pausv@smidefix.liu.se (Paul Svensson) (12/06/88)
Problem: How do I start a background server process on another machine?
I have tried using rsh, but it refuses to exit when I want it to.
I have also looked at rexec(), but it seems to require username
and password info to be availiable; a real pain in the ***.
What I'm trying to do: Given a mixed network (mostly suns and goulds,
but also others) I would like to start a server
on any availiable machine; this should be done
only when a client notices that no server is
availiable - note that the machine running the
client is possibly not able to run the server.
Question: How do I achieve this, without leaving rsh, in.rshd or
other processes waiting for the server to die ?
Note: I would really prefer if this could be done without installing
something suid root, for pure beurocratic reasons.
I'd be thankful for any help, but if you're going to barf RTFM -
_please_ at least give me a hint where to look :-)
/Paul
---
Paul Svensson psv@ida.liu.se SM5SJSmaart@cs.vu.nl (Maarten Litmaath) (12/07/88)
pausv@smidefix.liu.se (Paul Svensson) writes:
\Problem: How do I start a background server process on another machine?
\ I have tried using rsh, but it refuses to exit when I want it to.
The following example might help:
rsh machine -n sh -c 'server &'
The `-n' flag connects the stdin of rsh to /dev/null.
--
fcntl(fd, F_SETFL, FNDELAY): |Maarten Litmaath @ VU Amsterdam:
let's go weepin' in the corner! |maart@cs.vu.nl, mcvax!botter!maartchilders@avsd.UUCP (Richard Childers) (12/08/88)
In article <1103@smidefix.liu.se> pausv@smidefix.liu.se (Paul Svensson) writes: >Problem: How do I start a background server process on another machine? I've had success with the following format : rsh hostname "(commmand ; command -flag arg arg) &" ... or rsh hostname "(commmand ; command -flag arg arg) &" >& /dev/null ... if you're disinclined towards seeing process IDs ... >I'd be thankful for any help, but if you're going to barf RTFM - > _please_ at least give me a hint where to look :-) The most educational thing to do in circumstances like this is to just 'play'. Play with it, make some mistakes, look for patterns, until you've got the mechanism figured out. It's almost faster than reading the manual sometimes. >Paul Svensson psv@ida.liu.se SM5SJS -- richard -- * Black holes are out of sight * * * * ..{amdahl|decwrl|octopus|pyramid|ucbvax}!avsd.UUCP!childers@tycho * * AMPEX Corporation - Audio-Visual Systems Division, R & D *
levy@ttrdc.UUCP (Daniel R. Levy) (12/11/88)
In article <1776@solo11.cs.vu.nl>, maart@cs.vu.nl (Maarten Litmaath) writes: > fcntl(fd, F_SETFL, FNDELAY): |Maarten Litmaath @ VU Amsterdam: > let's go weepin' in the corner! |maart@cs.vu.nl, mcvax!botter!maart What's to weep about? I'm curious. -- |------------Dan Levy------------| THE OPINIONS EXPRESSED HEREIN ARE MINE ONLY | Bell Labs Area 61 (R.I.P., TTY)| AND ARE NOT TO BE IMPUTED TO AT&T. | Skokie, Illinois | |-----Path: att!ttbcad!levy-----|
zifrony@TAURUS.BITNET (01/12/89)
In article <1103@smidefix.liu.se> pausv@liuida.BITNET writes: >Problem: How do I start a background server process on another machine? > I have tried using rsh, but it refuses to exit when I want it to. > I have also looked at rexec(), but it seems to require username > and password info to be availiable; a real pain in the ***. ... > >Question: How do I achieve this, without leaving rsh, in.rshd or > other processes waiting for the server to die ? ... > /Paul >--- >Paul Svensson psv@ida.liu.se SM5SJS Sorry for the late posting, but I've just reched this newsgroup. But now to business. I have encountered the same problem when trying to create a server process, on another machine via 'system("rsh ....")'. What I did, after consulting with the local wizard was: 1. close fds 0, 1 and 2. 2. fork() - the server runs as the child process. 3. the father commits suicide. This works just fine for me, but I guess it slows down the initialization. Later, the initiating process on machine A, and the server process on machine B talked using a socket. Try it, and may god be with you. Doron Zifrony E-mail: zifrony@taurus.bitnet or Msc. student zifrony@Math.Tau.Ac.IL Tel Aviv University Israel