On Mon, Jul 12, 2010 at 08:56:55PM +0900, Charles Plessy wrote: > Le Mon, Jul 12, 2010 at 08:56:25AM +0100, Chris Jackson a écrit : > >> > >> I would like to send a patch Upstream, but have not found a drop-in replacement > >> for this command, apart from someghing ugly like: > >> > >> BAR=$FOO ; unset FOO ; FOO=$BAR ; unset BAR > >> > >> to replace ‘export -n FOO’. > > > * perhaps you can run the commands needing the exported variable > > in a subshell? (see under "Grouping Commands Together" in the > > man page). If you export anything in a subshell, it won't be > > reflected in the "main" shell, but beware, nor will any other > > shell builtin take effect. (Potentially also not pretty, and/or > > a lot of work rewriting) > > Thanks a lot for the suggestion! In my particular case, I think that it does > what is intended. I will replace the following line of the Perl script that > causes problem with dash: > > open (WOSSNAME, "export -n EMBOSS_ACDCOMMANDLINE;wossname -alpha -auto|") || die "Cannot run wossname"; > > by the following line: > > open (WOSSNAME, "(unset EMBOSS_ACDCOMMANDLINE; wossname -alpha -auto)|") || die "Cannot run wossname"; Erm... since you *are* executing this in a separate process, can't you just unset it even without running it in a subshell? > This wossname command just prints to stdout a list of available commands from > the EMBOSS software suite G'luck, Peter -- Peter Pentchev email@example.com firstname.lastname@example.org roam@FreeBSD.org PGP key: http://people.FreeBSD.org/~roam/roam.key.asc Key fingerprint FDBA FD79 C26F 3C51 C95E DF9E ED18 B68D 1619 4553 This sentence would be seven words long if it were six words shorter.
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