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.TH CPG_FD_GET 3 2004-08-31 "corosync Man Page" "Corosync Cluster Engine Programmer's Manual"
.SH NAME
cpg_fd_get \- Dispatches callbacks from the CPG service
.SH SYNOPSIS
.B #include <corosync/cpg.h>
.sp
.BI "int cpg_fd_get(cpg_handle_t " handle ", int *" fd ");
.SH DESCRIPTION
The
.B cpg_fd_get
function is used to retrieve the file descriptor that may be used with the poll
system call to determine when
.B cpg_dispatch(3)
won't block.  The
.I handle
argument may not be used directly with
.B poll
because it is not the file descriptor, but instead an internal identifier used
by the CPG library.
.SH RETURN VALUE
This call returns the CS_OK value if successful, otherwise an error is returned.
.PP
.SH ERRORS
The errors are undocumented.
.SH "SEE ALSO"
.BR cpg_overview (3),
.BR cpg_initialize (3),
.BR cpg_finalize (3),
.BR cpg_fd_get (3),
.BR cpg_dispatch (3),
.BR cpg_join (3),
.BR cpg_leave (3),
.BR cpg_mcast_joined (3),
.BR cpg_membership_get (3)
.BR cpg_zcb_alloc (3)
.BR cpg_zcb_free (3)
.BR cpg_zcb_mcast_joined (3)
.BR cpg_context_get (3)
.BR cpg_context_set (3)
.BR cpg_local_get (3)

.PP
.PP

.B CS_ERR_TRY_AGAIN
Resource temporarily unavailable

.B CS_ERR_INVALID_PARAM
Invalid argument

.B CS_ERR_ACCESS
Permission denied

.B CS_ERR_LIBRARY
The connection failed

.B CS_ERR_INTERRUPT
System call interrupted by a signal

.B CS_ERR_NOT_SUPPORTED
The requested protocol/functionality not supported

.B CS_ERR_MESSAGE_ERROR
Incorrect auth message received

.B CS_ERR_NO_MEMORY
Not enough memory to complete the requested task