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bash 中的键盘快捷键 Ch、Cm

tag-icon • tag-icon bash terminal keyboard-shortcuts escape-characters
bash 中的键盘快捷键 Ch、Cm

重击用途GNU 阅读线。 Readline 提供了一系列键盘快捷键。但是，有一些可在 bash 上使用的快捷方式和Readline 中未记录的内容参考。一些例子是：

  • C-h- 与退格键相同
  • C-m- 与 Enter 相同（我猜是 CR）

那么为什么这些捷径有效呢？我想这些可能与ASCII码但我不确定哪个组件将这些控制序列解释为我所指示的行为。

是 Readline 库吗？还是 bash 本身？这是我的终端模拟器吗？是内核吗？ ETC...

是什么组件使这些控制序列以这种方式运行？

编辑：我的.inputrc文件：

# To the extent possible under law, the author(s) have dedicated all 
# copyright and related and neighboring rights to this software to the 
# public domain worldwide. This software is distributed without any warranty. 
# You should have received a copy of the CC0 Public Domain Dedication along 
# with this software. 
# If not, see <http://creativecommons.org/publicdomain/zero/1.0/>. 

# base-files version 4.2-4

# ~/.inputrc: readline initialization file.

# The latest version as installed by the Cygwin Setup program can
# always be found at /etc/defaults/etc/skel/.inputrc

# Modifying /etc/skel/.inputrc directly will prevent
# setup from updating it.

# The copy in your home directory (~/.inputrc) is yours, please
# feel free to customise it to create a shell
# environment to your liking.  If you feel a change
# would be benifitial to all, please feel free to send
# a patch to the cygwin mailing list.

# the following line is actually
# equivalent to "\C-?": delete-char
"\e[3~": delete-char

# VT
"\e[1~": beginning-of-line
"\e[4~": end-of-line

# kvt
"\e[H": beginning-of-line
"\e[F": end-of-line

# rxvt and konsole (i.e. the KDE-app...)
"\e[7~": beginning-of-line
"\e[8~": end-of-line

# VT220
"\eOH": beginning-of-line
"\eOF": end-of-line

# Allow 8-bit input/output
#set meta-flag on
#set convert-meta off
#set input-meta on
#set output-meta on
#$if Bash
  # Don't ring bell on completion
  #set bell-style none

  # or, don't beep at me - show me
  #set bell-style visible

  # Filename completion/expansion
  #set completion-ignore-case on
  #set show-all-if-ambiguous on

  # Expand homedir name
  #set expand-tilde on

  # Append "/" to all dirnames
  #set mark-directories on
  #set mark-symlinked-directories on

  # Match all files
  #set match-hidden-files on

  # 'Magic Space'
  # Insert a space character then performs
  # a history expansion in the line
  #Space: magic-space
#$endif

答案1

当您键入时，会出现绑定（无论它们是否出现在手册中）

bind -p

例如（部分列出）：

"\C-g": abort
"\C-x\C-g": abort
"\e\C-g": abort
"\C-j": accept-line
"\C-m": accept-line
# alias-expand-line (not bound)
# arrow-key-prefix (not bound)
# backward-byte (not bound)
"\C-b": backward-char
# backward-byte (not bound)
"\C-b": backward-char
"\eOD": backward-char
"\e[D": backward-char
"\C-h": backward-delete-char
"\e[3;5~": backward-delete-char
"\C-?": backward-delete-char
"\C-x\C-?": backward-kill-line
"\e\C-h": backward-kill-word
"\e\C-?": backward-kill-word
"\eb": backward-word
"\e<": beginning-of-history

该手册记录了该-p选项：

这bind -p命令显示阅读线函数名称和绑定的格式可以直接放入初始化文件中。看Bash 内置函数。

绑定（阅读源代码）取决于键盘映射。我引用的内容来自于emacs 键盘映射，它是在应用脚本之前从内置表初始化的。有一个相应的文件，其中包含表格vi 键盘映射。

所有这些都是阅读线（与 捆绑在一起bash）。bash启动时，它使用这些表定义绑定。根据它读取的其他文件/etc/inputrc，~/.inputrc它可能会添加、修改或删除其中一些内置绑定。

答案2

正如您所参考的手册的“1.3 Readline Init File”部分所指出的，readline库是可配置的。键绑定可以在/etc/inputrc或本地~/.inputrc.

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