Gentoo Archives: gentoo-dev

From: Zac Medico <zmedico@g.o>
To: gentoo-dev@l.g.o
Subject: Re: [gentoo-dev] multiprocessing.eclass: doing parallel work in bash
Date: Sat, 02 Jun 2012 23:30:29
In Reply to: Re: [gentoo-dev] multiprocessing.eclass: doing parallel work in bash by Mike Frysinger
On 06/02/2012 02:12 PM, Mike Frysinger wrote:
> On Saturday 02 June 2012 16:39:16 Zac Medico wrote: >> On 06/02/2012 12:54 PM, Mike Frysinger wrote: >>> if [[ ! -L /dev/fd/${fd} ]] ; then >>> eval "exec ${fd}${redir}'${file}'" && break >>> fi >> >> I launched up a GhostBSD livedvd to see what /dev/fd/ looks like on >> FreeBSD, and it seems to contain plain character devices instead of >> symlinks to character devices: > > i didn't want to use [ -e ] because of broken links, but it seems that Linux > has diff semantics with /proc and broken symlinks. `test -e` will return true. > -mike
How about if we just create a fallback mode for older bash, where no pipes are involved, and multijob_post_fork just uses `wait` to check status and effectively causes only one job to execute at a time? -- Thanks, Zac