tracefs_binary_init, tracefs_binary_close, tracefs_binary_write - Open, close and write binary data in

StevenRostedt <rostedt@goodmis.org[1]>
           TzvetomirStoyanov <tz.stoyanov@gmail.com[2]>

       Copyright (C) 2021 VMware, Inc. Free use of this software is granted under the terms of the GNU Public
       License (GPL).

       Set of functions to write binary data in the trace buffer. See Documentation/trace/ftrace.rst from the
       Linux kernel tree for more information about writing data from user space in the trace buffer. All these
       APIs have instance as a first argument. If NULL is passed as instance, the top trace instance is used.

       The tracefs_binary_init() function initializes the library for writing into the trace buffer of the
       selected instance. It is not mandatory to call this API before writing data, the tracefs_binary_write()
       will call it automatically, if the library is not yet initialized. But calling tracefs_binary_init() in
       advance will speed up the writing.

       The tracefs_binary_write() function writes a binary data in the trace buffer of the selected instance.
       The data points to the data with length len, that is going to be written in the trace buffer.

       The tracefs_binary_close() function closes the resources, used by the library for writing in the trace
       buffer of the selected instance.

           #include <tracefs.h>

           if (tracefs_binary_init(NULL) < 0) {
            /* Failed to initialize the library for writing in the trace buffer of the top trace instance */
           }

           unsigned int data = 0xdeadbeef;

                   if (tracefs_binary_write(NULL, &data, sizeof(data)) < 0) {
                           /* Failed to write in the trace buffer */
                   }

           tracefs_binary_close();

tracefs.h
                   Header file to include in order to have access to the library APIs.
           -ltracefs
                   Linker switch to add when building a program that uses the library.

       libtracefs is Free Software licensed under the GNU LGPL 2.1

       tracefs_binary_init, tracefs_binary_close, tracefs_binary_write - Open, close and write binary data in
       the trace buffer.

        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

libtracefs 1.8.1                                   06/05/2025                                      LIBTRACEFS(3)

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

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

       The tracefs_binary_init(), and tracefs_binary_write() functions return 0 if the operation is successful,
       or -1 in case of an error.

libtracefs(3), libtraceevent(3), trace-cmd(1), Documentation/trace/ftrace.rst from the Linux kernel tree

#include<tracefs.h>

       int tracefs_binary_init(struct tracefs_instance *instance);
       int tracefs_binary_write(struct tracefs_instance *instance, void *data, int len);
       void tracefs_binary_close(struct tracefs_instance *instance);