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readarray 是否允许指定行分隔符？

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readarray 是否允许指定行分隔符？

在 bash 中read，内置命令可以-d让我们指定换行符以外的行分隔符

是否readarray提供某种方式来指定行分隔符？

  • 它没有用于此目的的选项，这是正确的吗？
  • 是否有用于此目的的 shell 默认变量，类似于IFS字段分隔符？

谢谢。

看到steeldriver的评论后，

$ bash --version
GNU bash, version 4.4.19(1)-release (x86_64-pc-linux-gnu)
Copyright (C) 2016 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>

This is free software; you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

$ help readarray
readarray: readarray [-n count] [-O origin] [-s count] [-t] [-u fd] [-C callback] [-c quantum] [array]
    Read lines from a file into an array variable.

    A synonym for `mapfile'.

但后来我发现：

$ help mapfile
mapfile: mapfile [-d delim] [-n count] [-O origin] [-s count] [-t] [-u fd] [-C callback] [-c quantum] [array]
    Read lines from the standard input into an indexed array variable.

    Read lines from the standard input into the indexed array variable ARRAY, or
    from file descriptor FD if the -u option is supplied.  The variable MAPFILE
    is the default ARRAY.

    Options:
      -d delim  Use DELIM to terminate lines, instead of newline
...

答案1

从 bash 4.4 版开始，是的。从发布公告来看Bash-4.4 版本可用:

最值得注意的新功能是 Mapfile 使用任意记录分隔符的能力；

（readarray是 的同义词mapfile）。中的描述man bash是

          -d     The first character of delim is used  to  terminate  each
                 input line, rather than newline.

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