move krb5_sete[ug]id from libkrb5util (fn) to k5-util.h (macro)

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@14569 dc483132-0cff-0310-8789-dd5450dbe970

3 files changed, 54 insertions, 5 deletions

diff --git a/src/include/ChangeLog b/src/include/ChangeLog
index c6aebe9d5..0d0e2514e 100644
--- a/src/include/ChangeLog
+++ b/src/include/ChangeLog
@@ -1,3 +1,13 @@
+2002-06-25  Ken Raeburn  <raeburn@mit.edu>
+
+	* configure.in: Check for seteuid, setresuid, setreuid, setegid,
+	setresgid and setregid.
+	* k5-util.h: Include sys/types.h, unistd.h, and stdlib.h if
+	available; include krb5/autoconf.h and errno.h always.
+	(krb5_seteuid, krb5_setegid): Replace function declarations with
+	macro definitions.
+	(krb5_setedid): Delete declaration of non-existent function.
+
 2002-06-24  Ken Raeburn  <raeburn@mit.edu>
 
 	* port-sockets.h (win_socket_initialize): Delete declaration,
diff --git a/src/include/configure.in b/src/include/configure.in
index a702a2acc..16117afe7 100644
--- a/src/include/configure.in
+++ b/src/include/configure.in
@@ -5,7 +5,7 @@ AC_PROG_INSTALL
 AC_PROG_AWK
 AC_PROG_LEX
 AC_C_CONST
-AC_CHECK_FUNCS(strdup labs setvbuf memmove bcopy inet_ntoa inet_aton gethostbyname_r gethostbyaddr_r getservbyname_r getservbyport_r)
+AC_CHECK_FUNCS(strdup labs setvbuf memmove bcopy inet_ntoa inet_aton gethostbyname_r gethostbyaddr_r getservbyname_r getservbyport_r seteuid setresuid setreuid setegid setresgid setregid)
 dnl
 dnl Check what the return types for gethostbyname_r and getservbyname_r are.
 dnl
diff --git a/src/include/k5-util.h b/src/include/k5-util.h
index e4d49d96e..4f0c6f73f 100644
--- a/src/include/k5-util.h
+++ b/src/include/k5-util.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 1989-1998 by the Massachusetts Institute of Technology,
+ * Copyright (C) 1989-1998,2002 by the Massachusetts Institute of Technology,
  * Cambridge, MA, USA.  All Rights Reserved.
  * 
  * This software is being provided to you, the LICENSEE, by the 
@@ -44,9 +44,48 @@
  * They live in libkrb5util.
  */
 
-int krb5_seteuid(int);
-int krb5_setedid(int);
-int krb5_setegid(int);
+#include "krb5/autoconf.h"
+
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+
+#include <errno.h>
+
+#ifndef krb5_seteuid
+
+#if defined(HAVE_SETEUID)
+#  define krb5_seteuid(EUID)	(seteuid((uid_t)(EUID)))
+#elif defined(HAVE_SETRESUID)
+#  define krb5_seteuid(EUID)	setresuid(getuid(), (uid_t)(EUID), geteuid())
+#elif defined(HAVE_SETREUID)
+#  define krb5_seteuid(EUID)	setreuid(geteuid(), (uid_t)(EUID))
+#else
+   /* You need to add a case to deal with this operating system.*/
+#  define krb5_seteuid(EUID)	(errno = EPERM, -1)
+#endif
+
+#ifdef HAVE_SETEGID
+#  define krb5_setegid(EGID)	(setegid((gid_t)(EGID)))
+#elif defined(HAVE_SETRESGID)
+#  define krb5_setegid(EGID)	(setresgid(getgid(), (gid_t)(EGID), getegid()))
+#elif defined(HAVE_SETREGID)
+#  define krb5_setegid(EGID)	(setregid(getegid(), (gid_t)(EGID)))
+#else
+   /* You need to add a case to deal with this operating system.*/
+#  define krb5_setegid(EGID)	(errno = EPERM, -1)
+#endif
+
+#endif
+
 
 #if defined(KRB_DEFS) && defined(SOCK_DGRAM)
 krb5_error_code krb5_compat_recvauth(krb5_context, krb5_auth_context *,