[gentoo-portage-dev] [PATCH] econf: update config.{sub,guess} atomically to avoid races

[Mike Frysinger]

URL: https://bugs.gentoo.org/487478
---
 bin/phase-helpers.sh | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/bin/phase-helpers.sh b/bin/phase-helpers.sh
index ec48c94..59c053a 100644
--- a/bin/phase-helpers.sh
+++ b/bin/phase-helpers.sh
@@ -512,7 +512,9 @@ econf() {
                        -name config.guess -o -name config.sub ')' -print0 | \
                        while read -r -d $'\0' x ; do
                                __vecho " * econf: updating ${x/${WORKDIR}\/} 
with ${EPREFIX}/usr/share/gnuconfig/${x##*/}"
-                               cp -f 
"${EPREFIX}"/usr/share/gnuconfig/"${x##*/}" "${x}"
+                               # Make sure we do this atomically incase we're 
run in parallel. #487478
+                               cp -f 
"${EPREFIX}"/usr/share/gnuconfig/"${x##*/}" "${x}.$$"
+                               mv -f "${x}.$$" "${x}"
                        done
                fi
 
-- 
1.8.4.3