keyctl_join_session_keyring - join a different session keyring
#include <keyutils.h>
key_serial_t keyctl_join_session_keyring(const char *name);
keyctl_join_session_keyring() changes the session keyring to which a
process is subscribed.
If
name is
NULL then a new anonymous keyring will be created, and
the process will be subscribed to that.
If
name points to a string, then if a keyring of that name is available,
the process will attempt to subscribe to that keyring, giving an error if that
is not permitted; otherwise a new keyring of that name is created and attached
as the session keyring.
To attach to an extant named keyring, the keyring must have
search
permission available to the calling process.
On success
keyctl_join_session_keyring() returns the serial number of the
key it found or created. On error, the value
-1 will be returned and
errno will have been set to an appropriate error.
- ENOMEM
- Insufficient memory to create a key.
- EDQUOT
- The key quota for this user would be exceeded by creating
this key or linking it to the keyring.
- EACCES
- The named keyring exists, but is not searchable by
the calling process.
This is a library function that can be found in
libkeyutils. When
linking,
-lkeyutils should be specified to the linker.
keyctl(1),
add_key(2),
keyctl(2),
request_key(2),
keyctl(3),
keyrings(7),
keyutils(7),
session-keyring(7),
user-session-keyring(7)