ps_cpu_count() function returns the number of logical or physical processors.New ps_connections() to list network connections. The CleanupReporter() testthat reporter can check for leftover open network connections in test cases.
ps_open_files() does not include open sockets now on Linux, they are rather included in ps_connections().
CleanupReporter() now ignores /dev/urandom, some packages (curl, openssl, etc.) keep this file open.
Fix ps() printing without the tibble package (#43).
Fix compilation with ICC (#39).
Fix a crash on Linux (#47).
New ps_num_fds() returns the number of open files/handles.
New ps_open_files() lists all open files of a process.
New ps_interrupt() interrupts a process. It sends a SIGINT signal on POSIX systems, and it can send CTRL+C or CTRL+BREAK events on Windows.
New ps_users() lists users connected to the system.
New ps_mark_tree(), ps_find_tree(), ps_kill_tree(), with_process_cleanup(): functions to mark and clean up child processes.
New CleanupReporter, to be used with testthat: it checks for leftover child processes and open files in test_that() blocks.
First released version.