shell?

waker

回复  cjaizss


    cat aa
是这个意思吧吧，
cat 0默认0描述符，读入
cat (刚才读入的内容)  1> ...
tt_yy123 发表于 2011-11-27 15:47

不是这个意思

Opening File Descriptors for Reading and Writing

The redirection operator
    [n]<>word
causes the file whose name is the expansion of word to be opened for both reading and writing on file descriptor n, or on file descriptor 0 if n is not specified. If the file does not exist, it is created.

manpage里讲的很清楚了

waker

回复 8# tt_yy123


   很正常