THREAD-KEYRING(7) Linux Programmer's Manual THREAD-KEYRING(7)NAME
thread-keyring - per-thread keyring
DESCRIPTION
The thread keyring is a keyring used to anchor keys on behalf of a process. It is created only when a thread requests it. The thread
keyring has the name (description) _tid.
A special serial number value, KEY_SPEC_THREAD_KEYRING, is defined that can be used in lieu of the actual serial number of the calling
thread's thread keyring.
From the keyctl(1) utility, '@t' can be used instead of a numeric key ID in much the same way, but as keyctl(1) is a program run after
forking, this is of no utility.
Thread keyrings are not inherited across clone(2) and fork(2) and are cleared by execve(2). A thread keyring is destroyed when the thread
that refers to it terminates.
Initially, a thread does not have a thread keyring. If a thread doesn't have a thread keyring when it is accessed, then it will be created
if it is to be modified; otherwise the operation fails with the error ENOKEY.
SEE ALSO keyctl(1), keyctl(3), keyrings(7), persistent-keyring(7), process-keyring(7), session-keyring(7), user-keyring(7), user-session-keyring(7)Linux 2017-03-13 THREAD-KEYRING(7)
Check Out this Related Man Page
KEYCTL_CLEAR(3) Linux Key Management Calls KEYCTL_CLEAR(3)NAME
keyctl_clear - Clear a keyring
SYNOPSIS
#include <keyutils.h>
long keyctl_clear(key_serial_t keyring);
DESCRIPTION
keyctl_clear() clears the contents of a keyring.
The caller must have write permission on a keyring to be able clear it.
RETURN VALUE
On success keyctl_clear() returns 0. On error, the value -1 will be returned and errno will have been set to an appropriate error.
ERRORS
ENOKEY The keyring specified is invalid.
EKEYEXPIRED
The keyring specified has expired.
EKEYREVOKED
The keyring specified had been revoked.
EACCES The keyring exists, but is not writable 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_CLEAR(3)
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