procgroup

Overview ¶

Package procgroup puts a child process in its own process group so a context cancellation kills the WHOLE group — not just the direct child. A shell command can spawn grandchildren (e.g. `sh -c "sleep 5"` or a backgrounded `make` with compiler children); killing only the shell orphans them, and a grandchild holding the stdout/stderr pipes makes (*exec.Cmd).Wait block until it exits — defeating the caller's timeout/cancel. Configure(cmd) installs Setpgid plus a Cancel that signals the negative PID, delivering SIGKILL to every process in the group so the pipes close promptly and Run honours its deadline. Shared by the hook runner (hookexec) and the Bash command runner (osfs).