Take the 2-minute tour ×
Server Fault is a question and answer site for professional system and network administrators. It's 100% free, no registration required.

After search it seems the ascii of EOF is -1,but how can I echo it out?

My purpose of doing this is to test whether it behaves the same as pressing ctrl-d if I just echo out EOF.

share|improve this question

2 Answers 2

up vote 3 down vote accepted

There is no way to echo out an EOF. An EOF can only be generated either by reaching the end of a file or by invoking the keypress bound to the eof terminal setting (CtrlD by default) when the file being read is bound to the terminal.

share|improve this answer
    
isn't EOF defined as -1 in stdio.h? why can't echo it out if we know its ascii value? –  locale Jun 8 '11 at 9:13
    
So what. An int with the value of -1 (or 4294967295 if we consider the unsigned version) can't possibly be a character anyway since characters can only have a value from 0 to 255 inclusive. –  Ignacio Vazquez-Abrams Jun 8 '11 at 9:15
    
how do you know it's an int in the first place? –  locale Jun 8 '11 at 9:18
3  
Because I do things like look at the fgetc(3) man page. –  Ignacio Vazquez-Abrams Jun 8 '11 at 9:20

In bash you could write exec 1>&- in order to close the file descriptor known as stdout.

As Ignacio already said, EOF is not a character, so the question how to "echo EOF" doesn't make any sense in the first place. You can echo characters (bytes) or you can close a file descriptor, but you can never echo an EOF.

share|improve this answer

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.