- Oberon - mailman3.inf.ethz.ch

ETH Oberon: file names.
by peter＠easthope.ca 21 Dec '22

21 Dec '22

>From Hans Klaver hklaver at dds.nl, Fri Dec 9 15:56:18 CET 2022 > I guess the restriction within Oberon (the language) and within > Oberon Systems is more a matter of readability (and then ultimately of > taste and style). I found that security is also a consideration. Added a few sentences with a link. https://en.wikibooks.org/wiki/Oberon/Naming/Files%2C_Servers_and_Viewers > On the other hand, for interfacing with other operating systems > exceptions can be made, even by ETH folks. OFS allows for longer file names. CONST ... PreLength = 16; LocalLength = 128; At least one Web page claims that current Linux systems allow file names up to 255 characters. Further input always welcome. Thx, ... P.L. mobile: +1 778 951 5147 VoIP: +1 604 670 0140 https://en.wikibooks.org/wiki/User:PeterEasthope

2 1

Correction: Re: ETH Oberon: file names.
by peter＠easthope.ca 21 Dec '22

21 Dec '22

https://en.wikibooks.org/wiki/Oberon/Naming/Files%2C_Servers_and_Viewers should be https://en.wikibooks.org/wiki/Oberon/Naming#Files%2C_Servers_and_Viewers Sorry for the complication, ... P. mobile: +1 778 951 5147 VoIP: +1 604 670 0140 https://en.wikibooks.org/wiki/User:PeterEasthope

1 0

Re: [Oberon] Email and file names in ETH Oberon.
by peter＠easthope.ca 21 Dec '22

21 Dec '22

From: peter(a)easthope.ca Date: Mon, 19 Dec 2022 18:48:37 -0800 > Mail.UIDLFile creates a file name such as > "UIDL.172.23.5.1.peterXeasthope.ca". > > That's 33 characters. Mail.UIDLFile attempts to open or create a file > with that name but fails with any name longer than 27 characters. Ie. > name + .Bak + 0x is limited to 32 characters. What limits length of a file name? OFS declares. CONST ... LocalLength = 128; OFSAosFiles restricts further. CONST ... FnLength = 32; (* includes 0X *) For programming instruction in 1990 I imagine that limit sufficed. Originally, a mail user id might have not included a domain name. So a hypothetical file name in Mail would have been UIDL.172.23.5.1.peter rather UIDL.172.23.5.1.peterXeasthope.ca. So the 32 character limit worked for Mail. =8~) Now for many current mail user identities the attempted file name fails. =8~( Expedient solution: change OFSAosFiles to allow a longer file name. CONST ... FnLength = 40; Tolerable? Objectionable? More sophisticated solution: store the mail service information elsewhere from the file name. Hypothetical possibility. Current Mail File name UIDL.172.23.5.1.peterXeasthope.ca containing this line. UID16252-1329772258UID77894-1329772258UID98661-1329772258 And file name UIDL.172.23.6.1.joXdoe.ca containing this line. UID25216-2258132977UID89477-2258132977 etc. Additional detail: in some cultures a human name can begin with X. Replacement of @ with X can yield a failure. =8~/ Hypothetical Simplification File name UIDL containing these lines. 172.23.5.1.peter@easthope.caUID16252-1329772258UID77894-1329772258UID98661-1329772258 172.23.6.1.jo(a)doe.caUID25216-2258132977UID89477-2258132977 etc. Additional detail: replacement of @ with X is abolished. =8~) At least I should avoid documenting a broken MUA. =8~) Thanks, ... P.L. mobile: +1 778 951 5147 VoIP: +1 604 670 0140 https://en.wikibooks.org/wiki/User:PeterEasthope

1 0

Email and file names in ETH Oberon.
by peter＠easthope.ca 20 Dec '22

20 Dec '22

From: Joerg <joerg.straube(a)iaeth.ch> Date: Sun, 18 Dec 2022 22:39:50 +0100 > You could write an email server for both protocols using the same > UID coding, namely a 32bit number For now I just want to be sure Mail works in ETH Oberon. For my mail server, "peter(a)easthope.ca" is a user. Mail replaces @ with X to have a valid file name as discussed a few days back. (https://en.m.wikibooks.org/wiki/Oberon/Naming#Files,_Servers_and_Viewers) Mail.UIDLFile creates a file name such as "UIDL.172.23.5.1.peterXeasthope.ca". That's 33 characters. Mail.UIDLFile attempts to open or create a file with that name but fails with any name longer than 27 characters. Ie. name + .Bak + 0x is limited to 32 characters. The OFS module declares, CONST ... PreLength = 16; LocalLength = 128; FileNameLength = PreLength + LocalLength; Have yet to find where and why the 27 + 5 character limit is imposed. It can interfere with the "dictum of meaninful file names". Conscientious as a user might be, a good name within 27 characters can be difficult. For Mail, the difficulty is more technical. Ideas? Thx, ... P.L. mobile: +1 778 951 5147 VoIP: +1 604 670 0140 https://en.wikibooks.org/wiki/User:PeterEasthope

1 0

Re (2): Email UID.
by peter＠easthope.ca 19 Dec '22

19 Dec '22

Jörg, > UID is a unique identifier to uniquely identify a message in a mailbox folder. > In POP3, it‘s an arbitrary string with max 70 chars > In IMAP, it‘s a 32bit number (converted to string) > > You could write an email server for both protocols using the same UID > coding, ... Good. Thanks. My objective is add a hint in the wikibook. Google and Wikipedia haven't found a good reference yet. I might try to write something based upon your message. ETH O. and A2 O. have a file with name such as UIDL.127.0.0.1.peter(a)easthope.ca. Content here is this in one line. UID16252-1329772258UID77894-1329772258UID98661-1329772258 Three strings of 16 characters separated by the 0X character. 0X might display as an empty rectangle in a mail reader. Meanwhile, three messages exceed the size limit configured in Oberon Mail and wait on the server until the size limit accomodates or the server is accessed by another means such as Web mail. Thx., ... P.L. mobile: +1 778 951 5147 VoIP: +1 604 670 0140 https://en.wikibooks.org/wiki/User:PeterEasthope

2 1

Email UID.
by peter＠easthope.ca 18 Dec '22

18 Dec '22

Hi, In the Wikibook I want to add something about UID in email. This article about IMAP mentions UID but doesn't explain the role well. https://en.wikipedia.org/wiki/Internet_Message_Access_Protocol#Disadvantages UID is used in ETHO which has POP and SMTP but not IMAP. Where are good descriptions? Preferably with URL not too ephemeral. Thx, ... P.L. mobile: +1 778 951 5147 VoIP: +1 604 670 0140 https://en.wikibooks.org/wiki/User:PeterEasthope

2 1

Port Number for server
by Aubrey McIntosh 15 Dec '22

15 Dec '22

What is a good port number to use with the Component Pascal CommServer program? The default port, 900, as distributed appears to be unavailable to an ordinary user in Ubuntu. It is possible to run the server as a privileged user and use port 900. I have temporarily chosen 1951 for testing my own project, and to run it as an ordinary user. -- Aubrey McIntosh, PhD

3 3

Official ETH Git repo
by Liam Proven 15 Dec '22

15 Dec '22

https://gitlab.inf.ethz.ch/felixf/oberon -- Liam Proven ~ Profile: https://about.me/liamproven Email: lproven(a)cix.co.uk ~ gMail/gTalk/FB: lproven(a)gmail.com Twitter/LinkedIn: lproven ~ Skype: liamproven UK: (+44) 7939-087884 ~ Czech [+ WhatsApp/Telegram/Signal]: (+420) 702-829-053

3 2

Re (2): Official ETH Git repo
by peter＠easthope.ca 14 Dec '22

14 Dec '22

From: Michael Schierl <schierlm(a)gmx.de> Date: Wed, 14 Dec 2022 21:46:08 +0100 > I created an account on Monday (which seemed to work fine), but got an > email today that my account will be deleted next week as my email > address is not affiliated to the ETHZ. In https://gitlab.inf.ethz.ch/felixf/oberon/-/blob/main/README.md Felix Friedrich remarks "Please inform me, if you need developer-access to the repository, if you observe missing files, or if you, in general, want to help setting this up." Regards, ... P.L. mobile: +1 778 951 5147 VoIP: +1 604 670 0140 https://en.wikibooks.org/wiki/User:PeterEasthope

1 0

Re (2): ETH Oberon: file names.
by peter＠easthope.ca 14 Dec '22

14 Dec '22

Hans, Thanks for the feedback. Revisions here. https://en.wikibooks.org/wiki/Oberon/Naming Better? From: Hans Klaver <hklaver(a)dds.nl> Date: Fri, 9 Dec 2022 15:56:18 +0100 > I personally find: > In "The Oberon System" Martin Reiser stated, ... > more readable than: > In _The_Oberon_System_ Martin Reiser stated, ... Acknowledged. My old habit is from high school roughly sixty years ago. =8~/ https://www.grammarbook.com/blog/quotation-marks/titles-of-books-plays-arti… > On the other hand, for interfacing with other operating systems > exceptions can be made, even by ETH folks. This prompted the query. https://sourceforge.net/projects/nativeoberon/files/nativeoberon/Native%20O… The name with the underscore, NativeOberon_2.3.7.tar.gz violates stated Oberon syntax unnecessarily. Removing the underscore before gunzipping in Oberon is a distraction for a novice. =8~/. Are these better? NativeOberon.2.3.7.tar.gz NativeOberon2.3.7.tar.gz To me, the last suffices. Changing the name of the existing archive is objectionable? Add a duplicate with the Oberon conformant name? Thx, ... P.L. mobile: +1 778 951 5147 VoIP: +1 604 670 0140 https://en.wikibooks.org/wiki/User:PeterEasthope

1 0