Re: Stable 2.0 and popen.test on Debian Squeeze

[<dsmich@roadrunner.com>]

---- Mark H Weaver <mhw@netris.org> wrote: 
> Andy Wingo <wingo@pobox.com> writes:
> > The difference seems to be the difference between:
> >
> >   dash -c 'exec 1>/dev/null; echo closed 1>&2; exec 2>/dev/null; read'
> >
> > and
> >
> >   bash -c 'exec 1>/dev/null; echo closed 1>&2; exec 2>/dev/null; read'
> >
> > Dash prints "closed" and exits immediately with error code 2.  Bash
> > prints "closed" and waits for input from the "read".
> >
> > Are we relying on non-portable shell behavior here?
> 
> In dash, "read" requires at least one argument: the name of the variable
> in which to put the string.  You don't see the error message because
> stderr has been redirected to /dev/null.  In bash, the REPLY variable is
> used by default.  So the "read" above ought to be changed to
> "read REPLY".

On my Debian Squeeze system:


dsmith@stumpy:~/src/guile$ ls -l /bin/sh
lrwxrwxrwx 1 root root 4 Mar  1 20:26 /bin/sh -> dash


dsmith@stumpy:~/src/guile$ git diff
diff --git a/test-suite/tests/popen.test b/test-suite/tests/popen.test
index 6300c3b..9604c9c 100644
--- a/test-suite/tests/popen.test
+++ b/test-suite/tests/popen.test
@@ -104,7 +104,7 @@
                     (with-input-from-port (car p2c)
                       (lambda ()
                         (open-input-pipe
-                         "exec 1>/dev/null; echo closed 1>&2; exec 2>/dev/null; read")))))))
+                         "exec 1>/dev/null; echo closed 1>&2; exec 2>/dev/null; read REPLY")))))))
       (close-port (cdr c2p))   ;; write side
       (let ((result (eof-object? (read-char port))))
        (display "hello!\n" (cdr p2c))



dsmith@stumpy:~/src/guile$ ./check-guile popen.test
Testing /home/dsmith/src/guile/meta/guile ... popen.test
with GUILE_LOAD_PATH=/home/dsmith/src/guile/test-suite
Running popen.test
FAIL: popen.test: open-output-pipe: no duplicate

Totals for this test run:
passes:                 14
failures:               1
unexpected passes:      0
expected failures:      0
unresolved test cases:  0
untested test cases:    0
unsupported test cases: 0
errors:                 0



-Dale