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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.

总览

       vt-is-UTF8 [-h|--help] [-V|--version] [-q|--quiet]

描述

       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 .

选项

       -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 .

另见

       unicode_start(1), unicode_stop(1).