keyctl_set_timeout()
sets the expiration timer on a key to
timeout
seconds into the future. Setting
timeout
to
zero
cancels the expiration, assuming the key hasn't already expired.
When the key expires, further attempts to access it will be met with error
EKEYEXPIRED.
The caller must have
setattr
permission on a key to be able change its permissions mask.
RETURN VALUE
On success
keyctl_set_timeout()
returns
0 .
On error, the value
-1
will be returned and errno will have been set to an appropriate error.
ERRORS
ENOKEY
The specied key does not exist.
EKEYEXPIRED
The specified key has already expired.
EKEYREVOKED
The specified key has been revoked.
EACCES
The named key exists, but does not grant
setattr
permission to the calling process.
LINKING
This is a library function that can be found in
libkeyutils.
When linking,
-lkeyutils
should be specified to the linker.
