如果我想获得 bash 内置命令的简短使用消息,我可以help <builtin>
在命令提示符下使用,例如
$ help export
export: export [-fn] [name[=value] ...] or export -p
Set export attribute for shell variables.
Marks each NAME for automatic export to the environment of subsequently
executed commands. If VALUE is supplied, assign VALUE before exporting.
Options:
-f refer to shell functions
-n remove the export property from each NAME
-p display a list of all exported variables and functions
An argument of `--' disables further option processing.
Exit Status:
Returns success unless an invalid option is given or NAME is invalid.
我怎样才能在 zsh 中做到这一点?我试过了
% export --help
zsh: bad option: -e
和
% help export
zsh: command not found: help
此外,“帮助”一词不在 中的任何地方man zshbuiltins
。
答案1
感谢@don_crissti 通过此链接Arch 维基文档。
由于某种原因,Arch wiki 上的代码在调用时导致此错误
/home/velour/.zshrc:unalias:368:没有这样的哈希表元素:run-help
zsh --版本 => zsh 5.1.1 (x86_64-ubuntu-linux-gnu)
因此,为了使其正常工作,我将以下块添加到~/.zshrc
,然后注释掉别名命令。
autoload -Uz run-help
autoload -Uz run-help-git
autoload -Uz run-help-svn
autoload -Uz run-help-svk
#unalias run-help
#alias help=run-help
并简单地调用
run-help <builtin>
所以现在我明白了
% run-help export
export [ name[=value] ... ]
The specified names are marked for automatic export to the envi-
ronment of subsequently executed commands. Equivalent to type-
set -gx. If a parameter specified does not already exist, it is
created in the global scope.
答案2
答案3
添加以下内容.zshrc
对我有用。
(基于 the_velour_fog 的答案)
unalias run-help
alias help=run-help
autoload -Uz run-help
之前run-help
是 的别名man
。
$ zsh --version
zsh 5.9 (x86_64-apple-darwin18.7.0)
$ zsh
\$ type run-help
run-help is an alias for man
\$ unalias run-help
\$ type run-help
run-help not found
\$ autoload -Uz run-help
\$ type run-help
run-help is an autoload shell function
\$ alias help=run-help
\$ help export
export [ name[=value] ... ]
The specified names are marked for automatic export to the envi-
ronment of subsequently executed commands. Equivalent to type-
set -gx. If a parameter specified does not already exist, it is
created in the global scope.
答案4
他们有自己的手册页:
man zshbuiltins