08fc0a47e1
When using systemd, the policy in Buildroot is to use a merged /usr
(see c5bd8af6, "system: add options for /bin /sbin and /lib to be
symlinks into /usr" for more info). So, we apply a few tricks in some
packages to account for the merged /usr case.
However, when using a custom skeleton, we have no say in how that
skeleton is organised, so it may well have a split /usr. In that case,
our little tricks might not work as expected.
So, when the user uses a custom skeleton and wants systemd as an init
system, we must check that the custom skeleton is setup with a merged
/usr.
We do that by checking that each pair of {/lib,/usr/lib} {/bin,/usr/bin}
and {/sbin,/usr/sbin} have the same inode numbers, i.e. /lib must have
the same inode number as /usr/lib (and so on...). When a pair does not
share the same inode number, this is not a merged /usr and we abort.
We implement that check with make constructs, so it is done very early
in the build process, and we can abort early if need be.
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Maxime Hadjinlian <maxime.hadjinlian@gmail.com>
Cc: Peter Korsgaard <jacmet@uclibc.org>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
216 lines
7.7 KiB
Makefile
216 lines
7.7 KiB
Makefile
################################################################################
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#
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# skeleton
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#
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################################################################################
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# source included in buildroot
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SKELETON_SOURCE =
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# The skeleton can't depend on the toolchain, since all packages depends on the
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# skeleton and the toolchain is a target package, as is skeleton.
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# Hence, skeleton would depends on the toolchain and the toolchain would depend
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# on skeleton.
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SKELETON_ADD_TOOLCHAIN_DEPENDENCY = NO
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ifeq ($(BR2_ROOTFS_SKELETON_CUSTOM),y)
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SKELETON_PATH = $(call qstrip,$(BR2_ROOTFS_SKELETON_CUSTOM_PATH))
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ifeq ($(BR2_ROOTFS_MERGED_USR),y)
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# Ensure the user has prepared a merged /usr.
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#
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# Extract the inode numbers for all of those directories. In case any is
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# a symlink, we want to get the inode of the pointed-to directory, so we
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# append '/.' to be sure we get the target directory. Since the symlinks
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# can be anyway (/bin -> /usr/bin or /usr/bin -> /bin), we do that for
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# all of them.
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#
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SKELETON_LIB_INODE = $(shell stat -c '%i' $(SKELETON_PATH)/lib/.)
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SKELETON_BIN_INODE = $(shell stat -c '%i' $(SKELETON_PATH)/bin/.)
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SKELETON_SBIN_INODE = $(shell stat -c '%i' $(SKELETON_PATH)/sbin/.)
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SKELETON_USR_LIB_INODE = $(shell stat -c '%i' $(SKELETON_PATH)/usr/lib/.)
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SKELETON_USR_BIN_INODE = $(shell stat -c '%i' $(SKELETON_PATH)/usr/bin/.)
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SKELETON_USR_SBIN_INODE = $(shell stat -c '%i' $(SKELETON_PATH)/usr/sbin/.)
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ifneq ($(SKELETON_LIB_INODE),$(SKELETON_USR_LIB_INODE))
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SKELETON_CUSTOM_NOT_MERGED_USR += /lib
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endif
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ifneq ($(SKELETON_BIN_INODE),$(SKELETON_USR_BIN_INODE))
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SKELETON_CUSTOM_NOT_MERGED_USR += /bin
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endif
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ifneq ($(SKELETON_SBIN_INODE),$(SKELETON_USR_SBIN_INODE))
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SKELETON_CUSTOM_NOT_MERGED_USR += /sbin
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endif
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ifneq ($(SKELETON_CUSTOM_NOT_MERGED_USR),)
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$(error Use of systemd as an init system requires a merged /usr. \
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However, the custom skeleton in $(SKELETON_PATH) is not \
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using a merged /usr for the following directories: \
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$(SKELETON_CUSTOM_NOT_MERGED_USR))
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endif
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endif # merged /usr
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else # ! custom skeleton
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SKELETON_PATH = system/skeleton
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ifeq ($(BR2_ROOTFS_MERGED_USR),y)
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define SKELETON_USR_SYMLINKS_OR_DIRS
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ln -snf usr/bin $(TARGET_DIR)/bin
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ln -snf usr/sbin $(TARGET_DIR)/sbin
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ln -snf usr/lib $(TARGET_DIR)/lib
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endef
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else
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define SKELETON_USR_SYMLINKS_OR_DIRS
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$(INSTALL) -d -m 0755 $(TARGET_DIR)/bin
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$(INSTALL) -d -m 0755 $(TARGET_DIR)/sbin
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$(INSTALL) -d -m 0755 $(TARGET_DIR)/lib
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endef
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endif
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endif # ! custom skeleton
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define SKELETON_INSTALL_TARGET_CMDS
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rsync -a --ignore-times $(SYNC_VCS_EXCLUSIONS) \
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--chmod=u=rwX,go=rX --exclude .empty --exclude '*~' \
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$(SKELETON_PATH)/ $(TARGET_DIR)/
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$(SKELETON_USR_SYMLINKS_OR_DIRS)
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ln -snf lib $(TARGET_DIR)/$(LIB_SYMLINK)
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ln -snf lib $(TARGET_DIR)/usr/$(LIB_SYMLINK)
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$(INSTALL) -m 0644 support/misc/target-dir-warning.txt \
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$(TARGET_DIR_WARNING_FILE)
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endef
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SKELETON_TARGET_GENERIC_HOSTNAME = $(call qstrip,$(BR2_TARGET_GENERIC_HOSTNAME))
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SKELETON_TARGET_GENERIC_ISSUE = $(call qstrip,$(BR2_TARGET_GENERIC_ISSUE))
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SKELETON_TARGET_GENERIC_ROOT_PASSWD = $(call qstrip,$(BR2_TARGET_GENERIC_ROOT_PASSWD))
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SKELETON_TARGET_GENERIC_PASSWD_METHOD = $(call qstrip,$(BR2_TARGET_GENERIC_PASSWD_METHOD))
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SKELETON_TARGET_GENERIC_BIN_SH = $(call qstrip,$(BR2_SYSTEM_BIN_SH))
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SKELETON_TARGET_GENERIC_GETTY_PORT = $(call qstrip,$(BR2_TARGET_GENERIC_GETTY_PORT))
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SKELETON_TARGET_GENERIC_GETTY_BAUDRATE = $(call qstrip,$(BR2_TARGET_GENERIC_GETTY_BAUDRATE))
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SKELETON_TARGET_GENERIC_GETTY_TERM = $(call qstrip,$(BR2_TARGET_GENERIC_GETTY_TERM))
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SKELETON_TARGET_GENERIC_GETTY_OPTIONS = $(call qstrip,$(BR2_TARGET_GENERIC_GETTY_OPTIONS))
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ifneq ($(SKELETON_TARGET_GENERIC_HOSTNAME),)
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define SYSTEM_HOSTNAME
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mkdir -p $(TARGET_DIR)/etc
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echo "$(SKELETON_TARGET_GENERIC_HOSTNAME)" > $(TARGET_DIR)/etc/hostname
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$(SED) '$$a \127.0.1.1\t$(SKELETON_TARGET_GENERIC_HOSTNAME)' \
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-e '/^127.0.1.1/d' $(TARGET_DIR)/etc/hosts
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endef
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TARGET_FINALIZE_HOOKS += SYSTEM_HOSTNAME
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endif
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ifneq ($(SKELETON_TARGET_GENERIC_ISSUE),)
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define SYSTEM_ISSUE
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mkdir -p $(TARGET_DIR)/etc
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echo "$(SKELETON_TARGET_GENERIC_ISSUE)" > $(TARGET_DIR)/etc/issue
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endef
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TARGET_FINALIZE_HOOKS += SYSTEM_ISSUE
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endif
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define SET_NETWORK_LOCALHOST
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( \
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echo "# interface file auto-generated by buildroot"; \
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echo ; \
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echo "auto lo"; \
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echo "iface lo inet loopback"; \
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) > $(TARGET_DIR)/etc/network/interfaces
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endef
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NETWORK_DHCP_IFACE = $(call qstrip,$(BR2_SYSTEM_DHCP))
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ifneq ($(NETWORK_DHCP_IFACE),)
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define SET_NETWORK_DHCP
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( \
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echo ; \
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echo "auto $(NETWORK_DHCP_IFACE)"; \
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echo "iface $(NETWORK_DHCP_IFACE) inet dhcp"; \
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echo " wait-delay 15"; \
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) >> $(TARGET_DIR)/etc/network/interfaces
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endef
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endif
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define SET_NETWORK
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mkdir -p $(TARGET_DIR)/etc/network/
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$(SET_NETWORK_LOCALHOST)
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$(SET_NETWORK_DHCP)
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endef
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TARGET_FINALIZE_HOOKS += SET_NETWORK
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# The TARGET_FINALIZE_HOOKS must be sourced only if the users choose to use the
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# default skeleton.
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ifeq ($(BR2_ROOTFS_SKELETON_DEFAULT),y)
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ifeq ($(BR2_TARGET_ENABLE_ROOT_LOGIN),y)
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ifeq ($(SKELETON_TARGET_GENERIC_ROOT_PASSWD),)
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SYSTEM_ROOT_PASSWORD =
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else ifneq ($(filter $$1$$% $$5$$% $$6$$%,$(SKELETON_TARGET_GENERIC_ROOT_PASSWD)),)
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SYSTEM_ROOT_PASSWORD = '$(SKELETON_TARGET_GENERIC_ROOT_PASSWD)'
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else
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SKELETON_DEPENDENCIES += host-mkpasswd
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# This variable will only be evaluated in the finalize stage, so we can
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# be sure that host-mkpasswd will have already been built by that time.
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SYSTEM_ROOT_PASSWORD = "`$(MKPASSWD) -m "$(SKELETON_TARGET_GENERIC_PASSWD_METHOD)" "$(SKELETON_TARGET_GENERIC_ROOT_PASSWD)"`"
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endif
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else # !BR2_TARGET_ENABLE_ROOT_LOGIN
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SYSTEM_ROOT_PASSWORD = "*"
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endif
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define SKELETON_SYSTEM_SET_ROOT_PASSWD
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$(SED) s,^root:[^:]*:,root:$(SYSTEM_ROOT_PASSWORD):, $(TARGET_DIR)/etc/shadow
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endef
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TARGET_FINALIZE_HOOKS += SKELETON_SYSTEM_SET_ROOT_PASSWD
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ifeq ($(BR2_SYSTEM_BIN_SH_NONE),y)
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define SKELETON_SYSTEM_BIN_SH
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rm -f $(TARGET_DIR)/bin/sh
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endef
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else
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define SKELETON_SYSTEM_BIN_SH
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ln -sf $(SKELETON_TARGET_GENERIC_BIN_SH) $(TARGET_DIR)/bin/sh
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endef
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endif
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TARGET_FINALIZE_HOOKS += SKELETON_SYSTEM_BIN_SH
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ifeq ($(BR2_TARGET_GENERIC_GETTY),y)
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ifeq ($(BR2_INIT_SYSV),y)
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# In sysvinit inittab, the "id" must not be longer than 4 bytes, so we
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# skip the "tty" part and keep only the remaining.
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define SKELETON_SYSTEM_GETTY
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$(SED) '/# GENERIC_SERIAL$$/s~^.*#~$(shell echo $(SKELETON_TARGET_GENERIC_GETTY_PORT) | tail -c+4)::respawn:/sbin/getty -L $(SKELETON_TARGET_GENERIC_GETTY_OPTIONS) $(SKELETON_TARGET_GENERIC_GETTY_PORT) $(SKELETON_TARGET_GENERIC_GETTY_BAUDRATE) $(SKELETON_TARGET_GENERIC_GETTY_TERM) #~' \
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$(TARGET_DIR)/etc/inittab
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endef
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else ifeq ($(BR2_INIT_BUSYBOX),y)
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# Add getty to busybox inittab
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define SKELETON_SYSTEM_GETTY
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$(SED) '/# GENERIC_SERIAL$$/s~^.*#~$(SKELETON_TARGET_GENERIC_GETTY_PORT)::respawn:/sbin/getty -L $(SKELETON_TARGET_GENERIC_GETTY_OPTIONS) $(SKELETON_TARGET_GENERIC_GETTY_PORT) $(SKELETON_TARGET_GENERIC_GETTY_BAUDRATE) $(SKELETON_TARGET_GENERIC_GETTY_TERM) #~' \
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$(TARGET_DIR)/etc/inittab
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endef
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endif
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TARGET_FINALIZE_HOOKS += SKELETON_SYSTEM_GETTY
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endif
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ifeq ($(BR2_INIT_BUSYBOX)$(BR2_INIT_SYSV),y)
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ifeq ($(BR2_TARGET_GENERIC_REMOUNT_ROOTFS_RW),y)
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# Find commented line, if any, and remove leading '#'s
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define SKELETON_SYSTEM_REMOUNT_RW
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$(SED) '/^#.*-o remount,rw \/$$/s~^#\+~~' $(TARGET_DIR)/etc/inittab
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endef
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else
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# Find uncommented line, if any, and add a leading '#'
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define SKELETON_SYSTEM_REMOUNT_RW
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$(SED) '/^[^#].*-o remount,rw \/$$/s~^~#~' $(TARGET_DIR)/etc/inittab
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endef
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endif
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TARGET_FINALIZE_HOOKS += SKELETON_SYSTEM_REMOUNT_RW
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endif # BR2_INIT_BUSYBOX || BR2_INIT_SYSV
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endif # BR2_ROOTFS_SKELETON_DEFAULT
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$(eval $(generic-package))
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