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fs/skeleton: allow rootfs not to be remounted read-write

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[Peter: prefix option with TARGET_GENERIC_]
Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
Acked-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
This commit is contained in:
Luca Ceresoli 2011-07-03 12:56:03 +02:00 committed by Peter Korsgaard
parent c917550361
commit 36b4b852ee
4 changed files with 26 additions and 2 deletions
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2
fs/skeleton/etc/inittab
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@ -15,7 +15,7 @@
# Startup the system
null::sysinit:/bin/mount -t proc proc /proc
null::sysinit:/bin/mount -o remount,rw /
null::sysinit:/bin/mount -o remount,rw / # REMOUNT_ROOTFS_RW
null::sysinit:/bin/mkdir -p /dev/pts
null::sysinit:/bin/mkdir -p /dev/shm
null::sysinit:/bin/mount -a

2
package/sysvinit/inittab
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@ -5,7 +5,7 @@
id:1:initdefault:
proc::sysinit:/bin/mount -t proc proc /proc
rwmo::sysinit:/bin/mount -o remount,rw /
rwmo::sysinit:/bin/mount -o remount,rw / # REMOUNT_ROOTFS_RW
dpts::sysinit:/bin/mkdir -p /dev/pts
moun::sysinit:/bin/mount -a
host::sysinit:/bin/hostname -F /etc/hostname

11
target/generic/Config.in
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@ -109,6 +109,17 @@ config BR2_TARGET_GENERIC_GETTY_BAUDRATE
default "57600" if BR2_TARGET_GENERIC_GETTY_BAUDRATE_57600
default "115200" if BR2_TARGET_GENERIC_GETTY_BAUDRATE_115200
config BR2_TARGET_GENERIC_REMOUNT_ROOTFS_RW
bool "remount root filesystem read-write during boot"
default y
help
The root filesystem is typically mounted read-only at boot.
By default, buildroot remounts it in read-write mode early during the
boot process.
Say no here if you would rather like your root filesystem to remain
read-only.
If unsure, say Y.
endif # BR2_ROOTFS_SKELETON_DEFAULT
config BR2_ROOTFS_POST_BUILD_SCRIPT

13
target/generic/Makefile.in
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@ -23,6 +23,14 @@ target-generic-getty-sysvinit:
$(SED) '/# GENERIC_SERIAL$$/s~^.*#~$(shell echo $(TARGET_GENERIC_GETTY) | tail -c+4)::respawn:/sbin/getty -L $(TARGET_GENERIC_GETTY) $(TARGET_GENERIC_GETTY_BAUDRATE) vt100 #~' \
$(TARGET_DIR)/etc/inittab
# Find commented line, if any, and remove leading '#'s
target-generic-do-remount-rw:
$(SED) '/^#.*# REMOUNT_ROOTFS_RW$$/s~^#\+~~' $(TARGET_DIR)/etc/inittab
# Find uncommented line, if any, and add a leading '#'
target-generic-dont-remount-rw:
$(SED) '/^[^#].*# REMOUNT_ROOTFS_RW$$/s~^~#~' $(TARGET_DIR)/etc/inittab
ifneq ($(TARGET_GENERIC_HOSTNAME),)
TARGETS += target-generic-hostname
endif
@ -37,4 +45,9 @@ TARGETS += target-generic-getty-sysvinit
else
TARGETS += target-generic-getty-busybox
endif
ifeq ($(BR2_TARGET_GENERIC_REMOUNT_ROOTFS_RW),y)
TARGETS += target-generic-do-remount-rw
else
TARGETS += target-generic-dont-remount-rw
endif
endif