babeltrace2(1) — Linux manual page

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | COMMANDS | PROJECT’S PLUGINS | EXAMPLES | ENVIRONMENT VARIABLES | FILES | EXIT STATUS | BUGS | RESOURCES | AUTHORS | COPYRIGHT | SEE ALSO | COLOPHON

BABELTRACE2(1)             Babeltrace 2 manual            BABELTRACE2(1)

NAME         top

       babeltrace2 - Convert or process one or more traces, and more

SYNOPSIS         top

       babeltrace2 [--debug | --verbose | --log-level=LVL]
                   [--omit-home-plugin-path] [--omit-system-plugin-path]
                   [--plugin-path=PATH[:PATH]...] [CMD] [CMD ARGS]

DESCRIPTION         top

       babeltrace2 is an open-source trace converter and processor
       command-line program. The tool can open one or more traces and
       convert between multiple formats, possibly with one or more
       filters in the conversion path, and perform other operations
       depending on the command CMD (see “COMMANDS”).

           Note
           You might be looking for the babeltrace2-convert(1) command’s
           manual page; the convert command is the default command of
           babeltrace2 and is backward compatible with babeltrace(1).

           See “EXAMPLES” for convert command examples.

       See babeltrace2-intro(7) to learn more about the Babeltrace 2
       project and its core concepts.

       Most of the babeltrace2 commands load Babeltrace 2 plugins to
       perform their operation. The search path for Babeltrace 2 plugins
       is, in this order:

        1. The colon-separated (or semicolon, on Windows) list of
           directories in the BABELTRACE_PLUGIN_PATH environment
           variable.

        2. The colon-separated (or semicolon, on Windows) list of
           directories in the --plugin-path option.

        3. $HOME/.local/lib/babeltrace2/plugins

        4. /usr/local/lib/babeltrace2/plugins

       You can use the babeltrace2-list-plugins(1) command to
       dynamically list the available plugins and what they offer. See
       “PROJECT’S PLUGINS” for a list of plugins shipped with
       Babeltrace 2.

OPTIONS         top

       -d, --debug
           Legacy option: this is equivalent to --log-level=TRACE.

       -l LVL, --log-level=LVL
           Set the log level of all known Babeltrace 2 loggers to LVL,
           including individual components for the
           babeltrace2-convert(1) and babeltrace2-run(1) commands.

           You can override the log level of a specific component with
           the --log-level option of the babeltrace2-convert(1) or
           babeltrace2-run(1) commands.

           You can override the log level of the library with the
           LIBBABELTRACE2_INIT_LOG_LEVEL environment variable.

           You can override the log level of the CLI with the
           BABELTRACE_CLI_LOG_LEVEL environment variable.

           You can override the log level of the Babeltrace 2 Python
           bindings with the BABELTRACE_PYTHON_BT2_LOG_LEVEL environment
           variable.

           The available values for LVL are:

           NONE, N
               Logging is disabled.

           FATAL, F
               Severe errors that lead the execution to abort
               immediately.

               This level should be enabled in production.

           ERROR, E
               Errors that might still allow the execution to continue.

               Usually, once one or more errors are reported at this
               level, the application, plugin, or library won’t perform
               any more useful task, but it should still exit cleanly.

               This level should be enabled in production.

           WARN, WARNING, W
               Unexpected situations which still allow the execution to
               continue.

               This level should be enabled in production.

           INFO, I
               Informational messages that highlight progress or
               important states of the application, plugins, or library.

               This level can be enabled in production.

           DEBUG, D
               Debugging information, with a higher level of details
               than the TRACE level.

               This level should NOT be enabled in production.

           TRACE, T
               Low-level debugging context information.

               This level should NOT be enabled in production.

       --omit-home-plugin-path
           Do not search for plugins in
           $HOME/.local/lib/babeltrace2/plugins.

       --omit-system-plugin-path
           Do not search for plugins in
           /usr/local/lib/babeltrace2/plugins.

       --plugin-path=PATH[:PATH]...
           Add PATH to the list of paths in which plugins can be found.

       -v, --verbose
           Legacy option: this is equivalent to --log-level=INFO.

           If CMD is convert or is missing, then this also sets the
           verbose parameter of the implicit sink.text.pretty component
           (see babeltrace2-sink.text.pretty(7)) to true.

       -h, --help
           Show help and quit.

       -V, --version
           Show version and quit.

COMMANDS         top

       The following commands also have their own --help option.

       convert
           Convert one or more traces to a given format, possibly with
           filters in the conversion path.

           This is the default command: you don’t need to explicitly
           specify this command’s name to use it.

           This command is backward compatible with the babeltrace(1)
           program.

           See babeltrace2-convert(1).

       help
           Get help for a specific plugin or plugin’s component class.

           See babeltrace2-help(1).

       list-plugins
           List the available Babeltrace 2 plugins and their component
           classes.

           See babeltrace2-list-plugins(1).

       query
           Query an object from a component class.

           See babeltrace2-query(1).

       run
           Build a trace processing graph and run it.

           See babeltrace2-run(1).

PROJECT’S PLUGINS         top

       The following plugins are provided by the Babeltrace 2 project
       itself.

       babeltrace2-plugin-ctf(7)
           CTF trace input (from the file system and from the LTTng-live
           protocol) and output to the file system.

           Component classes:

           •   babeltrace2-source.ctf.fs(7)babeltrace2-source.ctf.lttng-live(7)babeltrace2-sink.ctf.fs(7)

       babeltrace2-plugin-lttng-utils(7)
           Processing graph utilities for LTTng traces.

           Component class:

           •   babeltrace2-filter.lttng-utils.debug-info(7)

       babeltrace2-plugin-text(7)
           Plain text input and output.

           Component classes:

           •   babeltrace2-source.text.dmesg(7)babeltrace2-sink.text.details(7)babeltrace2-sink.text.pretty(7)

       babeltrace2-plugin-utils(7)
           Processing graph utilities.

           Component classes:

           •   babeltrace2-filter.utils.muxer(7)babeltrace2-filter.utils.trimmer(7)babeltrace2-sink.utils.counter(7)babeltrace2-sink.utils.dummy(7)

EXAMPLES         top

       The following examples are the same as the babeltrace2-convert(1)
       manual page’s examples because convert is the default babeltrace2
       program’s command.

       Example 1. Pretty-print the events, in order, of one or more CTF
       traces.

           $ babeltrace2 my-ctf-traces

           $ babeltrace2 my-ctf-traces

           $ babeltrace2 my-ctf-trace-1 my-ctf-trace-2 my-ctf-trace-3

       Example 2. Trim a CTF trace and pretty-print the events.

           $ babeltrace2 my-ctf-trace --begin=22:55:43.658582931 \
                                      --end=22:55:46.967687564

           $ babeltrace2 my-trace --begin=22:55:43.658582931

           $ babeltrace2 my-trace --end=22:55:46.967687564

           $ babeltrace2 my-trace --timerange=22:55:43,22:55:46.967687564

       Example 3. Trim a CTF trace, enable the stream intersection mode,
       and write a CTF trace.

           $ babeltrace2 my-ctf-trace --stream-intersection \
                         --timerange=22:55:43,22:55:46.967687564 \
                         --output-format=ctf --output=out-ctf-trace

       Example 4. Print the available remote LTTng sessions (through
       LTTng live).

           $ babeltrace2 --input-format=lttng-live net://localhost

       Example 5. Pretty-print LTTng live events.

           $ babeltrace2 net://localhost/host/myhostname/my-session-name

       Example 6. Record LTTng live traces to the file system (as CTF
       traces).

           $ babeltrace2 net://localhost/host/myhostname/my-session-name \
                         --params=session-not-found-action=end \
                         --output-format=ctf --output=out-ctf-traces

       Example 7. Read a CTF trace as fast as possible using a dummy
       output.

           $ babeltrace2 my-trace --output-format=dummy

       Example 8. Read three CTF traces in stream intersection mode, add
       debugging information, and pretty-print them to a file.

           $ babeltrace2 ctf-trace1 ctf-trace2 ctf-trace3 --stream-intersection \
                         --debug-info --output=pretty-out

       Example 9. Pretty-print a CTF trace and traces from an explicit
       source component, with the event times showed in seconds since
       the Unix epoch.

           $ babeltrace2 ctf-trace --component=src.my-plugin.my-src \
                         --params='path="spec-trace",output-some-event-type=yes' \
                         --clock-seconds

       Example 10. Send LTTng live events to an explicit sink component.

           $ babeltrace2 net://localhost/host/myhostname/mysession \
                         --component=sink.my-plugin.my-sink

       Example 11. Trim a CTF trace, add debugging information, apply an
       explicit filter component, and write as a CTF trace.

           $ babeltrace2 /path/to/ctf/trace --timerange=22:14:38,22:15:07 \
                         --debug-info --component=filter.my-plugin.my-filter \
                         --params=criteria=xyz,ignore-abc=yes \
                         --output-format=ctf --output=out-ctf-trace

       Example 12. Print the metadata text of a CTF trace.

           $ babeltrace2 /path/to/ctf/trace --output-format=ctf-metadata

ENVIRONMENT VARIABLES         top

   Babeltrace 2 library
       BABELTRACE_EXEC_ON_ABORT=CMDLINE
           Execute the command line CMDLINE, as parsed like a UNIX 98
           shell, when any part of the Babeltrace 2 project unexpectedly
           aborts.

           The application only aborts when the executed command
           returns, ignoring its exit status.

           This environment variable is ignored when the application has
           the setuid or the setgid access right flag set.

       BABELTRACE_TERM_COLOR=(AUTO | NEVER | ALWAYS)
           Force the terminal color support for the babeltrace2(1)
           program and the project’s plugins.

           The available values are:

           AUTO
               Only emit terminal color codes when the standard output
               and error streams are connected to a color-capable
               terminal.

           NEVER
               Never emit terminal color codes.

           ALWAYS
               Always emit terminal color codes.

       BABELTRACE_TERM_COLOR_BRIGHT_MEANS_BOLD=0
           Set to 0 to emit SGR (see
           <https://en.wikipedia.org/wiki/ANSI_escape_code>) codes 90 to
           97 for bright colors instead of bold (SGR code 1) and
           standard color codes (SGR codes 30 to 37).

       BABELTRACE_PLUGIN_PATH=PATHS
           Set the list of directories, in order, in which dynamic
           plugins can be found before other directories are considered
           to PATHS (colon-separated, or semicolon on Windows).

       LIBBABELTRACE2_DISABLE_PYTHON_PLUGINS=1
           Disable the loading of any Babeltrace 2 Python plugin.

       LIBBABELTRACE2_INIT_LOG_LEVEL=LVL
           Force the Babeltrace 2 library’s initial log level to be LVL.

           If this environment variable is set, it overrides the log
           level set by the --log-level option for the Babeltrace 2
           library logger.

           The available values for LVL are:

           NONE, N
               Logging is disabled.

           FATAL, F
               Severe errors that lead the execution to abort
               immediately.

               This level should be enabled in production.

           ERROR, E
               Errors that might still allow the execution to continue.

               Usually, once one or more errors are reported at this
               level, the application, plugin, or library won’t perform
               any more useful task, but it should still exit cleanly.

               This level should be enabled in production.

           WARN, WARNING, W
               Unexpected situations which still allow the execution to
               continue.

               This level should be enabled in production.

           INFO, I
               Informational messages that highlight progress or
               important states of the application, plugins, or library.

               This level can be enabled in production.

           DEBUG, D
               Debugging information, with a higher level of details
               than the TRACE level.

               This level should NOT be enabled in production.

           TRACE, T
               Low-level debugging context information.

               This level should NOT be enabled in production.

       LIBBABELTRACE2_NO_DLCLOSE=1
           Make the Babeltrace 2 library leave any dynamically loaded
           modules (plugins and plugin providers) open at exit. This can
           be useful for debugging purposes.

       LIBBABELTRACE2_PLUGIN_PROVIDER_DIR=DIR
           Set the directory from which the Babeltrace 2 library
           dynamically loads plugin provider shared objects to DIR.

           If this environment variable is set, it overrides the default
           plugin provider directory.

   Babeltrace 2 Python bindings
       BABELTRACE_PYTHON_BT2_LOG_LEVEL=LVL
           Force the Babeltrace 2 Python bindings log level to be LVL.

           If this environment variable is set, it overrides the log
           level set by the --log-level option for the Python bindings
           logger.

           The available values for LVL are:

           NONE, N
               Logging is disabled.

           FATAL, F
               Severe errors that lead the execution to abort
               immediately.

               This level should be enabled in production.

           ERROR, E
               Errors that might still allow the execution to continue.

               Usually, once one or more errors are reported at this
               level, the application, plugin, or library won’t perform
               any more useful task, but it should still exit cleanly.

               This level should be enabled in production.

           WARN, WARNING, W
               Unexpected situations which still allow the execution to
               continue.

               This level should be enabled in production.

           INFO, I
               Informational messages that highlight progress or
               important states of the application, plugins, or library.

               This level can be enabled in production.

           DEBUG, D
               Debugging information, with a higher level of details
               than the TRACE level.

               This level should NOT be enabled in production.

           TRACE, T
               Low-level debugging context information.

               This level should NOT be enabled in production.

   CLI
       BABELTRACE_CLI_LOG_LEVEL=LVL
           Force babeltrace2 CLI’s log level to be LVL.

           If this environment variable is set, it overrides the log
           level set by the --log-level option for the CLI logger.

           The available values for LVL are:

           NONE, N
               Logging is disabled.

           FATAL, F
               Severe errors that lead the execution to abort
               immediately.

               This level should be enabled in production.

           ERROR, E
               Errors that might still allow the execution to continue.

               Usually, once one or more errors are reported at this
               level, the application, plugin, or library won’t perform
               any more useful task, but it should still exit cleanly.

               This level should be enabled in production.

           WARN, WARNING, W
               Unexpected situations which still allow the execution to
               continue.

               This level should be enabled in production.

           INFO, I
               Informational messages that highlight progress or
               important states of the application, plugins, or library.

               This level can be enabled in production.

           DEBUG, D
               Debugging information, with a higher level of details
               than the TRACE level.

               This level should NOT be enabled in production.

           TRACE, T
               Low-level debugging context information.

               This level should NOT be enabled in production.

       BABELTRACE_CLI_WARN_COMMAND_NAME_DIRECTORY_CLASH=0
           Disable the warning message which babeltrace2-convert(1)
           prints when you convert a trace with a relative path that’s
           also the name of a babeltrace2 command.

       BABELTRACE_DEBUG=1
           Legacy variable: equivalent to setting the --log-level option
           to TRACE.

       BABELTRACE_VERBOSE=1
           Legacy variable: equivalent to setting the --log-level option
           to INFO.

FILES         top

       $HOME/.local/lib/babeltrace2/plugins
           User plugin directory.

       /usr/local/lib/babeltrace2/plugins
           System plugin directory.

       /usr/local/lib/babeltrace2/plugin-providers
           System plugin provider directory.

EXIT STATUS         top

       0 on success, 1 otherwise.

BUGS         top

       If you encounter any issue or usability problem, please report it
       on the Babeltrace bug tracker (see
       <https://bugs.lttng.org/projects/babeltrace>).

RESOURCES         top

       The Babeltrace project shares some communication channels with
       the LTTng project (see <https://lttng.org/>).

       •   Babeltrace website (see <https://babeltrace.org/>)

       •   Mailing list (see <https://lists.lttng.org>) for support and
           development: lttng-dev@lists.lttng.org

       •   IRC channel (see <irc://irc.oftc.net/lttng>): #lttng on
           irc.oftc.net

       •   Bug tracker (see
           <https://bugs.lttng.org/projects/babeltrace>)

       •   Git repository (see
           <https://git.efficios.com/?p=babeltrace.git>)

       •   GitHub project (see <https://github.com/efficios/babeltrace>)

       •   Continuous integration (see
           <https://ci.lttng.org/view/Babeltrace/>)

       •   Code review (see
           <https://review.lttng.org/q/project:babeltrace>)

AUTHORS         top

       The Babeltrace 2 project is the result of hard work by many
       regular developers and occasional contributors.

       The current project maintainer is Jérémie Galarneau
       <mailto:jeremie.galarneau@efficios.com>.

COPYRIGHT         top

       This program is part of the Babeltrace 2 project.

       Babeltrace is distributed under the MIT license (see
       <https://opensource.org/licenses/MIT>).

SEE ALSO         top

       babeltrace2-intro(7), babeltrace2-convert(1),
       babeltrace2-help(1), babeltrace2-list-plugins(1),
       babeltrace2-query(1), babeltrace2-run(1)

COLOPHON         top

       This page is part of the babeltrace (trace read and write
       libraries and a trace converter) project.  Information about the
       project can be found at ⟨http://www.efficios.com/babeltrace⟩.  If
       you have a bug report for this manual page, send it to
       lttng-dev@lists.lttng.org.  This page was obtained from the
       project's upstream Git repository
       ⟨git://git.efficios.com/babeltrace.git⟩ on 2021-08-27.  (At that
       time, the date of the most recent commit that was found in the
       repository was 2021-08-20.)  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

Babeltrace 2.1.0-rc1        14 September 2019             BABELTRACE2(1)

Pages that refer to this page: babeltrace2(1)babeltrace2-convert(1)babeltrace2-help(1)babeltrace2-list-plugins(1)babeltrace2-log(1)babeltrace2-query(1)babeltrace2-run(1)babeltrace2-intro(7)babeltrace2-sink.text.details(7)babeltrace2-sink.text.pretty(7)