Talk:Redirection (computing)

Hoinkies

I don't see any evidence that this is common in computing. http://en.wikipedia.org/wiki/Talk:Bracket#Hoinkies Salvar (talk) 18:39, 23 March 2009 (UTC)

Test Program

You can test all kind of redirection with this little shell script:

 #!/bin/bash
 echo "This is stdout."
 echo "This is stderr." >&2

piping

Is piping redirection? DG12 (talk) 17:01, 14 November 2011 (UTC)

Yes it is. Output from the first program is no longer going to the terminal, and input from the second program no longer comes from the terminal. —EncMstr (talk) 17:14, 14 November 2011 (UTC)

Bad analogue, someone with good English skills should rewrite

In the article

command1 | command2

was said to be equal to

command1 > tempfile
command2 < tempfile
rm tempfile

which it isn't, since the commands are executed in different subshells when a pipe is used, which means that the commands is usually executed in parallel and there is usually no temporary files created (or swap space used), just a file handle and a (usually) tiny buffer. Piping usually use much less memory then creating a temporary file and is faster. I'm guessing this is an old DOSism (in early MS/PC DOS was the given analogue correct). I'm not good enough with English to provide a better explanation, so I have only changed the wording from the two examples being "equal" to being "similar". But the analogue is still bad and might confuse someone. — Preceding unsigned comment added by Se mj (talk • contribs) 23:10, 1 December 2011 (UTC)

Done. 92.231.92.54 (talk) 14:24, 9 February 2012 (UTC)

Speaking of redirection...

I/O redirection and IO redirection should both probably link to this article. 75.139.254.117 (talk) 22:19, 11 December 2016 (UTC)

Bad examples

The article talks about a non-POSIX version of a command is as follows:

command > file 2>&1

But then a few lines down uses the exact same syntax to describe how to write both stdout and stderr to a file. The correct syntax is already mentioned on the page as:

command &>file

(I accept that the example is trying to show what is wrong with the command below, but it feels like the examples need re-writing):

command 2>&1 > file

Also, there's no mention of &>> (append) — Preceding unsigned comment added by 81.102.16.137 (talk) 16:38, 18 August 2018 (UTC)

Title

There are lot of "redirects" inside any modern OS. Perhaps a move to "Input-output redirect" should be considered. Викидим (talk) 20:14, 25 April 2024 (UTC)