Re: is there a way to save stdout and stderr to two bash variables?

[Peng Yu]

> You have to turn that memory into a file descriptor. There are a few ways
> to do that: a temp file, a pipe, and mmap-style file mapping (which
> requires a file and file descriptor anyway). The devel branch uses pipes
> if the here document or here string is smaller than the pipe size,

So on Linux, if a string is less than 65,536 byte, pipe is used
instead of a tempfile?

http://man7.org/linux/man-pages/man7/pipe.7.html

Since Linux
       2.6.11, the pipe capacity is 16 pages (i.e., 65,536 bytes in a system
       with a page size of 4096 bytes).

> and
> a temp file otherwise.

Is the tempfile location affected by environment variables like TMPDIR?

-- 
Regards,
Peng