Merging upstream version 6.8.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 0 insertions, 298 deletions

diff --git a/man2/add_key.2 b/man2/add_key.2
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-.\" Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
-.\"     Written by David Howells (dhowells@redhat.com)
-.\" and Copyright (C) 2016 Michael Kerrisk <mtk.man-pages@gmail.com>
-.\"
-.\" SPDX-License-Identifier: GPL-2.0-or-later
-.\"
-.TH add_key 2 2024-02-25 "Linux man-pages 6.7"
-.SH NAME
-add_key \- add a key to the kernel's key management facility
-.SH LIBRARY
-Standard C library
-.RI ( libc ", " \-lc )
-.SH SYNOPSIS
-.nf
-.B #include <keyutils.h>
-.P
-.BI "key_serial_t add_key(const char *" type ", const char *" description ,
-.BI "                     const void " payload [. plen "], size_t " plen ,
-.BI "                     key_serial_t " keyring ");"
-.fi
-.P
-.IR Note :
-There is no glibc wrapper for this system call; see NOTES.
-.SH DESCRIPTION
-.BR add_key ()
-creates or updates a key of the given
-.I type
-and
-.IR description ,
-instantiates it with the
-.I payload
-of length
-.IR plen ,
-attaches it to the nominated
-.IR keyring ,
-and returns the key's serial number.
-.P
-The key may be rejected if the provided data is in the wrong format or
-it is invalid in some other way.
-.P
-If the destination
-.I keyring
-already contains a key that matches the specified
-.I type
-and
-.IR description ,
-then, if the key type supports it,
-.\" FIXME The aforementioned phrases begs the question:
-.\" which key types support this?
-that key will be updated rather than a new key being created;
-if not, a new key (with a different ID) will be created
-and it will displace the link to the extant key from the keyring.
-.\" FIXME Perhaps elaborate the implications here? Namely, the new
-.\" key will have a new ID, and if the old key was a keyring that
-.\" is consequently unlinked, then keys that it was anchoring
-.\" will have their reference count decreased by one (and may
-.\" consequently be garbage collected). Is this all correct?
-.P
-The destination
-.I keyring
-serial number may be that of a valid keyring for which the caller has
-.I write
-permission.
-Alternatively, it may be one of the following special keyring IDs:
-.\" FIXME . Perhaps have a separate page describing special keyring IDs?
-.TP
-.B KEY_SPEC_THREAD_KEYRING
-This specifies the caller's thread-specific keyring
-.RB ( thread\-keyring (7)).
-.TP
-.B KEY_SPEC_PROCESS_KEYRING
-This specifies the caller's process-specific keyring
-.RB ( process\-keyring (7)).
-.TP
-.B KEY_SPEC_SESSION_KEYRING
-This specifies the caller's session-specific keyring
-.RB ( session\-keyring (7)).
-.TP
-.B KEY_SPEC_USER_KEYRING
-This specifies the caller's UID-specific keyring
-.RB ( user\-keyring (7)).
-.TP
-.B KEY_SPEC_USER_SESSION_KEYRING
-This specifies the caller's UID-session keyring
-.RB ( user\-session\-keyring (7)).
-.SS Key types
-The key
-.I type
-is a string that specifies the key's type.
-Internally, the kernel defines a number of key types that are
-available in the core key management code.
-Among the types that are available for user-space use
-and can be specified as the
-.I type
-argument to
-.BR add_key ()
-are the following:
-.TP
-.I \[dq]keyring\[dq]
-Keyrings are special key types that may contain links to sequences of other
-keys of any type.
-If this interface is used to create a keyring, then
-.I payload
-should be NULL and
-.I plen
-should be zero.
-.TP
-.I \[dq]user\[dq]
-This is a general purpose key type whose payload may be read and updated
-by user-space applications.
-The key is kept entirely within kernel memory.
-The payload for keys of this type is a blob of arbitrary data
-of up to 32,767 bytes.
-.TP
-.IR \[dq]logon\[dq] " (since Linux 3.3)"
-.\" commit 9f6ed2ca257fa8650b876377833e6f14e272848b
-This key type is essentially the same as
-.IR \[dq]user\[dq] ,
-but it does not permit the key to read.
-This is suitable for storing payloads
-that you do not want to be readable from user space.
-.P
-This key type vets the
-.I description
-to ensure that it is qualified by a "service" prefix,
-by checking to ensure that the
-.I description
-contains a ':' that is preceded by other characters.
-.TP
-.IR \[dq]big_key\[dq] " (since Linux 3.13)"
-.\" commit ab3c3587f8cda9083209a61dbe3a4407d3cada10
-This key type is similar to
-.IR \[dq]user\[dq] ,
-but may hold a payload of up to 1\ MiB.
-If the key payload is large enough,
-then it may be stored encrypted in tmpfs
-(which can be swapped out) rather than kernel memory.
-.P
-For further details on these key types, see
-.BR keyrings (7).
-.SH RETURN VALUE
-On success,
-.BR add_key ()
-returns the serial number of the key it created or updated.
-On error, \-1 is returned and
-.I errno
-is set to indicate the error.
-.SH ERRORS
-.TP
-.B EACCES
-The keyring wasn't available for modification by the user.
-.TP
-.B EDQUOT
-The key quota for this user would be exceeded by creating this key or linking
-it to the keyring.
-.TP
-.B EFAULT
-One or more of
-.IR type ,
-.IR description ,
-and
-.I payload
-points outside process's accessible address space.
-.TP
-.B EINVAL
-The size of the string (including the terminating null byte) specified in
-.I type
-or
-.I description
-exceeded the limit (32 bytes and 4096 bytes respectively).
-.TP
-.B EINVAL
-The payload data was invalid.
-.TP
-.B EINVAL
-.I type
-was
-.I \[dq]logon\[dq]
-and the
-.I description
-was not qualified with a prefix string of the form
-.IR \[dq]service:\[dq] .
-.TP
-.B EKEYEXPIRED
-The keyring has expired.
-.TP
-.B EKEYREVOKED
-The keyring has been revoked.
-.TP
-.B ENOKEY
-The keyring doesn't exist.
-.TP
-.B ENOMEM
-Insufficient memory to create a key.
-.TP
-.B EPERM
-The
-.I type
-started with a period (\[aq].\[aq]).
-Key types that begin with a period are reserved to the implementation.
-.TP
-.B EPERM
-.I type
-was
-.I \[dq]keyring\[dq]
-and the
-.I description
-started with a period (\[aq].\[aq]).
-Keyrings with descriptions (names)
-that begin with a period are reserved to the implementation.
-.SH STANDARDS
-Linux.
-.SH HISTORY
-Linux 2.6.10.
-.SH NOTES
-glibc does not provide a wrapper for this system call.
-A wrapper is provided in the
-.I libkeyutils
-library.
-(The accompanying package provides the
-.I <keyutils.h>
-header file.)
-When employing the wrapper in that library, link with
-.IR \-lkeyutils .
-.SH EXAMPLES
-The program below creates a key with the type, description, and payload
-specified in its command-line arguments,
-and links that key into the session keyring.
-The following shell session demonstrates the use of the program:
-.P
-.in +4n
-.EX
-$ \fB./a.out user mykey "Some payload"\fP
-Key ID is 64a4dca
-$ \fBgrep \[aq]64a4dca\[aq] /proc/keys\fP
-064a4dca I\-\-Q\-\-\-    1 perm 3f010000  1000  1000 user    mykey: 12
-.EE
-.in
-.SS Program source
-\&
-.\" SRC BEGIN (add_key.c)
-.EX
-#include <keyutils.h>
-#include <stdint.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-\&
-int
-main(int argc, char *argv[])
-{
-    key_serial_t key;
-\&
-    if (argc != 4) {
-        fprintf(stderr, "Usage: %s type description payload\en",
-                argv[0]);
-        exit(EXIT_FAILURE);
-    }
-\&
-    key = add_key(argv[1], argv[2], argv[3], strlen(argv[3]),
-                  KEY_SPEC_SESSION_KEYRING);
-    if (key == \-1) {
-        perror("add_key");
-        exit(EXIT_FAILURE);
-    }
-\&
-    printf("Key ID is %jx\en", (uintmax_t) key);
-\&
-    exit(EXIT_SUCCESS);
-}
-.EE
-.\" SRC END
-.SH SEE ALSO
-.ad l
-.nh
-.BR keyctl (1),
-.BR keyctl (2),
-.BR request_key (2),
-.BR keyctl (3),
-.BR keyrings (7),
-.BR keyutils (7),
-.BR persistent\-keyring (7),
-.BR process\-keyring (7),
-.BR session\-keyring (7),
-.BR thread\-keyring (7),
-.BR user\-keyring (7),
-.BR user\-session\-keyring (7)
-.P
-The kernel source files
-.I Documentation/security/keys/core.rst
-and
-.I Documentation/keys/request\-key.rst
-(or, before Linux 4.13, in the files
-.\" commit b68101a1e8f0263dbc7b8375d2a7c57c6216fb76
-.I Documentation/security/keys.txt
-and
-.\" commit 3db38ed76890565772fcca3279cc8d454ea6176b
-.IR Documentation/security/keys\-request\-key.txt ).