def read_toc(device, fast_toc=False):
"""
Return cdrdao-generated table of contents for 'device'.
"""
# cdrdao MUST be passed a non-existing filename as its last argument
# to write the TOC to; it does not support writing to stdout or
# overwriting an existing file, nor does linux seem to support
# locking a non-existant file. Thus, this race-condition introducing
# hack is carried from morituri to whipper and will be removed when
# cdrdao is fixed.
fd, tocfile = tempfile.mkstemp(suffix=u'.cdrdao.read-toc.whipper')
os.close(fd)
os.unlink(tocfile)
cmd = [CDRDAO, 'read-toc'] + (['--fast-toc'] if fast_toc else []) + [
'--device', device, tocfile]
# PIPE is the closest to >/dev/null we can get
logger.debug("executing %r", cmd)
p = Popen(cmd, stdout=PIPE, stderr=PIPE)
_, stderr = p.communicate()
if p.returncode != 0:
msg = 'cdrdao read-toc failed: return code is non-zero: ' + \
str(p.returncode)
logger.critical(msg)
# Gracefully handle missing disc
if "ERROR: Unit not ready, giving up." in stderr:
raise EjectError(device, "no disc detected")
raise IOError(msg)
toc = TocFile(tocfile)
toc.parse()
os.unlink(tocfile)
return toc
# hack is carried from morituri to whipper and will be removed when
# cdrdao is fixed.
fd, tocfile = tempfile.mkstemp(suffix=u'.cdrdao.read-toc.whipper')
os.close(fd)
os.unlink(tocfile)
cmd = [CDRDAO, 'read-toc'] + (['--fast-toc'] if fast_toc else
[]) + ['--device', device, tocfile]
# PIPE is the closest to >/dev/null we can get
try:
check_call(cmd, stdout=PIPE, stderr=PIPE)
except CalledProcessError, e:
logging.warning('cdrdao read-toc failed: return code is non-zero: ' +
str(e.returncode))
raise e
toc = TocFile(tocfile)
toc.parse()
os.unlink(tocfile)
return toc
def version():
"""
Return cdrdao version as a string.
"""
cdrdao = Popen(CDRDAO, stderr=PIPE)
out, err = cdrdao.communicate()
if cdrdao.returncode != 1:
logging.warning("cdrdao version detection failed: "
"return code is " + str(cdrdao.returncode))
return None
# hack is carried from morituri to whipper and will be removed when
# cdrdao is fixed.
fd, tocfile = tempfile.mkstemp(suffix=u'.cdrdao.read-toc.whipper')
os.close(fd)
os.unlink(tocfile)
cmd = [CDRDAO, 'read-toc'] + (['--fast-toc'] if fast_toc else []) + [
'--device', device, tocfile]
# PIPE is the closest to >/dev/null we can get
try:
check_call(cmd, stdout=PIPE, stderr=PIPE)
except CalledProcessError, e:
logger.warning('cdrdao read-toc failed: return code is non-zero: ' +
str(e.returncode))
raise e
toc = TocFile(tocfile)
toc.parse()
os.unlink(tocfile)
return toc
def version():
"""
Return cdrdao version as a string.
"""
cdrdao = Popen(CDRDAO, stderr=PIPE)
out, err = cdrdao.communicate()
if cdrdao.returncode != 1:
logger.warning("cdrdao version detection failed: "
"return code is " + str(cdrdao.returncode))
return None
m = re.compile(r'^Cdrdao version (?P<version>.*) - \(C\)').search(