Edgewall Software

Opened 15 years ago

Last modified 7 years ago

#5121 new defect

trac-admin tool stdout flush problem

Reported by: oren@… Owned by:
Priority: normal Milestone: unscheduled
Component: admin/console Version:
Severity: minor Keywords: autoflush flush
Cc: oren@… Branch:
Release Notes:
API Changes:
Internal Changes:


"autoflush" is disabled, and thus when trying to hotcopy to a bad directory I get the following message (note the bad chronological order of the lines):

www-data@web:~$ trac-admin /data/trac/dirstat hotcopy /tmp/bla
Command failed: [Errno 17] File exists: '/tmp/bla'
Hotcopying /data/trac/dirstat to /tmp/bla ...

I'd suggest modifying the shebang line of trac-admin to "#!/usr/bin/python -u" in order to solve this. (attached as a micro-patch)

Attachments (1)

trac-admin.patch (346 bytes ) - added by oren@… 15 years ago.
Patch to address an autoflush issue

Download all attachments as: .zip

Change History (7)

by oren@…, 15 years ago

Attachment: trac-admin.patch added

Patch to address an autoflush issue

comment:1 by Christian Boos, 15 years ago

The shebang trick won't work on windows, so if the problem also shows up there (will try), the proposed fix is not OK.

comment:2 by Jeffrey Hulten <jeffh@…>, 15 years ago

You need someone to try and replicate this on Windows?

comment:3 by oren@…, 15 years ago

Yes please!

comment:4 by Remy Blank, 14 years ago

Milestone: 1.0
Severity: normalminor

Instead of using python -u on the shebang line, the following article has several other solutions:


In particular, the following solutions make the most sense to me:

  • sys.stdout = os.fdopen(sys.stdout.fileno(), 'w', 0)
  • Call sys.stdout.flush() after every write(). This could be done either in trac.admin.console.printout() or directly in trac.util.text.console_print().

comment:5 by Christian Boos, 12 years ago

Milestone: 1.0unscheduled

Milestone 1.0 deleted

comment:6 by Ryan J Ollos, 7 years ago

Owner: Christopher Lenz removed

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