I'd like to have the stdout of a command replicated to stderr as well under bash. Something like:
$ echo "FooBar" (...)
FooBar
FooBar
$
where (...) is the redirection expression. Is that possible?
+2
A:
From the command line
script.sh >f.txt 2>&1
or, specific to your output
echo "FooBar" >f.txt 2>&1
KevinDTimm
2010-06-29 14:42:08
This is solving a different problem: merging stdout and stderr into a single output stream. What the question asks for is almost the reverse of this: taking the command's single stdout stream and replicating it to both stdout and stderr.
Gordon Davisson
2010-06-29 16:10:00
agreed - marco has the correct answer (I toyed with a tee implementation too, but re-reading the question steered me away from there)
KevinDTimm
2010-06-29 17:13:11
A:
For redirecting to stderr, I would use >&2 or >/dev/stderr. For replicating output, I would use tee. The drawback of it is that a temporary file is needed:
echo "FooBar" | tee /tmp/stdout >&2 ; cat /tmp/stdout
mouviciel
2010-06-29 15:10:42
+4
A:
Use tee with /dev/stderr:
echo "FooBar" | tee /dev/stderr
or use awk/perl/python to manually do the replication:
echo "FooBar" | awk '{print;print > "/dev/stderr"}'
echo "FooBar" | perl -pe "print STDERR, $_;"
marco
2010-06-29 15:26:17