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Diffstat (limited to 'scripts/external_libs/python-daemon-2.0.5/doc')
| -rw-r--r-- | scripts/external_libs/python-daemon-2.0.5/doc/CREDITS | 53 | ||||
| -rw-r--r-- | scripts/external_libs/python-daemon-2.0.5/doc/FAQ | 156 | ||||
| -rw-r--r-- | scripts/external_libs/python-daemon-2.0.5/doc/TODO | 95 | ||||
| -rw-r--r-- | scripts/external_libs/python-daemon-2.0.5/doc/hacking.txt | 180 |
4 files changed, 484 insertions, 0 deletions
diff --git a/scripts/external_libs/python-daemon-2.0.5/doc/CREDITS b/scripts/external_libs/python-daemon-2.0.5/doc/CREDITS new file mode 100644 index 00000000..feb65d5e --- /dev/null +++ b/scripts/external_libs/python-daemon-2.0.5/doc/CREDITS @@ -0,0 +1,53 @@ +Credits for contributors to ‘python-daemon’ +########################################### + +:Updated: 2014-12-23 + +The ‘python-daemon’ library is the work of many contributors. + + +Primary developers +================== + +The library has been maintained over the years by: + +* Ben Finney <ben+python@benfinney.id.au> +* Robert Niederreiter +* Jens Klein + + +Precursors +========== + +The library code base is inherited from prior work by: + +* Chad J. Schroeder +* Clark Evans +* Noah Spurrier +* Jürgen Hermann + + +Additional contributors +======================= + +People who have also contributed substantial improvements: + + + +.. + This is free software: you may copy, modify, and/or distribute this work + under the terms of the Apache License version 2.0 as published by the + Apache Software Foundation. + No warranty expressed or implied. See the file ‘LICENSE.ASF-2’ for details. + +.. + Local variables: + coding: utf-8 + mode: text + mode: rst + time-stamp-format: "%:y-%02m-%02d" + time-stamp-start: "^:Updated:[ ]+" + time-stamp-end: "$" + time-stamp-line-limit: 20 + End: + vim: fileencoding=utf-8 filetype=rst : diff --git a/scripts/external_libs/python-daemon-2.0.5/doc/FAQ b/scripts/external_libs/python-daemon-2.0.5/doc/FAQ new file mode 100644 index 00000000..1fcc4658 --- /dev/null +++ b/scripts/external_libs/python-daemon-2.0.5/doc/FAQ @@ -0,0 +1,156 @@ +‘python-daemon’ Frequently Asked Questions +########################################## + +:Author: Ben Finney <ben+python@benfinney.id.au> +:Updated: 2015-01-10 + +.. contents:: +.. + 1 General + 1.1 What is the purpose of the ‘python-daemon’ library? + 1.2 How can I run a service communicating with a separate daemon process? + 2 Security + 2.1 Why is the umask set to 0 by default? + 3 File descriptors + 3.1 Why does the output stop after opening the daemon context? + 3.2 How can I preserve a ‘logging’ handler's file descriptor? + +General +======= + +What is the purpose of the ‘python-daemon’ library? +--------------------------------------------------- + +The ‘python-daemon’ library has a deliberately narrow focus: that of +being a reference implementation for `PEP 3143`_, “Standard daemon +process library”. + +.. _`PEP 3143`: http://www.python.org/dev/peps/pep-3143 + +How can I run a service communicating with a separate daemon process? +--------------------------------------------------------------------- + +As specified in `PEP 3143`_, the ‘python-daemon’ library is +specifically focussed on the goal of having the *current running +program* become a well-behaved Unix daemon process. This leaves open +the question of how this program is started, or about multiple +programs interacting. As detailed in PEP 3143: + + A daemon is not a service + + There is a related concept in many systems, called a “service”. A + service differs from the model in this PEP, in that rather than + having the *current* program continue to run as a daemon process, + a service starts an *additional* process to run in the background, + and the current process communicates with that additional process + via some defined channels. + + The Unix-style daemon model in this PEP can be used, among other + things, to implement the background-process part of a service; but + this PEP does not address the other aspects of setting up and + managing a service. + +A possible starting point for such a “service” model of execution is +in a `message from 2009-01-30`_ to the ``python-ideas`` forum. + +.. _`message from 2009-01-30`: http://mail.python.org/pipermail/python-ideas/2009-January/002606.html + + +Security +======== + +Why is the umask set to 0 by default? +------------------------------------- + +A daemon should not rely on the parent process's umask value, which is +beyond its control and may prevent creating a file with the required +access mode. So when the daemon context opens, the umask is set to an +explicit known value. + +If the conventional value of 0 is too open, consider setting a value +such as 0o022, 0o027, 0o077, or another specific value. Otherwise, +ensure the daemon creates every file with an explicit access mode for +the purpose. + + +File descriptors +================ + +Why does the output stop after opening the daemon context? +---------------------------------------------------------- + +The specified behaviour in `PEP 3143`_ includes the requirement to +detach the process from the controlling terminal (to allow the process +to continue to run as a daemon), and to close all file descriptors not +known to be safe once detached (to ensure any files that continue to +be used are under the control of the daemon process). + +If you want the process to generate output via the system streams +‘sys.stdout’ and ‘sys.stderr’, set the ‘DaemonContext’'s ‘stdout’ +and/or ‘stderr’ options to a file-like object (e.g. the ‘stream’ +attribute of a ‘logging.Handler’ instance). If these objects have file +descriptors, they will be preserved when the daemon context opens. + +How can I preserve a ‘logging’ handler's file descriptor? +--------------------------------------------------------- + +The ‘DaemonContext.open’ method conforms to `PEP 3143`_ by closing all +open file descriptors, but excluding those files specified in the +‘files_preserve’ option. This option is a list of files or file +descriptors. + +The Python standard library ‘logging’ module provides log handlers +that write to streams, including to files via the ‘StreamHandler’ +class and its sub-classes. The documentation (both the online `logging +module documentation`_ and the docstrings for the code) makes no +mention of a way to get at the stream associated with a handler +object. + +However, looking at the source code for ‘StreamHandler’, in Python 2.5 +as ``/usr/lib/python2.5/logging/__init__.py``, shows a ‘stream’ +attribute that is bound to the stream object. The attribute is not +marked private (i.e. it is not named with a leading underscore), so we +can presume it is part of the public API. + +That attribute can then be used to specify that a logging handler's +file descriptor should, when the ‘DaemonContext’ opens, be excluded +from closure:: + + import logging + import daemon + + # any subclass of StreamHandler should provide the ‘stream’ attribute. + lh = logging.handlers.TimedRotatingFileHandler( + "/var/log/foo.log", + # … + ) + + # … do some logging and other activity … + + daemon_context = daemon.DaemonContext() + daemon_context.files_preserve = [lh.stream] + + daemon_context.open() + + # … continue as a daemon process … + +.. _`logging module documentation`: http://docs.python.org/library/logging + + +.. + This is free software: you may copy, modify, and/or distribute this work + under the terms of the Apache License version 2.0 as published by the + Apache Software Foundation. + No warranty expressed or implied. See the file ‘LICENSE.ASF-2’ for details. + +.. + Local variables: + coding: utf-8 + mode: text + mode: rst + time-stamp-format: "%:y-%02m-%02d" + time-stamp-start: "^:Updated:[ ]+" + time-stamp-end: "$" + time-stamp-line-limit: 20 + End: + vim: fileencoding=utf-8 filetype=rst : diff --git a/scripts/external_libs/python-daemon-2.0.5/doc/TODO b/scripts/external_libs/python-daemon-2.0.5/doc/TODO new file mode 100644 index 00000000..81b41481 --- /dev/null +++ b/scripts/external_libs/python-daemon-2.0.5/doc/TODO @@ -0,0 +1,95 @@ +TODO for ‘python-daemon’ library +################################ + +:Updated: 2015-01-10 + +======= +PENDING +======= + +Tests +===== + +Libraries +========= + +* Evaluate switching to ‘flufl.lock’ library for PID lockfile behaviour + <http://pypi.python.org/pypi/flufl.lock>_. + +Features +======== + +Important +--------- + +Wishlist +-------- + +* Allow specification of a syslog service name to log as (default: + output to stdout and stderr, not syslog). + +Documentation +============= + +Standard library inclusion +========================== + + +==== +DONE +==== + +* Convert to Python 2 and Python 3 compatible code base. + +* Work correctly with current ‘lockfile’ library (0.10 or later). + +* Write full unit tests for every new or changed behaviour at time of + commit. + +* Detect whether started by another process that handles + daemonisation, such as ‘inetd’, and behave appropriately. + +* Detach to new process and session group. + +* Allow specification of working directory (default: '/'). + +* Allow specification of umask (default: 0o000). + +* Drop ‘suid’ and ‘sgid’ privileges if set. + +* Close all open file handles. + +* Re-open stdin, stdout, stderr to user-specified files. + +* Default re-open stdin, stdout, stderr to ‘/dev/null’. + +* Allow specification of a non-root user and group to drop to, if + started as ‘root’ (default: no change of user or group). + +* Implement context manager protocol for daemon context. + +* Allow specification of PID file with its own context manager + (default: no PID file). + +* Full docstrings for functions, classes, and modules. + +* PEP 3143 for adding this library to the Python standard library. + + +.. + This is free software: you may copy, modify, and/or distribute this work + under the terms of the Apache License version 2.0 as published by the + Apache Software Foundation. + No warranty expressed or implied. See the file ‘LICENSE.ASF-2’ for details. + +.. + Local variables: + coding: utf-8 + mode: text + mode: rst + time-stamp-format: "%:y-%02m-%02d" + time-stamp-start: "^:Updated:[ ]+" + time-stamp-end: "$" + time-stamp-line-limit: 20 + End: + vim: fileencoding=utf-8 filetype=rst : diff --git a/scripts/external_libs/python-daemon-2.0.5/doc/hacking.txt b/scripts/external_libs/python-daemon-2.0.5/doc/hacking.txt new file mode 100644 index 00000000..9484dbd0 --- /dev/null +++ b/scripts/external_libs/python-daemon-2.0.5/doc/hacking.txt @@ -0,0 +1,180 @@ +Developer's guide +################# + +:Author: Ben Finney <ben+python@benfinney.id.au> +:Updated: 2014-11-28 + + +Project layout +============== + +:: + + ./ Top level of source tree + doc/ Project documentation + bin/ Executable programs + daemon/ Main ‘daemon’ library + test/ Unit tests + + +Code style +========== + +Python +------ + +All Python code should conform to the guidelines in PEP8_. In +particular: + +* Indent each level using 4 spaces (``U+0020 SPACE``), and no TABs + (``U+0008 CHARACTER TABULATION``). + +* Name modules in lower case, ``multiplewordslikethis``. + +* Name classes in title case, ``MultipleWordsLikeThis``. + +* Name functions, instances and other variables in lower case, + ``multiple_words_like_this``. + +* Every module, class, and function has a Python doc string explaining + its purpose and API. + + *Exception*: Functions whose purpose and API are mandated by Python + itself (dunder-named methods) do not need a doc string. + +* Doc strings are written as triple-quoted strings. + + * The text of the doc string is marked up with reStructuredText. + + * The first line is a one-line synopsis of the object. This summary + line appears on the same line as the opening triple-quote, + separated by a single space. + + * Further lines, if needed, are separated from the first by one + blank line. + + * The synopsis is separated by one space from the opening + triple-quote; this causes it to appear four columns past the + beginning of the line. All subsequent lines are indented at least + four columns also. + + * The synopsis is followed by a reStructuredText field list. The + field names are: “param foo” for each parameter (where “foo” is + the parameter name), and “return” for the return value. The field + values describe the purpose of each. + + * The closing triple-quote appears on a separate line. + + Example:: + + def frobnicate(spam, algorithm="dv"): + """ Perform frobnication on ``spam``. + + :param spam: A travortionate (as a sequence of strings). + :param algorithm: The name of the algorithm to use for + frobnicating the travortionate. + :return: The frobnicated travortionate, if it is + non-empty; otherwise None. + + The frobnication is done by the Dietzel-Venkman algorithm, + and optimises for the case where ``spam`` is freebled and + agglutinative. + + """ + spagnify(spam) + # … + +* All ``import`` statements appear at the top of the module. + +* Each ``import`` statement imports a single module, or multiple names + from a single module. + + Example:: + + import sys + import os + from spam import foo, bar, baz + +.. _PEP8: http://www.python.org/dev/peps/pep-0008/ + +Additional style guidelines: + +* All text files (including program code) are encoded in UTF-8. + +* A page break (``U+000C FORM FEED``) whitespace character is used + within a module to break up semantically separate areas of the + module. + +* Editor hints for Emacs and Vim appear in a comment block at the + file's end:: + + + # Local variables: + # coding: utf-8 + # mode: python + # End: + # vim: fileencoding=utf-8 filetype=python : + + +Unit tests +========== + +All code should aim for 100% coverage by unit tests. New code, or +changes to existing code, will only be considered for inclusion in the +development tree when accompanied by corresponding additions or +changes to the unit tests. + +Test-driven development +----------------------- + +Where possible, practice test-driven development to implement program +code. + +* During a development session, maintain a separate window or terminal + with the unit test suite for the project running continuously, or + automatically every few seconds. + +* Any time a test is failing, the only valid change is to make all + tests pass. + +* Develop new interface features (changes to the program unit's + behaviour) only when all current tests pass. + +* Refactor as needed, but only when all tests pass. + + * Refactoring is any change to the code which does not alter its + interface or expected behaviour, such as performance + optimisations, readability improvements, modularisation + improvements etc. + +* Develop new or changed program behaviour by: + + * *First* write a single, specific test case for that new behaviour, + then watch the test fail in the absence of the desired behaviour. + + * Implement the minimum necessary change to satisfy the failing + test. Continue until all tests pass again, then stop making + functional changes. + + * Once all tests (including the new test) pass, consider refactoring + the code and the tests immediately, then ensure all the tests pass + again after any changes. + + * Iterate for each incremental change in interface or behaviour. + +Test-driven development is not absolutely necessary, but is the +simplest, most direct way to generate the kind of program changes +accompanied by unit tests that are necessary for inclusion in the +project. + + +.. + Local variables: + coding: utf-8 + mode: rst + time-stamp-format: "%:y-%02m-%02d" + time-stamp-start: "^:Updated:[ ]+" + time-stamp-end: "$" + time-stamp-line-limit: 20 + End: + vim: fileencoding=utf-8 filetype=rst : |