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@w541:/home/oliver/gits/lvm2/doc# lvremove -f levg/test
Logical volume "test" successfully removed
root@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
/*
* Copyright (C) 2004 Red Hat, Inc. All rights reserved.
*
* This file is part of LVM2.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU General Public License v.2.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "lvm2cmd.h"
#include <stdio.h>
/* All output gets passed to this function line-by-line */
void test_log_fn(int level, const char *file, int line,
int dm_errno, const char *format)
{
/* Extract and process output here rather than printing it */
if (level != 4)
return;
printf("%s\n", format);
return;
}
int main(int argc, char **argv)
{
void *handle;
int r;
lvm2_log_fn(test_log_fn);
handle = lvm2_init();
lvm2_log_level(handle, 4);
// r = lvm2_run(handle, "vgs --reportformat=json levg");
r = lvm2_run(handle, "lvcreate --name test --size 12M levg");
/* More commands here */
lvm2_exit(handle);
return r;
}
_______________________________________________
linux-lvm mailing list
linux-lvm@redhat.com
https://www.redhat.com/mailman/listinfo/linux-lvm
read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
