I'd like to map an int value pbs_errno
declared as a global in the library libtorque.so
using ctypes.
Currently I can load the library like so:
from ctypes import *
libtorque = CDLL("libtorque.so")
and have successfully mapped a bunch of the functions. However, for error checking purposes many of them set the pbs_errno
variable so I need access to that as well. However if I try to access it I get:
>>> pytorque.libtorque.pbs_errno
<_FuncPtr object at 0x9fc690>
Of course, it's not a function pointer and attempting to call it results in a seg fault.
It's declared as int pbs_errno;
in the main header and extern int pbs_errno;
in the API header files.
Objdump shows the symbol as:
00000000001294f8 g DO .bss 0000000000000004 Base pbs_errno
There's a section in the ctypes docs about accessing values exported in dlls:
http://docs.python.org/library/ctypes.html#accessing-values-exported-from-dlls
eg
def pbs_errno(): return c_int.in_dll(libtorque, "pbs_errno")
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