[linux-lvm] api recommandation (example_cmdlib.c doesnt work properly)?

[Oliver Rath]

Hi list,

i tried to get some lvm-commands working using example_cmdlib.c
(modified, attached). Unfortunatly the example hangs trying a "lvcreate
--name test --size 12M levg" command:

---------------------- snip ---------------------------------

root at w541:/home/oliver/gits/lvm2/doc# lvremove -f levg/test
  Logical volume "test" successfully removed
root at w541:/home/oliver/gits/lvm2/doc# ./example_cmdlib
WARNING: Sum of all thin volume sizes (870,00 GiB) exceeds the size of
thin pools and the amount of free space in volume group (<6,17 GiB).
WARNING: You have not turned on protection against thin pools running
out of space.
WARNING: Set activation/thin_pool_autoextend_threshold below 100 to
trigger automatic extension of thin pools before they get full.

---------------------- snap ---------------------------------

Here the only way to continue is to killall -9 example_cmdlib. If you
like, i can send a strace from the run (300kb). The program was built with

gcc example_cmdlib.c -o example_cmdlib  -llvm2cmd

Whats wrong here? Ist there a better api for communicating from other
programs?

Imho the python support is deprecated, lvm2app is deprecated, dbus-api
is limited at the moment (right? Didnt find documentation for it), so
the only way seems liblvm or call explicit the lvm-tools.

Tfh!

Oliver

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