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getexeccon(3)		   SELinux API documentation		 getexeccon(3)

NAME
       getexeccon,  setexeccon	- get or set the SELinux security context used
       for executing a new process

       rpm_execcon - run a helper for rpm in an appropriate security context

SYNOPSIS
       #include <selinux/selinux.h>

       int getexeccon(security_context_t *context);

       int getexeccon_raw(security_context_t *context);

       int setexeccon(security_context_t context);

       int setexeccon_raw(security_context_t context);

       int rpm_execcon(unsigned	 int  verified,	 const	char  *filename,  char
       *const argv[] , char *const envp[]);

DESCRIPTION
       getexeccon()  retrieves	the  context used for executing a new process.
       This returned context should be	freed  with  freecon(3)	 if  non-NULL.
       getexeccon()  sets *context to NULL if no exec context has been explic‐
       itly set by the program (i.e. using the default policy behavior).

       setexeccon() sets the context used for the next execve(2)  call.	  NULL
       can  be passed to setexeccon() to reset to the default policy behavior.
       The exec context is automatically reset after the next execve(2), so  a
       program doesn't need to explicitly sanitize it upon startup.

       setexeccon()  can be applied prior to library functions that internally
       perform an execve(2), e.g.  execl*(3), execv*(3), popen(3), in order to
       set an exec context for that operation.

       getexeccon_raw()	 and setexeccon_raw() behave identically to their non-
       raw counterparts but do not perform context translation.

       Note: Signal handlers that perform an execve(2) must take care to save,
       reset, and restore the exec context to avoid unexpected behavior.

       rpm_execcon() runs a helper for rpm in an appropriate security context.
       The verified parameter should contain the return code from  the	signa‐
       ture  verification  (0 == ok, 1 == notfound, 2 == verifyfail, 3 == not‐
       trusted, 4 == nokey), although this information is not yet used by  the
       function.   The function determines the proper security context for the
       helper based on policy, sets the exec  context  accordingly,  and  then
       executes the specified filename with the provided argument and environ‐
       ment arrays.

RETURN VALUE
       On error -1 is returned.

       On success getexeccon() and setexeccon() returns 0.  rpm_execcon() only
       returns upon errors, as it calls execve(2).

SEE ALSO
       selinux(8), freecon(3), getcon(3)

russell@coker.com.au		1 January 2004			 getexeccon(3)
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