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getcon(3)		   SELinux API documentation		     getcon(3)

NAME
       getcon,	getprevcon,  getpidcon	-  get	SELinux	 security context of a
       process.

       freecon, freeconary - free memory associated with SELinux security con‐
       texts.

       getpeercon - get security context of a peer socket.

       setcon - set current security context of a process.

SYNOPSIS
       #include <selinux/selinux.h>

       int getcon(security_context_t *context);

       int getprevcon(security_context_t *context);

       int getpidcon(pid_t pid, security_context_t *context);

       int getpeercon(int fd, security_context_t *context);

       void freecon(security_context_t con);

       void freeconary(security_context_t *con);

       int setcon(security_context_t 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 setexec‐
       con(3).	When possible, decompose your application and use setexeccon()
       and execve() 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.

RETURN VALUE
       On error -1 is returned.	 On success 0 is returned.

SEE ALSO
       selinux(8), setexeccon(3)

russell@coker.com.au	       21 December 2011			     getcon(3)
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