[Qemu-devel] [Bug 1771570] Re: qemu-aarch64 $program > $file doesn't pipe output to file in 2.12.0

[Juho Hiltunen]

Running "unbuffer qemu-aarch64 $program > $file" allows to pipe the
output.

Is it intentional that I need to disable buffering to allow piping to
other processes? If yes, this issue can be closed.

further reading about unbuffer:
https://unix.stackexchange.com/questions/25372/turn-off-buffering-in-
pipe#25378

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https://bugs.launchpad.net/bugs/1771570

Title:
  qemu-aarch64 $program  > $file doesn't pipe output to file in 2.12.0

Status in QEMU:
  New

Bug description:
  Running qemu-aarch64 $program > $file doesn't pipe anything to $file.
  The file is created but empty.

  qemu-aarch64 --help > $file works, so piping output in my system seems to 
work.
  qemu-x86_64 $program > $file works, too.

  I'm running version 2.12.0 build from source with ./configure && make

  Output of uname -a:
  Linux zhostname>  4.4.0-101-generic #124-Ubuntu SMP Fri Nov 10 18:29:59 UTC 
2017 x86_64 x86_64 x86_64 GNU/Linux

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