Duplicity does not exit after an OSError

[Claudio Gil]

When backing up a locally mounted cifs share with encryption and an OSError occurs duplicity process does not exit. It does the final actions of removing the unlock file and printing the error but never stops and has a child gpg process hanging.

duplicity: 0.6.24
python: 2.7.3
os: debian wheezy
source fs: locally mounted cifs
target fs: S3

The last two lines of the log are after a "kill -9" to child gpg process. Between those lines and the OSError immediately before several minutes have passed.

[Claudio Gil (m4ktub)]

The attached patch changes GPGWriteFile, in duplicity/gpg.py, to wrap the iteration in a try-exception. This way, in case of error the GPGFile is still closed and the sub process terminates.