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door_info(3c)
Standard C Library Functions door_info(3C)
NAME
door_info - return information associated with a door descriptor
SYNOPSIS
#include <door.h>
int door_info(int d, struct door_info *info);
DESCRIPTION
The door_info() function returns information associated with a door
descriptor. It obtains information about the door descriptor d and
places the information that is relevant to the door in the structure
pointed to by the info argument.
The door_info structure pointed to by the info argument contains the
following members:
pid_t di_target; /* door server pid */
door_ptr_t di_proc; /* server function */
door_ptr_t di_data; /* data cookie for invocation */
door_attr_t di_attributes; /* door attributes */
door_id_t di_uniquifier; /* unique id among all doors */
The di_target member is the process ID of the door server, or −1 if the
door server process has exited.
The values for di_attributes may be composed of the following:
DOOR_LOCAL The door descriptor refers to a service procedure
in this process.
DOOR_UNREF The door has requested notification when all but
the last reference has gone away.
DOOR_UNREF_MULTI Similar to DOOR_UNREF, except multiple unreferenced
notifications may be delivered for this door.
DOOR_IS_UNREF There is currently only one descriptor referring to
the door.
DOOR_REFUSE_DESC The door refuses any attempt to door_call(3C) it
with argument descriptors.
DOOR_NO_CANCEL Clients who abort a door_call(3C) call on this door
will not cause the cancellation(7) of the server
thread handling the request.
DOOR_REVOKED The door descriptor refers to a door that has been
revoked.
DOOR_PRIVATE The door has a separate pool of server threads
associated with it.
DOOR_ON_TPD The door server is run in the TPD process. For more
information, see the tpd(7) man page.
The di_proc and di_data members are returned as door_ptr_t objects
rather than void * pointers to allow clients and servers to interoper‐
ate in environments where the pointer sizes may vary in size (for exam‐
ple, 32-bit clients and 64-bit servers). Each door has a system-wide
unique number associated with it that is set when the door is created
by door_create(). This number is returned in di_uniquifier.
RETURN VALUES
Upon successful completion, 0 is returned. Otherwise, −1 is returned
and errno is set to indicate the error.
ERRORS
The door_info() function will fail if:
EFAULT The address of argument info is an invalid address.
EBADF d is not a door descriptor.
ATTRIBUTES
See attributes(7) for descriptions of the following attributes:
tab() box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i) ATTRIBUTE TYPEAT‐
TRIBUTE VALUE _ Architectureall _ Availabilitysystem/core-os _ Inter‐
face StabilityCommitted _ MT-LevelSafe
SEE ALSO
door_bind(3C), door_call(3C), door_create(3C), door_server_create(3C),
attributes(7), cancellation(7), tpd(7)
Oracle Solaris 11.4 04 May 2016 door_info(3C)