|
NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | SEE ALSO | COLOPHON |
|
|
|
getcon(3) SELinux API documentation getcon(3)
getcon, getprevcon, getpidcon - get SELinux security context of a
process
freecon, freeconary - free memory associated with SELinux
security contexts
getpeercon - get security context of a peer socket
setcon - set current security context of a process
#include <selinux/selinux.h>
int getcon(char **context);
int getcon_raw(char **context);
int getprevcon(char **context);
int getprevcon_raw(char **context);
int getpidcon(pid_t pid, char **context);
int getpidcon_raw(pid_t pid, char **context);
int getpeercon(int fd, char **context);
int getpeercon_raw(int fd, char **context);
void freecon(char *con);
void freeconary(char **con);
int setcon(char *context);
int setcon_raw(char *context);
getcon() retrieves the context of the current process, which must
be free'd with freecon.
getprevcon() same as getcon but gets the context before the last
exec.
getpidcon() returns the process context for the specified PID.
getpeercon() retrieves context of peer socket, and set *context
to refer to it, which must be free'd with freecon().
freecon() frees the memory allocated for a security context.
freeconary() frees the memory allocated for a context array.
If con is NULL, no operation is performed.
setcon() sets the current security context of the process to a
new value. Note that use of this function requires that the
entire application be trusted to maintain any desired separation
between the old and new security contexts, unlike exec-based
transitions performed via setexeccon(3). When possible,
decompose your application and use setexeccon(3) and execve(3)
instead.
Since access to file descriptors is revalidated upon use by
SELinux, the new context must be explicitly authorized in the
policy to use the descriptors opened by the old context if that
is desired. Otherwise, attempts by the process to use any
existing descriptors (including stdin, stdout, and stderr) after
performing the setcon() will fail.
A multi-threaded application can perform a setcon() prior to
creating any child threads, in which case all of the child
threads will inherit the new context. However, prior to Linux
2.6.28, setcon() would fail if there are any other threads
running in the same process since this would yield an
inconsistency among the security contexts of threads sharing the
same memory space. Since Linux 2.6.28, setcon() is permitted for
threads within a multi-threaded process if the new security
context is bounded by the old security context, where the bounded
relation is defined through typebounds statements in the policy
and guarantees that the new security context has a subset of the
permissions of the old security context.
If the process was being ptraced at the time of the setcon()
operation, ptrace permission will be revalidated against the new
context and the setcon() will fail if it is not allowed by
policy.
getcon_raw(), getprevcon_raw(), getpidcon_raw(), getpeercon_raw()
and setcon_raw() behave identically to their non-raw counterparts
but do not perform context translation.
On error -1 is returned. On success 0 is returned.
selinux(8), setexeccon(3)
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 2020-12-18. (At
that time, the date of the most recent commit that was found in
the repository was 2020-12-09.) 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
man-pages@man7.org
russell@coker.com.au 21 December 2011 getcon(3)
Pages that refer to this page: avc_context_to_sid(3), getexeccon(3), getfilecon(3), getfscreatecon(3), getkeycreatecon(3), get_ordered_context_list(3), getsockcreatecon(3), matchmediacon(3), matchpathcon(3), matchpathcon_checkmatches(3), security_class_to_string(3), security_compute_av(3), selabel_lookup(3), selabel_lookup_best_match(3), selinux_lsetfilecon_default(3), selinux_set_callback(3), setfilecon(3), set_matchpathcon_flags(3), selabel_db(5), selabel_file(5), selabel_media(5), selabel_x(5)
|
HTML rendering created 2020-12-21 by Michael Kerrisk, author of The Linux Programming Interface, maintainer of the Linux man-pages project. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
|