diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/guestfs.pod | 8 | ||||
| -rw-r--r-- | src/proto.c | 2 |
2 files changed, 10 insertions, 0 deletions
diff --git a/src/guestfs.pod b/src/guestfs.pod index 677d9449..7cb05a6c 100644 --- a/src/guestfs.pod +++ b/src/guestfs.pod @@ -1855,6 +1855,14 @@ The header contains the procedure number (C<guestfs_proc>) which is how the receiver knows what type of args structure to expect, or none at all. +For functions that take optional arguments, the optional arguments are +encoded in the C<guestfs_I<foo>_args> structure in the same way as +ordinary arguments. A bitmask in the header indicates which optional +arguments are meaningful. The bitmask is also checked to see if it +contains bits set which the daemon does not know about (eg. if more +optional arguments were added in a later version of the library), and +this causes the call to be rejected. + The reply message for ordinary functions is: total length (header + ret, diff --git a/src/proto.c b/src/proto.c index 5d924e86..5c22e3d6 100644 --- a/src/proto.c +++ b/src/proto.c @@ -658,6 +658,8 @@ guestfs___send (guestfs_h *g, int proc_nr, xdrproc_t xdrp, char *args) hdr.direction = GUESTFS_DIRECTION_CALL; hdr.serial = serial; hdr.status = GUESTFS_STATUS_OK; + hdr.progress_hint = 0; + hdr.optargs_bitmask = 0; if (!xdr_guestfs_message_header (&xdr, &hdr)) { error (g, _("xdr_guestfs_message_header failed")); |