On 09/07/10 - 04:08:13PM, Lai Jiangshan wrote:
Hi, Chris,
I saw virDomainQemuMonitorCommand() in libvirt-qemu.c, I think it will help me to send arbitrary qemu-monitor command to qemu via libvirtd.
But how can I use virDomainQemuMonitorCommand()? Can I use it by just using current tools(virsh or other) without writing any code?
Unfortunately, no. There is a bug in the current virsh command that prevents it from properly parsing the command-lines necessary to send monitor commands to the qemu monitor. Until we fix that bug, we won't push the support into virsh. For that reason you will need to write a custom program to call virDomainQemuMonitorCommand as appropriate. The absolute easiest program you can write looks something like (untested): #include <stdio.h> #include <stdlib.h> #include <libvirt/libvirt.h> int main() { virConnectPtr conn; virDomainPtr dom; char *reply; conn = virConnectOpen(NULL); dom = virDomainLookupByName(conn, "mydomain"); virDomainQemuMonitorCommand(dom, "info cpus", &reply, 0); fprintf(stderr, "Reply: %s\n", reply); free(reply); virConnectClose(conn); return 0; } -- Chris Lalancette