stdin?

Asked May 10 '23 at 10:11

Active May 11 '23 at 07:47

Viewed 45 times

is there a bash shorcut for /dev/stdout like there is "-" for /dev/stdin ?

One of the use cases is to get bash history without line numbers. There is simply no option for that in the history builtin. We can do 'history -w /dev/stdout'. But that's typing 11 characters (/dev/stdout) and I am looking to shorten it to 1 if possible.

edited May 11 '23 at 07:47

asked May 10 '23 at 10:11

Sergey Guzenkov

Usually it's `-`. – Gerald Schneider May 10 '23 at 10:14
Did you see [this answer](https://stackoverflow.com/a/43695212/212107)? – Gerald Schneider May 10 '23 at 10:20
do we only speak about a redirect? wasn't it similar like 2&1> /file? – djdomi May 10 '23 at 11:13
@GeraldSchneider, '-' is for stdin, not stdout. – Sergey Guzenkov May 10 '23 at 12:11
It's a [convention that is used for both](https://unix.stackexchange.com/a/16364/2823). It's not a "shortcut", it needs to be implemented by the application. – Gerald Schneider May 10 '23 at 12:12
@GeraldSchneider, in this case we are talking specifically about bash. AFAIK - is exclusively for stdin. Else can you give an example of it being used as stdout in bash? – Sergey Guzenkov May 10 '23 at 12:14
There is an example in the linked answers below. But that won't help you since you already tried it and it obviously isn't working. Did you check out the first solution I linked? – Gerald Schneider May 10 '23 at 12:17
@GeraldSchneider, you mean pipeline into cut? That's not as elegant as '-w /dev/stdout' that I used. Again, there is no problem, as it has been solved in the question '-w /dev/stdout'. The question is if there are shortcuts to /dev/stdout. And it looks like there aren't. – Sergey Guzenkov May 10 '23 at 12:18
No, I linked specifically to the answer by setting the `HISTTIMEFORMAT` environment variable. – Gerald Schneider May 10 '23 at 12:20
1

@djdomi, descriptors do not work with history builtin – Sergey Guzenkov May 10 '23 at 12:22
1

Let us [continue this discussion in chat](https://chat.stackexchange.com/rooms/145912/discussion-between-sergey-guzenkov-and-gerald-schneider). – Sergey Guzenkov May 10 '23 at 12:25
@GeraldSchneider do you mean that bash does not have any convention for /dev/stdin or /dev/stdout? Bash does not understand '-' at all. But some third party programs do use this convention. – Sergey Guzenkov May 10 '23 at 12:42

is there a shortcut for /dev/stdout like "-" is for /dev/stdin?

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