Re: Use of |&

[goncholden]

------- Original Message -------
On Tuesday, February 14th, 2023 at 4:19 AM, Dennis Williamson 
<dennistwilliamson@gmail.com> wrote:


> On Mon, Feb 13, 2023 at 9:22 AM goncholden via help-bash@gnu.org wrote:
> 
> > Have been using awk in a bash script.
> > 
> > Have seen the use of "|&" rather than the usual "|". What is the reason
> > for using
> > 
> > "|&" exactly ?
> > 
> > command |& getline info
> > 
> > command | getline info
> 
> 
> 
> 
> As Greg has said, in Bash |& is a pipe that passes both stdout and stderr.
> 
> However, the examples you show are AWK syntax (specifically gawk, perhaps)
> for the creation of a coprocess as Alex has said. In this case it has
> nothing to do with Bash.

Ok.  Thusly |& is a specific gawk command rather than a pipe invocation in bash.