Re: [Libguestfs] [PATCH] daemon: Run lsof when an umount command fails in umount_all call.

Useful for debugging unmount failures. Note that we include lsof in the appliance already. --- daemon/mount.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/daemon/mount.c b/daemon/mount.c index c5b7d89..e139482 100644 --- a/daemon/mount.c +++ b/daemon/mount.c @@ -424,6 +424,10 @@ do_umount_all (void) r = command (NULL, &err, str_umount, mounts.argv[i], NULL); if (r == -1) { reply_with_error ("umount: %s: %s", mounts.argv[i], err); + if (verbose) { + /* Try running lsof to see what is holding the mountpoint open. */ + command (NULL, NULL, "lsof", mounts.argv[i], NULL); + } free_stringslen (mounts.argv, mounts.size); return -1; }