Re: fractional file timestamps in tramp-adb

[Michael Albinus <michael.albinus@gmx.de>]

Paul Eggert <eggert@cs.ucla.edu> writes:

Hi Paul,

> A downside of the new approach is that it assumes POSIX.1-2008 or
> later, but I guess that's OK nowadays. An upside is that 'touch -d'
> lets one specify the fractional part of the timestamp, and also lets
> one specify that the timestamp is UTC by appending "Z" (I don't see
> how the current code is arranging for UTC). So, how about the attached
> followup patch? It would change the format to:
>
> touch -d 2019-02-14T18:23:17.318491822Z file

It doesn't work, at least on my Galaxy S6:

--8<---------------cut here---------------start------------->8---
$ touch -d 2019-02-14T18:23:17.318491822Z /sdcard/tmp/foo         
touch: bad '2019-02-14T18:23:17.318491822': Value too large for defined data type
--8<---------------cut here---------------end--------------->8---

It runs Android 7.0, as identified by Tramp:

--8<---------------cut here---------------start------------->8---
$ echo \"`getprop ro.product.model` `getprop ro.product.version` `getprop ro.build.version.release`\"
"SM-G920F 7.0"
--8<---------------cut here---------------end--------------->8---

OTOH, touch doesn't work at all on my device, because it isn't rooted:

--8<---------------cut here---------------start------------->8---
$ touch -d 2019-02-14T18:23:17 /sdcard/tmp/foo                      
touch: '/sdcard/tmp/foo': Operation not permitted
--8<---------------cut here---------------end--------------->8---

But that's another story; I don't want to modify my device that way.

Best regards, Michael.