Issue 1606233: readline on popen3 file returns empty string before end (original) (raw)

Created on 2006-11-30 17:51 by wayfarer3130, last changed 2022-04-11 14:56 by admin. This issue is now closed.

Messages (4)
msg61044 - (view)	Author: Bill Wallace (wayfarer3130)	Date: 2006-11-30 17:51
When readline encounters some binary data (I'm not sure which character causes this) in a stream opened with popen3, it returns the empty string indicating end of file BEFORE the file is actually finished. This causes programs to terminate early. The exact same file as a local file opened in "r" mode does not have this behaviour. The stream is created using: strm1, strm2, strm3 = popen2.popen3("cvs log") and the problem is that one of the cvs log messages I'm looking at has some garabage data in it - I think it has some unix end of line's, but I'm not sure exactly what causes this. The work-around is to readline another time to see if it returns '' again - this allows it to continue reading successfully. I can attach a portion of the file if that would help, or do an od -x on the section that causes the problem.
msg84587 - (view)	Author: Daniel Diniz (ajaksu2) *	Date: 2009-03-30 17:24
Bill, A short script that is able to reproduce the issue would be very helpful. A unittest-based test that shows the problem would be even better.
msg114913 - (view)	Author: Mark Lawrence (BreamoreBoy) *	Date: 2010-08-25 14:28
This won't go forward unless there is a patch with changes to code, unit tests and if needed docs.
msg393269 - (view)	Author: Irit Katriel (iritkatriel) *	Date: 2021-05-08 17:19
Closing as there is little chance we can do anything about a 15-year old issue with no reproducer (chances are it was already fixed by now if it was actually a bug).