[Pkg-alsa-devel] Bug#638369: alsa-utils: Seems to do strange things to stdin after upgrade to 1.0.24

[Marc-Jano Knopp]

Package: alsa-utils
Version: 1.0.24.2-1
Severity: normal

In alsa-utils 1.0.23-5+b1, the following works:
(Instead of /dev/null, you can also pick a WAV file)

------- snip -------
$ aplay -q /dev/null; read -p "Enter number: "
aplay: playback:2372: read error
Enter number: ^C   (I hit Ctrl-C here)
$
------- snip -------


As of alsa-utils 1.0.24.2-1, this does not work anymore:

------- snip -------
$ aplay -q /dev/null; read -p "Enter number: " 
aplay: playback:2455: read error
Enter number: bash: read: read error: 0: Resource temporarily unavailable
$ echo $?
1
$
------- snip -------

aplay seems to do something strange with stdin.

There are also other programs that seem to behave in the same way, see
bug #638072 about "vzctl". Maybe that could be an indication that the
actual culprit is libreadline (currently installed: libreadline6 6.2-2
and bash 4.1-3) -- I can reproduce the behavior of alsa-utils 1.0.23
and 1.0.24 without changing libreadline, but maybe the newer
alsa-utils just triggers a libreadline bug.

The file

  /usr/share/doc/alsa-utils/changelog.gz

for 1.0.24 lists this:

  aplay/arecord: Added hardware pause support (press SPACE or Enter)

Maybe this introduced the described problem.

-- System Information:
Debian Release: wheezy/sid
  APT prefers testing
  APT policy: (500, 'testing'), (50, 'unstable'), (25, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 3.0.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.ISO-8859-15, LC_CTYPE=en_US.ISO-8859-15 (charmap=ISO-8859-15)
Shell: /bin/sh linked to /bin/dash

Versions of packages alsa-utils depends on:
ii  dialog                    1.1-20110707-1 Displays user-friendly dialog boxe
ii  libasound2                1.0.24.1-2     shared library for ALSA applicatio
ii  libc6                     2.13-10        Embedded GNU C Library: Shared lib
ii  libncursesw5              5.9-1          shared libraries for terminal hand
ii  linux-sound-base          1.0.23+dfsg-4  base package for ALSA and OSS soun
ii  lsb-base                  3.2-27         Linux Standard Base 3.2 init scrip
ii  module-init-tools         3.16-1         tools for managing Linux kernel mo
ii  udev                      172-1          /dev/ and hotplug management daemo
ii  whiptail                  0.52.11-2.1    Displays user-friendly dialog boxe

Versions of packages alsa-utils recommends:
ii  alsa-base                  1.0.23+dfsg-4 ALSA driver configuration files
ii  pciutils                   1:3.1.7-12    Linux PCI Utilities

alsa-utils suggests no packages.

-- no debconf information