Re: printf -u "$fd"?

[Chet Ramey]

On 5/17/24 10:53 PM, Zachary Santer wrote:

> So here's another tangent, but has it been considered to add an option
> to the printf builtin to print to a given file descriptor, rather than
> stdout? If printing to a number of different file descriptors in
> succession, such an option would appear to have all the same benefits
> as read's -u option.

It doesn't actually save anything; it's just syntactic sugar. Since
`printf' uses stdio internally (as opposed to `read', which uses the
supplied file descriptor directly), you're still going to have to dup2
it internally somewhere. dprintf could do some of the work here, and bash
has a replacement for systems where it's missing, but that's more than I
want to change before bash-5.3 comes out. Maybe after that.

--
``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU    chet@case.edu    http://tiswww.cwru.edu/~chet/

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