avc_context_to_sid(3) SELinux API documentation avc_context_to_sid(3)
avc_context_to_sid, avc_sid_to_context, avc_get_initial_sid - obtain and manipulate SELinux security ID's
#include <selinux/selinux.h> #include <selinux/avc.h> int avc_context_to_sid(char *ctx, security_id_t *sid); int avc_sid_to_context(security_id_t sid, char **ctx); int avc_get_initial_sid(const char *name, security_id_t *sid);
Security ID's (SID's) are opaque representations of security contexts, managed by the userspace AVC. avc_context_to_sid() returns a SID for the given context in the memory referenced by sid. avc_sid_to_context() returns a copy of the context represented by sid in the memory referenced by ctx. The user must free the copy with freecon(3). avc_get_initial_sid() returns a SID for the kernel initial security identifier specified by name.
avc_context_to_sid() and avc_sid_to_context() return zero on success. On error, -1 is returned and errno is set appropriately.
ENOMEM An attempt to allocate memory failed.
As of libselinux version 2.0.86, SID's are no longer reference counted. A SID will be valid from the time it is first obtained until the next call to avc_destroy(3). The sidget(3) and sidput(3) functions, formerly used to adjust the reference count, are no-ops and are deprecated.
Eamon Walsh <email@example.com>
avc_init(3), avc_has_perm(3), avc_cache_stats(3), avc_add_callback(3), getcon(3), freecon(3), selinux(8)
This page is part of the selinux (Security-Enhanced Linux user- space libraries and tools) project. Information about the project can be found at ⟨https://github.com/SELinuxProject/selinux/wiki⟩. If you have a bug report for this manual page, see ⟨https://github.com/SELinuxProject/selinux/wiki/Contributing⟩. This page was obtained from the project's upstream Git repository ⟨https://github.com/SELinuxProject/selinux⟩ on 2023-06-23. (At that time, the date of the most recent commit that was found in the repository was 2023-05-11.) If you discover any rendering problems in this HTML version of the page, or you believe there is a better or more up-to-date source for the page, or you have corrections or improvements to the information in this COLOPHON (which is not part of the original manual page), send a mail to firstname.lastname@example.org 27 May 2004 avc_context_to_sid(3)
Pages that refer to this page: avc_add_callback(3), avc_cache_stats(3), avc_compute_create(3), avc_context_to_sid(3), avc_has_perm(3), avc_open(3)