No /proc/sys/kernel/hostname file

[sepiroth887]

im using Hub (https://github.com/github/hub) quite a lot but it seems that it's trying to lookup it's local hostname via /proc/sys/kernel/hostname.

Is that something that can be supported in the future?

[sepiroth887]

The failure seems to come from GoLang's os.Hostname() call, so not just this tool being affected I'd assume.

[benhillis]

Sure thing, I'll file a bug to get this added. It looks like we're missing a lot of files in /proc/sys/kernel.

As a workaround, we do have the hostname in /etc/hostname.

[sepiroth887]

👍
I found that too. May do a temp fix on.my.own hub branch but doubt fixing go os package is an option. :)

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On Tue, Jun 21, 2016 at 9:26 AM -0700, "Ben Hillis" [email protected] wrote:

Sure thing, I'll file a bug to get this added. It looks like we're missing a lot of files in /proc/sys/kernel.

As a workaround, we do have the hostname in /etc/hostname.

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[sundhaug92]

Shouldn't it rather use /etc/hostname ?

On Tue, Jun 21, 2016 at 6:47 PM, Tobias Haag [email protected]
wrote:

👍
I found that too. May do a temp fix on.my.own hub branch but doubt fixing
go os package is an option. :)

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On Tue, Jun 21, 2016 at 9:26 AM -0700, "Ben Hillis" <
[email protected]> wrote:

Sure thing, I'll file a bug to get this added. It looks like we're missing
a lot of files in /proc/sys/kernel.

As a workaround, we do have the hostname in /etc/hostname.

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[benhillis]

@sundhaug92 - You'll have to ask Google :)

I'm sure there's some reason this was chosen. Perhaps /etc/hostname is written by some daemon that not all distros run.

[sepiroth887]

Looks like proc location is the default for rhel/centos whereas Ubuntu seems to favor /etc

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On Tue, Jun 21, 2016 at 9:53 AM -0700, "Ben Hillis" [email protected] wrote:

@sundhaug92 - You'll have to ask Google :)

I'm sure there's some reason this was chosen. Perhaps /etc/hostname is written by some daemon that not all distros run.

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[DHowett]

More to the point, /proc/sys/kernel/hostname is the real and effective hostname of the system, and /etc/hostname is a configuration file that is used to set that hostname. Since one is a specified kernel interface (/proc/...) and the other is a distribution-specific configuration file, it makes sense that Go would choose /proc/....

That said, though, there's a syscall gethostname(2), which really is the right tool for the job. It's curious that Go doesn't use it.

[benhillis]

@DHowett That's a good explaination. You can also get the host name via the uname system call. I'm also curious why Go doesn't use one of the syscalls.

[benhillis]

This file has been implemented. Not sure if it made Anniversary Update but it's definitely in new Insider builds.