On Sun, Mar 6, 2016 at 8:43 PM, Tony Anderson <tony_ander...@usa.net> wrote:
> Hi, Adam > > That is surprising. I thought that was the goal of your micro server > program. Does this mean that you are using the laptops as clients with > access to > an sdcard local to that machine only? > In some Haiti schools, yes: self-sufficient XO-1's each containing 32GB SD cards and there is no school server, no network, no food for the kids, etc. PS Am cc'ing School Server mailing lists so that your offline-NTP-via-schoolserver contribution below is appreciated! The backup is performed on the XO. This routine provides the > 'synchronization'. > > import os, re, sys, time > from urllib2 import URLError, HTTPError, urlopen > from subprocess import Popen, PIPE, call > import datetime > > > > def sync_time_to_xs(): > > try: > xstime = urlopen('http://schoolserver/kls/time') > except: > print 'urlopen exception', sys.exc_info()[2] > return > response = xstime.read().replace('\n','') > """ > cmd = 'su' > call(cmd, shell=True) > cmd = 'date --set="' + response + '"' > call(cmd, shell=True) > call('exit ',shell=True) > """ > txtout = 'sudo date --set="' + response + '"' > print txtout > fout = open('/tmp/xstime','w') > fout.write(txtout) > fout.close() > > kls is a django app so the url gets time 'now' from the server and returns > it via urllib2. The txtout uses subprocess to execute the date set command. > The problem is that the date --set command must be done by root from a tty > (e.g. cli). > > So, I don't know if xsce is using django. In any case, a script urllib > command can be made to retrieve the current time on the school server. A > script executed from the XO can use this time to set the XO time. All of > this could be set up as a button in the control panel (cpsection). Such a > button would meet the tty requirement. Naturally, all of this depends on > having the xsce server with the correct time (in any case as the master > whether correct or not). The date command allows for showing the time in > the local timezone although the master time is kept in UTC. > > Tonu > > > On 03/07/2016 08:36 AM, Adam Holt wrote: > > On Sun, Mar 6, 2016 at 6:58 PM, Tony Anderson <tony_ander...@usa.net> > wrote: > >> Adam >> >> I have a script that attempts to accomplish this through ds_backup. The >> goal is to have all of the clients with the same time as the school server >> (may not be internet accurate but at least gives some consistency to time >> stamps). The problem is that this must be done by a command issued from a >> tty. In the case >> of xsce, this could be done at connect-time when the XO1 time is off by >> more than X. >> > > Cool, please post? > > My problem is there are many school in Haiti that do not and will not have > school servers -- for the forseeable future -- so let's attack this problem > from both angles -- thanks! > > Tony >> >> >> On 03/07/2016 01:19 AM, Adam Holt wrote: >> >> (Apologies I forgot to mention that auto-mounting and auto-dismounting >> the USB stick is likely the hard part -- untrained teachers simply cannot >> handle mount-point ambiguities, if they can handle the command-line at all >> -- suggestions on how to solve this elegantly most appreciated!) >> >> PS we are happy to mandate that teachers must supply an empty/formatted >> FAT32 stick or similar if that's the best practice? >> >> On Sun, Mar 6, 2016 at 12:08 PM, Adam Holt < <h...@laptop.org> >> h...@laptop.org> wrote: >> >>> In short, <http://NTP.org>http://NTP.org - by - sneakernet, not carrier >>> pigeon :> >>> >>> >>> On Sun, Mar 6, 2016 at 12:06 PM, Adam Holt < <h...@laptop.org> >>> h...@laptop.org> wrote: >>> >>>> Clarifs below~ >>>> >>>> On Sun, Mar 6, 2016 at 11:51 AM, Adam Holt < <h...@laptop.org> >>>> h...@laptop.org> wrote: >>>> >>>>> In Haiti many teachers and kids would prefer the time was set >>>>> correctly on their XO-1 laptops, no matter if the time is off by a couple >>>>> minutes. So they could really use a script that creates the following >>>>> /boot/olpc.fth, writing it out to an attached USB stick: >>>>> >>>>> \ Open Firmware >>>>> select /rtc decimal 0 0 0 1 1 1804 set-time >>>>> \ Optionally unlock XO >>>>> disable-security >>>>> >>>>> Then the teacher/operator can walk around the room to fix all XO's >>>>> clocks (refreshing the USB time as often as she/he wants). Of course not >>>>> every day can be Haitian Independence Day (Jan 1 1804!) so what the script >>>>> should really do is create a timestamp 1 minute into the future, filling >>>>> out those 6 numbers above correctly. >>>>> >>>>> The untrained operator (teacher typically) will then move the USB >>>>> stick to the XO(s) in need, to set their RTC's (real-time-clocks). Some >>>>> ambitious teachers will want to do this every month/semester it appears, >>>>> to >>>>> sanitize/harmonize all clocks in their classroom/school as much as >>>>> possible! >>>>> >>>>> Any recommended approaches to getting the UX clean, so that such >>>>> untrained operator have a visual confirmation that the USB stick has been >>>>> updated with a proper time-stamp, and (perhaps just as important??) the >>>>> stick mounted+unmounted effortlessly without too much risk, when this USB >>>>> stick is recreated hundreds of times within 1 day? A non-confusing >>>>> command >>>>> line script can work, that says basically 2 things: >>>>> >>>>> - PLEASE INSERT A USB STICK >>>>> - USB STICK READY: REMOVE IT NOW! >>>>> >>>>> The less keyboard activity required from the teacher the better. But >>>>> I'm tempted by command syntax as follows: >>>>> >>>> >>>> usb-timestamper <minute*s*-into-the-future> >>>> >>>> >>>>> Such that running "/bin/usb-timestamper 5" would create USB sticks >>>>> timestamped 5 minutes into the future. The default should be 1 minute >>>>> into >>>>> the future, so running "/bin/usb-timestamper" would be equivalent to >>>>> "/bin/usb-timestamper 1". >>>>> >>>>> Conclusion: am just looking for general suggestions from everyone as >>>>> we cook up something simple! >>>>> >>>> >>>> We do not want to rely on networking or mesh At All. KISS (key it >>>> simple/stupid) at the firmware level allows the teacher/operator to move >>>> thru the classroom quite rapidly, fixing the time on each XO laptop as >>>> often as s/he wants. 2 examples scenarios, showing how this will be used: >>>> >>>> 1. Teacher/operator may choose to run "usb-timestamper 10" once as >>>> s/he enters each classroom, if she wants to timestamp the USB stick >>>> 10min >>>> into the future, and then apply this rapidly to all 50 XO's in a >>>> classroom/lab over the coming 20minutes. Works great ifs/he does not >>>> care >>>> that the XO's clocks are off by +/- 10min! >>>> 2. Or if teacher/operator is perfectionist, then usb-timestamper >>>> (interactive command-line program) can be left running on hir own XO >>>> laptop >>>> that s/he carries around the room -- updating the USB stick repeatedly >>>> while walking around the classroom -- such that each of that room's 50 >>>> XO >>>> laptops has an almost-exact clock, accurate within a minute or so. >>>> >>>> >>>>> >>>>> in this case, as USB sticks are the most reliable and quick approach >>>>> in this case. >>>>> >>>>> Clarif: I will of course train the teacher/operator to set the clock >>>>> correctly on their own XO-1, which will typically be running OLPC OS >>>>> 13.2.7 >>>>> -- so that all these "offline-NTP sticks" are created based on a >>>>> reasonably >>>>> accurate baseline timestamp :) >>>>> >>>>> -- >>>>> Unsung Heroes of OLPC, interviewed live @ <http://unleashkids.org> >>>>> http://unleashkids.org ! >>>>> >>>> >>>> >>>> >>>> -- >>>> Unsung Heroes of OLPC, interviewed live @ <http://unleashkids.org> >>>> http://unleashkids.org ! >>>> >>>> -- >>>> Unsung Heroes of OLPC, interviewed live @ <http://unleashkids.org> >>>> http://unleashkids.org ! >>>> >>>> -- >>>> Unsung Heroes of OLPC, interviewed live @ <http://unleashkids.org> >>>> http://unleashkids.org ! >>>> >>> -- >> Unsung Heroes of OLPC, interviewed live @ <http://unleashkids.org> >> http://unleashkids.org ! >> --- >> You received this message because you are subscribed to the Google Groups >> "Unleash Kids" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to <unleashkids+unsubscr...@googlegroups.com> >> unleashkids+unsubscr...@googlegroups.com. >> For more options, visit https://groups.google.com/d/optout. >> >> >> -- >> Unsung Heroes of OLPC, interviewed live @ <http://unleashkids.org> >> http://unleashkids.org ! >> --- >> You received this message because you are subscribed to the Google Groups >> "Unleash Kids" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to unleashkids+unsubscr...@googlegroups.com. >> For more options, visit https://groups.google.com/d/optout. >> >> -- >> Unsung Heroes of OLPC, interviewed live @ http://unleashkids.org ! >> > -- > Unsung Heroes of OLPC, interviewed live @ <http://unleashkids.org> > http://unleashkids.org ! > --- > You received this message because you are subscribed to the Google Groups > "Unleash Kids" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to unleashkids+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > > > -- > Unsung Heroes of OLPC, interviewed live @ http://unleashkids.org ! > --- > You received this message because you are subscribed to the Google Groups > "Unleash Kids" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to unleashkids+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > > -- > Unsung Heroes of OLPC, interviewed live @ http://unleashkids.org ! >
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