door_info(3DOOR) Door Library Functions door_info(3DOOR)NAMEdoor_info - return information associated with a door descriptor
SYNOPSIS
cc [ flag ... ] file ... -ldoor [ library ... ]
#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 proce‐
dure 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 unrefer‐
enced notifications may be delivered for this
door.
DOOR_IS_UNREF There is currently only one descriptor refer‐
ring to the door.
DOOR_REFUSE_DESC The door refuses any attempt to
door_call(3DOOR) it with argument descriptors.
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been revoked.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.
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(5) for descriptions of the following attributes:
┌─────────────────────────────┬─────────────────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├─────────────────────────────┼─────────────────────────────┤
│Architecture │all │
├─────────────────────────────┼─────────────────────────────┤
│Availability │SUNWcsu │
├─────────────────────────────┼─────────────────────────────┤
│Interface Stability │Evolving │
├─────────────────────────────┼─────────────────────────────┤
│MT-Level │Safe │
└─────────────────────────────┴─────────────────────────────┘
SEE ALSOdoor_bind(3DOOR), door_call(3DOOR), door_create(3DOOR),
door_server_create(3DOOR), libdoor(3LIB), attributes(5)SunOS 5.10 14 Feb 2003 door_info(3DOOR)
