[Qemu-devel] [Bug 1596870] [NEW] qemu-img backed over https fails on zero-length file

[Tomáš Golembiovský]

Public bug reported:

When creating new disk with qemu-img backed by file accessed over HTTPS
and the backing file has zero length, qemu-img fails with uninformative
error:

        qemu-img: disk.qcow2: CURL: Error opening file:

The error message should either be improved, or the operation on zero-
length file should be allowed. Some other backends, as e.g. raw backend
for regular files, seem to allow empty files.

** Affects: qemu
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1596870

Title:
  qemu-img backed over https fails on zero-length file

Status in QEMU:
  New

Bug description:
  When creating new disk with qemu-img backed by file accessed over
  HTTPS and the backing file has zero length, qemu-img fails with
  uninformative error:

          qemu-img: disk.qcow2: CURL: Error opening file:

  The error message should either be improved, or the operation on zero-
  length file should be allowed. Some other backends, as e.g. raw
  backend for regular files, seem to allow empty files.

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