Re: [gentoo-user] /dev/shm mode 1777

[Joseph <syscon780@gmail.com>]

On 10/03/14 23:00, Mike Gilbert wrote:
>On Fri, Oct 3, 2014 at 10:22 PM, Joseph <syscon780@gmail.com> wrote:
>> I'm getting an error message during emerge:
>> * configure has detected that the sem_open function is broken.
>> * Please ensure that /dev/shm is mounted as a tmpfs with mode 1777.
>> * ERROR: dev-lang/python-3.3.5-r1::gentoo failed (configure phase):
>>
>> my /dev/shm is mounted as drwxr-xr-x 17 root root          4020 Oct  3 08:57
>> shm
>>
>> and it should be:
>> drwxrwxrwt  2 root root           100 Sep 29 09:25 shm
>>
>> I've already change in fstab:
>> from:
>> shm                     /dev/shm        devtmpfs        nodev,nosuid,noexec
>> 0 0
>>
>> to:
>> shm                     /dev/shm        tmpfs
>> defaults,nodev,nosuid,mode=1777 0 0
>>
>> Is it OK to run:
>> umount shm
>> mount shm
>>
>> This is a remount system, so I want to make sure I'm not making a mistake.
>>
>
>Yes, that should be fairly safe to run. The only risk is if you have
>some application running which has files open on it; but umount should
>give you an error in that case.
>
>Also, you can/should remove that fstab entry entirely once you have
>remounted it; both openrc and systemd will automatically mount
>/dev/shm with proper permissions if it is missing from fstab.

Will it?
In my kernel confg I have:

grep CONFIG_DEVTMPFS  /usr/src/linux/.config 
CONFIG_DEVTMPFS=y
# CONFIG_DEVTMPFS_MOUNT is not set

should I set "CONFIG_DEVTMPFS_MOUNT=y"

-- 
Joseph