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Utilities & Libraries
C Library Reference
I
iofunc_client_info_ext()
Return information about a client connection

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        Default handler for _IO_CHOWN messages
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        Return information about a client connection, including abilities
      - iofunc_client_info_ext()
        Return information about a client connection
      - iofunc_client_info_ext_free()
        Free the structure used for information about a client connection
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        Free all locks allocated for the client process
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        Default handler for _IO_PATHCONF messages
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        Default handler for _IO_READ messages
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        Verify a client's read access to a resource
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        Verify the attributes being used to read a link
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        Do permission checks for a _IO_CONNECT_RENAME message
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        Do permission checks for the _IO_SPACE message
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        Populate a stat structure
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        Default handler for _IO_STAT messages
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        Indicate if synchronization is needed
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        Default handler for _IO_SYNC messages
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        Verify permissions to sync
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        Update time stamps
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        Unblock OCBs
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        Default unblock handler
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        Verify that an entry can be unlinked
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        Default handler for the unlock_ocb callout
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        Update time stamps
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        Default handler for _IO_UTIME messages
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        Default handler for _IO_WRITE messages
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        Determine if a number is finite
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        Determine whether one floating-point number is greater than another
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iofunc_client_info_ext()

QNX SDP8.0C Library ReferenceAPIDeveloper

Return information about a client connection

Synopsis:

#include <sys/iofunc.h>

int iofunc_client_info_ext ( resmgr_context_t * ctp,
                             const int ioflag,
                             struct _client_info ** info,
                             int flags );

Arguments:

ctp

A pointer to a resmgr_context_t structure that the resource-manager library uses to pass context information between functions.

ioflag

Zero, or the constant O_REALIDS. This argument is passed in the _IO_OPEN message during an open request. If you specify O_REALIDS, iofunc_client_info_ext() swaps the real and effective values of the user and group IDs before returning. This is a QNX OS extension, to swap real and effective user and group IDs in an atomic operation.

info

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 information about this structure, see ConnectClientInfoExt().

flags

Zero or more of the following:

_NTO_CLIENTINFO_GETGROUPS — get the supplementary group IDs
_NTO_CLIENTINFO_GETTYPEID — results in the type identifier being returned immediately after the last returned supplementary group ID

Library:

libc

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

Description:

The iofunc_client_info_ext() function fetches the info structure for the client. It calls ConnectClientInfoExt() to gather the information, based on the server connection ID found in ctp->info.scoid.

Call iofunc_client_info_ext_free() to free the _client_info structure when you're done with it.

Returns:

EFAULT: A fault occurred when the kernel tried to access the info buffer provided.
EINVAL: The client process is no longer valid.
ENOMEM: The function couldn't allocate the memory for the _client_info structure.
EOK: Successful completion.

Classification:


Safety:
Cancellation point	No
Signal handler	Yes
Thread	Yes

Page updated: August 09, 2024