Greetings! I've implemented a `-p` flag for grep, which disables a behaviour that the exit status is used (abused?) to signal whether any match occurred. In many cases, you won't notice this. Also, in many cases, shell scripts don't check for errors.
Now, for an example where it makes a difference. Consider a Bash script like this: # enable automatic error handling set -eo pipefail # check for string "issues" in a logfile cat logfile | grep issue | sort --unique If there are no issues in the logs, grep return exit code 1 and the shell interprets this as an error and exits itself. I've implemented that feature here, though it lacks tests yet: https://github.com/UlrichEckhardt/busybox/tree/grep-pipe-option Also, I'm currently trying to get the same feature into GNU grep as well, the long form `--pipe` is used there. I've also considered `--filter` (because it only filters) as alternative. I'm not fully happy with either one, maybe someone here comes up with a better suggestion. If you want, grab the first commit in there, it just fixes a small typo. I'd be happy to hear any suggestions! Cheers! Uli _______________________________________________ busybox mailing list [email protected] http://lists.busybox.net/mailman/listinfo/busybox
