Print to STDERR in AWK

[Kenneth Brun Nielsen]

I have a file, that is parsed through AWK. I would like a few run-time
comments to be printed to STDOUT while processing within AWK.

How can I do that?

/Kenneth

[Stephane CHAZELAS]

2008-05-30, 03:48(-07), Kenneth Brun Nielsen:

> I have a file, that is parsed through AWK. I would like a few run-time

> comments to be printed to STDERR while processing within AWK.
[...]

On systems that have /dev/stderr or where awk fakes /dev/stderr,
you can do:

print "foo" > "/dev/stderr"

Otherwise, you can do:

system("echo foo >&2")

or

print "foo" | "cat >&2"

--
Stéphane

[pk]

To STDOUT or STDERR?

With GNU awk (and probably others), to print to stdout, just redirect
to /dev/stdout. To print to stderr, redirect to /dev/stderr.

man awk

--
All the commands are tested with bash and GNU tools, so they may use
nonstandard features. I try to mention when something is nonstandard (if
I'm aware of that), but I may miss something. Corrections are welcome.

[Kenneth Brun Nielsen]

On May 30, 12:52 pm, Stephane CHAZELAS <stephane_chaze...@yahoo.fr>
wrote:
> 2008-05-30, 03:48(-07)

> I have a file, that is parsed through AWK. I would like a few run-time
> > comments to be printed to STDERR while processing within AWK.
>
> [...]
>
> On systems that have /dev/stderr or where awk fakes /dev/stderr,
> you can do:
>
> print "foo" > "/dev/stderr"

Thanks. Both of you.

/Kenneth