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=head1 NAME
nbd_set_debug - set or clear the debug flag
=head1 SYNOPSIS
#include <libnbd.h>
int nbd_set_debug (
struct nbd_handle *h, bool debug
);
=head1 DESCRIPTION
Set or clear the debug flag. When debugging is enabled,
debugging messages from the library are printed to stderr,
unless a debugging callback has been defined too
(see L<nbd_set_debug_callback(3)>) in which case they are
sent to that function. This flag defaults to false on
newly created handles, except if C<LIBNBD_DEBUG=1> is
set in the environment in which case it defaults to true.
=head1 RETURN VALUE
If the call is successful the function returns C<0>.
=head1 ERRORS
On error C<-1> is returned.
Refer to L<libnbd(3)/ERROR HANDLING>
for how to get further details of the error.
The following parameters must not be NULL: C<h>.
For more information see L<libnbd(3)/Non-NULL parameters>.
=head1 VERSION
This function first appeared in libnbd 1.0.
If you need to test if this function is available at compile time
check if the following macro is defined:
#define LIBNBD_HAVE_NBD_SET_DEBUG 1
=head1 SEE ALSO
L<nbd_create(3)>,
L<nbd_set_debug_callback(3)>,
L<nbd_set_handle_name(3)>,
L<libnbd(3)>.
=head1 AUTHORS
Eric Blake
Richard W.M. Jones
=head1 COPYRIGHT
Copyright Red Hat
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