James Morrison <[EMAIL PROTECTED]> writes:
> Off the current topic I've been looking at the symlink server
> recently and there are two mach_port_t 's that I noticed. One is
> realnode and the other is realnodenoauth. What is the difference
> between these port_t's.
realnode comes from the fsys_startup() call:
error =
fsys_startup (bootstrap, 0, control, MACH_MSG_TYPE_COPY_SEND, &realnode);
[0]
realnodenoauth is like realnode, but without any associated [UG]IDs:
io_restrict_auth (realnode, &realnodenoauth, 0, 0, 0, 0);
[1]
realnode isn't used any more:
mach_port_deallocate (mach_task_self (), realnode);
realnodenoauth gets returned to O_NOLINK lookups:
if (flags & O_NOLINK)
{
/* Return our underlying node. */
*ret = realnodenoauth;
[0] hurd/fsys.defs:
/* Sent by filesystem on its bootstrap port upon startup.
REALNODE is the node this filesystem is the translator for,
opened with flags FLAGS (O_NOTRANS is assumed even if not
provided). */
routine fsys_startup (
bootstrap: mach_port_t;
RPT
openflags: int;
control_port: mach_port_send_t;
out realnode: mach_port_send_t);
[1] hurd/io.defs:
/* Return another port which has been restricted to do only those
things which both the current user and the newly specified user can
do. */
routine io_restrict_auth (
io_object: io_t;
RPT
out new_object: mach_port_send_t;
uids: idarray_t SCP;
gids: idarray_t SCP);
hth,
moritz
--
Moritz Schulte <[EMAIL PROTECTED]> http://www.chaosdorf.de/moritz/
Debian/GNU supporter - http://www.debian.org/ http://www.gnu.org/
GPG fingerprint = 3A14 3923 15BE FD57 FC06 B501 0841 2D7B 6F98 4199
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