readarray允许指定行分隔符吗？

Question

在bash中，read内置有-d，用于指定换行符以外的行分隔符。

readarray提供了一些指定行分隔符的方法吗？

• 为此目的，它没有选择是正确的吗？
• 有类似于字段分隔符的shell默认变量吗？

谢谢。

在我看到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 

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
...

Answer 1

从bash版本4.4开始，是的。发布公告中的可用Bash-4.4版本：

最显著的新特性是mapfile使用任意记录分隔符的能力；

(readarray是mapfile的同义词)。man bash中的描述是

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