#18401: maple command broken (on some computer)
-------------------------------------+-------------------------------------
Reporter: vdelecroix | Owner:
Type: defect | Status: needs_review
Priority: major | Milestone: sage-6.7
Component: interfaces | Resolution:
Keywords: | Merged in:
Authors: Vincent Delecroix | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
u/vdelecroix/18401 | 1c71a060202783324a3b5ce1d0e143aacc81a14e
Dependencies: | Stopgaps:
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Comment (by leif):
Yep, `expect.py` is to fix, not `maple.py`. (Otherwise a local `maple`
would no longer work.)
The problem when using ssh (or likewise, `sh -c ...`) is that the
parameters get interpreted twice; once by the local shell, and a second
time by the remote (or sub-) shell.
The local one removes the double quotes, passing literally `maple -t -c
interface(screenwidth=infinity,errorcursor=false)` to the remote shell,
which gives a syntax error since the parentheses are no longer quoted nor
escaped to avoid interpretation.
{{{
#!sh
sh -c 'maple -t -c interface(screenwidth=infinity,errorcursor=false)'
}}}
would give exactly the same error, while
{{{
#!sh
sh -c 'maple -t -c interface\(screenwidth=infinity,errorcursor=false\)'
}}}
would work.
(So it does ''not'' depend on the computer, unless the remote shell were
some strange non-standard one not treating the parentheses as special
characters...)
--
Ticket URL: <http://trac.sagemath.org/ticket/18401#comment:2>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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