DOKK / manpages / debian 11 / libts0 / ts_error_fn.3.en
TS_ERROR_FN(3) tslib TS_ERROR_FN(3)

ts_error_fn - use a custom error function for libts library errors

#include <tslib.h>

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

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.

user defined.

ts_read(3), ts_open(3), ts_setup(3), ts_close(3), ts.conf(5)