Require that users and groups found in /vendor/etc/{passwd,group}
start with vendor_. This is needed to compliance with Treble as
without this prefix, it is possible for a new system image to create a
user/group name that a vendor has already used, causing a collision.
Bug: 79528966
Test: new unit test
Change-Id: I07500641e165f41526a8101592d83fa174e7a711
Having any destructor with a global variable in bionic is causing
some issues. Since we don't actually need to munmap in this case, we
remove the destructor to work around that issue.
A small class is used to still munmap during tests.
Bug: 73485611
Test: bionic unit tests
Change-Id: Ibcd45e9b1ab22d187ecfc2738bb87244250d81ea
Add the capability to read /etc/passwd and /etc/group for getpw* and
getgr* functions.
Bug: 27999086
Test: pwd, grp, grp_pwd_file unit tests
Test: Read in custom users/groups from /etc/{passwd,group}
Change-Id: Idc1f054af8a7ca34743a90493495f0ccc775a0d8
