test-suite/tests/popen.test

   1 ;;;; popen.test --- exercise ice-9/popen.scm      -*- scheme -*-
   2 ;;;;
   3 ;;;; Copyright 2003, 2006 Free Software Foundation, Inc.
   4 ;;;;
   5 ;;;; This library is free software; you can redistribute it and/or
   6 ;;;; modify it under the terms of the GNU Lesser General Public
   7 ;;;; License as published by the Free Software Foundation; either
   8 ;;;; version 2.1 of the License, or (at your option) any later version.
   9 ;;;;
  10 ;;;; This library is distributed in the hope that it will be useful,
  11 ;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 ;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13 ;;;; Lesser General Public License for more details.
  14 ;;;;
  15 ;;;; You should have received a copy of the GNU Lesser General Public
  16 ;;;; License along with this library; if not, write to the Free Software
  17 ;;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  18
  19 (define-module (test-suite test-ice-9-popen)
  20   #:use-module (test-suite lib)
  21   #:use-module (ice-9 popen))
  22
  23
  24 ;; read from PORT until eof is reached, return what's read as a string
  25 (define (read-string-to-eof port)
  26   (do ((lst '() (cons c lst))
  27        (c (read-char port) (read-char port)))
  28       ((eof-object? c)
  29        (list->string (reverse! lst)))))
  30
  31 ;; call (THUNK), with SIGPIPE set to SIG_IGN so that an EPIPE error is
  32 ;; generated rather than a SIGPIPE signal
  33 (define (with-epipe thunk)
  34   (dynamic-wind
  35       (lambda ()
  36         (sigaction SIGPIPE SIG_IGN))
  37       thunk
  38       restore-signals))
  39
  40
  41 ;;
  42 ;; open-input-pipe
  43 ;;
  44
  45 (with-test-prefix "open-input-pipe"
  46
  47   (pass-if-exception "no args" exception:wrong-num-args
  48     (open-input-pipe))
  49
  50   (pass-if "port?"
  51     (port? (open-input-pipe "echo hello")))
  52
  53   (pass-if "echo hello"
  54     (string=? "hello\n" (read-string-to-eof (open-input-pipe "echo hello"))))
  55
  56   ;; exercise file descriptor setups when stdin is the same as stderr
  57   (pass-if "stdin==stderr"
  58     (let ((port (open-file "/dev/null" "r+")))
  59       (with-input-from-port port
  60         (lambda ()
  61           (with-error-to-port port
  62             (lambda ()
  63               (open-input-pipe "echo hello"))))))
  64     #t)
  65
  66   ;; exercise file descriptor setups when stdout is the same as stderr
  67   (pass-if "stdout==stderr"
  68     (let ((port (open-file "/dev/null" "r+")))
  69       (with-output-to-port port
  70         (lambda ()
  71           (with-error-to-port port
  72             (lambda ()
  73               (open-input-pipe "echo hello"))))))
  74     #t)
  75
  76   ;; After the child closes stdout (which it indicates here by writing
  77   ;; "closed" to stderr), the parent should see eof.  In Guile 1.6.4 and
  78   ;; earlier a duplicate of stdout existed in the child, meaning eof was not
  79   ;; seen.
  80   (pass-if "no duplicate"
  81     (let* ((pair (pipe))
  82            (port (with-error-to-port (cdr pair)
  83                    (lambda ()
  84                      (open-input-pipe
  85                       "exec 1>/dev/null; echo closed 1>&2; sleep 999")))))
  86       (read-char (car pair)) ;; wait for child to do its thing
  87       (and (char-ready? port)
  88            (eof-object? (read-char port))))))
  89
  90 ;;
  91 ;; open-output-pipe
  92 ;;
  93
  94 (with-test-prefix "open-output-pipe"
  95
  96   (pass-if-exception "no args" exception:wrong-num-args
  97     (open-output-pipe))
  98
  99   (pass-if "port?"
 100     (port? (open-output-pipe "exit 0")))
 101
 102   ;; exercise file descriptor setups when stdin is the same as stderr
 103   (pass-if "stdin==stderr"
 104     (let ((port (open-file "/dev/null" "r+")))
 105       (with-input-from-port port
 106         (lambda ()
 107           (with-error-to-port port
 108             (lambda ()
 109               (open-output-pipe "exit 0"))))))
 110     #t)
 111
 112   ;; exercise file descriptor setups when stdout is the same as stderr
 113   (pass-if "stdout==stderr"
 114     (let ((port (open-file "/dev/null" "r+")))
 115       (with-output-to-port port
 116         (lambda ()
 117           (with-error-to-port port
 118             (lambda ()
 119               (open-output-pipe "exit 0"))))))
 120     #t)
 121
 122   ;; After the child closes stdin (which it indicates here by writing
 123   ;; "closed" to stderr), the parent should see a broken pipe.  We setup to
 124   ;; see this as EPIPE (rather than SIGPIPE).  In Guile 1.6.4 and earlier a
 125   ;; duplicate of stdin existed in the child, preventing the broken pipe
 126   ;; occurring.
 127   (pass-if "no duplicate"
 128     (with-epipe
 129      (lambda ()
 130        (let* ((pair (pipe))
 131               (port (with-error-to-port (cdr pair)
 132                       (lambda ()
 133                         (open-output-pipe
 134                          "exec 0</dev/null; echo closed 1>&2; sleep 999")))))
 135          (read-char (car pair)) ;; wait for child to do its thing
 136          (catch 'system-error
 137                 (lambda ()
 138                   (write-char #\x port)
 139                   (force-output port)
 140                   #f)
 141                 (lambda (key name fmt args errno-list)
 142                   (= (car errno-list) EPIPE))))))))
 143
 144 ;;
 145 ;; close-pipe
 146 ;;
 147
 148 (with-test-prefix "close-pipe"
 149
 150   (pass-if-exception "no args" exception:wrong-num-args
 151     (close-pipe))
 152
 153   (pass-if "exit 0"
 154     (let ((st (close-pipe (open-output-pipe "exit 0"))))
 155       (and (status:exit-val st)
 156            (= 0 (status:exit-val st)))))
 157
 158   (pass-if "exit 1"
 159     (let ((st (close-pipe (open-output-pipe "exit 1"))))
 160       (and (status:exit-val st)
 161            (= 1 (status:exit-val st))))))
 162