| libtracefs(3) |
| ============= |
| |
| NAME |
| ---- |
| tracefs_cpu_open, tracefs_cpu_close - Opening trace_pipe_raw data for reading |
| |
| SYNOPSIS |
| -------- |
| [verse] |
| -- |
| *#include <tracefs.h>* |
| |
| struct tracefs_cpu pass:[*]*tracefs_cpu_open*(struct tracefs_instance pass:[*]_instance_, |
| int _cpu_, bool _nonblock_); |
| void *tracefs_cpu_close*(struct tracefs_cpu pass:[*]_tcpu_); |
| -- |
| |
| DESCRIPTION |
| ----------- |
| This set of APIs can be used to open the raw data from the trace_pipe_raw |
| files in the tracefs file system in oder to read them with the *tracefs_cpu_read*(3) |
| functions. |
| |
| The *tracefs_cpu_open()* creates a descriptor that can read the tracefs |
| trace_pipe_raw file for a given _cpu_ in a given _instance_. If _instance_ is |
| NULL than the toplevel trace_pipe_raw file is used. |
| |
| The *tracefs_cpu_close()* closes all the file descriptors associated to the trace_pipe_raw |
| opened by *tracefs_cpu_open()*. |
| |
| RETURN VALUE |
| ------------ |
| The *tracefs_cpu_open()* returns a struct tracefs_cpu descriptor that can be |
| used by the other functions or NULL on error. |
| |
| EXAMPLE |
| ------- |
| See *tracefs_cpu_read*(3) for an example. |
| |
| FILES |
| ----- |
| [verse] |
| -- |
| *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. |
| -- |
| |
| SEE ALSO |
| -------- |
| *libtracefs*(3), |
| *libtraceevent*(3), |
| *trace-cmd*(1) |
| |
| AUTHOR |
| ------ |
| [verse] |
| -- |
| *Steven Rostedt* <rostedt@goodmis.org> |
| -- |
| REPORTING BUGS |
| -------------- |
| Report bugs to <linux-trace-devel@vger.kernel.org> |
| |
| LICENSE |
| ------- |
| libtracefs is Free Software licensed under the GNU LGPL 2.1 |
| |
| RESOURCES |
| --------- |
| https://git.kernel.org/pub/scm/libs/libtrace/libtracefs.git/ |
| |
| COPYING |
| ------- |
| Copyright \(C) 2022 Google, Inc. Free use of this software is granted under |
| the terms of the GNU Public License (GPL). |
