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import sys, os, errno, platform
# Pass an _empty_ file
if len(sys.argv) != 2:
sys.exit(1)
if not hasattr(os, 'SEEK_DATA'):
# Not available on python 2, or on darwin python 3
# Also Darwin swaps SEEK_DATA/SEEK_HOLE definitions
if platform.system() == "Darwin":
SEEK_DATA = 4
else:
SEEK_DATA = 3 # Valid on Linux, FreeBSD, Solaris
else:
SEEK_DATA = os.SEEK_DATA
# Even if os supports SEEK_DATA or SEEK_HOLE,
# the file system may not, in which case it would report
# current and eof positions respectively.
# Therefore work with an empty file,
# ensuring SEEK_DATA returns ENXIO (no more data)
try:
fd = os.open(sys.argv[1], os.O_RDONLY)
except:
sys.exit(1)
try:
data = os.lseek(fd, 0, SEEK_DATA)
except OSError as e:
if e.errno == errno.ENXIO:
sys.exit(0)
sys.exit(1)
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