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"""
Python wrapper for dd, usually to create large empty disk image
"""
import subprocess
def create_file(ifile, ofile, bs, count, timeout):
"""
Create or overwrite a file using dd.
As with dd:
- ifile: inputfile
- ofile: outputfile
- bs: size of block
- count: how many blocks should be written
- timeout: make the operation timeout after amount of seconds
"""
dd_output = subprocess.run(["/usr/bin/dd",
"if=" + ifile,
"of=" + ofile,
"bs=" + bs,
"count=" + count],
check=True,
timeout=timeout,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
universal_newlines=True,)
return (dd_output.returncode, dd_output.stdout, dd_output.stderr)
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