# ps 1.9.3

* On Linux, process create times are now computed using
  `CLOCK_REALTIME - CLOCK_MONOTONIC` instead of `/proc/stat btime`, giving
  sub-second precision (previously, integer-second boot time caused up to 1s
  error). Handle validation accepts both the precise and the legacy boot time,
  so handles created by older versions of processx continue to work.
  For https://github.com/r-lib/processx/issues/394 and
  https://github.com/r-lib/processx/issues/402.

# ps 1.9.2

* New `ps_string()` for uniquely identifying a process (#208, @dansmith01).

# ps 1.9.1

* ps now builds correctly on Alpine Linux (3.19) on R 4.5.0.

# ps 1.9.0

* `ps_memory_full_info()` now contains `maxrss`, the maximum resident set
  size for the calling process.

* New `columns` argument in `ps()`, to customize what data is returned
  (#138).

# ps 1.8.1

* ps can now be installed again on unsupported platforms.

# ps 1.8.0

* New `ps_apps()` function to list all running applications on macOS.

* New function `ps_disk_io_counters()` to query disk I/O counters
  (#145, @michaelwalshe).

* New `ps_fs_info()` to query information about the file system of one
  or more files or directories.

* New `ps_wait()` to start an interruptible wait on multiple processes,
  with a timeout (#166).

* `ps_handle()` now allows a numeric (double) scalar as the pid, as long
  as its value is integer.

* `ps_send_signal()`, `ps_suspend()`, `ps_resume()`, `ps_terminate()`,
  `ps_kill()`, and `ps_interrupt()` can now operate on multiple processes,
  if passed a list of process handles.

* `ps_kill()` and `ps_kill_tree()` have a new `grace` argument.
  On Unix, if this argument is not zero, then `ps_kill()` first sends a
  `TERM` signal, and waits for the processes to quit gracefully, via
  `ps_wait()`. The processes that are still alive after the grace period
  are then killed with `SIGKILL`.

* `ps_status()` (and thus `ps()`) is now better at getting the correct
  status of processes on macOS. This usually requires calling the external
  `ps` tool. See `?ps_status()` on how to opt out from the new
  behavior (#31).

# ps 1.7.7

* `ps_cpu_times()` values are now correct on newer arm64 macOS.

# ps 1.7.6

* `ps_name()` now does not fail in the rare case when `ps_cmdline()` returns an empty vector (#150).

* `ps_system_cpu_times()` now returns CPU times divided by the HZ as reported by CLK_TCK, in-line with other OS's and the per-process version. (#144, @michaelwalshe).

# ps 1.7.5

No user visible changes.

# ps 1.7.4

* `ps::ps_get_cpu_affinity()` now works for other processes on Linux, not only
  the calling process.

# ps 1.7.3

* The output of `ps_disk_usage()`, `ps_disk_partitions()` and
  `ps_shared_lib_users()` now do not include a spurious `stringsAsFactors`
  column.

# ps 1.7.2

* `ps_system_memory()$percent` now returns a number scaled between 0 and 100
  on Windows, rather than between 0 and 1 (#131, @francisbarton).

# ps 1.7.1

* ps now returns data frames instead of tibbles. While data frames and
  tibbles are very similar, they are not completely compatible. To convert
  the output of ps to tibbles call the `tibble::as_tibble()` function
  on them.

* `ps()` now does not fail if both `user` and `after` are specified (#129).

# ps 1.7.0

* ps now compiles on platforms that enable OpenMP (#109).

* New functions `ps_get_cpu_affinity()` and `ps_set_cpu_affinity()` to query
  and set CPU affinity (#123).

* `ps_memory_info()` now does not mix up `rss` and `vms` on Linux.

* `ps_memory_info()` now reports memory in bytes instead of pages on Linux (#115)

# ps 1.6.0

* New function `ps_system_cpu_times()` to calculate system CPU times.

* New function `ps_loadavg()` to show the Unix style load average.

# ps 1.5.0

* New function `ps_shared_libs()` to list the loaded shared libraries
  of a process, on Windows.

* New function `ps_shared_lib_users()` to list all processes that
  loaded a certain shared library, on Windows.

* New function `ps_descent()` to query the ancestry of a process.

# ps 1.4.0

* ps is now under the MIT license.

* Process functions now default to the calling R process. So e.g. you can
  write simply `ps_connections()` to list all network connections of the
  current process, instead of `ps_connections(ps_handle())`.

* New `ps_get_nice()` and `ps_set_nice()` functions to get and set the
  priority of a process (#89).

* New `ps_system_memory()` and `ps_system_swap()` functions, to
  return information about system memory and swap usage.

* New `ps_disk_partitions()` and `ps_disk_usage()` functions, they
  return information about file systems, similarly to the `mount` and
  `df` Unix commands.

* New `ps_tty_size()` function to query the size of the terminal.

* Fixed an issue in `CleanupReporter()` that triggered random failures
  on macOS.

# ps 1.3.4

* `ps_cpu_count()` now reports the correct number on Windows, even if
  the package binary was built on a Windows version with a different
  API (#77).

# ps 1.3.3

* New function `errno()` returns a table of `errno.h` error codes and
  their description.

* ps now compiles again on Solaris.

# ps 1.3.2

* ps now compiles again on unsupported platforms like Solaris.

# ps 1.3.1

* Fixed an installation problem on some Windows versions, where the
  output of `cmd /c ver` looks different (#69).

# ps 1.3.0

* New `ps_cpu_count()` function returns the number of logical or
  physical processors.

# ps 1.2.1

* Fix a crash on Linux, that happened at load time (#50).

# ps 1.2.0

* 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).

# ps 1.1.0

* 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.

# ps 1.0.0

First released version.