Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: python-apt (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1306543
Title:
python3.4 breaks installing deb files
Status in App Grid:
Fix Released
Status in Aptdaemon:
New
Status in python-apt package in Ubuntu:
Confirmed
Status in software-center package in Ubuntu:
Fix Released
Bug description:
[If you're facing this issue, please use bug 1290228 , so that we can
use this bug for the implementation of the fix - thanks!]
Steps to reproduce:
- run trusty (updated sometime in the last ~month)
- open ?any? deb file with an aptdaemon client (software-center, appgrid, etc)
- installation will fail (bug 1290228 etc)
After trailing through aptdaemon and python-apt code it seems that there
might be multiple manifestations of this bug
python-apt: progress/base.py: InstallProgress.run()
>>> os._exit(os.spawnlp(os.P_WAIT, "dpkg", "dpkg", "--status-fd",
str(self.write_stream.fileno()), "-i", obj))
aptdaemon: progress.py: DaemonDpkgInstallProgress._child()
>>> args = [apt_pkg.config["Dir::Bin::DPkg"], "--status-fd",
str(self.status_child_fd)] #(...)
>>> os.execlp(apt_pkg.config["Dir::Bin::DPkg"], *args)
I think there are likely to be other points of failure too.
Noteworthy is the following:
pgg@four:~$ sudo python3.4 -c "import os; (statusfd, writefd) = os.pipe();
write_stream = os.fdopen(writefd, 'w'); print(write_stream.fileno()); r =
os.execlp('/usr/bin/dpkg', '/usr/bin/dpkg', '--status-fd',
str(write_stream.fileno()), '-i',
'/home/pgg/Downloads/appgrid_0.1.100~trusty_all.deb'); print(r)"
4
dpkg: error: unable to read filedescriptor flags for <package status and
progress file descriptor>: Bad file descriptor
pgg@four:~$ sudo python3.3 -c "import os; (statusfd, writefd) = os.pipe();
write_stream = os.fdopen(writefd, 'w'); print(write_stream.fileno()); r =
os.execlp('/usr/bin/dpkg', '/usr/bin/dpkg', '--status-fd',
str(write_stream.fileno()), '-i',
'/home/pgg/Downloads/appgrid_0.1.100~trusty_all.deb'); print(r)"
4
(Reading database ... 227994 files and directories currently installed.)
Preparing to unpack .../appgrid_0.1.100~trusty_all.deb (etc, installs
properly)
This lead me to http://legacy.python.org/dev/peps/pep-0446/ which
means that file descriptors can't be inherited in python 3.4.
My knowledge of python-apt and aptdaemon isn't really good enough to
know what the best way forward is to resolve this in the least
disruptive and safest way, but it would be nice if people could
install deb files in 14.04. I've subscribed a few people who might
have ideas.
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