On 09/07/2010 02:09 PM, Bruno Haible wrote:
But 'awk' is among the list of portable programs. This should work:
if test `awk 'BEGIN { print ENVIRON["POSIXLY_CORRECT"] }'< /dev/null | wc
-c` = 1; then
: # POSIXLY_CORRECT is not exported
else
: # POSIXLY_CORRECT is exported
fi
Maybe the test whether the value of ENVIRON["POSIXLY_CORRECT"] is empty or
non-empty can be moved into the awk script. I'm not very familiar with awk
programming.
Like so:
gl_awk_probe='BEGIN { for (v in ENVIRON)
if (v == "POSIXLY_CORRECT") print "x" }'
case ${POSIXLY_CORRECT:+x}`awk "$gl_awk_probe" </dev/null` in
xx) gl_had_POSIXLY_CORRECT=exported ;;
x) gl_had_POSIXLY_CORRECT=yes ;;
*) gl_had_POSIXLY_CORRECT= ;;
esac
except that now we're stuck on the issue of finding a portable $AWK that
understands ENVIRON.
--
Eric Blake ebl...@redhat.com +1-801-349-2682
Libvirt virtualization library http://libvirt.org
