#20815: daemonize.py: unbuffered text IO error (python3)
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Reporter: alex01@… | Owner: nobody
Type: Bug | Status: new
Component: Python 3 | Version: master
Severity: Normal | Resolution:
Keywords: python3 runfcgi open | Triage Stage: Accepted
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
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Comment (by dk+django@…):
Replying to [comment:1 claudep]:
> Maybe someone more knowledgeable about buffered/unbuffered output may
chime in to enlighten us?
Change it to
{{{open( out_log, 'a+', 1)}}}
This buffers up to the next EOL, which makes sense for log files. (Same
for {{{err_log}}})
As per [https://docs.python.org/3/library/functions.html#open Python3
docs]:
> buffering is an optional integer used to set the buffering policy. Pass
0 to switch buffering off (only allowed in binary mode), 1 to select line
buffering (only usable in text mode)
Looking at [https://docs.python.org/2/library/functions.html#open open()
in Python2], line buffering should also work:
- If something goes wrong while writing to {{{out_log}}}, you get an
exception
- I haven't yet seen {{{traceback}}} failing in the middle of a line, so
it is probably also safe for {{{err_log}}}
Hope this helps.
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Ticket URL: <https://code.djangoproject.com/ticket/20815#comment:4>
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