SYNOPSIS

#include <event-parse.h>

enum tep_errno tep_parse_event(struct tep_handle *tep, const char *buf, unsigned long size, const char *sys);
enum tep_errno tep_parse_format(struct tep_handle *tep, struct tep_event **eventp, const char *buf, unsigned long size, const char *sys);

DESCRIPTION

The tep_parse_event() function parses the event format and creates an event structure to quickly parse raw data for a given event. The tep argument is the trace event parser context. The created event structure is stored in the tep context. The buf argument is a buffer with size, where the event format data is. The event format data can be taken from tracefs/events/…/…/format files. The sys argument is the system of the event.

The tep_parse_format() function does the same as tep_parse_event(). The only difference is in the extra eventp argument, where the newly created event structure is returned.

RETURN VALUE

Both tep_parse_event() and tep_parse_format() functions return 0 on success, or TEP_ERRNO__… in case of an error.

EXAMPLE

b'\n
#include <event-parse.h>\n...\nstruct tep_handle *tep = tep_alloc();\n...\nchar *buf;\nint size;\nstruct tep_event *event = NULL;\nbuf = read_file("/sys/kernel/tracing/events/ftrace/print/format", &size);\nif (tep_parse_event(tep, buf, size, "ftrace") != 0) {\n        /* Failed to parse the ftrace print format */\n}\n\nif (tep_parse_format(tep, &event, buf, size, "ftrace") != 0) {\n        /* Failed to parse the ftrace print format */\n}\n...
\n'

FILES

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.

SEE ALSO

libtraceevent(3), trace-cmd(1)

AUTHOR

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

REPORTING BUGS

LICENSE

libtraceevent is Free Software licensed under the GNU LGPL 2.1

RESOURCES