ConnectClientInfoAble()

Store extended information about a client connection, including abilities

Synopsis:

#include <sys/neutrino.h>

struct _client_able {
    unsigned ability;
    unsigned flags;
    uint64_t range_lo;
    uint64_t range_hi;
};

int ConnectClientInfoAble( int scoid,
                           struct _client_info **info_pp,
                           const int flags,
                           struct _client_able abilities[],
                           const int nable );

Arguments:

scoid
A server connection ID that identifies the client process that you want to get information about. This client is typically a process that's made a connection to the server to try to access a resource. You can get it from the _msg_info argument to MsgReceivev() or MsgInfo().
info_pp
The address of a location where the function can store a pointer to a _client_info structure that the function can fill with information about the client. For more information, see ConnectClientInfoExt(). The ConnectClientInfoAble() function sets the _NTO_CI_UNABLE bit in the flags member if the client doesn't have all the indicated abilities.
flags
Zero or more of the following:
  • _NTO_CLIENTINFO_GETGROUPS — get the supplementary group IDs
abilities
An array of struct _client_able structures that specifies the abilities that the client must have; see below.
nable
The number of entries in the abilities array.

Library:

libc

Use the -l c option to qcc to link against this library. This library is usually included automatically.

Description:

This call gets information about a client connection identified by scoid, allocates a buffer, stores the information in the buffer, and stores a pointer to the buffer in the location that info_pp points to. Use ClientInfoExtFree() to free this buffer.

A server uses this function to determine whether or not a client has the required abilities; see procmgr_ability(), and procmgr_ability_create().

The ConnectClientInfoAble() function is a specialized version of ConnectClientInfo().

_client_able structure

The _client_able structure has at least the following members:

ability
The numeric identifier for the ability; either a PROCMGR_AID_* value (see procmgr_ability()), or an ability that the server created by calling procmgr_ability_create().
flags
The function sets this member to 1 if the client has the specified ability, or 0 if it doesn't.
range_lo
The lower limit on the range of the ability.
range_hi
The upper limit on the range of the ability.

Set the ability, range_lo, and range_hi members before calling ConnectClientInfoAble(); this function sets the flags member.

Returns:

0, or -1 if an error occurred (errno is set).

Errors:

EFAULT
A fault occurred when the kernel tried to access the buffers provided.
EINVAL
The process doesn't have a connection scoid.

Classification:

QNX Neutrino

Safety:  
Cancellation point No
Interrupt handler No
Signal handler Yes
Thread Yes