91 lines
2.4 KiB
Plaintext
91 lines
2.4 KiB
Plaintext
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libtraceevent(3)
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================
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NAME
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----
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tep_parse_event, tep_parse_format - Parse the event format information
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SYNOPSIS
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--------
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[verse]
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--
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*#include <event-parse.h>*
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enum tep_errno *tep_parse_event*(struct tep_handle pass:[*]_tep_, const char pass:[*]_buf_, unsigned long _size_, const char pass:[*]_sys_);
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enum tep_errno *tep_parse_format*(struct tep_handle pass:[*]_tep_, struct tep_event pass:[*]pass:[*]_eventp_, const char pass:[*]_buf_, unsigned long _size_, const char pass:[*]_sys_);
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--
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DESCRIPTION
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-----------
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The _tep_parse_event()_ function parses the event format and creates an event
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structure to quickly parse raw data for a given event. The _tep_ argument is
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the trace event parser context. The created event structure is stored in the
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_tep_ context. The _buf_ argument is a buffer with _size_, where the event
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format data is. The event format data can be taken from
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tracefs/events/.../.../format files. The _sys_ argument is the system of
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the event.
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The _tep_parse_format()_ function does the same as _tep_parse_event()_. The only
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difference is in the extra _eventp_ argument, where the newly created event
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structure is returned.
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RETURN VALUE
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------------
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Both _tep_parse_event()_ and _tep_parse_format()_ functions return 0 on success,
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or TEP_ERRNO__... in case of an error.
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EXAMPLE
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-------
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[source,c]
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--
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#include <event-parse.h>
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...
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struct tep_handle *tep = tep_alloc();
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...
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char *buf;
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int size;
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struct tep_event *event = NULL;
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buf = read_file("/sys/kernel/tracing/events/ftrace/print/format", &size);
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if (tep_parse_event(tep, buf, size, "ftrace") != 0) {
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/* Failed to parse the ftrace print format */
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}
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if (tep_parse_format(tep, &event, buf, size, "ftrace") != 0) {
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/* Failed to parse the ftrace print format */
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}
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...
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--
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FILES
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-----
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[verse]
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--
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*event-parse.h*
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Header file to include in order to have access to the library APIs.
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*-ltraceevent*
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Linker switch to add when building a program that uses the library.
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--
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SEE ALSO
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--------
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_libtraceevent(3)_, _trace-cmd(1)_
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AUTHOR
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------
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[verse]
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--
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*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
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*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
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--
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REPORTING BUGS
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--------------
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Report bugs to <linux-trace-devel@vger.kernel.org>
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LICENSE
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-------
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libtraceevent is Free Software licensed under the GNU LGPL 2.1
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RESOURCES
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---------
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https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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