sbuild: Add reentrant passwd and group wrappers

In order to make the library thread-safe, use the reentrant
getpw*_r and getgr*_r functions in place of the older unsafe
functions which use static buffers.  The passwd and group
structures are inherited by C++ classes of the same name which
allow handling of dynamic memory allocation while at the same
time allowing use of RAII and passing to C functions.

1 files changed, 0 insertions, 4 deletions

diff --git a/TODO b/TODO
index 6cde7d0b..316a25e1 100644
--- a/TODO
+++ b/TODO
@@ -28,10 +28,6 @@ and test for particular permissions.
 POTENTIAL
 ---------
 
-* Use of passwd/group databases should be thread-safe
-
-  - Use the _r variants of getpw*, getgr*.
-
 * Add tests for
 
 ** Auth