Re: parted/LVM for ET [Re: [Libvir] Storage manager initial requirements and thoughts
"Richard W.M. Jones" <rjones(a)redhat.com> wrote:
Secondly there is an API of sorts for lvm2. I think Alasdair called
it
"libcmd", but maybe I got that wrong because Google doesn't seem to turn
up anything. In any case, all it is is a wrapper around the command
line tools, so it seems doubtful that this is going to be any better
than just invoking the command line tools ourselves.
lvm2cmd is what you're looking for.
It is only slightly higher-level than "system".
Here's an example of that interface,
from the lvm2 repo, doc/example_cmdlib.c:
#include "lvm2cmd.h"
/* All output gets passed to this function line-by-line */
void test_log_fn(int level, const char *file, int line, 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, 1);
r = lvm2_run(handle, "vgs --noheadings vg1");
/* More commands here */
lvm2_exit(handle);
return r;
}