NAME¶
vt-is-UTF8 - check whether current VT is in UTF8- or byte-mode.
检查当前VT是否处于VTF8模式或是字节模式.
vt-is-UTF8 [-h|--help]
[-V|--version]
[-q|--quiet]
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.
vt-is-UTF8
检查当前VT是否处于 UTF8
模式,
其方式是写(并且随后擦除)
一个 3 字节的 UTF8 序列,
然后察看控制台驱动展示了多少个字符.
A message telling in which mode the console is is then written to stdout (except
if the
--quiet option was given).
然后会在标准输出上给出一个信息,
指出控制台所用模式(除非给出了
--quiet 选项).
If the
--quiet option is not given, the value returned is 1 if an error
occurs, else 0. 在有错误发生时,
如果没有选取
--quiet
选项, 返回值将是 1 ,
否则将是 0 .
- -h --help
- display version number, a short help message and exit.
展示版本号,
以及一个简短的帮助信息,
然后退出.
- -V --version
- display version number and exit.
展示版本号然后退出.
- -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.
不在标准输出上打印所处模式,
但是返回一个状态,
对于 UTF8
模式该退出状态为 1 ,
而对于字节模式该状态为
0 . 如果发生错误,
也返回 0 ,
并且送给标准错误一个信息.
BUGS¶
The check should be done by directly asking the kernel, which is not possible as
of kernels 2.0.x.
模式的检查可能应该通过直接请求内核来进行,
但从内核 2.0.x
开始这就不可能了.
As of kernel 2.0.35, the byte-mode is sometimes erroneously detected as
UTF8-mode, after switching from a 512-chars font to a 256-chars font. This is
probably a console-driver bug. 从 2.0.35
的内核开始, 在做了从 512
字符字体到 256
字符字体的切换后,
字节模式有时会被错误地认为是
UTF8 模式.
这或许就是一个控制台驱动的
bug .
unicode_start(1),
unicode_stop(1).