Linux ctrl-x 在终端中使用时发送哪个信号？
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Which signal does ctrl-x send when used in a terminal?
提问by imacake
On Linux/Unix there are signals. The CtrlCone (SIGINT) is obvious to me.
Now, in some other applications there are signals via CtrlX?!
Is that even a signal or does it generate an escape sequence?
Is there anything else I can use as something similar to CtrlC( CtrlV, CtrlX...)?
在 Linux/Unix 上有信号。在CtrlC一个（SIGINT）是显而易见的我。现在，在其他一些应用中，信号通过CtrlX?! 这甚至是一个信号还是它会生成一个转义序列？还有什么我可以用作类似于CtrlC( CtrlV, CtrlX...) 的东西吗？
If anyone has a clue, im familiar with C more than bash, but answers in both languages are appreciated!
如果有人有线索，我对 C 比 bash 更熟悉，但对两种语言的答案表示赞赏！
采纳答案by jfg956
To get all the terminal control character assignments:
要获取所有终端控制字符分配：
stty -a
回答by Damon
There is possibly a misunderstanding. CtrlCdoes not generate a signal. It is perfectly possible to press CtrlCanywhere, and no bad things will happen (for example in every text editor or word processor, that's the de-facto-standard for "copy").
可能有误会。CtrlC不产生信号。完全可以按CtrlC任何地方，并且不会发生坏事（例如在每个文本编辑器或文字处理器中，这是“复制”的事实上的标准）。
However, when you run a program in the shell, then your keypresses really go into the shell, not into your program. The shell will forward (almost) everything to your program's stdin, and forward anything coming from stdout to either the terminal or another process or a file (if you used a pipe or redirection).
但是，当您在 shell 中运行程序时，您的按键实际上会进入 shell，而不是进入您的程序。shell 会将（几乎）所有内容转发到程序的 stdin，并将来自 stdout 的任何内容转发到终端或另一个进程或文件（如果您使用管道或重定向）。
If the shell sees you press CtrlC, then the shell sends the interrupt signal. But that's really just something the shell does, not something that magically happens because of the key combination.
如果 shell 看到您按下CtrlC，则shell 发送中断信号。但这实际上只是 shell 所做的事情，而不是因为组合键而神奇地发生的事情。
About CtrlX, you probably meant CtrlZ. This stops a process, and the shell outputs a number which you can use with fgto make it run again.
关于CtrlX，你大概是说CtrlZ。这会停止一个进程，shell 会输出一个数字，您可以使用该数字fg使其再次运行。
回答by ninjalj
The terminal assigns special meaning to certain key sequences. This include deleting a character, deleting to the start of line ( CtrlU), ...
终端赋予某些按键序列特殊的含义。这包括删除一个字符、删除到行首 ( CtrlU)、...
Specifically, when the terminal ISIGlocal mode is enabled:
具体来说，当终端ISIG本地模式开启时：
VINTR(usually CtrlC) generates aSIGINT(interrupted by user).VQUIT(usually Ctrl\) generates aSIGQUIT(like SIGINT, but also dump core).VSUSP(usually CtrlZ) generates aSIGTSTP(stop by terminal I/O).VDSUSP(on some systems, not on Linux) generates aSIGTSTPwhen the program tries to read it.
VINTR（通常CtrlC）生成SIGINT（被用户打断）。VQUIT（通常Ctrl\）生成SIGQUIT（如 SIGINT，但也转储核心）。VSUSP（通常CtrlZ）生成SIGTSTP（通过终端 I/O 停止）。VDSUSP（在某些系统上，而不是在 Linux 上）SIGTSTP当程序试图读取它时会生成一个。
The above are configurable. This is documented on the termios(3)manpage.
以上是可配置的。这记录在termios(3)联机帮助页中。
回答by Nobilis
From Wikipedia
来自维基百科
CtrlxCtrle: Edits the current line in the $EDITOR program, or vi if undefined.
CtrlxCtrlr: Read in the contents of the inputrc file, and incorporate any bindings or variable assignments found there.
CtrlxCtrlu: Incremental undo, separately remembered for each line.
CtrlxCtrlv: Display version information about the current instance of bash.
CtrlxCtrlx: Alternates the cursor with its old position. (C-x, because x has a crossing shape).
CtrlxCtrle: 编辑 $EDITOR 程序中的当前行，如果未定义，则编辑 vi。
CtrlxCtrlr：读入 inputrc 文件的内容，并合并在那里找到的任何绑定或变量分配。
CtrlxCtrlu: 增量撤销，每行单独记住。
CtrlxCtrlv: 显示当前 bash 实例的版本信息。
CtrlxCtrlx: 将光标与其旧位置交替。（Cx，因为x 具有交叉形状）。
One additional usage of Ctrlxis to expand the *when typing a command in the shell.
的另一种用法Ctrlx是*在 shell 中键入命令时扩展。
Say you have:
说你有：
$ ls *
Pressing Ctrlxand then *will expand *to all items in the current directory to something like this:
按Ctrlx然后*将扩展*到当前目录中的所有项目，如下所示：
$ ls dir1 dir2 file1 file2 file3`
You can also refer to this topic on SuperUserfor the usage I described above.
回答by jww
On Linux/Unix there are signals. The Ctrl+Cone (
SIGINT) is obvious to me...
在 Linux/Unix 上有信号。在Ctrl+C一个（
SIGINT）的明显，我...
If you need a list of signals available on your system, then signum.hcan be helpful. Below is from Debian 7.3:
如果您需要系统上可用的信号列表，那么signum.h可能会有所帮助。以下来自 Debian 7.3：
/* Signals. */
#define SIGHUP 1 /* Hangup (POSIX). */
#define SIGINT 2 /* Interrupt (ANSI). */
#define SIGQUIT 3 /* Quit (POSIX). */
#define SIGILL 4 /* Illegal instruction (ANSI). */
#define SIGTRAP 5 /* Trace trap (POSIX). */
#define SIGABRT 6 /* Abort (ANSI). */
#define SIGIOT 6 /* IOT trap (4.2 BSD). */
#define SIGBUS 7 /* BUS error (4.2 BSD). */
#define SIGFPE 8 /* Floating-point exception (ANSI). */
#define SIGKILL 9 /* Kill, unblockable (POSIX). */
#define SIGUSR1 10 /* User-defined signal 1 (POSIX). */
#define SIGSEGV 11 /* Segmentation violation (ANSI). */
#define SIGUSR2 12 /* User-defined signal 2 (POSIX). */
#define SIGPIPE 13 /* Broken pipe (POSIX). */
#define SIGALRM 14 /* Alarm clock (POSIX). */
#define SIGTERM 15 /* Termination (ANSI). */
#define SIGSTKFLT 16 /* Stack fault. */
#define SIGCLD SIGCHLD /* Same as SIGCHLD (System V). */
#define SIGCHLD 17 /* Child status has changed (POSIX). */
#define SIGCONT 18 /* Continue (POSIX). */
#define SIGSTOP 19 /* Stop, unblockable (POSIX). */
#define SIGTSTP 20 /* Keyboard stop (POSIX). */
#define SIGTTIN 21 /* Background read from tty (POSIX). */
#define SIGTTOU 22 /* Background write to tty (POSIX). */
#define SIGURG 23 /* Urgent condition on socket (4.2 BSD). */
#define SIGXCPU 24 /* CPU limit exceeded (4.2 BSD). */
#define SIGXFSZ 25 /* File size limit exceeded (4.2 BSD). */
#define SIGVTALRM 26 /* Virtual alarm clock (4.2 BSD). */
#define SIGPROF 27 /* Profiling alarm clock (4.2 BSD). */
#define SIGWINCH 28 /* Window size change (4.3 BSD, Sun). */
#define SIGPOLL SIGIO /* Pollable event occurred (System V). */
#define SIGIO 29 /* I/O now possible (4.2 BSD). */
#define SIGPWR 30 /* Power failure restart (System V). */
#define SIGSYS 31 /* Bad system call. */
#define SIGUNUSED 31
#define _NSIG 65 /* Biggest signal number + 1
(including real-time signals). */
#define SIGRTMIN (__libc_current_sigrtmin ())
#define SIGRTMAX (__libc_current_sigrtmax ())
