一个shell脚本的一条语句不知道怎么理解我最近在学习shell脚本，教材中有一个小脚本，中间有一段代码（读取目
一个shell脚本的一条语句不知道怎么理解
我最近在学习shell脚本，教材中有一个小脚本，中间有一段代码（读取目录下的文件类型），如下
while read file;
do
type=`file -b $file`
let filearray["$type"]++;
done< <(find $path -type f -print)
关键是那个done后面的< <怎么理解？如果写成<<是显然不行的，写成<的时候也报错误 shell
[解决办法] Process Substitution
Process substitution is supported on systems that support named pipes
(FIFOs) or the /dev/fd method of naming open files. It takes the form
of <(list) or >(list). The process list is run with its input or out-
put connected to a FIFO or some file in /dev/fd. The name of this file
is passed as an argument to the current command as the result of the
expansion. If the >(list) form is used, writing to the file will pro-
vide input for list. If the <(list) form is used, the file passed as
an argument should be read to obtain the output of list.
When available, process substitution is performed simultaneously with
parameter and variable expansion, command substitution, and arithmetic
expansion.
[解决办法]〈 输入重定向，将$path目录输入while循环。。
