--- /dev/null
+;;;; popen.test --- exercise ice-9/popen.scm -*- scheme -*-
+;;;;
+;;;; Copyright 2003, 2006 Free Software Foundation, Inc.
+;;;;
+;;;; This library is free software; you can redistribute it and/or
+;;;; modify it under the terms of the GNU Lesser General Public
+;;;; License as published by the Free Software Foundation; either
+;;;; version 2.1 of the License, or (at your option) any later version.
+;;;;
+;;;; This library is distributed in the hope that it will be useful,
+;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+;;;; Lesser General Public License for more details.
+;;;;
+;;;; You should have received a copy of the GNU Lesser General Public
+;;;; License along with this library; if not, write to the Free Software
+;;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+
+(define-module (test-suite test-ice-9-popen)
+ #:use-module (test-suite lib)
+ #:use-module (ice-9 popen))
+
+
+;; read from PORT until eof is reached, return what's read as a string
+(define (read-string-to-eof port)
+ (do ((lst '() (cons c lst))
+ (c (read-char port) (read-char port)))
+ ((eof-object? c)
+ (list->string (reverse! lst)))))
+
+;; call (THUNK), with SIGPIPE set to SIG_IGN so that an EPIPE error is
+;; generated rather than a SIGPIPE signal
+(define (with-epipe thunk)
+ (dynamic-wind
+ (lambda ()
+ (sigaction SIGPIPE SIG_IGN))
+ thunk
+ restore-signals))
+
+
+;;
+;; open-input-pipe
+;;
+
+(with-test-prefix "open-input-pipe"
+
+ (pass-if-exception "no args" exception:wrong-num-args
+ (open-input-pipe))
+
+ (pass-if "port?"
+ (port? (open-input-pipe "echo hello")))
+
+ (pass-if "echo hello"
+ (string=? "hello\n" (read-string-to-eof (open-input-pipe "echo hello"))))
+
+ ;; exercise file descriptor setups when stdin is the same as stderr
+ (pass-if "stdin==stderr"
+ (let ((port (open-file "/dev/null" "r+")))
+ (with-input-from-port port
+ (lambda ()
+ (with-error-to-port port
+ (lambda ()
+ (open-input-pipe "echo hello"))))))
+ #t)
+
+ ;; exercise file descriptor setups when stdout is the same as stderr
+ (pass-if "stdout==stderr"
+ (let ((port (open-file "/dev/null" "r+")))
+ (with-output-to-port port
+ (lambda ()
+ (with-error-to-port port
+ (lambda ()
+ (open-input-pipe "echo hello"))))))
+ #t)
+
+ (pass-if "open-input-pipe process gets (current-input-port) as stdin"
+ (let* ((p2c (pipe))
+ (port (with-input-from-port (car p2c)
+ (lambda ()
+ (open-input-pipe "read line && echo $line")))))
+ (display "hello\n" (cdr p2c))
+ (force-output (cdr p2c))
+ (let ((result (eq? (read port) 'hello)))
+ (close-port (cdr p2c))
+ (close-pipe port)
+ result)))
+
+ ;; After the child closes stdout (which it indicates here by writing
+ ;; "closed" to stderr), the parent should see eof. In Guile 1.6.4
+ ;; and earlier a duplicate of stdout existed in the child, meaning
+ ;; eof was not seen.
+ ;;
+ ;; Note that the objective here is to test that the parent sees EOF
+ ;; while the child is still alive. (It is obvious that the parent
+ ;; must see EOF once the child has died.) The use of the `p2c'
+ ;; pipe, and `echo closed' and `read' in the child, allows us to be
+ ;; sure that we are testing what the parent sees at a point where
+ ;; the child has closed stdout but is still alive.
+ (pass-if "no duplicate"
+ (let* ((c2p (pipe))
+ (p2c (pipe))
+ (port (with-error-to-port (cdr c2p)
+ (lambda ()
+ (with-input-from-port (car p2c)
+ (lambda ()
+ (open-input-pipe
+ "exec 1>/dev/null; echo closed 1>&2; exec 2>/dev/null; read")))))))
+ (close-port (cdr c2p)) ;; write side
+ (let ((result (eof-object? (read-char port))))
+ (display "hello!\n" (cdr p2c))
+ (force-output (cdr p2c))
+ (close-pipe port)
+ result)))
+
+ )
+
+;;
+;; open-output-pipe
+;;
+
+(with-test-prefix "open-output-pipe"
+
+ (pass-if-exception "no args" exception:wrong-num-args
+ (open-output-pipe))
+
+ (pass-if "port?"
+ (port? (open-output-pipe "exit 0")))
+
+ ;; exercise file descriptor setups when stdin is the same as stderr
+ (pass-if "stdin==stderr"
+ (let ((port (open-file "/dev/null" "r+")))
+ (with-input-from-port port
+ (lambda ()
+ (with-error-to-port port
+ (lambda ()
+ (open-output-pipe "exit 0"))))))
+ #t)
+
+ ;; exercise file descriptor setups when stdout is the same as stderr
+ (pass-if "stdout==stderr"
+ (let ((port (open-file "/dev/null" "r+")))
+ (with-output-to-port port
+ (lambda ()
+ (with-error-to-port port
+ (lambda ()
+ (open-output-pipe "exit 0"))))))
+ #t)
+
+ ;; After the child closes stdin (which it indicates here by writing
+ ;; "closed" to stderr), the parent should see a broken pipe. We
+ ;; setup to see this as EPIPE (rather than SIGPIPE). In Guile 1.6.4
+ ;; and earlier a duplicate of stdin existed in the child, preventing
+ ;; the broken pipe occurring.
+ ;;
+ ;; Note that the objective here is to test that the parent sees a
+ ;; broken pipe while the child is still alive. (It is obvious that
+ ;; the parent will see a broken pipe once the child has died.) The
+ ;; use of the `c2p' pipe, and the repeated `echo closed' in the
+ ;; child, allows us to be sure that we are testing what the parent
+ ;; sees at a point where the child has closed stdin but is still
+ ;; alive.
+ ;;
+ ;; Note that `with-epipe' must apply only to the parent and not to
+ ;; the child process; we rely on the child getting SIGPIPE, to
+ ;; terminate it (and avoid leaving a zombie).
+ (pass-if "no duplicate"
+ (let* ((c2p (pipe))
+ (port (with-error-to-port (cdr c2p)
+ (lambda ()
+ (open-output-pipe
+ "exec 0</dev/null; while true; do echo closed 1>&2; done")))))
+ (close-port (cdr c2p)) ;; write side
+ (with-epipe
+ (lambda ()
+ (let ((result
+ (and (char? (read-char (car c2p))) ;; wait for child to do its thing
+ (catch 'system-error
+ (lambda ()
+ (write-char #\x port)
+ (force-output port)
+ #f)
+ (lambda (key name fmt args errno-list)
+ (= (car errno-list) EPIPE))))))
+ ;; Now close our reading end of the pipe. This should give
+ ;; the child a broken pipe and so allow it to exit.
+ (close-port (car c2p))
+ (close-pipe port)
+ result)))))
+
+ )
+
+;;
+;; close-pipe
+;;
+
+(with-test-prefix "close-pipe"
+
+ (pass-if-exception "no args" exception:wrong-num-args
+ (close-pipe))
+
+ (pass-if "exit 0"
+ (let ((st (close-pipe (open-output-pipe "exit 0"))))
+ (and (status:exit-val st)
+ (= 0 (status:exit-val st)))))
+
+ (pass-if "exit 1"
+ (let ((st (close-pipe (open-output-pipe "exit 1"))))
+ (and (status:exit-val st)
+ (= 1 (status:exit-val st))))))
+
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