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...implemented by calling guestfs_exists (g, "/") which has the side effect of running the NEED_ROOT macro in the daemon. (There is no simple equivalent of NEED_ROOT on the library side.) --- src/fuse.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/src/fuse.c b/src/fuse.c index dd4f139..c22cbba 100644 --- a/src/fuse.c +++ b/src/fuse.c @@ -1028,6 +1028,12 @@ guestfs__mount_local_run (guestfs_h *g) return -1; } + /* Test if root is mounted. We do this by using a side-effect of + * guestfs_exists (which is that it calls NEED_ROOT). + */ + if (guestfs_exists (g, &quo...

...s, which were then used as base when changing atime/ctime (with e.g. touch), triggering EINVAL by futimens/utimensat when those rubbish values were out of the range allowed for microseconds. --- src/fuse.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/src/fuse.c b/src/fuse.c index 288c02a..dd4f139 100644 --- a/src/fuse.c +++ b/src/fuse.c @@ -175,6 +175,7 @@ mount_local_readdir (const char *path, void *buf, fuse_fill_dir_t filler, if (ss->val[i].ino >= 0) { struct stat statbuf; + memset (&statbuf, 0, sizeof statbuf); statbuf.st_dev = ss->...

..., "/") which has > the side effect of running the NEED_ROOT macro in the daemon. (There > is no simple equivalent of NEED_ROOT on the library side.) > --- > src/fuse.c | 6 ++++++ > 1 file changed, 6 insertions(+) > > diff --git a/src/fuse.c b/src/fuse.c > index dd4f139..c22cbba 100644 > --- a/src/fuse.c > +++ b/src/fuse.c > @@ -1028,6 +1028,12 @@ guestfs__mount_local_run (guestfs_h *g) > return -1; > } > > + /* Test if root is mounted. We do this by using a side-effect of > + * guestfs_exists (which is that it calls NEED_ROOT)...

It seems that FUSE can invoke flush to make sure the pending changes (e.g. to the attributes) of a file are set. Since a missing flush implementation is handled as if it were returning ENOSYS, this can cause issues later. To overcome this, just provide a stub implementation which does nothing, since we have nothing to do and don't want to have FUSE error out. Furthermore, uncomment the