Man page - ts_error_fn(3)

Packages contains this manual

Package: libts0t64
apt-get install libts0t64

Manuals in package:

ts_close_restricted(3)
ts_libversion(3)
ts_test_mt(1)
ts_read_raw_mt(3)
ts_finddev(1)
ts_uinput(1)
ts_setup(3)
ts_test(1)
ts_fd(3)
ts_error_fn(3)
ts_print(1)
ts_harvest(1)
ts_conf_set(3)
ts_get_eventpath(3)
ts_config(3)
ts_verify(1)
ts_open(3)
ts_open_restricted(3)
ts_read_raw(3)
ts_conf_get(3)
ts_read(3)
ts_conf(1)
ts_close(3)
ts_print_raw(1)
ts_calibrate(1)
ts_print_mt(1)
ts.conf(5)
ts_read_mt(3)

Documentations in package:

libts0t64

Manual

TS_ERROR_FN

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
SEE ALSO

NAME

ts_error_fn - use a custom error function for libts library errors

SYNOPSIS

#include <tslib.h>

int (*ts_error_fn)(const char *fmt, va_list ap);

DESCRIPTION

ts_error_fn () is by default implemented similar like this:

static int errfn(const char *fmt, va_list ap)
{
return vfprintf(stderr, fmt, ap);
}

inside the library. It is exposed to the user and can be replaced by a custom error function. Simply assign your custom implementation to ts_error_fn like

ts_error_fn = my_custom_errfn;

It can be used to write the system log files, for example. The ts_print_mt test program has an example.

RETURN VALUE

user defined.