On Thu, Nov 12, 2009 at 04:17:08PM +0100, Bernd Petrovitsch wrote: >On Thu, 2009-11-12 at 15:54 +0100, Bernhard Reutner-Fischer wrote: >> On Thu, Nov 12, 2009 at 03:09:12PM +0100, Bernd Petrovitsch wrote: >> >On Thu, 2009-11-12 at 16:57 +0300, Vladimir Dronnikov wrote: >> >> > >> >> > Using export -n or unset? >> >> > >> >> >> >> I need command to effectively perform clearenv(), to unset all vars at >> >> once ( that's why I tried "env -" :). Is there such in the nature? >> >No, no one really wants to delete/unexport *all* environment variables >> >as that includes $HOME and $PATH (to name 2 that come immediately to my >> >mind). >> >FWIW >> >---- snip ---- >> >unset $(env | sed -e 's/=.*//') >> >---- snip ---- >> >does the trick (in a bash). Similar should be doable for other shells. >> >> env | cut -d'=' -f1 | while read i;do unset $i;done >In my world, the "cut" and "while" are in sub-processes of the original
right, my bad. >shell (which is the reason for the "$(..)" construct. Backquote should >do the trick too BTW). So more like >---- snip ---- >for v in `export | while read i; do IFS="= " set -- $i; echo "$1"; done`; do >unset "$v"; done >---- snip ---- `env | cut -d'=' -f1 | while read i;do echo unset $i;done` I'm unsure which one is uglier ;) cheers, _______________________________________________ busybox mailing list [email protected] http://lists.busybox.net/mailman/listinfo/busybox
