NAME

       lttng-view - View the traces of an LTTng tracing session

SYNOPSIS

       lttng [GENERAL OPTIONS] view [--viewer=CMD] [--trace-path=PATH | SESSION]

DESCRIPTION

       The lttng view command launches an external trace viewer to view the current trace of a tracing session.

       If SESSION is omitted, the viewer is launched for the current tracing session (see lttng-create(1) for
       more information about the current tracing session). Otherwise, it is launched for the existing tracing
       session named SESSION. lttng list outputs all the existing tracing sessions (see lttng-list(1)).

       By default, the babeltrace(1) trace viewer is launched. Another trace viewer command can be specified
       using the --viewer option.

       By default, the trace path of the chosen tracing session is given as the first positional argument to the
       trace viewer. This path can be overridden using the --trace-path option.

OPTIONS

       General options are described in lttng(1).

       -t PATH, --trace-path=PATH
           View trace at path PATH instead of using the chosen tracing session’s trace path.

       -e CMD, --viewer=CMD
           Use CMD as the trace viewer.

   Program information
       -h, --help
           Show command help.

           This option, like lttng-help(1), attempts to launch /usr/bin/man to view the command’s man page. The
           path to the man pager can be overridden by the LTTNG_MAN_BIN_PATH environment variable.

       --list-options
           List available command options.

ENVIRONMENT VARIABLES

       LTTNG_ABORT_ON_ERROR
           Set to 1 to abort the process after the first error is encountered.

       LTTNG_HOME
           Overrides the $HOME environment variable. Useful when the user running the commands has a
           non-writable home directory.

       LTTNG_MAN_BIN_PATH
           Absolute path to the man pager to use for viewing help information about LTTng commands (using lttng-
           help(1) or lttng COMMAND --help).

       LTTNG_SESSION_CONFIG_XSD_PATH
           Path in which the session.xsd session configuration XML schema may be found.

       LTTNG_SESSIOND_PATH
           Full session daemon binary path.

           The --sessiond-path option has precedence over this environment variable.

       Note that the lttng-create(1) command can spawn an LTTng session daemon automatically if none is running.
       See lttng-sessiond(8) for the environment variables influencing the execution of the session daemon.

FILES

       $LTTNG_HOME/.lttngrc
           User LTTng runtime configuration.

           This is where the per-user current tracing session is stored between executions of lttng(1). The
           current tracing session can be set with lttng-set-session(1). See lttng-create(1) for more
           information about tracing sessions.

       $LTTNG_HOME/lttng-traces
           Default output directory of LTTng traces. This can be overridden with the --output option of the
           lttng-create(1) command.

       $LTTNG_HOME/.lttng
           User LTTng runtime and configuration directory.

       $LTTNG_HOME/.lttng/sessions
           Default location of saved user tracing sessions (see lttng-save(1) and lttng-load(1)).

       /usr/local/etc/lttng/sessions
           System-wide location of saved tracing sessions (see lttng-save(1) and lttng-load(1)).

           Note

           $LTTNG_HOME defaults to $HOME when not explicitly set.

EXIT STATUS

       0
           Success

       1
           Command error

       2
           Undefined command

       3
           Fatal error

       4
           Command warning (something went wrong during the command)

BUGS

       If you encounter any issue or usability problem, please report it on the LTTng bug tracker
       <https://bugs.lttng.org/projects/lttng-tools>.

RESOURCES

       •   LTTng project website <http://lttng.org>

       •   LTTng documentation <http://lttng.org/docs>

       •   Git repositories <http://git.lttng.org>

       •   GitHub organization <http://github.com/lttng>

       •   Continuous integration <http://ci.lttng.org/>

       •   Mailing list <http://lists.lttng.org> for support and development: lttng-dev@lists.lttng.org

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

COPYRIGHTS

       This program is part of the LTTng-tools project.

       LTTng-tools is distributed under the GNU General Public License version 2
       <http://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html>. See the LICENSE
       <https://github.com/lttng/lttng-tools/blob/master/LICENSE> file for details.

THANKS

       Special thanks to Michel Dagenais and the DORSAL laboratory <http://www.dorsal.polymtl.ca/> at École
       Polytechnique de Montréal for the LTTng journey.

       Also thanks to the Ericsson teams working on tracing which helped us greatly with detailed bug reports
       and unusual test cases.

AUTHORS

       LTTng-tools was originally written by Mathieu Desnoyers, Julien Desfossez, and David Goulet. More people
       have since contributed to it.

       LTTng-tools is currently maintained by Jérémie Galarneau <mailto:jeremie.galarneau@efficios.com>.

SEE ALSO

       lttng(1)

LTTng 2.10.2                                       02/05/2018                                      LTTNG-VIEW(1)