debian man page for keyctl_set_timeout

KEYCTL_SET_TIMEOUT(3)                                       Linux Key Management Calls                                       KEYCTL_SET_TIMEOUT(3)

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 expira-
       tion, 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              The specified key has been revoked.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.

SEE ALSO
       keyctl(1),
       add_key(2),
       keyctl(2),
       request_key(2),
       keyctl_get_keyring_ID(3),
       keyctl_join_session_keyring(3),
       keyctl_update(3),
       keyctl_revoke(3),
       keyctl_chown(3),
       keyctl_setperm(3),
       keyctl_describe(3),
       keyctl_clear(3),
       keyctl_link(3),
       keyctl_unlink(3),
       keyctl_search(3),
       keyctl_read(3),
       keyctl_instantiate(3),
       keyctl_negate(3),
       keyctl_set_reqkey_keyring(3),
       keyctl_assume_authority(3),
       keyctl_describe_alloc(3),
       keyctl_read_alloc(3),
       request-key(8)

Linux                                                               4 May 2006                                               KEYCTL_SET_TIMEOUT(3)