svn commit: r244198 - in head: etc/rc.d sbin/sysctl

[Xin Li]

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On 12/19/12 13:08, Garrett Cooper wrote:
> On Wed, Dec 19, 2012 at 12:14 PM, Chris Rees <utisoft at gmail.com>
> wrote:
>> 
>> On 19 Dec 2012 19:37, "Garrett Cooper" <yanegomi at gmail.com>
>> wrote:
>>> 
>>> On Wed, Dec 19, 2012 at 7:37 AM, Ian Lepore 
>>> <freebsd at damnhippie.dyndns.org> wrote:
>>> 
>>> ...
>>> 
>>>> Instead of running sysctl a bunch of times, how about
>>>> something conceptually similar to
>>>> 
>>>> cat /etc/sysctl.d/* /etc/sysctl.conf | sysctl -f -
>>>> 
>>>> Along with this (untested) patch to make sysctl understand
>>>> "-f -".
>>>> 
>>>> Hmmm, is /dev/stdin available as early as sysctl.conf runs?
>>>> If not, the attached patch isn't going to work.
>>> 
>>> Why not just make sysctl understand multiple -f options?
>>> You're probably going to run into more problems parsing from
>>> /dev/stdin and it's going to obfuscate things a lot dealing
>>> with which file came last, feeding back diagnostic info, etc. 
>>> Please don't "linuxise" this tool.
>> 
>> I seem to recall cpio being around a lot before Linux... Our sh
>> also accepts piped scripts.  It's useful.
> 
> Yes, but it just compresses data and doesn't have to necessarily 
> backtrack in order to do so.
> 
>> ssh host cat file | sysctl -f -
> 
> I prefer:
> 
> ssh host cat file > foo sysctl -f foo
> 
> ... and my bikesheds navy blue.

Vulnerable to temporary file attacks (which is relatively easy to
mitigate with mkstemp, though) and poor error handling.

Cheers,
- -- 
Xin LI <delphij at delphij.net>    https://www.delphij.net/
FreeBSD - The Power to Serve!           Live free or die
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