#ifndef _SET_EUGID_H_INCLUDED_ #define _SET_EUGID_H_INCLUDED_ /*++ /* NAME /* set_eugid 3h /* SUMMARY /* set effective user and group attributes /* SYNOPSIS /* #include <set_eugid.h> /* DESCRIPTION /* .nf /* External interface. */ extern void set_eugid(uid_t, gid_t); /* * The following macros open and close a block that runs at a different * privilege level. To make mistakes with stray curly braces less likely, we * shape the macros below as the head and tail of a do-while loop. */ #define SAVE_AND_SET_EUGID(uid, gid) do { \ uid_t __set_eugid_uid = geteuid(); \ gid_t __set_eugid_gid = getegid(); \ set_eugid((uid), (gid)); #define RESTORE_SAVED_EUGID() \ set_eugid(__set_eugid_uid, __set_eugid_gid); \ } while (0) /* LICENSE /* .ad /* .fi /* The Secure Mailer license must be distributed with this software. /* AUTHOR(S) /* Wietse Venema /* IBM T.J. Watson Research /* P.O. Box 704 /* Yorktown Heights, NY 10598, USA /*--*/ #endif