From: Neal Becker (ndbecker2_at_gmail.com)
Date: Wed Jan 30 2008 - 04:06:38 PST
In the ctypes wrapper I just sent, there are a couple of small issues.
Here is the loop I used (python version of cr_checkpoint.c)
with open ("checkpoint", 'w') as cp_file:
cr_args.cr_fd = cp_file.fileno()
err,cr_handle = request_checkpoint (cr_args, cr_handle)
err = -1
while (err < 0):
err = libcr.cr_poll_checkpoint (byref(cr_handle), POINTER(timeval_t)
())
print "err:", os.strerror(err)
if (err < 0):
if (errno == EINVAL):
break # restarted
elif (errno == EINTR):
continue
else:
die ("cr_poll_checkpoint")
elif (err == 0):
die ("cr_poll_checkpoint returned unexpected 0")
On restart, I get:
cr_restart checkpoint
err: Unknown error 18446744073709551615
---------------------------------------------------------------------------
IOError Traceback (most recent call last)
/home/nbecker/idma-cdma/test/<ipython console> in <module>()
/usr/tmp/python-m9AicK.py in <module>()
IOError: [Errno 9] Bad file descriptor
Looks like 2 errors:
1) On restart, the "print err" statement is executed and seems to print a
garbage value
2) Looks like on restart closing the fd is a bad idea