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authorStefan Agner <stefan@agner.ch>2016-09-04 13:25:55 -0700
committerRichard Purdie <richard.purdie@linuxfoundation.org>2016-09-08 00:31:36 +0100
commit82de49b899bca915259ea7ea149f50e1401c2426 (patch)
tree7b629c04ed1bdf018668d8a4c2eaea160ade2d0e
parentf3a50f89a217014c0926498e99e62c617a8a4cae (diff)
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busybox: avoid circular dependency when using initramfs
The kernel does not automatically mount devtmpfs when using initramfs based booting (even when using CONFIG_DEVTMPFS_MOUNT). If the rootfs is built with USE_DEVFS=1 (which is the default), the system ends up with a completely empty /dev to begin with. Busybox uses the first entry in inittab slightly different than other init systems: <id>: WARNING: This field has a non-traditional meaning for BusyBox init! The id field is used by BusyBox init to specify the controlling tty for the specified process to run on. The contents of this field are appended to "/dev/" and used as-is. Since /dev/null is not there yet, Busybox throws errors instead of executing the commands, and hence never mounts devtmpfs: init started: BusyBox v1.24.1 (2016-09-04 11:53:14 PDT) can't open /dev/null: No such file or directory can't open /dev/null: No such file or directory can't open /dev/null: No such file or directory can't open /dev/null: No such file or directory can't open /dev/null: No such file or directory can't open /dev/null: No such file or directory can't open /dev/null: No such file or directory Avoid this circular dependency by not specifing <id>. With that Busybox ends up using the stdio of the init process and executes the inittab just fine. Signed-off-by: Stefan Agner <stefan@agner.ch> Signed-off-by: Ross Burton <ross.burton@intel.com>
-rw-r--r--meta/recipes-core/busybox/files/inittab14
1 files changed, 7 insertions, 7 deletions
diff --git a/meta/recipes-core/busybox/files/inittab b/meta/recipes-core/busybox/files/inittab
index bfec4a7743..2bc831c7c6 100644
--- a/meta/recipes-core/busybox/files/inittab
+++ b/meta/recipes-core/busybox/files/inittab
@@ -1,13 +1,13 @@
# This is run first except when booting in single-user mode.
# Startup the system
-null::sysinit:/bin/mount -t proc proc /proc
-null::sysinit:/bin/mount -t sysfs sysfs /sys
-null::sysinit:/bin/mount -t devtmpfs devtmpfs /dev
-null::sysinit:/bin/mount -o remount,rw /
-null::sysinit:/bin/mkdir -p /dev/pts
-null::sysinit:/bin/mount -t devpts devpts /dev/pts
-null::sysinit:/bin/mount -a
+::sysinit:/bin/mount -t proc proc /proc
+::sysinit:/bin/mount -t sysfs sysfs /sys
+::sysinit:/bin/mount -t devtmpfs devtmpfs /dev
+::sysinit:/bin/mount -o remount,rw /
+::sysinit:/bin/mkdir -p /dev/pts
+::sysinit:/bin/mount -t devpts devpts /dev/pts
+::sysinit:/bin/mount -a
::sysinit:/etc/init.d/rcS