Add sample notification program
This needs to be linked with -lkeyutils.
It is run like:
./watch_test
and watches "/" for mount changes and the current session keyring for key
changes:
# keyctl add user a a @s
1035096409
# keyctl unlink 1035096409 @s
# mount -t tmpfs none /mnt/nfsv3tcp/
# umount /mnt/nfsv3tcp
producing:
# ./watch_test
ptrs h=4 t=2 m=20003
NOTIFY[00000004-00000002] ty=0003 sy=0002 i=01000010
KEY 2ffc2e5d change=2[linked] aux=1035096409
ptrs h=6 t=4 m=20003
NOTIFY[00000006-00000004] ty=0003 sy=0003 i=01000010
KEY 2ffc2e5d change=3[unlinked] aux=1035096409
ptrs h=8 t=6 m=20003
NOTIFY[00000008-00000006] ty=0001 sy=0000 i=02000010
MOUNT 00000013 change=0[new_mount] aux=168
ptrs h=a t=8 m=20003
NOTIFY[0000000a-00000008] ty=0001 sy=0001 i=02000010
MOUNT 00000013 change=1[unmount] aux=168
Other events may be produced, such as with a failing disk:
ptrs h=5 t=2 m=6000004
NOTIFY[00000005-00000002] ty=0004 sy=0006 i=04000018
BLOCK 00800050 e=6[critical medium] s=5be8
This corresponds to:
print_req_error: critical medium error, dev sdf, sector 23528 flags 0
in dmesg.
Signed-off-by: David Howells <dhowells@redhat.com>
1 file changed
