tests/run-program.impure.lisp

   1 ;;;; various RUN-PROGRAM tests with side effects
   2
   3 ;;;; This software is part of the SBCL system. See the README file for
   4 ;;;; more information.
   5 ;;;;
   6 ;;;; While most of SBCL is derived from the CMU CL system, the test
   7 ;;;; files (like this one) were written from scratch after the fork
   8 ;;;; from CMU CL.
   9 ;;;;
  10 ;;;; This software is in the public domain and is provided with
  11 ;;;; absolutely no warranty. See the COPYING and CREDITS files for
  12 ;;;; more information.
  13
  14 (cl:in-package :cl-user)
  15
  16 ;; In addition to definitions lower down the impurity we're avoiding
  17 ;; is the sigchld handler that RUN-PROGRAM sets up, which interfers
  18 ;; with the manual unix process control done by the test framework
  19 ;; (sometimes the handler will manage to WAIT3 a process before
  20 ;; run-tests WAITPIDs it).
  21
  22 (with-test (:name :run-program-cat-1)
  23   (let* ((process (sb-ext:run-program "/bin/cat" '() :wait nil
  24                                       :output :stream :input :stream))
  25          (out (process-input process))
  26          (in (process-output process)))
  27     (unwind-protect
  28          (loop for i from 0 to 255 do
  29               (write-byte i out)
  30               (force-output out)
  31               (assert (= (read-byte in) i)))
  32       (process-close process))))
  33
  34 ;;; Test driving an external program (cat) through pipes wrapped in
  35 ;;; composite streams.
  36
  37 (require :sb-posix)
  38
  39 (defun make-pipe ()
  40   (multiple-value-bind (in out) (sb-posix:pipe)
  41     (let ((input (sb-sys:make-fd-stream in
  42                                         :input t
  43                                         :external-format :ascii
  44                                         :buffering :none :name "in"))
  45           (output (sb-sys:make-fd-stream out
  46                                          :output t
  47                                          :external-format :ascii
  48                                          :buffering :none :name "out")))
  49       (make-two-way-stream input output))))
  50
  51 (defparameter *cat-in-pipe* (make-pipe))
  52 (defparameter *cat-in* (make-synonym-stream '*cat-in-pipe*))
  53 (defparameter *cat-out-pipe* (make-pipe))
  54 (defparameter *cat-out* (make-synonym-stream '*cat-out-pipe*))
  55
  56 (with-test (:name :run-program-cat-2)
  57   (let ((cat (run-program "/bin/cat" nil :input *cat-in* :output *cat-out*
  58                           :wait nil)))
  59     (dolist (test '("This is a test!"
  60                     "This is another test!"
  61                     "This is the last test...."))
  62       (write-line test *cat-in*)
  63       (assert (equal test (read-line *cat-out*))))
  64     (process-close cat)))
  65
  66 ;;; The above test used to use ed, but there were buffering issues: on some platforms
  67 ;;; buffering of stdin and stdout depends on their TTYness, and ed isn't sufficiently
  68 ;;; agressive about flushing them. So, here's another test using :PTY.
  69
  70 (defparameter *tmpfile* "run-program-ed-test.tmp")
  71
  72 (with-open-file (f *tmpfile*
  73                    :direction :output
  74                    :if-exists :supersede)
  75   (write-line "bar" f))
  76
  77 (defparameter *ed*
  78   (run-program "/bin/ed" (list *tmpfile*) :wait nil :pty t))
  79
  80 (defparameter *ed-pipe* (make-two-way-stream (process-pty *ed*) (process-pty *ed*)))
  81 (defparameter *ed-in* (make-synonym-stream '*ed-pipe*))
  82 (defparameter *ed-out* (make-synonym-stream '*ed-pipe*))
  83
  84 (defun read-linish (stream)
  85   (with-output-to-string (s)
  86     (loop for c = (read-char stream)
  87        while (and c (not (eq #\newline c)) (not (eq #\return c)))
  88        do (write-char c s))))
  89
  90 (defun assert-ed (command response)
  91   (when command
  92     (write-line command *ed-in*)
  93     (force-output *ed-in*))
  94   (let ((got (read-linish *ed-out*)))
  95     (unless (equal response got)
  96       (error "wanted ~S from ed, got ~S" response got)))
  97   *ed*)
  98
  99 (unwind-protect
 100      (with-test (:name :run-program-ed)
 101        (assert-ed nil "4")
 102        (assert-ed ".s/bar/baz/g" "")
 103        (assert-ed "w" "4")
 104        (assert-ed "q" "")
 105        (process-wait *ed*)
 106        (with-open-file (f *tmpfile*)
 107          (assert (equal "baz" (read-line f)))))
 108   (delete-file *tmpfile*))