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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(char **context);

   int getexeccon_raw(char **context);

   int setexeccon(char * context);

   int setexeccon_raw(char * context);

   int setexecfilecon(const char *filename, const char *fallback_type);

   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
   explicitly 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.

   setexecfilecon()  sets  the  context  used for the next execve(2) call,
   based on the policy for the filename, and falling back to a new context
   with a fallback_type in case there is no transition.

   rpm_execcon() is deprecated; please use setexecfilecon() in conjunction
   with execve(2) in all new code. This function runs a helper for rpm  in
   an appropriate security context.  The verified parameter should contain
   the return code  from  the  signature  verification  (0  ==  ok,  1  ==
   notfound,  2 == verifyfail, 3 == nottrusted, 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 environment arrays.

RETURN VALUE

   On error -1 is returned.

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

SEE ALSO

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



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