[libvirt] [PATCH 0/4] uid_t|gid_t fixes for 32 bit Linux

[Philipp Hahn]

Hello,

on 2012-11-23 I already reported a problem with running libvirt on 32 Bit
Linuxes (libvirt 0.9.12 on Debian Squeeze in my case) on this ML:
  [BUG] storage.xml: owner|group=-1 → 2^32-1 on 32 Bit

Due to multiple castings the initial -1 gets casted to (unsigned
int)4294967295, which failes to be cased to an (signed int) on read-back.
Thus the default storage pool is not launched:
	2013-02-22 16:50:10.182+0000: 28550: info : libvirt version: 0.9.12
	2013-02-22 16:50:10.182+0000: 28550: error : virStorageDefParsePerms:635 : XML error: malformed owner element

This is caused by uid_t and gid_t being opaque types: their exact type ranges
from s32 to u32 to u64. (Solaris until 2007, Linux, Windows64)

The following patch series fixes several issues, which I found while
investigating the storage pool startup problem:
 - mismatch between printf format and types
 - implicit casts of -1 to uid_t and gid_t
 - missing casts of uid_t and gid_t for printing
 - virXPathLong() failing on +(2^32-1)

@Guido: for Debian only the 4th patch is relevant, which applies with some
re-indention.

Additional issues:
 - UID and GID 4294967295 happens to be the same as -1, so hopefully nobody
   uses it. Should this be documented somewhere?
 - Some regression test?

Philipp Hahn (4):
  util: Fix printf format for uid_t|gid_t
  storage: Cast uid_t|gid_t to unsigned int
  storage: cast -1 for uid_t|gid_t
  storage: fix uid_t|gid_t handling on 32 bit Linux

 src/conf/storage_conf.c       |   82 ++++++++++++++++++++++++++++++++---------
 src/storage/storage_backend.c |   22 ++++++-----
 src/util/virutil.c            |   10 ++---
 3 files changed, 81 insertions(+), 33 deletions(-)

-- 
1.7.10.4