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CentOS 7.0 - man page for keyctl_join_session_keyring (centos section 3)

KEYCTL_JOIN_SESSION_KEYRING(3)		      Linux Key Management Calls	       KEYCTL_JOIN_SESSION_KEYRING(3)

NAME
keyctl_join_session_keyring - Join a different session keyring
SYNOPSIS
#include <keyutils.h> key_serial_t keyctl_join_session_keyring(const char *name);
DESCRIPTION
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.
RETURN VALUE
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.
ERRORS
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.
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), request-key(8) Linux 4 May 2006 KEYCTL_JOIN_SESSION_KEYRING(3)


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