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[PATCH] keys: Permit key expiry time to be set

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Add a new keyctl function that allows the expiry time to be set on a key or
removed from a key, provided the caller has attribute modification access.

Signed-off-by: David Howells <[email protected]>
Cc: Trond Myklebust <[email protected]>
Cc: Alexander Zangerl <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
David Howells 2006-01-08 01:02:43 -08:00 • committed by Linus Torvalds
commit 017679c4d4
5 changed files with 63 additions and 1 deletions
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15
Documentation/keys.txt
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@ -498,7 +498,7 @@ The keyctl syscall functions are:
keyring is full, error ENFILE will result.
The link procedure checks the nesting of the keyrings, returning ELOOP if
it appears to deep or EDEADLK if the link would introduce a cycle.
it appears too deep or EDEADLK if the link would introduce a cycle.
(*) Unlink a key or keyring from another keyring:
@ -628,6 +628,19 @@ The keyctl syscall functions are:
there is one, otherwise the user default session keyring.
(*) Set the timeout on a key.
long keyctl(KEYCTL_SET_TIMEOUT, key_serial_t key, unsigned timeout);
This sets or clears the timeout on a key. The timeout can be 0 to clear
the timeout or a number of seconds to set the expiry time that far into
the future.
The process must have attribute modification access on a key to set its
timeout. Timeouts may not be set with this function on negative, revoked
or expired keys.
===============
KERNEL SERVICES
===============