image-fuzzer: Use io.StringIO
StringIO.StringIO is not available on Python 3, but io.StringIO is available on both Python 2 and 3. io.StringIO is slightly different from the Python 2 StringIO module, though, so we need bytes coming from subprocess.Popen() to be explicitly decoded. Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-id: 20191016192430.25098-5-ehabkost@redhat.com Message-Id: <20191016192430.25098-5-ehabkost@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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@ -28,7 +28,7 @@ import shutil
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from itertools import count
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import time
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import getopt
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import StringIO
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import io
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import resource
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try:
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@ -84,8 +84,12 @@ def run_app(fd, q_args):
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try:
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out, err = process.communicate()
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signal.alarm(0)
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fd.write(out)
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fd.write(err)
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# fd is a text file, so we need to decode the process output before
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# writing to it.
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# We could be simply using the `errors` parameter of subprocess.Popen(),
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# but this will be possible only after migrating to Python 3
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fd.write(out.decode(errors='replace'))
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fd.write(err.decode(errors='replace'))
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fd.flush()
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return process.returncode
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@ -183,7 +187,7 @@ class TestEnv(object):
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MAX_BACKING_FILE_SIZE) * (1 << 20)
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cmd = self.qemu_img + ['create', '-f', backing_file_fmt,
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backing_file_name, str(backing_file_size)]
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temp_log = StringIO.StringIO()
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temp_log = io.StringIO()
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retcode = run_app(temp_log, cmd)
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if retcode == 0:
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temp_log.close()
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@ -240,7 +244,7 @@ class TestEnv(object):
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"Backing file: %s\n" \
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% (self.seed, " ".join(current_cmd),
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self.current_dir, backing_file_name)
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temp_log = StringIO.StringIO()
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temp_log = io.StringIO()
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try:
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retcode = run_app(temp_log, current_cmd)
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except OSError as e:
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