March 2007 - Oberon - mailman3.inf.ethz.ch

Bug in Utilities.Buffer.Add
by Yaroslav Romanchenko 17 Mar '07

17 Mar '07

Folk, In "Utilities.Buffer.Add" TRAP happens when "buf" has more data than "LEN(data) * 2". And maybe will be useful to have in Buffer object methods which allows adding integers in LittleEndian. Something like that: PROCEDURE AddInt* (n, len: LONGINT); VAR i: INTEGER; b, res: LONGINT; s: ARRAY 4 OF CHAR; BEGIN ASSERT (len <= 4); i := 0; b := 1; WHILE i < len DO s[i] := CHR (BIT.LAND ((n DIV b), 0FFH)); b := b * 100H; INC (i); END; Add (s, 0, len, TRUE, res) END AddInt; Or BB has standard procedures for such operations excluding using of module SYSTEM? -- Cheers, SAGE http://sage.h15.ru/

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SMTP tunneled through SSH
by Easthope 15 Mar '07

15 Mar '07

Folk, In SSH.Tool Guenter Feldmann gives this example. SSH.StartForwarding fld@relayhost 1025:mailhost:25 ~ According to the specification, locPort = 1025. Yet the Mail.Panel sends mail by SMTP which uses port 25. So can anyone tell me why locPort = 1025? Thanks, ... Peter E.

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Re: POP use of UIDL command ?
by Chris Glur 12 Mar '07

12 Mar '07

Newsgroups: comp.os.linux.networking,comp.mail.misc news(a)absamail.co.za writes: > > It's not clear to me from my RFCs: 1939, 1725, 2449 how the > > [list unique IDs of mails still on the server] UIDL is used. Sam wrote: > It's for mail clients that cache message's contents. A mail client that > sees a UIDL for the first time recognizes that it's a new message, and will > download it. A mail client that already saw the same UIDL will not need to > download its contents again, because it already has it. > > Recording each message's UIDL is still useful even if the mail client always > deletes messages, after downloading them from a POP3 maildrop. If there's > an exception that interrupted the download process, messages that were > downloaded will still remain on the server (pay careful attention to how > DELE and QUIT works); and the next time the client reconnects it will > otherwise end up downloading duplicate copies of some of the messages. > > Recording each message UIDLs will prevent that, since the mail client will > easily recognize message that it already has, making the POP3 mail download > process essentially bulletproof. -- yes, the delete only happens after a successful 'log out'. PS. linux groups are quiet strong for inet queries.

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Re. UIDL in POP3
by Chris Glur 10 Mar '07

10 Mar '07

peasthope wrote: > Q.: Why does the Oberon MUA issue the UIDL > when messages are to be deleted from the server=3F > Why not just collect all the messages, delete=20 > all from the server and ignore UID=3F Mail.Mod [also] uses UIDL in PROC Synchronize, and I also want to know the detailed reasons, so I'm posting: Newsgroups: comp.os.linux.networking,comp.mail.misc Subject: POP use of UIDL command ? It's not clear to me from my RFCs: 1939, 1725, 2449 how the [list unique IDs of mails still on the server] UIDL is used. I'm speculating that when a list of mails is left on the server and the client, then the ability to check/synchronize the 2 lists-of-mails is needed. Provision must be made for the possibility of mail[s] being deleted from either the server or client, without the corresponding client or server deletion; which would cause a loss of synchronism. Q - what would the alrogithm be for using such UIDL facility ? Perhaps: ForEach ServerMail: Get the unique-ID; Compare with the Client's listing & provide info. re. any miss-match. Perhaps any mails which are on one only of the server and client, would be marked as such ? Forcing a synchronisation would need deleting the unmatched mails ? Thanks for any info. == Chris Glur.

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UIDL in POP3
by Easthope 08 Mar '07

08 Mar '07

Folk, Here is a small question about the Oberon MUA. My Oberon.Text specifies "LeaveOnServer = No". In the Local Settings mail panel, The "Leave messages on server" box is not checked. Yet when mail is being retrieved, these lines appear in the System.Log. SND: UIDL RCV: +OK uidl command accepted. Q.: Why does the Oberon MUA issue the UIDL when messages are to be deleted from the server? Why not just collect all the messages, delete all from the server and ignore UID? Thanks, ... Peter E.

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SSH.Tool, TCP/IP port forwarding and tunneling
by Easthope 06 Mar '07

06 Mar '07

Folk, I am interested in using the TCP/IP port forwarding in SSH.Tool and need a little help with concepts. Are port forwarding and ssh tunneling distinct concepts, implemented together because ssh tunneling is required for secure forwarding, or is tunneling a special case of forwarding, involving just two nodes? Thanks, ... Peter E.

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Need RX 'substitute' confirmation ?
by Chris Glur 05 Mar '07

05 Mar '07

I previously indicated reluctance to spend further resources testing the Regul* Babel* package pair. In fact, I had previously downloaded these 2 packages and started trying to install. Fortunately N-O makes keeping a log very easy, so I could continue with my efforts. The fact that the 'authorities' have decide NOT to include Regul/Babel in the package list was a consideration for deciding to abort the intall/test/run attempt. The main fact was/is the non-standard format. I see now eg. that: * RegulFindApi.Mod [and all/most text] use a non-standard font, were I'm not able to read the text properly, because line-len exceeds what I can see under VGA; even for Desktops.OpenDoc . * Script.Open RegulFindApi.Mod ~ does TRAP -14 Of course it's no problem to convert any text to any more convenient font. But one must ask WHY was the pakages[s] non-standard initially. There are tasks which are uneconomical for the lone operator to do, but which become viable with collaboration. A wiki helps capture and coordinate the dispersed efforts. Since regular expression search-and-replace must be one of the most usefull facilities for common usage, if any N-O user has in fact installed and substantially used the Regul/Babel package-pair please confirm if my previous example, is doable. Ie. delete multiple consecutive lines, where the starting and ending lines to be deleted, contain specified starting and ending strings. Also delete only text [including line boundries] between the starting and ending strings. If this works I'll put some guiding notes on Edgars wiki so that other users can benefit from the availability of an essential tool. Thanks, == Chris Glur.

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Re: RX.Tool scope limited to 1 line ?
by Chris Glur 03 Mar '07

03 Mar '07

Chris Glur wrote: > > > > This most frustrating [but essential] Tool ! > Peter E. wrote: > Babel and Regul written by Gerard Meunier are > far more sophisticated. Try them. RX is for > simpler tasks. System.Directory SrcModls:Babel* == 36 files BAK:Regul* == 16 files I don't want to 'get married' ! I want something that fits into to the minimalist N-O style. Only if someone confirms that Babel/Regul can already do what I've specified, will I invest resources on a new BIG utility. I can't remember why I aborted previously after downloading it. If I [or hopefully someone else] uses it & has some examples to list on 'the wiki' that would be good. > > When ever I try to program it after 6 months away, I need a > > 2 hour refresher course. > > Two hours spent studying Regul will be a > better investment. > > > I've always understood that the 'scope' is limited to a single line. > > Ie. that searching & replacing cannot be done over line boundries. > > True as far as I know for RX. Regul does not > have that limitation. > > > This seems not to be the case. Since there would then be no reason > > to have in the recognised 'syntax': > > " c : carriage return " > > That allows you to match the whole line > to the end rather than a substring of > the line. OK, it's equivalent to EOT/F in a text/file. } > > Can this utility eg. find and remove all such 4 lines from a marked > > frame: > > > > <anyString> <space> "cat" <anyString> > > <anyString for line 2> > > <anyString for line 3> > > <anyString> <space> "dog" > > Easily done with ET. Just mark the text > with MR. ET.Search to the mark. Replace > with a CR. Repeat or use RepAll. No. I've got 5 Texts per day, each with many repeated 'patterns' which I want to delete by just marking the text and hitting ET.Do FixCatDog. Ie. by just programming 3 lines in a script. An example of a very common requirement is a lot of inet fetched files having all lines with 3 leading spaces, which causes it to overflow my favoured display width. BTW my first [and last] exercise in N-O was to remove the unwanted fields of newsHeaders. The algorithm seems to be overly complex: 1. use the scanner the find the good-lines & note the <CR> count to an array. 2. use the reader to find the char-position of the end/start of each good-line, from the saved <CR> counts. 3. use the found char-positions to delete text before and between good-lines. Email headers are becoming absurdly large these days too ! The same data/table-driven utility, would cleanup the Email headers also. Which relates to Thomas' post where he didn't answer my question but claimed that the scanner is for input and the caret is for output. I disagree: in TTY days the 'display' was output-only, but for N-O the display is the major part of the INPUT which gives N-O its power. ===================================== Aubrey.McIntosh wrote: > I found that the three search strings here work separately, but when I > try to concatenate them, I receive a line too long error. The next > step might be to do a replace of the complicated strings with some > relatively simple constant string in 1 pass, so that RX doesn't get > lost. > > dog cat frodo lives > this and that > more nonsense > house dog > > dog cat2 gandolf dies > this and that > more nonsense > house dogs > > dog cat frodo lives > house dog > > dog cat frodo lives > this and that > more nonsense > house dog > > dog cat2 frodo lives > this and that > more nonsense > house dogs { i | t | " " } == some(alfanum OR <TAB> OR <space> ) Perhaps "~c" =anything but a lineEnd is better, to also see special chars. But that still doesn't fix it. > RX.Search > > RX.SetSearch { i | t | " " } X1 " cat" { i | t | " " } c > RX.SetSearch { i | t | " " } c > RX.SetSearch { i | t | " " } " dog" c I think a lot [of what to avoid] can be learned from RX*. RX.Tool is NOT a tool/utility, but a game for exercising agile minded school-boy tricks. Thanks, == Chris Glur.

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RX.Tool scope limited to 1 line ?
by Chris Glur 01 Mar '07

01 Mar '07

This most frustrating [but essential] Tool ! When ever I try to program it after 6 months away, I need a 2 hour refresher course. I've always understood that the 'scope' is limited to a single line. Ie. that searching & replacing cannot be done over line boundries. Which is a serious limitation. This seems not to be the case. Since there would then be no reason to have in the recognised 'syntax': " c : carriage return " Can this utility eg. find and remove all such 4 lines from a marked frame: <anyString> <space> "cat" <anyString> <anyString for line 2> <anyString for line 3> <anyString> <space> "dog" ? I find that only by capturing the tortured labour in an ET.Do script can I justify the use of this frustrating utility. The fact that the original design [with a mod now AFAIK in Edgar's wiki] was restricted to ascii chars, tells a lot. Thanks for any info, ==Chris Glur.

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