Get system command output: Difference between revisions

Caution: I have sometimes seen some versions of linux refuse to execute subshells after a few hundred thousand shell commands (the exec system call fails). I've not found any satisfying documentation on why this happens, but I strongly suspect kernel memory fragmentation (the examples where this happened were also using a lot of memory to accumulate results and it happened much more frequently anon machines with little memory than on machines with more memory). Exiting J and starting a new process has cleared it up when it has happened. Anyways, I usually prefer to do that kindsubshell ofresult processingcapture before J starts, just to be safe.