|
HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
|
|
NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | EXAMPLE | FILES | SEE ALSO | AUTHOR | REPORTING BUGS | LICENSE | RESOURCES | COPYING | NOTES | COLOPHON |
|
|
|
LIBTRACEFS(3) libtracefs Manual LIBTRACEFS(3)
tracefs_option_enable, tracefs_option_disable, tracefs_option_name
- Various trace option functions.
#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);
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.
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.
#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 */
}
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(3), libtraceevent(3), trace-cmd(1)
Steven Rostedt <rostedt@goodmis.org[1]>
Tzvetomir Stoyanov <tz.stoyanov@gmail.com[2]>
Report bugs to <linux-trace-devel@vger.kernel.org[3]>
libtracefs is Free Software licensed under the GNU LGPL 2.1
https://git.kernel.org/pub/scm/libs/libtrace/libtracefs.git/
Copyright (C) 2020 VMware, Inc. Free use of this software is
granted under the terms of the GNU Public License (GPL).
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
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
2025-08-11. (At that time, the date of the most recent commit
that was found in the repository was 2025-06-02.) 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)
Pages that refer to this page: tracefs_filter_pid_function(3)
|
HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
|