readarray 是否允许指定行分隔符？

Question

在 bashread内置命令中-d，我们必须指定换行符以外的行分隔符

是否readarray提供了一些指定行分隔符的方法？

• 它没有为此目的的选择是否正确？
• 是否有用于此目的的外壳默认变量，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
...

Answer 1

从 bash 4.4 版开始，是的。从发布公告Bash-4.4 Release Available：

最显着的新特性是 mapfile 能够使用任意记录分隔符；

（readarray作为 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.