vt-is-UTF8 - check whether current VT is in UTF8- or byte-
mode.
SYNOPSIS
vt-is-UTF8 [-h|--help] [-V|--version] [-q|--quiet]
DESCRIPTION
vt-is-UTF8 checks whether the current VT is in UTF8 mode,
by writing (and erasing afterwards) a 3-byte-long UTF8
sequence, and looking how much chars where displayed by
the console driver.
A message telling in which mode the console is is then
written to stdout (except if the --quiet option was
given).
If the --quiet option is not given, the value returned is
1 if an error occurs, else 0.
OPTIONS
-h --help
display version number, a short help message and
exit.
-V --version
display version number and exit.
-q --quiet
do not print on stdout in with mode we are, but
return the state as exit-status 1 if in UTF8-mode,
0 if in byte-mode. In case of error, 0 is returned
and a message is displayed on stderr.
BUGS
The check should be done by directly asking the kernel,
which is not possible as of kernels 2.0.x.
As of kernel 2.0.35, the byte-mode is sometimes erro
neously detected as UTF8-mode, after switching from a
512-chars font to a 256-chars font. This is probably a
console-driver bug.
SEE ALSO
unicode_start(1), unicode_stop(1).
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