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

lib/other/Makefile.in

@@ -44,6 +44,7 @@ libc_FILES=" \
 	getlogin.c \
 	getpagesize.c \
 	getpass.c \
+	getpeuid.c \
 	getpwent.c \
 	getttyent.c \
 	getw.c \

lib/other/getpeuid.c

@@ -0,0 +1,12 @@
+#include <lib.h>
+#include <unistd.h>
+
+PUBLIC uid_t getpeuid(ep)
+endpoint_t ep;
+{
+  message m;
+
+  m.m1_i1= ep;
+  if (_syscall(MM, GETPUID, &m) < 0) return ( (uid_t) -1);
+  return( (uid_t) m.m2_i1);
+}