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authorPhil Blundell <philb@gnu.org>2011-11-14 13:06:51 +0000
committerRichard Purdie <richard.purdie@linuxfoundation.org>2011-11-15 12:20:56 +0000
commit689884653938b98899fb3ba791221fdbe2f40e7f (patch)
tree79ed59eae44e8a31ebbf8fa2fb1e8f0bcbed8831 /meta/recipes-connectivity
parente7090743df6b38e9ce73743b5bbdd8ab6e9cada4 (diff)
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libnss-mdns: avoid race condition in postinst
Writing to "/tmp/nsswitch.conf" leads to a race condition if two copies of the postinst are running simultaneously. Fix this by modifying /etc/nsswitch.conf in place using sed -i. Also make the same change to the prerm for consistency although the race will not occur here in practice. Signed-off-by: Phil Blundell <philb@gnu.org> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Diffstat (limited to 'meta/recipes-connectivity')
-rw-r--r--meta/recipes-connectivity/libnss-mdns/libnss-mdns_0.10.bb8
1 files changed, 3 insertions, 5 deletions
diff --git a/meta/recipes-connectivity/libnss-mdns/libnss-mdns_0.10.bb b/meta/recipes-connectivity/libnss-mdns/libnss-mdns_0.10.bb
index 5f614f86a..87707142d 100644
--- a/meta/recipes-connectivity/libnss-mdns/libnss-mdns_0.10.bb
+++ b/meta/recipes-connectivity/libnss-mdns/libnss-mdns_0.10.bb
@@ -7,7 +7,7 @@ LIC_FILES_CHKSUM = "file://LICENSE;md5=2d5025d4aa3495befef8f17206a5b0a1"
DEPENDS = "avahi"
RDEPENDS_${PN} = "avahi-daemon"
-PR = "r3"
+PR = "r4"
SRC_URI = "http://0pointer.de/lennart/projects/nss-mdns/nss-mdns-${PV}.tar.gz"
@@ -26,14 +26,12 @@ EXTRA_OECONF = "--libdir=${base_libdir} --disable-lynx --enable-avahi"
# TODO: pattern based configuration update
pkg_postinst_${PN} () {
cat $D/etc/nsswitch.conf | grep "hosts:\s*files dns$" > /dev/null && {
- cat $D/etc/nsswitch.conf | sed 's/hosts:\s*files dns/& mdns4/' > /tmp/nsswitch.conf
- mv /tmp/nsswitch.conf $D/etc/nsswitch.conf
+ sed -i 's/hosts:\s*files dns/& mdns4/' $D/etc/nsswitch.conf
}
}
pkg_prerm_${PN} () {
cat /etc/nsswitch.conf | grep "hosts:\s*files dns mdns4$" > /dev/null && {
- cat /etc/nsswitch.conf | sed 's/\(hosts:\s*files dns\) mdns4*/\1/' > /tmp/nsswitch.conf
- mv /tmp/nsswitch.conf /etc/nsswitch.conf
+ sed -i 's/\(hosts:\s*files dns\) mdns4*/\1/' /etc/nsswitch.conf
}
}