Making a Unix daemon process (was: Forking into the background (Linux))

2012-12-23 Thread Ben Finney
Hans Mulder writes: > On 24/12/12 01:50:24, Olive wrote: > > My goal is to write a script that 1) write something to stdout; then > > fork into the background, closing the stdout (and stderr, stdin) pipe. > > > > I have found this answer (forking -> setsid -> forking) > > http://stackoverflow.co

Re: Daemon process

2009-09-02 Thread Hendrik van Rooyen
On Wednesday 02 September 2009 05:57:02 Shan wrote: > I have XML RPC Server listening on a port. This XML RPC Server works > fine when i run it as foreground process. All the clients are able to > connect with the XML RPC Server. But when i run it as daemon(not using > &. I am doing it in python wa

Re: Daemon process

2009-09-01 Thread Gabriel Genellina
En Wed, 02 Sep 2009 00:57:02 -0300, Shan escribió: I have XML RPC Server listening on a port. This XML RPC Server works fine when i run it as foreground process. All the clients are able to connect with the XML RPC Server. But when i run it as daemon(not using &. I am doing it in python way o

Daemon process

2009-09-01 Thread Shan
I have XML RPC Server listening on a port. This XML RPC Server works fine when i run it as foreground process. All the clients are able to connect with the XML RPC Server. But when i run it as daemon(not using &. I am doing it in python way only), then no clients are able to connect with the Server

Re: PEP 3143 and daemon process

2009-04-13 Thread Alfredo Deza
ctly a > > Python application and could not find anything quite like it. > > Note that, as described in PEP 3143, “daemonize a program” means > nothing more than making the *current program* become a daemon > process. It implies nothing special about external interaction with > tha

Re: PEP 3143 and daemon process

2009-04-13 Thread Ben Finney
ze a program” means nothing more than making the *current program* become a daemon process. It implies nothing special about external interaction with that process; having a service channel for controlling a separate process isn't part of becoming a daemon. > And now I know of python-d

Re: PID lockfile (was: PEP 3143: Standard daemon process library)

2009-03-26 Thread Ben Finney
(replying in ‘comp.lang.python’ for wider feedback on this issue) On 26-Mar-2009, Francis Irving wrote: > On Thu, Mar 26, 2009 at 12:51:06AM +1100, Ben Finney wrote: > > The ‘python-daemon’ distribution includes a module, > > ‘daemon.pidlockfile’. The ‘daemon.pidlockfile.PIDLockFile’ class is > >

Re: PEP 3143: Standard daemon process library

2009-03-25 Thread Ben Finney
Ben Finney writes: > I've submitted PEP 3143 > http://www.python.org/dev/peps/pep-3143/> to meet this need, > and have re-worked an existing library into a new ‘python-daemon’ > http://pypi.python.org/pypi/python-daemon/> library, the > reference implementation. > > Now I need wider testing and

Re: PEP 3143: Standard daemon process library

2009-03-24 Thread Ben Finney
> > >Isn't setting the EUID and EGID something that is just as easily > >done *after* the program achieves a daemon process? > > That depends. > > If you mean that one can ignore the uid and gid setting features of the > proposed library so that they are not chan

Re: PEP 3143: Standard daemon process library

2009-03-24 Thread Floris Bruynooghe
On Mar 21, 11:06 pm, Ben Finney wrote: > Floris Bruynooghe writes: > > Had a quick look at the PEP and it looks very nice IMHO. > > Thank you. I hope you can try the implementation and report feedback > on that too. > > > One of the things that might be interesting is keeping file > > descriptors

Re: PEP 3143: Standard daemon process library

2009-03-24 Thread Jean-Paul Calderone
which gives out user shells. That sounds rather more specific than is needed for the generic library being proposed here. I'm wary of adding features to an API that is already quite complex. Isn't setting the EUID and EGID something that is just as easily done *after* the program achieve

Re: PEP 3143: Standard daemon process library

2009-03-23 Thread Ben Finney
ad of > uid and gid. This is necessary, for example, to write an SSH daemon > which gives out user shells. That sounds rather more specific than is needed for the generic library being proposed here. I'm wary of adding features to an API that is already quite complex. Isn&#x

Re: PEP 3143: Standard daemon process library

2009-03-21 Thread Jean-Paul Calderone
On Sun, 22 Mar 2009 10:19:58 +1100, Ben Finney wrote: Jean-Paul Calderone writes: The biggest shortcoming seems to be a complete lack of unit tests. A full unit test suite is in the source distribution's ‘tests/’ directory. You can run it with ‘python ./setup.py test’. Of course this is

Re: PEP 3143: Standard daemon process library

2009-03-21 Thread Ben Finney
Jean-Paul Calderone writes: > The biggest shortcoming seems to be a complete lack of unit tests. A full unit test suite is in the source distribution's ‘tests/’ directory. You can run it with ‘python ./setup.py test’. > A quick skim of the code suggests that part of it don't even work at > all

Re: PEP 3143: Standard daemon process library

2009-03-21 Thread Ben Finney
Floris Bruynooghe writes: > Had a quick look at the PEP and it looks very nice IMHO. Thank you. I hope you can try the implementation and report feedback on that too. > One of the things that might be interesting is keeping file > descriptors from the logging module open by default. Hmm. I see

Re: PEP 3143: Standard daemon process library (was: Writing a well-behaved daemon)

2009-03-20 Thread Floris Bruynooghe
On Mar 20, 9:58 am, Ben Finney wrote: > Ben Finney writes: > > Writing a Python program to become a Unix daemon is relatively > > well-documented: there's a recipe for detaching the process and > > running in its own process group. However, there's much more to a > > Unix daemon than simply detac

Re: PEP 3143: Standard daemon process library

2009-03-20 Thread Jean-Paul Calderone
On Fri, 20 Mar 2009 21:47:00 +1100, Ben Finney wrote: [snip] Somewhat by accident I noticed this other part of the PEP: Other Python daemon implementations that differ from this PEP: [snip] * Twisted [twisted]_ includes, perhaps unsurprisingly, an implementation of a process daemonisat

Re: PEP 3143: Standard daemon process library (was: Writing a well-behaved daemon)

2009-03-20 Thread Jean-Paul Calderone
On Fri, 20 Mar 2009 20:58:58 +1100, Ben Finney wrote: Ben Finney writes: Writing a Python program to become a Unix daemon is relatively well-documented: there's a recipe for detaching the process and running in its own process group. However, there's much more to a Unix daemon than simply de

Re: PEP 3143: Standard daemon process library

2009-03-20 Thread Ben Finney
Now I need wider testing and scrutiny of the implementation and > specification. PEP: 3143 Title: Standard daemon process library Version: $Revision: 1.1 $ Last-Modified: $Date: 2009-03-19 12:51 $ Author:Ben Finney Status:Draft Ty

PEP 3143: Standard daemon process library (was: Writing a well-behaved daemon)

2009-03-20 Thread Ben Finney
need wider testing and scrutiny of the implementation and specification. One point to note: This is only intended to address the task of a program transforming *itself* into a daemon process. If you want to spawn off *extra* processes and manage them through a “service” channel, you want somethin

writing a message to the terminal in a daemon process

2008-03-23 Thread bharath venkatesh
hi, i created a daemon process using the following code import os import sys # Default daemon parameters. # File mode creation mask of the daemon. UMASK = 0 # Default working directory for the daemon. WORKDIR = "/" # Default maximum for the number of available file descript

Re: pySerial in a daemon process

2007-08-27 Thread Lawrence D'Oliveiro
In message <[EMAIL PROTECTED]>, paul wrote: > Before I had posted this question first thing I did was to look at / > dev/ttyS0, and indeed the group is dialout (gid=20)... What are the full protections on the serial port? That is, can you post the output of ls -l /dev/ttyS0 please? -- htt

Re: pySerial in a daemon process

2007-08-26 Thread paul
On Aug 26, 5:20 pm, Bjoern Schliessmann wrote: > paul wrote: > > If I put these back in and try to run the daemon, the script fails > > when I try to connect to the serial port, with this error: > > serial.serialutil.SerialException: Could not open port: [Errno 13] > > Permission denied: '/dev/tty

Re: pySerial in a daemon process

2007-08-26 Thread Bjoern Schliessmann
paul wrote: > If I put these back in and try to run the daemon, the script fails > when I try to connect to the serial port, with this error: > serial.serialutil.SerialException: Could not open port: [Errno 13] > Permission denied: '/dev/ttyS0' Did you check the permissions on this file? Often yo

pySerial in a daemon process

2007-08-26 Thread paul
I am writing a daemon process that reads data from the serial port / dev/ttyS0. I am using pyserial & the method for setting up a daemon described in "Chris' Python Page" (http://homepage.hispeed.ch/py430/ python/) on an Ubuntu linux pc. Everything works great EXCEPT... i

Re: Making a non-root daemon process

2007-03-24 Thread Ben Finney
Ben Finney <[EMAIL PROTECTED]> writes: > Hmm. I typed the example program in as a simplified version of what > I'm doing; but didn't actually *run* it. When I do run it, I get no > exception, as you say. > > Now I'll have to find out what significant difference there is > between my failing code a

Re: Making a non-root daemon process

2007-03-23 Thread Ben Finney
"Leo Kislov" <[EMAIL PROTECTED]> writes: > On Mar 22, 11:19 pm, Ben Finney <[EMAIL PROTECTED]> wrote: > > The problem I'm having is that 'os.setsid()' fails with 'OSError: > > [Errno 1] Operation not permitted' unless I run the program as the > > root user. This isn't a program that I want necessa

Re: Making a non-root daemon process

2007-03-23 Thread Leo Kislov
On Mar 22, 11:19 pm, Ben Finney <[EMAIL PROTECTED]> wrote: > Howdy all, > > For making a Python program calve off an independent daemon process of > itself, I found Carl J. Schroeder's recipe in the ASPN Python Cookbook. > http://aspn.activestate.com/ASPN/Cookbook/Python/

Making a non-root daemon process

2007-03-22 Thread Ben Finney
Howdy all, For making a Python program calve off an independent daemon process of itself, I found Carl J. Schroeder's recipe in the ASPN Python Cookbook. http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/278731> This is a thorough approach, and I'm cribbing a simpler proc

Re: Creating a daemon process in Python

2007-02-23 Thread Eirikur Hallgrimsson
I didn't actually write this module. I believe I found it in a discussion in ASPN at Active State. Thanks for the input, and when I get a chance I will try these alternate approaches. This module has been working fine for me as is--so far. Eirikur -- http://mail.python.org/mailman/listinfo

Re: Creating a daemon process in Python

2007-02-23 Thread Jean-Paul Calderone
On Fri, 23 Feb 2007 08:30:07 -0600, Nick Craig-Wood <[EMAIL PROTECTED]> wrote: >Eirikur Hallgrimsson <[EMAIL PROTECTED]> wrote: > > [snip] > >> if (not os.fork()): >> # hang around till adopted by init >> ppid = os.getppid() >> while (ppid != 1): >>

Re: Creating a daemon process in Python

2007-02-23 Thread Nick Craig-Wood
Eirikur Hallgrimsson <[EMAIL PROTECTED]> wrote: > def daemonize(): > if (not os.fork()): > # get our own session and fixup std[in,out,err] > os.setsid() > sys.stdin.close() > sys.stdout = NullDevice() > sys.stderr = NullDevice() That doesn't close

Re: Creating a daemon process in Python

2007-02-22 Thread Joshua J. Kugler
Benjamin Niemann wrote: >> What is the easiest way to create a daemon process in Python? Google >> says I should call fork() and other system calls manually, but is >> there no os.daemon() and the like? > You could try > <http://aspn.activestate.com/ASPN/Cookbook/

Re: Creating a daemon process in Python

2007-02-22 Thread Grant Edwards
On 2007-02-22, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: > I understood there is no shortcut function like BSD daemon(). I'll do > it manually using examples from cookbook... Sure would be nice if somebody posted one. ;) -- Grant Edwards grante Yow! Oh, I get

Re: Creating a daemon process in Python

2007-02-22 Thread [EMAIL PROTECTED]
Thanks all, I understood there is no shortcut function like BSD daemon(). I'll do it manually using examples from cookbook... On 2月22日, 午前1:41, Benjamin Niemann <[EMAIL PROTECTED]> wrote: > Hello, > > Sakagami Hiroki wrote: > > What is the easiest way to create

Re: Creating a daemon process in Python

2007-02-21 Thread garrickp
On Feb 21, 3:34 pm, Benjamin Niemann <[EMAIL PROTECTED]> wrote: > That's not a daemon process (which are used to execute 'background services' > in UNIX environments). I had not tested this by running the script directly, and in writing a response, I found out that th

Re: Creating a daemon process in Python

2007-02-21 Thread Benjamin Niemann
[EMAIL PROTECTED] wrote: > On Feb 21, 9:33 am, Eirikur Hallgrimsson <[EMAIL PROTECTED]> > wrote: >> Sakagami Hiroki wrote: >> > What is the easiest way to create a daemon process in Python? > > I've found it even easier to use the built in threading modules

Re: Creating a daemon process in Python

2007-02-21 Thread garrickp
On Feb 21, 9:33 am, Eirikur Hallgrimsson <[EMAIL PROTECTED]> wrote: > Sakagami Hiroki wrote: > > What is the easiest way to create a daemon process in Python? I've found it even easier to use the built in threading modules: import time t1 = time.time() print "t_poc.

Re: Creating a daemon process in Python

2007-02-21 Thread Eirikur Hallgrimsson
Sakagami Hiroki wrote: > Hi, > > What is the easiest way to create a daemon process in Python? I find that this works great. I just pasted my copy, I think you can find it via Google. Eirikur # Daemon Module - basic facilities for becoming a daemon process # By Coy Krill # Combi

Re: Creating a daemon process in Python

2007-02-21 Thread Benjamin Niemann
Hello, Sakagami Hiroki wrote: > What is the easiest way to create a daemon process in Python? Google > says I should call fork() and other system calls manually, but is > there no os.daemon() and the like? You could try <http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/2

Creating a daemon process in Python

2007-02-21 Thread Sakagami Hiroki
Hi, What is the easiest way to create a daemon process in Python? Google says I should call fork() and other system calls manually, but is there no os.daemon() and the like? Regards, -- Sakagami Hiroki -- http://mail.python.org/mailman/listinfo/python-list

Re: Python daemon process

2006-08-29 Thread Thomas Dybdahl Ahle
>> >> I know about the atexit module, but in java, you could make a process a >> daemon process, and it would only run as long as the real processes ran. I >> think this is a better way to stop gnuchess, as you are 100% sure, that >> it'll stop. >> >> Ca

Re: Python daemon process

2006-08-27 Thread Paolo Pantaleo
2006/8/26, Thomas Dybdahl Ahle <[EMAIL PROTECTED]>: > Hi, I'm writing a program, using popen4(gnuchess), > The problem is, that gnuchess keeps running after program exit. > > I know about the atexit module, but in java, you could make a process a > daemon process, and it

Re: Python daemon process

2006-08-26 Thread faulkner
ld make a process a > daemon process, and it would only run as long as the real processes ran. I > think this is a better way to stop gnuchess, as you are 100% sure, that > it'll stop. > > Can you do this with popen? > > -- > Thomas -- http://mail.python.org/mailman/listinfo/python-list

Python daemon process

2006-08-26 Thread Thomas Dybdahl Ahle
Hi, I'm writing a program, using popen4(gnuchess), The problem is, that gnuchess keeps running after program exit. I know about the atexit module, but in java, you could make a process a daemon process, and it would only run as long as the real processes ran. I think this is a better way to