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

NAME         top

       keyctl_set_timeout - set the expiration timer on a key

SYNOPSIS         top

       #include <keyutils.h>

       long keyctl_set_timeout(key_serial_t key, unsigned timeout);

DESCRIPTION         top

       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         top

       On success keyctl_set_timeout() returns 0 .  On error, the value -1
       will be returned and errno will have been set to an appropriate

ERRORS         top

       ENOKEY The specified key does not exist.

              The specified key has already expired.

              The specified key has been revoked.

       EACCES The named key exists, but does not grant setattr permission to
              the calling process.

LINKING         top

       This is a library function that can be found in libkeyutils.  When
       linking, -lkeyutils should be specified to the linker.

SEE ALSO         top

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

COLOPHON         top

       This page is part of the keyutils (key management utilities) project.
       Information about the project can be found at [unknown -- if you
       know, please contact] If you have a bug report for
       this manual page, send it to  This page was
       obtained from the project's upstream Git repository 
       on 2017-03-13.  If you discover any rendering problems in this HTML
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       manual page), send a mail to

Linux                            4 May 2006            KEYCTL_SET_TIMEOUT(3)