NAME

       keyctl_set_timeout - set the expiration timer on a key

SYNOPSIS

       #include <keyutils.h>

       long keyctl_set_timeout(key_serial_t key, unsigned timeout);

DESCRIPTION

       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 to 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 specified 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              The specified key has been revoked.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.

SEE ALSO

       keyctl(1), add_key(2), keyctl(2), request_key(2), keyctl(3), keyrings(7), keyutils(7)