NAME¶
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
SYNOPSIS¶
#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);
DESCRIPTION¶
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,
setcon() will fail if there are any other threads
running in the same process.
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.
RETURN VALUE¶
On error -1 is returned. On success 0 is returned.
SEE ALSO¶
selinux(8),
setexeccon(3)
