`/ dev / ttyS0`和`/ dev / ttys0`之间的区别？

In Linux, what is the difference between /dev/ttyS0 and /dev/ttys0?

在Linux中,/ dev / ttyS0和/ dev / ttys0之间有什么区别?

I know that the first is a serial port, but what about the second, with the small s?

我知道第一个是串口,但第二个是什么,小s?

3 个解决方案

#1

For a pseudo terminal pair such as ptyp3 and ttyp3, the pty... is the master or controlling terminal and the tty... is the slave. There are only 16 ttyp's: ttyp0-ttypf (f is a hexadecimal digit). To get more pairs, the 3 letters q, r, s may be used instead of p. For example the pair ttys8, ptys8 is a pseudo terminal pair. The master and slave are really the same "port" but the slave is used by the application program and the master is used by a network program (or the like) which supplies (and gets) data to/from the slave port.

对于伪终端对,例如ptyp3和ttyp3,pty ......是主终端或控制终端,而tty ...是从属终端。只有16个ttyp:ttyp0-ttypf(f是十六进制数字)。为了获得更多对,可以使用3个字母q,r,s代替p。例如,对ttys8,ptys8是伪终端对。主设备和从设备实际上是相同的“端口”,但是应用程序使用从设备,并且主设备由向从端口提供(和获取)数据的网络程序(或类似设备)使用。

#2

And this: http://lists.opensuse.org/archive/opensuse/2003-12/msg02404.html

这个:http://lists.opensuse.org/archive/opensuse/2003-12/msg02404.html

#3

In the Linux devices.txt file in the kernel docs it says:

在内核文档中的Linux devices.txt文件中,它说:

3 char    Pseudo-TTY slaves
      0 = /dev/ttyp0    First PTY slave
      1 = /dev/ttyp1    Second PTY slave
        ...
    255 = /dev/ttyef    256th PTY slave

    These are the old-style (BSD) PTY devices; Unix98
    devices are on major 136 and above.

and goes on to say

接着说

4 char    TTY devices
      0 = /dev/tty0     Current virtual console

      1 = /dev/tty1     First virtual console
        ...
     63 = /dev/tty63    63rd virtual console
     64 = /dev/ttyS0    First UART serial port
        ...
    255 = /dev/ttyS191  192nd UART serial port

    UART serial ports refer to 8250/16450/16550 series devices.

    Older versions of the Linux kernel used this major
    number for BSD PTY devices.  As of Linux 2.1.115, this
    is no longer supported.  Use major numbers 2 and 3.

I don't know how much this helps you, but should get you started in the right direction.

我不知道这对你有多大帮助,但应该让你开始朝着正确的方向前进。

#1

see this

For a pseudo terminal pair such as ptyp3 and ttyp3, the pty... is the master or controlling terminal and the tty... is the slave. There are only 16 ttyp's: ttyp0-ttypf (f is a hexadecimal digit). To get more pairs, the 3 letters q, r, s may be used instead of p. For example the pair ttys8, ptys8 is a pseudo terminal pair. The master and slave are really the same "port" but the slave is used by the application program and the master is used by a network program (or the like) which supplies (and gets) data to/from the slave port.

对于伪终端对,例如ptyp3和ttyp3,pty ......是主终端或控制终端,而tty ...是从属终端。只有16个ttyp:ttyp0-ttypf(f是十六进制数字)。为了获得更多对,可以使用3个字母q,r,s代替p。例如,对ttys8,ptys8是伪终端对。主设备和从设备实际上是相同的“端口”,但是应用程序使用从设备,并且主设备由向从端口提供(和获取)数据的网络程序(或类似设备)使用。

#2