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int Ns_TclGetOpenFd (
Tcl_Interp* ,
char* chanId,
int write,
int* fdPtr
);
This function returns an open Unix file descriptor for the specified channel. The value at fdPtr is updated with a valid Unix file descriptor.
The write parameter specifies if a writable (TRUE) or readable (FALSE) channel is being requested. See the Tcl 7.6 documentation for Tcl_GetChannelFile.
This function returns TCL_ERROR or TCL_OK.