trace/stderr.c

   1 #include "trace.h"
   2 #include "trace/control.h"
   3
   4
   5 void trace_print_events(FILE *stream, fprintf_function stream_printf)
   6 {
   7     unsigned int i;
   8
   9     for (i = 0; i < NR_TRACE_EVENTS; i++) {
  10         stream_printf(stream, "%s [Event ID %u] : state %u\n",
  11                       trace_list[i].tp_name, i, trace_list[i].state);
  12     }
  13 }
  14
  15 bool trace_event_set_state(const char *name, bool state)
  16 {
  17     unsigned int i;
  18     unsigned int len;
  19     bool wildcard = false;
  20     bool matched = false;
  21
  22     len = strlen(name);
  23     if (len > 0 && name[len - 1] == '*') {
  24         wildcard = true;
  25         len -= 1;
  26     }
  27     for (i = 0; i < NR_TRACE_EVENTS; i++) {
  28         if (wildcard) {
  29             if (!strncmp(trace_list[i].tp_name, name, len)) {
  30                 trace_list[i].state = state;
  31                 matched = true;
  32             }
  33             continue;
  34         }
  35         if (!strcmp(trace_list[i].tp_name, name)) {
  36             trace_list[i].state = state;
  37             return true;
  38         }
  39     }
  40     return matched;
  41 }
  42
  43 bool trace_backend_init(const char *events, const char *file)
  44 {
  45     if (file) {
  46         fprintf(stderr, "error: -trace file=...: "
  47                 "option not supported by the selected tracing backend\n");
  48         return false;
  49     }
  50     trace_backend_init_events(events);
  51     return true;
  52 }