apt-get does not run in background

[Dan Kegel]

On Ubuntu 12.04.1, with apt-0.8.16~exp12ubuntu10.6

When I run a script that does
   ...
   sudo apt-get -y install cmake

in the background, apt-get hangs. ps -augx | grep apt shows

root 20603 0.9 0.4 38000 29044 pts/1 T 10:14 0:01 apt-get -y install cmake

Attaching with gdb and doing 'bt' says:

#0 0xb775b1b2 in _dl_sysinfo_int80 () from /lib/ld-linux.so.2
#1 0xb74473c3 in __read_nocancel () at ../sysdeps/unix/syscall-template.S:82
#2 0xb76ef403 in pkgDPkgPM::DoStdin(int) ()
   from /usr/lib/i386-linux-gnu/libapt-pkg.so.4.12
#3 0xb76f809e in pkgDPkgPM::Go(int) ()
   from /usr/lib/i386-linux-gnu/libapt-pkg.so.4.12
#4 0xb767e94a in pkgPackageManager::DoInstallPostFork(int) ()
   from /usr/lib/i386-linux-gnu/libapt-pkg.so.4.12
#5 0xb767e9b0 in pkgPackageManager::DoInstall(int) ()
   from /usr/lib/i386-linux-gnu/libapt-pkg.so.4.12

Googling for DoStdin found that this has an upstream bug report already:

http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=555632

Workaround is to redirect stdin.

[Edward Donovan (edward.donovan)]

Hi -

The title says aptitude, but the example is apt-get. Since they're different programs. I guess I'll change the title to apt-get, for clarity.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.