#9946: Parallel build of Singular 3-1-1-4-package fails in other cases
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Reporter: mpatel | Owner: tbd
Type: defect | Status: needs_review
Priority: blocker | Milestone: sage-4.6
Component: packages | Keywords:
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Comment(by leif):
Dave, if you don't want to mess around with {{{/dev/urandom}}} (and
{{{hd}}}?), you could use the pid of a subshell ({{{rand_raw=`sh -c 'echo
$$'`}}}) as the source for a pseudo random number (perhaps "recursively",
i.e. the pid of the nth subshell where n is itself a pseudo-random
number), and feed that to
{{{
#!sh
sleep `expr $base + $rand_raw % $modulus \* $scale`
}}}
Plain {{{rand_raw}}} is of course bad on an otherwise idle system, also
depending on how long you sleep.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/9946#comment:15>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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