dce@mips.UUCP (David Elliott) (08/26/87)
In the past few months, an interesting problem has come up twice, and
I think it's time I found out the solution and documented it.
The situation is that system X wants to talk to system Y, while
calling it Z.
That is, the Systems file entry looks like:
hp-cup Any ...
but the machine on the other side is actually named 'hpda'.
Does anyone know of any way to "alias" a Systems entry in this
way, or is it just unsafe?
--
David Elliott {decvax,ucbvax,ihnp4}!decwrl!mips!dcekathy@wrcola.UUCP (K.M.Vincent) (08/27/87)
In article <623@quacky.UUCP> dce@mips.UUCP (David Elliott) writes: > >The situation is that system X wants to talk to system Y, while >calling it Z. > >That is, the Systems file entry looks like: > > hp-cup Any ... > >but the machine on the other side is actually named 'hpda'. > >Does anyone know of any way to "alias" a Systems entry in this >way, or is it just unsafe? I've heard of this being done - but with the called end controlling the situation. For example, cuaepd was not a real machine - it was a "virtual" machine on cuae2, set up to enable people to access mod.sources archives. Someone else I know did the same thing. He set up his system so that if another machine called in looking for "market" - his "virtual machine" - his machine "bpsrate" allowed a different set of permissions and such. [Ed.note: The names have been changed to protect the innocent.] The key was in the Permissions file. There's an option you can set (sorry, no docs handy, and I don't remember the name) so that, if machine A calls in and tells your machine it's looking for machine X, your machine tells machine A that it *is* machine X. And away you go. Unsafe, yes ... Kathy Vincent -----> AT&T: {ihnp4|mtune|burl}!wrcola!kathy -----> Home: {ihnp4|mtune|ptsfa|codas}!bakerst!kathy
jhc@mtune.ATT.COM (Jonathan Clark) (08/27/87)
In article <623@quacky.UUCP> dce@mips.UUCP (David Elliott) writes: >The situation is that system X wants to talk to system Y, while >calling it Z. > >That is, the Systems file entry looks like: > > hp-cup Any ... > >but the machine on the other side is actually named 'hpda'. If I understand the problem correctly, you want to call hpda and have it claim that it is hp-cup. If so, then the solution is as follows: hpda's Systems entry is: hpda Any ACU 4321 in: nuucp hp-cup's entry is: hp-cup Any ACU 4321 in: luucp Note the different lognames. Then in hpda's Permissions file you put: LOGNAME=luucp MYNAME=hp-cup and away you go. This is in Appendix IV of my UUCP Administration manual, I have no idea where it might be in the printed ones. You can also change your name while calling out: MACHINE=foo MYNAME=bar makes your system claim to be 'bar' only when calling 'foo'. Note that all this makes the *real* identity of the machine calling in problematical at best... -- Jonathan Clark [NAC,attmail]!mtune!jhc An Englishman never enjoys himself except for some noble purpose.
tim@ora.UUCP (Tim O'Reilly) (08/28/87)
In article <623@quacky.UUCP>, dce@mips.UUCP (David Elliott) writes: > The situation is that system X wants to talk to system Y, while > calling it Z. That is, the Systems file entry looks like: > > hp-cup Any ... > > but the machine on the other side is actually named 'hpda'. > > Does anyone know of any way to "alias" a Systems entry in this > way, or is it just unsafe? I believe there is a "myname" option in HDB that will let you do the reverse of this. That is, in your example, hpda can have a definition in a Permissions file entry for you that says when you call, myname=hp-cup. I don't think there is a way to do this from your end. I've never tried this, so let me know if it works. -- Tim O'Reilly (617) 527-4210 O'Reilly & Associates, Inc., Publishers of Nutshell Handbooks 981 Chestnut Street, Newton, MA 02164 UUCP: seismo!uunet!ora!tim ARPA: tim@ora.uu.net
inra@axis.fr (Inst. Natl. Rech. Agronomique) (09/02/87)
Sorry I am new on the network and my english is bad... I am trying to send to the shell, from a file: ESC A text Return If I don't have problem to do that directly from the terminal i am unable to send it from a file. I was looking in sh and echo but I was unable to find the good syntax. Can anyone help me? Thanks in advance ---------------------------------- Yves Bertheau INA-PG Pathologie Vegetale 16 rue Claude Bernard 75231 PARIS cedex 05 Tel: (1) 43.31.93.97