ConnectFlags(), ConnectFlags_r()

Modify the flags associated with a connection

Synopsis:

#include <sys/neutrino.h>

int ConnectFlags( pid_t pid,
                  int coid, 
                  unsigned mask, 
                  unsigned bits );

int ConnectFlags_r( pid_t pid,
                    int coid, 
                    unsigned mask, 
                    unsigned bits );

Since:

BlackBerry 10.0.0

Arguments:

pid
The ID of the process that the connection ID belongs to, or 0 for the current process.
coid
The ID of the connection whose flags you want to modify.
mask
A bitmap that indicates which bits are to be modified in the flags. The bits currently defined include:
  • _NTO_COF_CLOEXEC — close the connection if the process calls an exec*() function to start a new process.
  • _NTO_COF_INSECURE — the kernel sets this flag on a connection if the client program replaces its process image (e.g., by calling exec*()) with a setuid or setgid binary. Until the process that owns the channel clears this flag, calls to MsgDeliverEvent() fail with an error of EACCES.
bits
The new value of the flags.

Library:

libc

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

Description:

The ConnectFlags() and ConnectFlags_r() kernel calls modify flags associated with the specified connection. These kernel calls don't block.

These functions are identical except in the way they indicate errors. See the Returns section for details.

You need to initialize the bits that correspond to the flag in both the mask and bits arguments:

  • If the bit in the mask is 1, and the bit in the bits is 1, the function turns the flag on.
  • If the bit in the mask is 1, and the bit in the bits is 0, the function turns the flag off.
  • If the bit in the mask is 0, the function doesn't change the current value of the flag.

  • In order to change the connection flags on a coid for another process with a different user ID, your process must have the PROCMGR_AID_CONNECTION ability enabled.
  • In order to request information about another process, your process must have the PROCMGR_AID_XPROCESS_QUERY ability enabled.

For more information, see procmgr_ability().

Returns:

The only difference between these functions is the way they indicate errors:

ConnectFlags()
The previous value of the flags associated with the connection. If an error occurs, the function returns -1 and sets errno .
ConnectFlags_r()
The previous value of the flags associated with the connection. This function does NOT set errno. If an error occurs, the negative of a value from the Errors section is returned.

Errors:

EBADF
The coid isn't a valid connection ID for the process.
EINVAL
The mask includes invalid bits.
EPERM
The calling process doesn't have the required permission; see procmgr_ability().
ESRCH
The process ID is invalid.

Classification:

QNX Neutrino

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

Last modified: 2014-06-24



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