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Diffstat (limited to 'test-suite/tests/popen.test')
-rw-r--r-- | test-suite/tests/popen.test | 213 |
1 files changed, 213 insertions, 0 deletions
diff --git a/test-suite/tests/popen.test b/test-suite/tests/popen.test new file mode 100644 index 000000000..2c0877484 --- /dev/null +++ b/test-suite/tests/popen.test @@ -0,0 +1,213 @@ +;;;; popen.test --- exercise ice-9/popen.scm -*- scheme -*- +;;;; +;;;; Copyright 2003, 2006, 2010, 2011, 2013, 2014 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)) + +;; 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)) + +(define-syntax-rule (if-supported body ...) + (begin body ...)) + +(if-supported + (use-modules (ice-9 popen)) + + + ;; + ;; 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 + (format #f "exec 1>~a; echo closed 1>&2; \ +exec 2>~a; read REPLY" + %null-device %null-device)))))))) + (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 + (string-append "exec guile --no-auto-compile -s \"" + (getenv "TEST_SUITE_DIR") + "/tests/popen-child.scm\"")))))) + (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))))))) |