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;;;; 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 3 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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