tracefs_option_enable(3) — Справочная страница Linux

LIBTRACEFS(3)               libtracefs Manual              LIBTRACEFS(3)

ИМЯ

       tracefs_option_enable, tracefs_option_disable,
       tracefs_option_name - Various trace option functions.

СИНТАКСИС

       #include <tracefs.h>

       int tracefs_option_enable(struct tracefs_instance *instance, enum tracefs_option_id id);
       int tracefs_option_disable(struct tracefs_instance *instance, enum tracefs_option_id id);
       const char *tracefs_option_name(enum tracefs_option_id id);

ОПИСАНИЕ

       This set of APIs can be used to enable and disable ftrace options
       and to get the name of an option.

       The tracefs_option_enable() function enables the option with id
       in the given instance. If instance is NULL, the option is enabled
       in the top trace instance.

       The tracefs_option_disable() function disables the option with id
       in the given instance. If instance is NULL, the option is
       disabled in the top trace instance.

       The tracefs_option_name() function returns a string, representing
       the option with id. The string must not be freed.

ЗНАЧЕНИЕ, ВОЗВРАЩАЕМОЕ ФУНКЦИЕЙ

       The tracefs_option_enable() and tracefs_option_disable()
       functions return 0 if the state of the option is set
       successfully, or -1 in case of an error.

       The tracefs_option_name() function returns string with option
       name, or "unknown" in case of an error. The returned string must
       not be freed.

ПРИМЕР

           #include <tracefs.h>
           ...
           if (tracefs_option_enable(NULL, TRACEFS_OPTION_ANNOTATE)) {
                   /* Failed to enable annotate option in top trace instance */
           }
           ...
           if (tracefs_option_disable(NULL, TRACEFS_OPTION_CONTEXT_INFO)) {
                   /* Failed to disable context info option in top trace instance */
           }
           ...
           char *name = tracefs_option_name(TRACEFS_OPTION_FUNC_STACKTRACE);
           if (strcmp(name, "unknown")) {
                   /* Cannot get the name of the option */
           }

ФАЙЛЫ

           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.

СМОТРИТЕ ТАКЖЕ

       libtracefs(3), libtraceevent(3), trace-cmd(1)

АВТОР

           Steven Rostedt <rostedt@goodmis.org[1]>
           Tzvetomir Stoyanov <tz.stoyanov@gmail.com[2]>

СООБЩЕНИЕ ОБ ОШИБКАХ

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

ЛИЦЕНЗИЯ

       libtracefs is Free Software licensed under the GNU LGPL 2.1

РЕСУРСЫ

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

КОПИРОВАНИЕ

       Copyright (C) 2020 VMware, Inc. Free use of this software is
       granted under the terms of the GNU Public License (GPL).

ПРИМЕЧАНИЯ

        1. rostedt@goodmis.org
           mailto:rostedt@goodmis.org

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

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

КОЛОФОН

       This page is part of the libtracefs (Linux kernel trace file
       system 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/libtracefs.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
       discover any rendering problems in this HTML version of the page,
       or you believe there is a better or more up-to-date source for
       the page, or you have corrections or improvements to the
       information in this COLOPHON (which is not part of the original
       manual page), send a mail to man-pages@man7.org

libtracefs 1.7.0               12/22/2023                  LIBTRACEFS(3)