tep_parse_header_page - Parses the data stored in the header page.

StevenRostedt <rostedt@goodmis.org[1]>, author of libtraceevent.
           TzvetomirStoyanov <tz.stoyanov@gmail.com[2]>, author of this man page.

       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.

           #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 is Free Software licensed under the GNU LGPL 2.1

       tep_parse_header_page - Parses the data stored in the header page.

        1. rostedt@goodmis.orgmailto:rostedt@goodmis.org

        2. tz.stoyanov@gmail.commailto:tz.stoyanov@gmail.com

        3. linux-trace-devel@vger.kernel.orgmailto:linux-trace-devel@vger.kernel.org

libtraceevent 1.8.4                                12/24/2024                                   LIBTRACEEVENT(3)

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

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

       The tep_parse_header_page() function returns 0 in case of success, or -1 in case of an error.

libtraceevent(3), trace-cmd(1)

#include<event-parse.h>

       int tep_parse_header_page(struct tep_handle *tep, char *buf, unsigned long size, int long_size);