utils.py: default mode on mkdirhier

It turns out that bb.utils.mkdirhier() is occasionally called with widely varying umasks, including but not limited to 022, 002, or 0. This can result in unpredictable directory permissions, depending on which context you were in when a directory got made, and it can also result in mode 777 directories, which are Probably Bad. (The most obvious case involves packages-split being created by accident with umask 0 in populate_packages, shortly before a later attempt to create it with umask 022.)

I've done test builds with this modification, and nothing seemed to go wrong. I used an optional argument, rather than just hard-coding the 0755, because if I use an optional argument it will always be right, but if I don't I'm sure it will turn out to break something.

The following changes since commit d150226d11d5f041f78c8c3ce4abc5465dbc81d8:

fetch2/perforce: Ensure command has a default (2014-05-11 15:25:47 +0100)

are available in the git repository at:
git://git.yoctoproject.org/poky-contrib seebs/mkdirhier
http://git.yoctoproject.org/cgit.cgi/poky-contrib/log/?h=seebs/mkdirhier

Peter Seebach (1):
utils.py: default mode for mkdirhier

 lib/bb/utils.py |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

The default behavior of os.makedirs() is to create a directory with mode 777 & ~umask. When populating packages, oe-core uses a umask of 0, so that files and directories copied in from the source tree will have the right modes, and that's reasonable, but it can result in packages-split being created with mode 777, which is not so reasonable.

Since mkdirhier is used for build system stuff, it is pretty reasonable for it to assume that you don't want or need world-writeable directories, so we add a default mode, allowing a caller to override it if they really want to. Which they don't.

---
 lib/bb/utils.py |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

index 1be1874..cd16b3b 100644
@@ -618,13 +618,13 @@ def prune_suffix(var, suffixes, d):
             return var.replace(suffix, "")
     return var
 
-def mkdirhier(directory):
+def mkdirhier(directory, mode = 0755):
     """Create a directory like 'mkdir -p', but does not complain if
     directory already exists like os.makedirs
     """
 
     try:
-        os.makedirs(directory)
+        os.makedirs(directory, mode)
     except OSError as e:
         if e.errno != errno.EEXIST:
             raise e

1.7.1