2011年12月15日 · TTY /dev/tty is a special file, representing the terminal for the current process. So, when you echo 1 > /dev/tty, your message ('1') will appear on your screen. Likewise, when you cat /dev/tty, your subsequent input gets duplicated (until you press Ctrl-C).

2017年4月27日 · /dev/tty is the controlling tty for any process. This may be your shell. If your process does not have a controlling tty, /dev/tty is not available, this e.g. is true for daemons. If your process has a controlling tty, then /dev/tty is a driver alias to the real tty driver your process is using for stdin, stdout or stderr.

2023年7月25日 · /dev/tty[0-N] (N is the highest attributed TTY number, e.g. 63) is one of the virtual consoles you switch to with control-alt-F1 and so on; /dev/tty0 is also by default virtual console; /dev/tty is kind of an alias to the console (physical, virtual or pseudo device, if any) associated to the process that open it. Unlike the other devices, you ...

2010年12月13日 · Linux mounts a special file system devpts on /dev (the 's' presumably standing for serial) that creates a corresponding entry in /dev/pts for every new terminal window you open, e.g. /dev/pts/0. macOS/FreeBSD also use the /dev file structure however, they use a numbered TTY naming convention ttys for every new terminal window you open e.g. /dev ...

2008年8月22日 · 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. 4 char TTY devices 0 = /dev/tty0 Current virtual console 1 = /dev/tty1 First virtual console ...

2018年5月26日 · Historically, the name of the controlling terminal in most versions of the UNIX System has been /dev/tty. POSIX.1 provides a runtime function that we can call to determine the name of the controlling terminal. #include <stdio.h> char *ctermid(char *ptr); $ ls -la /dev/tty crw-rw-rw- 1 root tty 5, 0 May 26 00:16 /dev/tty

2012年1月25日 · If you start your shell (bash) by following command all the STDOUT/STDERR will be rerouted/copied to another shell (/dev/tty2 in this case). bash 2>&1 | tee /dev/tty2 So, someone sitting in /dev/tty2 will see all of your activity. If someone logins shell is /bin/bash 2>&1 | tee /dev/tty2 instead of /bin/bash It'll happen every time he logs in ...

I have a question regarding the ports in Linux. If I connect my device via USB and want to check its port I can't do it using the command lsusb, which only specifies bus number and device number on...

2017年9月22日 · A tty is a device corresponding to a terminal (input = keyboard, output = display made of characters, not pixels). A pty is a pseudo-terminal; it acts as a terminal without being an actual one (typical example: a graphic terminal like xterm or gnome-terminal). –

2018年11月30日 · /dev/tty{1..63} and /dev/pts/n are device files representing devices themselves (although they are emulations), not in relation to process or kernel. /dev/tty0 reprsents the one in /dev/tty{1..63} which is currently used by something (maybe kernel or shell process?). /dev/tty represents the controlling terminal currently used by a process session.