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#!/usr/bin/python
import ctypes
import ctypes.util
api = ctypes.CDLL("libgfapi.so")
api.glfs_get_volfile.argtypes = [ctypes.c_void_p,
ctypes.c_void_p,
ctypes.c_ulong]
api.glfs_get_volfile.restype = ctypes.c_long
def get_volfile(host, volume):
# This is set to a large value to exercise the "buffer not big enough"
# path. More realistically, you'd just start with a huge buffer.
BUF_LEN = 0
fs = api.glfs_new(volume)
# api.glfs_set_logging(fs,"/dev/stderr",7)
api.glfs_set_volfile_server(fs, "tcp", host, 24007)
api.glfs_init(fs)
vbuf = ctypes.create_string_buffer(BUF_LEN)
vlen = api.glfs_get_volfile(fs, vbuf, BUF_LEN)
if vlen < 0:
vlen = BUF_LEN - vlen
vbuf = ctypes.create_string_buffer(vlen)
vlen = api.glfs_get_volfile(fs, vbuf, vlen)
api.glfs_fini(fs)
if vlen <= 0:
return vlen
return vbuf.value[:vlen]
if __name__ == "__main__":
import sys
try:
res = apply(get_volfile, sys.argv[1:3])
except:
print "fetching volfile failed (volume not started?)"
try:
for line in res.split('\n'):
print line
except:
print "bad return value %s" % res
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