Eliminate this race: http://git.et.redhat.com/?p=libguestfs.git;a=blob;f=src/guestfs.c;h=fb214c535de1a63b2042d22912d6cf2b53664d3d;hb=HEAD#l956 by using "server" on the Unix socket. See qemu function qemu_chr_open_tcp [sic] for details.
Note the "nowait" flag too Moving upstream
This is long fixed.