GETPEEREID(2) BSD Programmer's Manual GETPEEREID(2)NAMEgetpeereid - get effective user and group identification of locally-
connected peer
SYNOPSIS
#include <sys/types.h>
#include <sys/socket.h>
int
getpeereid(int s, uid_t *euid, gid_t *egid);
DESCRIPTIONgetpeereid() returns the effective user ID and group ID of the peer con-
nected to a UNIX domain socket (see unix(4)). The argument s must be of
type SOCK_STREAM.
One common use is for UNIX domain servers to determine the credentials of
clients that have connected to it.
getpeereid() takes three parameters:
+ s contains the file descriptor of the socket whose peer credentials
should be looked up.
+ euid points to a uid_t variable into which the effective user ID for
the connected peer will be stored.
+ egid points to a gid_t variable into which the effective group ID for
the connected peer will be stored.
RETURN VALUES
If the call succeeds, a 0 is returned and euid and egid are set to the
effective user ID and group ID of the connected peer. Otherwise, errno is
set and a value of -1 is returned.
ERRORS
On failure, errno is set to one of the following:
[EBADF] The argument s is not a valid descriptor.
[ENOTSOCK] The argument s is a file, not a socket.
[EOPNOTSUPP] The socket is not in the UNIX domain.
[ENOTCONN] The socket is not connected.
[ENOBUFS] Insufficient resources were available in the system to per-
form the operation.
[EFAULT] The euid or egid parameters point to memory not in a valid
part of the process address space.
SEE ALSOaccept(2), bind(2), getpeername(2), getsockname(2), socket(2), unix(4)HISTORY
The getpeereid() function call appeared in OpenBSD 3.0.
MirOS BSD #10-current June 26, 2001 1
