:\nnobody:x:65534:' > "$ROOT"/etc/group || exit 1 -# Build toybox announce toybox -make clean && -make $([ -z .config ] && echo defconfig || echo silentoldconfig) && +make clean $([ -z .config ] && echo defconfig || echo silentoldconfig) && LDFLAGS=--static PREFIX="$ROOT" make toybox install || exit 1 -write_miniconfig() -{ - # Generic options for all targets - KCGLOB=EARLY_PRINTK,BINFMT_ELF,BINFMT_SCRIPT,NO_HZ,HIGH_RES_TIMERS,BLK_DEV,BLK_DEV_INITRD,RD_GZIP,BLK_DEV_LOOP,EXT4_FS,EXT4_USE_FOR_EXT2,VFAT_FS,FAT_DEFAULT_UTF8,MISC_FILESYSTEMS,SQUASHFS,SQUASHFS_XATTR,SQUASHFS_ZLIB,DEVTMPFS,DEVTMPFS_MOUNT,TMPFS,TMPFS_POSIX_ACL,NET,PACKET,UNIX,INET,IPV6,NETDEVICES,NET_CORE,NETCONSOLE,ETHERNET - - echo "# make ARCH=$KARCH allnoconfig KCONFIG_ALLCONFIG=$TARGET.miniconf" - echo "# make ARCH=$KARCH -j \$(nproc)" - echo "# boot $VMLINUX" - echo - echo "# CONFIG_EMBEDDED is not set" - - # Expand list of =y symbols - for i in $KCGLOB $KCONF; do - echo "# architecture ${X:-independent}" - sed -E '/^$/d;s/([^,]*)($|,)/CONFIG_\1=y\n/g' <<< "$i" - X=specific - done - echo "$KERNEL_CONFIG" -} - if [ -z "$LINUX" ] || [ ! -d "$LINUX/kernel" ]; then echo 'No $LINUX directory, kernel build skipped.' else - # Which architecture are we building a kernel for? [ -z "$TARGET" ] && TARGET="${CROSS_BASE/-*/}" [ -z "$TARGET" ] && TARGET="$(uname -m)" @@ -218,25 +191,33 @@ else announce "linux-$KARCH" pushd "$LINUX" && make distclean && popd && cp -sfR "$LINUX" "$MYBUILD/linux" && pushd "$MYBUILD/linux" && - write_miniconfig > "$OUTPUT/miniconfig-$TARGET" && - make ARCH=$KARCH allnoconfig KCONFIG_ALLCONFIG="$OUTPUT/miniconfig-$TARGET" || - exit 1 - # Remove stupid kernel defaults that shouldn't be on by default + # Write miniconfig + { echo "# make ARCH=$KARCH allnoconfig KCONFIG_ALLCONFIG=$TARGET.miniconf" + echo -e "# make ARCH=$KARCH -j \$(nproc)\n# boot $VMLINUX\n\n" + echo "# CONFIG_EMBEDDED is not set" + + # Expand list of =y symbols, first generic then architecture-specific + for i in EARLY_PRINTK,BINFMT_ELF,BINFMT_SCRIPT,NO_HZ,HIGH_RES_TIMERS,BLK_DEV,BLK_DEV_INITRD,RD_GZIP,BLK_DEV_LOOP,EXT4_FS,EXT4_USE_FOR_EXT2,VFAT_FS,FAT_DEFAULT_UTF8,MISC_FILESYSTEMS,SQUASHFS,SQUASHFS_XATTR,SQUASHFS_ZLIB,DEVTMPFS,DEVTMPFS_MOUNT,TMPFS,TMPFS_POSIX_ACL,NET,PACKET,UNIX,INET,IPV6,NETDEVICES,NET_CORE,NETCONSOLE,ETHERNET $KCONF ; do + echo "# architecture ${X:-independent}" + sed -E '/^$/d;s/([^,]*)($|,)/CONFIG_\1=y\n/g' <<< "$i" + X=specific + done + echo "$KERNEL_CONFIG" + } > "$OUTPUT/miniconfig-$TARGET" && + make ARCH=$KARCH allnoconfig KCONFIG_ALLCONFIG="$OUTPUT/miniconfig-$TARGET" && + + # Second config pass to remove stupid kernel defaults # See http://lkml.iu.edu/hypermail/linux/kernel/1912.3/03493.html - # And yes, CONFIG_EXPERT forces on CONFIG_DEBUG which adds gratuitous bloat. - sed -e 's/# CONFIG_EXPERT .*/CONFIG_EXPERT=y/' \ - -e "$(sed -E '/^$/d;s@([^,]*)($|,)@/^CONFIG_\1=y/d;$a# CONFIG_\1 is not set/\n@g' <<< VT,SCHED_DEBUG,DEBUG_MISC,X86_DEBUG_FPU)" -i .config && + sed -e 's/# CONFIG_EXPERT .*/CONFIG_EXPERT=y/' -e "$(sed -E -e '/^$/d' \ + -e 's@([^,]*)($|,)@/^CONFIG_\1=y/d;$a# CONFIG_\1 is not set/\n@g' \ + <<< VT,SCHED_DEBUG,DEBUG_MISC,X86_DEBUG_FPU)" -i .config && yes "" | make ARCH=$KARCH oldconfig > /dev/null && + # Build kernel. Copy config, device tree binary, and kernel binary to output make ARCH=$KARCH CROSS_COMPILE="$CROSS_COMPILE" -j $(nproc) && cp .config "$OUTPUT/linux-fullconfig" || exit 1 - - # If we have a device tree binary, save it for QEMU. - if [ ! -z "$DTB" ]; then - cp "$DTB" "$OUTPUT/$(basename "$DTB")" || exit 1 - fi - + [ ! -z "$DTB" ] && { cp "$DTB" "$OUTPUT")" || exit 1 ;} cp "$VMLINUX" "$OUTPUT" && cd .. && rm -rf linux && popd || exit 1 fi @@ -244,5 +225,4 @@ fi for i in $PKG; do announce "$i"; ./$i; done rmdir "$MYBUILD" "$BUILD" 2>/dev/null announce "${CROSS_BASE}root.cpio.gz" -(cd "$ROOT" && find . | cpio -o -H newc | gzip) > \ - "$OUTPUT/${CROSS_BASE}root.cpio.gz" +(cd "$ROOT" && find .|cpio -o -H newc|gzip) > "$OUTPUT/$CROSS_BASE"root.cpio.gz |