$> file
在bash(也是破折号)中,文件被截断(或者如果它不存在则创建),然后提示返回.在zsh中,文件被截断/创建,但它会挂起.您必须使用Ctrl-C才能再次使用提示.
zsh$cat nonempty.file > file zsh$
问题是：
是否期望这种行为？ zsh错了吗？
更新：
在zsh手册中找到了这个：
REDIRECTIONS WITH NO COMMAND:
When a simple command consists of one or more redirection operators and zero or more parameter assignments,but no command name,
zshcan behave in several ways.If the parameter
NULLCMDis not set or the optionCSH_NULLCMDis set,an error is caused. This is thecshbehavior
andCSH_NULLCMDis set by default when emulatingcsh.If the option
SH_NULLCMDis set,the builtin:is inserted as a command with the given redirections. This is the
default when emulatingshorksh.Otherwise,if the parameter
NULLCMDis set,its value will be used as a command with the given redirections. If both
NULLCMDandREADNULLCMDare set,then the value of the latter will be used instead of that of the former when the
redirection is an input. The default forNULLCMDiscatand forREADNULLCMDismore.在我的系统上,默认为：
$echo $ZSH_VERSION 4.3.10 $echo $NULLCMD cat $echo $READNULLCMD /usr/bin/pager $
