landlock_add_rule - Online Linux Manual PageSection : 2
Updated : 2023-02-10
Source : Linux man-pages 6.03
NAMElandlock_add_rule − add a new Landlock rule to a ruleset
LIBRARYStandard C library (libc, −lc)
SYNOPSIS#include <linux/landlock.h> /* Definition of LANDLOCK_* constants */
#include <sys/syscall.h> /* Definition of SYS_* constants */int syscall(SYS_landlock_add_rule, int ruleset_fd,
enum landlock_rule_type rule_type,
const void *rule_attr, uint32_t flags);
DESCRIPTIONA Landlock rule describes an action on an object. An object is currently a file hierarchy, and the related filesystem actions are defined with a set of access rights. This landlock_add_rule() system call enables adding a new Landlock rule to an existing ruleset created with landlock_create_ruleset(2). See landlock(7) for a global overview. ruleset_fd is a Landlock ruleset file descriptor obtained with landlock_create_ruleset(2). rule_type identifies the structure type pointed to by rule_attr. Currently, Linux supports the following rule_type value: LANDLOCK_RULE_PATH_BENEATH This defines the object type as a file hierarchy. In this case, rule_attr points to the following structure: struct landlock_path_beneath_attr {
__u64 allowed_access;
__s32 parent_fd;
} __attribute__((packed));allowed_access contains a bitmask of allowed filesystem actions for this file hierarchy (see Filesystem actions in landlock(7)). parent_fd is an opened file descriptor, preferably with the O_PATH flag, which identifies the parent directory of the file hierarchy or just a file. flags must be 0.
RETURN VALUEOn success, landlock_add_rule() returns 0.
ERRORSlandlock_add_rule() can failed for the following reasons: EOPNOTSUPP Landlock is supported by the kernel but disabled at boot time. EINVAL flags is not 0, or the rule accesses are inconsistent (i.e., rule_attr−>allowed_access is not a subset of the ruleset handled accesses). ENOMSG Empty accesses (i.e., rule_attr−>allowed_access is 0). EBADF ruleset_fd is not a file descriptor for the current thread, or a member of rule_attr is not a file descriptor as expected. EBADFD ruleset_fd is not a ruleset file descriptor, or a member of rule_attr is not the expected file descriptor type. EPERM ruleset_fd has no write access to the underlying ruleset. EFAULT rule_attr was not a valid address.
VERSIONSLandlock was added in Linux 5.13.
STANDARDSThis system call is Linux-specific.
EXAMPLESSee landlock(7).
SEE ALSOlandlock_create_ruleset(2), landlock_restrict_self(2), landlock(7) 0
Johanes Gumabo
Data Size : 10,697 byte
man-landlock_add_rule.2Build : 2024-12-05, 20:55 :
Visitor Screen : x
Visitor Counter ( page / site ) : 2 / 230,970
Visitor ID : :
Visitor IP : 3.21.244.240 :
Visitor Provider : AMAZON-02 :
Provider Position ( lat x lon ) : 39.962500 x -83.006100 : x
Provider Accuracy Radius ( km ) : 1000 :
Provider City : Columbus :
Provider Province : Ohio , : ,
Provider Country : United States :
Provider Continent : North America :
Visitor Recorder : Version :
Visitor Recorder : Library :
Online Linux Manual Page : Version : Online Linux Manual Page - Fedora.40 - march=x86-64 - mtune=generic - 24.12.05
Online Linux Manual Page : Library : lib_c - 24.10.03 - march=x86-64 - mtune=generic - Fedora.40
Online Linux Manual Page : Library : lib_m - 24.10.03 - march=x86-64 - mtune=generic - Fedora.40
Data Base : Version : Online Linux Manual Page Database - 24.04.13 - march=x86-64 - mtune=generic - fedora-38
Data Base : Library : lib_c - 23.02.07 - march=x86-64 - mtune=generic - fedora.36
Very long time ago, I have the best tutor, Wenzel Svojanovsky . If someone knows the email address of Wenzel Svojanovsky , please send an email to johanes_gumabo@yahoo.co.id .
If error, please print screen and send to johanes_gumabo@yahoo.co.id
Under development. Support me via PayPal.