What Is Control End? Software Calls Something

At the start of a line, no bytes are in the buffer, so the process is told there are zero bytes available, and this acts as an EOF indicator.

After this send all buffered bytes immediately operation is performed, no bytes are left in the buffer.

So, when Ctrl-D is pressed a second time, it is the same as the beginning of a line (no bytes are sent, and the process is given zero bytes), and it acts like an EOF.

You can learn more about the termios line discipline by using the command man termios.

When I am entering a string like hdjshj into the terminal, and enter the end of file, will getchar store the whole sting of the characters at once Or does it store the character as soon as it is entered into the terminal and stop storing it when the EOF is encountered.

What Is Control End? Software Calls Something

That software calls something like a read system call to get bytes.

Separately, there is software that operates the terminal window you see, and software that reads characters from the keyboard.

The terminal software receives characters from the keyboard (through additional layers of system software) and processes them.

When it sees a returnenter, it sends the buffered characters, and the returnenter, to the running process.

When characters are sent to the running process in this way, the read system call returns them to the caller.

When you call getchar, it pulls a character out of that buffer, if there is one there.

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For Mac What Is Control End?