bitbake: siggen: use correct umask when writing siginfo

We try to write sstate with group-write permissions so that sstate-cache
can be shared between multiple users.  However the siginfo files are
created in various tasks which may set their own umask (such as
do_populate_sysroot, 0022).  This results in no group write permission
on the intermediate directories, which is fatal when sharing a cache.

Fix this by wrapping the siginfo mkdir in a umask change to 0002.

(Bitbake rev: c0d60794a32e3f8bbfbbd6800d87ef2782aacf2c)

Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Steve Sakoman <steve@sakoman.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/bitbake/lib/bb/siggen.py b/bitbake/lib/bb/siggen.py
index 26fa7f05ce..9d4f67aa90 100644
--- a/bitbake/lib/bb/siggen.py
+++ b/bitbake/lib/bb/siggen.py
@@ -318,7 +318,8 @@ class SignatureGeneratorBasic(SignatureGenerator):
         else:
             sigfile = stampbase + "." + task + ".sigbasedata" + "." + self.basehash[tid]
 
-        bb.utils.mkdirhier(os.path.dirname(sigfile))
+        with bb.utils.umask(0o002):
+            bb.utils.mkdirhier(os.path.dirname(sigfile))
 
         data = {}
         data['task'] = task