DOOR_UCRED(3C) Standard C Library Functions DOOR_UCRED(3C)

NAME

door_ucred - return credential information associated with the client

SYNOPSIS

cc -mt [ flag... ] file... [ library... ]
#include <door.h>

int door_ucred(ucred_t **info);

DESCRIPTION

The door_ucred() function returns credential information associated with
the client, if any, of the current door invocation.


When successful, door_ucred() writes a pointer to a user credential to
the location pointed to by info if that location was previously NULL. If
that location was non-null, door_ucred() assumes that info points to a
previously allocated ucred_t which is then reused. The location pointed
to by info can be used multiple times before being freed. The value
returned in info must be freed using ucred_free(3C).


The resulting user credential includes information about the effective
user and group ID, the real user and group ID, all privilege sets and the
calling PID.


The credential information associated with the client refers to the
information from the immediate caller, not necessarily from the first
thread in a chain of door calls.

RETURN VALUES

Upon successful completion, door_ucred() returns 0. Otherwise, -1 is
returned and errno is set to indicate the error, in which case the memory
location pointed to by the info argument is unchanged.

ERRORS

The door_ucred() function will fail if:

EAGAIN
The location pointed to by info was NULL and allocating memory
sufficient to hold a ucred failed.


EFAULT
The address of the info argument is invalid.


EINVAL
There is no associated door client.


ENOMEM
The location pointed to by info was NULL and allocating memory
sufficient to hold a ucred failed.

ATTRIBUTES

See attributes(7) for descriptions of the following attributes:


+--------------------+-----------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-----------------+
|Interface Stability | Stable |
+--------------------+-----------------+
|MT-Level | Safe |
+--------------------+-----------------+

SEE ALSO

door_call(3C), door_create(3C), ucred_get(3C), attributes(7)

March 22, 2005 DOOR_UCRED(3C)