At last - the password bug is found

There has been a very elusive bug around in the PostgreSQL client since 8.0 (at least) on win32. In some cases (until now unidentified) password authentication in psql stopped working, and just errored out with a message indicating the wrong password was used. And nobody has found the cause...

... until now, that is. Seems Robert Kinberg finally nailed it. At least, I firmly beleive that the bug he did identify is the one responsible for most of these reports.

Turns out that if you have a directory called \dev on the same drive you run psql from (normally c:, but that can differ), psql will attempt to use a file called /dev/tty. On Unix, this is common behaviour - we want to be sure we read the password from a tty. On windows, it just breaks - the first time, we will write the prompt into the file, and on later runs we will read back the prompt and use it as a password.

The fix is simple, just two lines changed and then two added #ifdefs. The fix is scheduled to go into 8.1.4 and 8.0.8. It's not actually approved and committed yet, but I see no reason why it won't be :-)

If you're having this problem today, check for dev directories in your root, and remove/rename/removepermissions that directory, and things should be back to normal.

So, big thanks to Robert for identifying this and suggesting the fix!


Conferences

I speak at and organize conferences around Open Source in general and PostgreSQL in particular.

Upcoming

SCALE+PGDays
Mar 2-5, 2017
Pasadena, California, USA
Open Source Infrastructure @ SCALE
Mar 2, 2017
Pasadena, California, USA
Confoo Montreal 2017
Mar 8-10, 2017
Montreal, Canada
Nordic PGDay 2017
Mar 21, 2017
Stockholm, Sweden
pgDay.paris 2017
Mar 23, 2017
Paris, France
PGCon 2017
May 23-26, 2017
Ottawa, Canada

Past

FOSDEM + PGDay 2017
Feb 2-4, 2017
Brussels, Belgium
PGConf.Asia 2016
Dec 2-3, 2016
Tokyo, Japan
Berlin PUG
Nov 17, 2016
Berlin, Germany
PGConf.EU 2016
Nov 1-4, 2016
Tallinn, Estonia
Stockholm PUG 2016/5
Oct 25, 2016
Stockholm, Sweden
More past conferences