we can't use java for this, because pre-U-QPR2 does not include:
https://android-review.googlesource.com/c/platform/system/sepolicy/+/2821590
system_server dontaudit key_socket getopt
so we'll spew lots of:
11-08 07:52:43.776 1469 1469 I auditd : type=1400 audit(0.0:4): avc: denied { getopt } for comm="system_server" scontext=u:r:system_server:s0 tcontext=u:r:system_server:s0 tclass=key_socket permissive=0
11-08 07:52:44.360 1469 1469 I auditd : type=1400 audit(0.0:5): avc: denied { getopt } for comm="NetworkStats" scontext=u:r:system_server:s0 tcontext=u:r:system_server:s0 tclass=key_socket permissive=0
11-08 07:52:44.508 1469 1469 I auditd : type=1400 audit(0.0:7): avc: denied { getopt } for comm="android.bg" scontext=u:r:system_server:s0 tcontext=u:r:system_server:s0 tclass=key_socket permissive=0
and the like.
This is due to Java's Os.close() in:
libcore/luni/src/main/java/libcore/io/BlockGuardOs.java;l=100
calling:
if (fd.isSocket$()) if (isLingerSocket(fd)) ...
Test: TreeHugger
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: Ib87fa5e8f0dfd9fbbccb25fb58a9fa78d6a07111
c350db788a