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; Shellpool - Interface from Common Lisp to External Programs
; Copyright (C) 2014-2015 Kookamara LLC
;
; Contact:
;
; Kookamara LLC
; 11410 Windermere Meadows
; Austin, TX 78759, USA
; http://www.kookamara.com/
;
; License: (An MIT/X11-style license)
;
; Permission is hereby granted, free of charge, to any person obtaining a
; copy of this software and associated documentation files (the "Software"),
; to deal in the Software without restriction, including without limitation
; the rights to use, copy, modify, merge, publish, distribute, sublicense,
; and/or sell copies of the Software, and to permit persons to whom the
; Software is furnished to do so, subject to the following conditions:
;
; The above copyright notice and this permission notice shall be included in
; all copies or substantial portions of the Software.
;
; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
; IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
; FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
; AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
; LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
; FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
; DEALINGS IN THE SOFTWARE.
;
; Original author: Jared Davis <jared@kookamara.com>
; utils.lisp -- just some utility functions
(let ((sem (bt-sem:make-semaphore))
(lock (bt:make-lock))
(queue nil))
(defun msg (msg &rest args)
"Like format, but safe for printing messages from multiple threads."
(bt:with-lock-held (lock)
(push (cons msg args) queue))
(bt-sem:signal-semaphore sem))
(bt:make-thread
;; Start up a thread to process MSG calls.
(lambda ()
(loop do
(unless (bt-sem:wait-on-semaphore sem)
(error "Failed to get the print semaphore."))
(let ((pair nil))
(bt:with-lock-held (lock)
(setq pair (pop queue)))
(let ((msg (car pair))
(args (cdr pair)))
(eval `(format t ,msg . ,args))
(force-output)))))))
(msg "Test message.~%")
(sleep 0.2)
(defun ezrun (cmd)
"Run a program, ensure it exits with status 0 and prints nothing to stderr,
and return its stdout output as a string list."
(let* ((stdout nil)
(stderr nil)
(shellpool:*debug* nil)
(each-line (lambda (line type)
(case type
(:stdout (push line stdout))
(:stderr (push line stderr))
(otherwise (error "Bad type ~s for line ~s~%" type line)))))
(status (shellpool:run cmd :each-line each-line))
(stdout (nreverse stdout))
(stderr (nreverse stderr)))
(when stderr
(error "Error running ~s: Got lines on stderr: ~s" cmd stderr))
(when (not (equal status 0))
(error "Error running ~s: non-zero exit status ~s" cmd status))
stdout))
(defun list-processes ()
"Try to get a list of all processes that are currently running. Used in
interruption tests."
;; BOZO is this conditional needed?
#+freebsd
(ezrun "ps ax -o pid,gid,ppid,pgid,command")
#-freebsd
;; This works on at least: Linux, Windows with Cygwin, OpenBSD, Darwin
(ezrun "ps ax"))
(defun has-process (name)
"Check if a process is running."
(let ((all-processes (list-processes)))
(loop for entry in all-processes do
(when (shellpool::strpos name entry)
(format t "Has-process: found match for ~s: ~s~%" name entry)
(return-from has-process t)))
(format t "Has-process: no matches for ~s.~%" name)
nil))
(msg "Testing out has-process.~%")
(sleep 0.2)
;(setq shellpool:*debug* t)
(unless (has-process "bash")
(error "Doesn't seem like has-process is working right: no bash shells are running."))
(when (has-process "lollipops-dancing-on-my-elbows.exe")
(error "Doesn't seem like has-process is working right: unlikely process exists."))
(setq shellpool:*debug* nil)
(msg "Has-process seems ok.~%")
(sleep 0.2)
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