`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 man: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
    https://en.wikipedia.org/wiki/ANSI_escape_code[SGR]
    codes 90 to 97 for bright colors instead of
    bold (SGR code~1) and standard color codes (SGR codes 30 to 37).