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      1 /*	$NetBSD: set_eugid.h,v 1.1.1.1 2009/06/23 10:09:00 tron Exp $	*/
      2 
      3 #ifndef _SET_EUGID_H_INCLUDED_
      4 #define _SET_EUGID_H_INCLUDED_
      5 
      6 /*++
      7 /* NAME
      8 /*	set_eugid 3h
      9 /* SUMMARY
     10 /*	set effective user and group attributes
     11 /* SYNOPSIS
     12 /*	#include <set_eugid.h>
     13 /* DESCRIPTION
     14 /* .nf
     15 
     16  /* External interface. */
     17 
     18 extern void set_eugid(uid_t, gid_t);
     19 
     20  /*
     21   * The following macros open and close a block that runs at a different
     22   * privilege level. To make mistakes with stray curly braces less likely, we
     23   * shape the macros below as the head and tail of a do-while loop.
     24   */
     25 #define SAVE_AND_SET_EUGID(uid, gid) do { \
     26 	uid_t __set_eugid_uid = geteuid(); \
     27 	gid_t __set_eugid_gid = getegid(); \
     28 	set_eugid((uid), (gid));
     29 
     30 #define RESTORE_SAVED_EUGID() \
     31 	set_eugid(__set_eugid_uid, __set_eugid_gid); \
     32     } while (0)
     33 
     34 /* LICENSE
     35 /* .ad
     36 /* .fi
     37 /*	The Secure Mailer license must be distributed with this software.
     38 /* AUTHOR(S)
     39 /*	Wietse Venema
     40 /*	IBM T.J. Watson Research
     41 /*	P.O. Box 704
     42 /*	Yorktown Heights, NY 10598, USA
     43 /*--*/
     44 
     45 #endif
     46