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openwrt/package/base-files/Makefile
Thibaut VARÈNE 7557e7f267 package/base-files: caldata: work around dd's limitation 
tl;dr: dd will silently truncate the output if reading from special
files (e.g. sysfs attributes) with a too large bs parameter.

This problem was exposed on some RouterBOARD ipq40xx devices which use a
caldata payload which is larger than PAGE_SIZE, contrary to all other
currently supported RouterBOARD devices: the caldata would fail to
properly load with the current scripts.

Background: dd doesn't seem to correctly handle read() results that
return less than requested data. sysfs attributes have a kernel exchange
buffer which is at most PAGE_SIZE big, so only 1 page can be read() at a
time. In this case, if bs is larger than PAGE_SIZE, dd will silently
truncate blocks to PAGE_SIZE. With the current scripts using bs=<size>
count=1, the data is truncated to PAGE_SIZE as soon as the requested
<size> exceeds this value.

This commit works around this problem by using `cat` in the caldata
routines that can read from a file (routines that read from mtd devices
are untouched). cat correctly handles partial read requests. The output
is then piped to dd with the same parameters as before, to ensure that
the resulting file remains exactly the same.

This is a simple workaround, the downside is that it uses a pipe and one
more executable, and therefore has a larger memory footprint and is
slower. This is deemed acceptable considering these routines are only
used at boot time.

Tested-by: Robert Marko <robimarko@gmail.com>
Signed-off-by: Thibaut VARÈNE <hacks@slashdirt.org>
2020-05-28 11:22:22 +02:00

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#
# Copyright (C) 2007-2016 OpenWrt.org
# Copyright (C) 2010 Vertical Communications
#
# This is free software, licensed under the GNU General Public License v2.
# See /LICENSE for more information.
#
include $(TOPDIR)/rules.mk
include $(INCLUDE_DIR)/kernel.mk
include $(INCLUDE_DIR)/version.mk
include $(INCLUDE_DIR)/feeds.mk
PKG_NAME:=base-files
PKG_RELEASE:=222
PKG_FLAGS:=nonshared
PKG_FILE_DEPENDS:=$(PLATFORM_DIR)/ $(GENERIC_PLATFORM_DIR)/base-files/
PKG_BUILD_DEPENDS:=usign/host ucert/host
PKG_LICENSE:=GPL-2.0
# Extend depends from version.mk
PKG_CONFIG_DEPENDS += \
CONFIG_SIGNED_PACKAGES CONFIG_TARGET_INIT_PATH CONFIG_TARGET_PREINIT_DISABLE_FAILSAFE \
CONFIG_NAND_SUPPORT \
CONFIG_CLEAN_IPKG \
CONFIG_PER_FEED_REPO \
$(foreach feed,$(FEEDS_AVAILABLE),CONFIG_FEED_$(feed))
include $(INCLUDE_DIR)/package.mk
ifneq ($(DUMP),1)
STAMP_CONFIGURED:=$(strip $(STAMP_CONFIGURED))_$(shell echo $(CONFIG_TARGET_INIT_PATH) | mkhash md5)
TARGET:=-$(BOARD)
endif
define Package/base-files
SECTION:=base
CATEGORY:=Base system
DEPENDS:=+netifd +libc +procd +jsonfilter +SIGNED_PACKAGES:usign +SIGNED_PACKAGES:openwrt-keyring +NAND_SUPPORT:ubi-utils +fstools +fwtool
TITLE:=Base filesystem for OpenWrt
URL:=http://openwrt.org/
VERSION:=$(PKG_RELEASE)-$(REVISION)
endef
define Package/urandom-seed
SECTION:=base
CATEGORY:=Base system
DEPENDS:=+libc +ubox-getrandom
TITLE:=/etc/urandom.seed handling for OpenWrt
URL:=http://openwrt.org/
VERSION:=$(PKG_RELEASE)-$(REVISION)
endef
define Package/base-files/conffiles
/etc/config/
/etc/config/network
/etc/config/system
/etc/crontabs/
/etc/dropbear/
/etc/ethers
/etc/group
/etc/hosts
/etc/inittab
/etc/iproute2/rt_protos
/etc/iproute2/rt_tables
/etc/passwd
/etc/profile
/etc/profile.d
/etc/protocols
/etc/rc.local
/etc/services
/etc/shadow
/etc/shells
/etc/shinit
/etc/sysctl.conf
/etc/sysupgrade.conf
$(call $(TARGET)/conffiles)
endef
define Package/base-files/description
This package contains a base filesystem and system scripts for OpenWrt.
endef
define ImageConfigOptions
mkdir -p $(1)/lib/preinit
echo 'pi_suppress_stderr="$(CONFIG_TARGET_PREINIT_SUPPRESS_STDERR)"' >$(1)/lib/preinit/00_preinit.conf
echo 'fs_failsafe_wait_timeout=$(if $(CONFIG_TARGET_PREINIT_TIMEOUT),$(CONFIG_TARGET_PREINIT_TIMEOUT),2)' >>$(1)/lib/preinit/00_preinit.conf
echo 'pi_init_path="$(TARGET_INIT_PATH)"' >>$(1)/lib/preinit/00_preinit.conf
echo 'pi_init_env=$(if $(CONFIG_TARGET_INIT_ENV),$(CONFIG_TARGET_INIT_ENV),"")' >>$(1)/lib/preinit/00_preinit.conf
echo 'pi_init_cmd=$(if $(CONFIG_TARGET_INIT_CMD),$(CONFIG_TARGET_INIT_CMD),"/sbin/init")' >>$(1)/lib/preinit/00_preinit.conf
echo 'pi_init_suppress_stderr="$(CONFIG_TARGET_INIT_SUPPRESS_STDERR)"' >>$(1)/lib/preinit/00_preinit.conf
echo 'pi_ifname=$(if $(CONFIG_TARGET_PREINIT_IFNAME),$(CONFIG_TARGET_PREINIT_IFNAME),"")' >>$(1)/lib/preinit/00_preinit.conf
echo 'pi_ip=$(if $(CONFIG_TARGET_PREINIT_IP),$(CONFIG_TARGET_PREINIT_IP),"192.168.1.1")' >>$(1)/lib/preinit/00_preinit.conf
echo 'pi_netmask=$(if $(CONFIG_TARGET_PREINIT_NETMASK),$(CONFIG_TARGET_PREINIT_NETMASK),"255.255.255.0")' >>$(1)/lib/preinit/00_preinit.conf
echo 'pi_broadcast=$(if $(CONFIG_TARGET_PREINIT_BROADCAST),$(CONFIG_TARGET_PREINIT_BROADCAST),"192.168.1.255")' >>$(1)/lib/preinit/00_preinit.conf
echo 'pi_preinit_net_messages="$(CONFIG_TARGET_PREINIT_SHOW_NETMSG)"' >>$(1)/lib/preinit/00_preinit.conf
echo 'pi_preinit_no_failsafe_netmsg="$(CONFIG_TARGET_PREINIT_SUPPRESS_FAILSAFE_NETMSG)"' >>$(1)/lib/preinit/00_preinit.conf
echo 'pi_preinit_no_failsafe="$(CONFIG_TARGET_PREINIT_DISABLE_FAILSAFE)"' >>$(1)/lib/preinit/00_preinit.conf
endef
define Build/Prepare
mkdir -p $(PKG_BUILD_DIR)
endef
define Build/Compile/Default
endef
Build/Compile = $(Build/Compile/Default)
ifdef CONFIG_SIGNED_PACKAGES
define Build/Configure
[ -s $(BUILD_KEY) -a -s $(BUILD_KEY).pub ] || \
$(STAGING_DIR_HOST)/bin/usign -G -s $(BUILD_KEY) -p $(BUILD_KEY).pub -c "Local build key"
[ -s $(BUILD_KEY).ucert ] || \
$(STAGING_DIR_HOST)/bin/ucert -I -c $(BUILD_KEY).ucert -p $(BUILD_KEY).pub -s $(BUILD_KEY)
endef
ifndef CONFIG_BUILDBOT
define Package/base-files/install-key
mkdir -p $(1)/etc/opkg/keys
$(CP) $(BUILD_KEY).pub $(1)/etc/opkg/keys/`$(STAGING_DIR_HOST)/bin/usign -F -p $(BUILD_KEY).pub`
endef
endif
endif
ifeq ($(CONFIG_NAND_SUPPORT),)
define Package/base-files/nand-support
rm -f $(1)/lib/upgrade/nand.sh
endef
endif
define Package/base-files/install
$(CP) ./files/* $(1)/
$(Package/base-files/install-key)
$(Package/base-files/nand-support)
if [ -d $(GENERIC_PLATFORM_DIR)/base-files/. ]; then \
$(CP) $(GENERIC_PLATFORM_DIR)/base-files/* $(1)/; \
fi
if [ -d $(PLATFORM_DIR)/base-files/. ]; then \
$(CP) $(PLATFORM_DIR)/base-files/* $(1)/; \
fi
$(if $(filter-out $(PLATFORM_DIR),$(PLATFORM_SUBDIR)), \
if [ -d $(PLATFORM_SUBDIR)/base-files/. ]; then \
$(CP) $(PLATFORM_SUBDIR)/base-files/* $(1)/; \
fi; \
)
$(VERSION_SED_SCRIPT) \
$(1)/etc/banner \
$(1)/etc/openwrt_version \
$(1)/usr/lib/os-release
$(VERSION_SED_SCRIPT) \
$(1)/etc/openwrt_release \
$(1)/etc/device_info \
$(1)/usr/lib/os-release
$(SED) "s#%PATH%#$(TARGET_INIT_PATH)#g" \
$(1)/sbin/hotplug-call \
$(1)/etc/preinit \
$(1)/etc/profile
mkdir -p $(1)/CONTROL
mkdir -p $(1)/dev
mkdir -p $(1)/etc/config
mkdir -p $(1)/etc/crontabs
mkdir -p $(1)/etc/rc.d
mkdir -p $(1)/overlay
mkdir -p $(1)/lib/firmware
$(if $(LIB_SUFFIX),-$(LN) lib $(1)/lib$(LIB_SUFFIX))
mkdir -p $(1)/mnt
mkdir -p $(1)/proc
mkdir -p $(1)/tmp
mkdir -p $(1)/usr/lib
$(if $(LIB_SUFFIX),-$(LN) lib $(1)/usr/lib$(LIB_SUFFIX))
mkdir -p $(1)/usr/bin
mkdir -p $(1)/sys
mkdir -p $(1)/www
mkdir -p $(1)/root
$(LN) /proc/mounts $(1)/etc/mtab
rm -f $(1)/var
$(LN) tmp $(1)/var
mkdir -p $(1)/etc
$(LN) /tmp/resolv.conf /tmp/TZ /tmp/localtime $(1)/etc/
chmod 0600 $(1)/etc/shadow
chmod 1777 $(1)/tmp
$(call ImageConfigOptions,$(1))
$(call Package/base-files/install-target,$(1))
for conffile in $(1)/etc/config/*; do \
if [ -f "$$$$conffile" ]; then \
grep "$$$${conffile##$(1)}" $(1)/CONTROL/conffiles || \
echo "$$$${conffile##$(1)}" >> $(1)/CONTROL/conffiles; \
fi \
done
$(if $(CONFIG_INCLUDE_CONFIG), \
echo -e "# Build configuration for board $(BOARD)/$(SUBTARGET)/$(PROFILE)\n" >$(1)/etc/build.config; \
cat $(BIN_DIR)/config.buildinfo >>$(1)/etc/build.config; \
cat $(BIN_DIR)/feeds.buildinfo >>$(1)/etc/build.feeds; \
cat $(BIN_DIR)/version.buildinfo >>$(1)/etc/build.version)
$(if $(CONFIG_CLEAN_IPKG),, \
mkdir -p $(1)/etc/opkg; \
$(call FeedSourcesAppend,$(1)/etc/opkg/distfeeds.conf); \
$(VERSION_SED_SCRIPT) $(1)/etc/opkg/distfeeds.conf)
$(if $(CONFIG_IPK_FILES_CHECKSUMS),, \
rm -f $(1)/sbin/pkg_check)
endef
ifneq ($(DUMP),1)
-include $(PLATFORM_DIR)/base-files.mk
-include $(PLATFORM_SUBDIR)/base-files.mk
endif
$(eval $(call BuildPackage,base-files))
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