tep_find_event - Man Page

#include <event-parse​.h>

struct tep_event *tep_find_event(struct tep_handle *tep, int id);
struct tep_event *tep_find_event_by_name(struct tep_handle *tep, const char *sys, const char *name);
struct tep_event *tep_find_event_by_record(struct tep_handle *tep, struct tep_record *record);
bool tep_record_is_event(struct tep_record *record, struct tep_event *event);

This set of functions can be used to search for an event, based on a given criteria​. All functions require a pointer to a tep, trace event parser context​.

The tep_find_event() function searches for an event by given event id​. The event ID is assigned dynamically and can be viewed in event’s format file, "ID" field​.

The tep_find_event_by_name() function searches for an event by given event name, under the system sys​. If the sys is NULL (not specified), the first event with name is returned​.

The tep_find_event_by_record() function searches for an event from a given record​.

The tep_record_is_event() function tests if the given record is of the type of the event​. This is normally used to know if the record being processed is of an event where further processing should be done​.

All these functions except tep_record_is_event() return a pointer to the found event, or NULL if there is no such event​.

#include <event-parse​.h>
​.​.​.
struct tep_handle *tep = tep_alloc();
​.​.​.
struct tep_event *event;

event = tep_find_event(tep, 1857);
if (event == NULL) {
        /* There is no event with ID 1857 */
}

event = tep_find_event_by_name(tep, "kvm", "kvm_exit");
if (event == NULL) {
        /* There is no kvm_exit event, from kvm system */
}

void event_from_record(struct tep_record *record)
{
 struct tep_event *event = tep_find_event_by_record(tep, record);
        if (event == NULL) {
                /* There is no event from given record */
        }
}
​.​.​.

event-parse​.h
        Header file to include in order to have access to the library APIs​.
-ltraceevent
        Linker switch to add when building a program that uses the library​.

libtraceevent(3), trace-cmd(1)

Steven Rostedt <rostedt@goodmis​.org​[1]>, author of libtraceevent​.
Tzvetomir Stoyanov <tz​.stoyanov@gmail​.com​[2]>, author of this man page​.

Report bugs to <linux-trace-devel@vger​.kernel​.org​^[3]>

libtraceevent is Free Software licensed under the GNU LGPL 2​.1

https://git​.kernel​.org/pub/scm/libs/libtrace/libtraceevent​.git/

1. rostedt@goodmis.org
   mailto:rostedt@goodmis.org
2. tz.stoyanov@gmail.com
   mailto:tz.stoyanov@gmail.com
3. linux-trace-devel@vger.kernel.org
   mailto:linux-trace-devel@vger.kernel.org