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fs/common: Create initial console device

PATCH Superseded Markos Chandras 3 participants 4 messages Nov 5, 2012 – Nov 21, 2012

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Markos Chandras

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PATCH v3 1/1 fs/common: Create initial console device

From: Markos Chandras <[email protected]>

A /dev/console node must be present in rootfs when the Linux kernel boots otherwise the kernel will print the following warning:
"Warning: unable to open an initial console"

This is because when we use an initramfs the /dev directory is not populated at this point. This can cause problems when a program (e.g ldso with early debugging enabled) opens a standard file descriptor for read/write before these descriptors are actually created by the init process later on.

Signed-off-by Markos Chandras <[email protected]>
---
 fs/cpio/cpio.mk |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
fs/cpio/cpio.mk +2 -0
index aa20b41..5533322 100644
@@ -21,6 +21,8 @@ define ROOTFS_CPIO_ADD_INIT
         fi
 endef
 
+PACKAGES_PERMISSIONS_TABLE += /dev/console c 622 0 0 5 1 - - -$(sep)
+
 endif # BR2_ROOTFS_DEVICE_CREATION_STATIC
 
 ROOTFS_CPIO_PRE_GEN_HOOKS += ROOTFS_CPIO_ADD_INIT
Signature · 1 line
1.7.1
#1 lore raw

PATCH v3 1/1 fs/common: Create initial console device

Quoted 6 lines · Markos Chandras

From: Markos Chandras<[email protected]>

A /dev/console node must be present in rootfs when the Linux kernel boots otherwise the kernel will print the following warning:
"Warning: unable to open an initial console"

Quoted 7 lines

This is because when we use an initramfs the /dev directory is not populated at this point. This can cause problems when a program (e.g ldso with early debugging enabled) opens a standard file descriptor for read/write before these descriptors are actually created by the init process later on.

Signed-off-by Markos Chandras<[email protected]>
Acked-by Arnout Vandecappelle (Essensium/Mind) <[email protected]>
Tested-by Arnout Vandecappelle (Essensium/Mind) <[email protected]>

Regards,
Arnout

Signature · 6 lines
Arnout Vandecappelle                               arnout at mind be
Senior Embedded Software Architect                 +32-16-286540
Essensium/Mind                                     http://www.mind.be
G.Geenslaan 9, 3001 Leuven, Belgium                BE 872 984 063 RPR Leuven
LinkedIn profile: http://www.linkedin.com/in/arnoutvandecappelle
GPG fingerprint:  7CB5 E4CC 6C2E EFD4 6E3D A754 F963 ECAB 2450 2F1F
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#2 lore raw

PATCH v3 1/1 fs/common: Create initial console device

Quoted 14 lines · Arnout Vandecappelle
Quoted 13 lines · Markos Chandras

From: Markos Chandras<[email protected]>

A /dev/console node must be present in rootfs when the Linux kernel boots otherwise the kernel will print the following warning:
"Warning: unable to open an initial console"

This is because when we use an initramfs the /dev directory is not populated at this point. This can cause problems when a program (e.g ldso with early debugging enabled) opens a standard file descriptor for read/write before these descriptors are actually created by the init process later on.

Quoted 9 lines
Quoted 1 line
Signed-off-by Markos Chandras<[email protected]>
Acked-by Arnout Vandecappelle (Essensium/Mind) <[email protected]>
Tested-by Arnout Vandecappelle (Essensium/Mind) <[email protected]>

Regards,
Arnout

Hi Arnout,

Thanks. Lets see if this will make it to the final release as this warning is a bit annoying :)

Signature · 2 lines
Regards,
Markos
#3 lore raw

PATCH v3 1/1 fs/common: Create initial console device

Quoted 8 lines
Quoted 8 lines
Quoted 1 line
Quoted 1 line
Quoted 1 line

"Markos" == Markos Chandras <[email protected]> writes:

Acked-by Arnout Vandecappelle (Essensium/Mind) <[email protected]>
Tested-by Arnout Vandecappelle (Essensium/Mind) <[email protected]>

Regards,
Arnout

Markos> Hi Arnout,

Markos> Thanks. Lets see if this will make it to the final release as this Markos> warning is a bit annoying :)

Committed, thanks.

Signature · 1 line
Bye, Peter Korsgaard