getpeuid implementation. Get the uid of a process (by endpoint)

include/minix/callnr.h

@@ -95,6 +95,7 @@
 #if 0
 #define FREEMEM		106	/* to PM, not used, not implemented */
 #endif
+#define GETPUID		107	/* to PM: get the uid of a process (endpoint) */
 
 #define DEVCTL		120	/* to FS, map or unmap a device */
 #define TASK_REPLY	121	/* to FS: reply code from drivers, not 

include/unistd.h

@@ -198,6 +198,7 @@ _PROTOTYPE( int freemem, (phys_bytes size, phys_bytes base)		);
 #define unmapdriver(device) devctl(DEV_UNMAP, 0, device, 0)
 _PROTOTYPE( int devctl, (int ctl_req, int driver, int device, int style, 
 	int force)							);
+_PROTOTYPE( uid_t getpeuid, (endpoint_t ep)				);
 
 /* For compatibility with other Unix systems */
 _PROTOTYPE( int getpagesize, (void)					);