[gentoo-user] fstab cleanup

[gentoo-user] fstab cleanup

[Stefan G. Weichinger]

Do I still need these lines .. especially with a modern
systemd/gnome3-environment?

->

# glibc 2.2 and above expects tmpfs to be mounted at /dev/shm for
# POSIX shared memory (shm_open, shm_unlink).
# (tmpfs is a dynamically expandable/shrinkable ramdisk, and will
#  use almost no memory if not populated with files)
tmpfs                   /dev/shm        tmpfs
nodev,nosuid,noexec     0 0


/dev/cdrw               /media/cdrecorder       auto
user,exec,noauto,managed 0 0

?

Re: [gentoo-user] fstab cleanup

[Tom H]

On Wed, May 21, 2014 at 6:32 AM, Stefan G. Weichinger <lists@xunil.at> wrote:
>
> Do I still need these lines .. especially with a modern
> systemd/gnome3-environment?
>
> # glibc 2.2 and above expects tmpfs to be mounted at /dev/shm for
> # POSIX shared memory (shm_open, shm_unlink).
> # (tmpfs is a dynamically expandable/shrinkable ramdisk, and will
> #  use almost no memory if not populated with files)
> tmpfs                   /dev/shm        tmpfs
> nodev,nosuid,noexec     0 0
>
>
> /dev/cdrw               /media/cdrecorder       auto
> user,exec,noauto,managed 0 0

From "src/core/mount-setup.c":

{ "tmpfs",      "/dev/shm",                  "tmpfs",
"mode=1777", MS_NOSUID|MS_NODEV|MS_STRICTATIME, NULL,
MNT_FATAL|MNT_IN_CONTAINER },

Re: [gentoo-user] fstab cleanup

[Stefan G. Weichinger]

Am 21.05.2014 15:31, schrieb Tom H:
> On Wed, May 21, 2014 at 6:32 AM, Stefan G. Weichinger <lists@xunil.at> wrote:
>>
>> Do I still need these lines .. especially with a modern
>> systemd/gnome3-environment?
>>
>> # glibc 2.2 and above expects tmpfs to be mounted at /dev/shm for
>> # POSIX shared memory (shm_open, shm_unlink).
>> # (tmpfs is a dynamically expandable/shrinkable ramdisk, and will
>> #  use almost no memory if not populated with files)
>> tmpfs                   /dev/shm        tmpfs
>> nodev,nosuid,noexec     0 0
>>
>>
>> /dev/cdrw               /media/cdrecorder       auto
>> user,exec,noauto,managed 0 0
> 
> From "src/core/mount-setup.c":
> 
> { "tmpfs",      "/dev/shm",                  "tmpfs",
> "mode=1777", MS_NOSUID|MS_NODEV|MS_STRICTATIME, NULL,
> MNT_FATAL|MNT_IN_CONTAINER },

So the answer is "no" ?

Re: [gentoo-user] fstab cleanup

[Tom H]

On Wed, May 21, 2014 at 1:53 PM, Stefan G. Weichinger <lists@xunil.at> wrote:
> Am 21.05.2014 15:31, schrieb Tom H:
>> On Wed, May 21, 2014 at 6:32 AM, Stefan G. Weichinger <lists@xunil.at> wrote:
>>>
>>> Do I still need these lines .. especially with a modern
>>> systemd/gnome3-environment?
>>>
>>> # glibc 2.2 and above expects tmpfs to be mounted at /dev/shm for
>>> # POSIX shared memory (shm_open, shm_unlink).
>>> # (tmpfs is a dynamically expandable/shrinkable ramdisk, and will
>>> #  use almost no memory if not populated with files)
>>> tmpfs                   /dev/shm        tmpfs
>>> nodev,nosuid,noexec     0 0
>>>
>>>
>>> /dev/cdrw               /media/cdrecorder       auto
>>> user,exec,noauto,managed 0 0
>>
>> From "src/core/mount-setup.c":
>>
>> { "tmpfs",      "/dev/shm",                  "tmpfs",
>> "mode=1777", MS_NOSUID|MS_NODEV|MS_STRICTATIME, NULL,
>> MNT_FATAL|MNT_IN_CONTAINER },
>
> So the answer is "no" ?

The answer is "no" unless you want to apply different perms to "/dev/shm".

Re: [gentoo-user] fstab cleanup

[Mick]

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On Wednesday 21 May 2014 20:44:04 Tom H wrote:
> On Wed, May 21, 2014 at 1:53 PM, Stefan G. Weichinger <lists@xunil.at> 
wrote:
> > Am 21.05.2014 15:31, schrieb Tom H:
> >> On Wed, May 21, 2014 at 6:32 AM, Stefan G. Weichinger <lists@xunil.at> 
wrote:
> >>> Do I still need these lines .. especially with a modern
> >>> systemd/gnome3-environment?
> >>> 
> >>> # glibc 2.2 and above expects tmpfs to be mounted at /dev/shm for
> >>> # POSIX shared memory (shm_open, shm_unlink).
> >>> # (tmpfs is a dynamically expandable/shrinkable ramdisk, and will
> >>> #  use almost no memory if not populated with files)
> >>> tmpfs                   /dev/shm        tmpfs
> >>> nodev,nosuid,noexec     0 0
> >>> 
> >>> 
> >>> /dev/cdrw               /media/cdrecorder       auto
> >>> user,exec,noauto,managed 0 0
> >> 
> >> From "src/core/mount-setup.c":
> >> 
> >> { "tmpfs",      "/dev/shm",                  "tmpfs",
> >> "mode=1777", MS_NOSUID|MS_NODEV|MS_STRICTATIME, NULL,
> >> MNT_FATAL|MNT_IN_CONTAINER },
> > 
> > So the answer is "no" ?
> 
> The answer is "no" unless you want to apply different perms to "/dev/shm".

I went through a new installation recently and seem to recall that the fstab 
was rather empty from its usual entries.  Will older installations eventually 
get an enotice to this effect with baselayout updates?  

-- 
Regards,
Mick

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Re: [gentoo-user] fstab cleanup

[Stefan G. Weichinger]

Am 21.05.2014 21:44, schrieb Tom H:

> The answer is "no" unless you want to apply different perms to "/dev/shm".

I don't have an idea why I should want to do that so I removed the line
for now. Thanks.

Stefan

[gentoo-user] Re: fstab cleanup

[Nikos Chantziaras]

On 21/05/14 13:32, Stefan G. Weichinger wrote:
>
> Do I still need these lines .. especially with a modern
> systemd/gnome3-environment?
>
> tmpfs                   /dev/shm        tmpfs
> nodev,nosuid,noexec     0 0
>
> /dev/cdrw               /media/cdrecorder       auto
> user,exec,noauto,managed 0 0

You can safely delete both. A /dev/shm mount is created automatically, 
and /media/cdrecorder is not used by anything.

Re: [gentoo-user] Re: fstab cleanup

[Stefan G. Weichinger]

Am 26.05.2014 06:47, schrieb Nikos Chantziaras:
> On 21/05/14 13:32, Stefan G. Weichinger wrote:
>>
>> Do I still need these lines .. especially with a modern
>> systemd/gnome3-environment?
>>
>> tmpfs                   /dev/shm        tmpfs
>> nodev,nosuid,noexec     0 0
>>
>> /dev/cdrw               /media/cdrecorder       auto
>> user,exec,noauto,managed 0 0
> 
> You can safely delete both. A /dev/shm mount is created automatically,
> and /media/cdrecorder is not used by anything.

Some old cruft left from back then somedays --- removed it already, yes.