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LIBTRACEEVENT(3) libtraceevent Manual LIBTRACEEVENT(3)
tep_parse_header_page - Parses the data stored in the header page.
#include <event-parse.h> int tep_parse_header_page(struct tep_handle *tep, char *buf, unsigned long size, int long_size);
The tep_parse_header_page() function parses the header page data from buf, and initializes the tep, trace event parser context, with it. The buffer buf is with size, and is supposed to be copied from tracefs/events/header_page. Some old kernels do not have header page info, in this case the tep_parse_header_page() function can be called with size equal to 0. The tep context is initialized with default values. The long_size can be used in this use case, to set the size of a long integer to be used.
The tep_parse_header_page() function returns 0 in case of success, or -1 in case of an error.
#include <event-parse.h> ... struct tep_handle *tep = tep_alloc(); ... char *buf; int size; buf = read_file("/sys/kernel/tracing/events/header_page", &size); if (tep_parse_header_page(tep, buf, size, sizeof(unsigned long)) != 0) { /* Failed to parse the header page */ } ...
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 <[email protected][1]>, author of libtraceevent. Tzvetomir Stoyanov <[email protected][2]>, author of this man page.
Report bugs to <[email protected][3]>
libtraceevent is Free Software licensed under the GNU LGPL 2.1
https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/
1. [email protected] mailto:[email protected] 2. [email protected] mailto:[email protected] 3. [email protected] mailto:[email protected]
This page is part of the libtraceevent (Linux kernel trace event
library) project. Information about the project can be found at
⟨https://www.trace-cmd.org/⟩. If you have a bug report for this
manual page, see ⟨https://www.trace-cmd.org/⟩. This page was
obtained from the project's upstream Git repository
⟨https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git⟩
on 2024-06-14. (At that time, the date of the most recent commit
that was found in the repository was 2024-05-17.) If you
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libtraceevent 1.7.3 09/24/2023 LIBTRACEEVENT(3)