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90 lines
2.4 KiB
90 lines
2.4 KiB
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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#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* <[email protected]>, author of *libtraceevent*. |
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*Tzvetomir Stoyanov* <[email protected]>, 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 <[email protected]> |
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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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