#10339: Simplify spkg/pipestatus
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Reporter: jdemeyer | Owner: GeorgSWeber
Type: defect | Status: new
Priority: major | Milestone: sage-4.6.1
Component: build | Keywords: pipestatus Makefile
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Comment(by leif):
Replying to [ticket:10339 jdemeyer]:
> In my opinion, there should be only one alternative. If we have
something which works for old versions, why not use that for new versions
also?
Because it is completely inefficient; I would even use `set -o pipefail`
in `bash` >= 3.0 directly, and not call scripts.
IMHO Bash 3.0 is old enough to make it a prerequisite anyway.
> In any case, it would be good to think of a more robust implementation
of pipestatus. I can think of the following:
> 1. Write a simple C program using pipe(), fork(), exec(), wait().
> 2. Use the `mkfifo` command.
> 3. Use a temporary file:
{{{
EXITSTATUS=/tmp/pipestatus$$ # Obviously, we should use TMPDIR if set
( A; echo $? >$EXITSTATUS ) | B
}}}
Back to MS-DOS? ;-)
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10339#comment:1>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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