This week I learned 03

More shell I/O redirection

strace -o >(cmd). I’m still wrapping my head around how this works, but it’s really cool!

My understanding is that >(cmd) will call pipe(2) connecting its stdin to stdout of strace(1).

Writing something like strace -o >(grep foo) cmd, will filter the output of strace(1) through grep, dumping filtered output to stdout.

You can emulate this behavior by redirecting stderr to stdout and piping it to grep:

strace cmd 2>&1 | grep foo

As far as I can tell, this accomplishes the same thing as >(grep foo).