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 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- The specified key has been revoked.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),
keyutils(7),
keyrings(7)