trace/stderr.c


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#include "trace.h"
#include "trace/control.h"


void trace_print_events(FILE *stream, fprintf_function stream_printf)
{
    unsigned int i;

    for (i = 0; i < NR_TRACE_EVENTS; i++) {
        stream_printf(stream, "%s [Event ID %u] : state %u\n",
                      trace_list[i].tp_name, i, trace_list[i].state);
    }
}

bool trace_event_set_state(const char *name, bool state)
{
    unsigned int i;
    unsigned int len;
    bool wildcard = false;
    bool matched = false;

    len = strlen(name);
    if (len > 0 && name[len - 1] == '*') {
        wildcard = true;
        len -= 1;
    }
    for (i = 0; i < NR_TRACE_EVENTS; i++) {
        if (wildcard) {
            if (!strncmp(trace_list[i].tp_name, name, len)) {
                trace_list[i].state = state;
                matched = true;
            }
            continue;
        }
        if (!strcmp(trace_list[i].tp_name, name)) {
            trace_list[i].state = state;
            return true;
        }
    }
    return matched;
}

bool trace_backend_init(const char *events, const char *file)
{
    if (file) {
        fprintf(stderr, "error: -trace file=...: "
                "option not supported by the selected tracing backend\n");
        return false;
    }
    trace_backend_init_events(events);
    return true;
}