Need getpeereid.c

diff --git a/libraries/liblutil/getpeereid.c b/libraries/liblutil/getpeereid.c
new file mode 100644 (file)
index 0000000..f8f6e22
--- /dev/null
+++ b/libraries/liblutil/getpeereid.c
@@ -0,0 +1,84 @@
+/* getpeereid.c */
+/* $OpenLDAP$ */
+/*
+ * Copyright 1998-2003 The OpenLDAP Foundation, All Rights Reserved.
+ * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
+ */
+
+#include "portable.h"
+
+#ifndef HAVE_GETPEEREID
+
+#include <sys/types.h>
+#include <ac/unistd.h>
+
+#include <ac/socket.h>
+
+#if HAVE_SYS_UCRED_H
+#include <sys/ucred.h>
+#endif
+
+#if !defined(SO_PEERCRED) && !defined(LOCAL_PEERCRED) && defined(HAVE_SENDMSG)
+#define DO_SENDMSG
+#include <sys/stat.h>
+#endif
+
+int getpeereid( int s, uid_t *euid, gid_t *egid )
+{
+#ifdef LDAP_PF_LOCAL
+#if defined( SO_PEERCRED )
+       struct ucred peercred;
+       size_t peercredlen = sizeof peercred;
+
+       if(( getsockopt( s, SOL_SOCKET, SO_PEERCRED,
+               (void *)&peercred, &peercredlen ) == 0 )
+               && ( peercredlen == sizeof peercred ))
+       {
+               *euid = peercred.uid;
+               *egid = peercred.gid;
+               return 0;
+       }
+
+#elif defined( LOCAL_PEERCRED )
+       struct xucred peercred;
+       socklen_t peercredlen = sizeof peercred;
+
+       if(( getsockopt( s, LOCAL_PEERCRED, 1,
+               (void *)&peercred, &peercredlen ) == 0 )
+               && ( peercred.cr_version == XUCRED_VERSION ))
+       {
+               *euid = peercred.cr_uid;
+               *egid = peercred.cr_gid;
+               return 0;
+       }
+#elif defined( DO_SENDMSG )
+       int dummy, fd[2];
+       struct iovec iov = {(char *)&dummy, sizeof(dummy)};
+       struct msghdr msg = {0};
+       struct stat st;
+       msg.msg_iov = &iov;
+       msg.msg_iovlen = 1;
+       msg.msg_accrights = (char *)fd;
+       msg.msg_accrightslen = sizeof(fd);
+       if( recvmsg( s, &msg, 0) >= 0 && msg.msg_accrightslen == sizeof(int) )
+       {
+               /* We must receive a valid descriptor, it must be a pipe,
+                * and it must only be accessible by its owner.
+                */
+               dummy = fstat( fd[0], &st );
+               close(fd[0]);
+               if( dummy == 0 && S_ISFIFO(st.st_mode) &&
+                       ((st.st_mode & (S_IRWXG|S_IRWXO)) == 0))
+               {
+                       *euid = st.st_uid;
+                       *egid = st.st_gid;
+                       return 0;
+               }
+       }
+#endif
+#endif
+
+       return -1;
+}
+
+#endif