Import X server from vnc-3.3.7.

[rdpsrv] / Xserver / lib / Xau / AuGetAddr.c

diff --git a/Xserver/lib/Xau/AuGetAddr.c b/Xserver/lib/Xau/AuGetAddr.c
new file mode 100644 (file)
index 0000000..ae0ad53
--- /dev/null
+++ b/Xserver/lib/Xau/AuGetAddr.c
@@ -0,0 +1,127 @@
+/* $XConsortium: AuGetAddr.c,v 1.13 94/04/17 20:15:43 rws Exp $ */
+
+/*
+
+Copyright (c) 1988  X Consortium
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+Except as contained in this notice, the name of the X Consortium shall not be
+used in advertising or otherwise to promote the sale, use or other dealings
+in this Software without prior written authorization from the X Consortium.
+
+*/
+
+#include <X11/Xauth.h>
+#include <X11/Xos.h>
+
+static
+binaryEqual (a, b, len)
+register char  *a, *b;
+register int   len;
+{
+    while (len--)
+       if (*a++ != *b++)
+           return 0;
+    return 1;
+}
+
+#if NeedFunctionPrototypes
+Xauth *
+XauGetAuthByAddr (
+#if NeedWidePrototypes
+unsigned int   family,
+unsigned int   address_length,
+#else
+unsigned short family,
+unsigned short address_length,
+#endif
+_Xconst char*  address,
+#if NeedWidePrototypes
+unsigned int   number_length,
+#else
+unsigned short number_length,
+#endif
+_Xconst char*  number,
+#if NeedWidePrototypes
+unsigned int   name_length,
+#else
+unsigned short name_length,
+#endif
+_Xconst char*  name)
+#else
+Xauth *
+XauGetAuthByAddr (family, address_length, address,
+                         number_length, number,
+                         name_length, name)
+unsigned short family;
+unsigned short address_length;
+char   *address;
+unsigned short number_length;
+char   *number;
+unsigned short name_length;
+char   *name;
+#endif
+{
+    FILE    *auth_file;
+    char    *auth_name;
+    Xauth   *entry;
+
+    auth_name = XauFileName ();
+    if (!auth_name)
+       return 0;
+    if (access (auth_name, R_OK) != 0)         /* checks REAL id */
+       return 0;
+    auth_file = fopen (auth_name, "rb");
+    if (!auth_file)
+       return 0;
+    for (;;) {
+       entry = XauReadAuth (auth_file);
+       if (!entry)
+           break;
+       /*
+        * Match when:
+        *   either family or entry->family are FamilyWild or
+        *    family and entry->family are the same
+        *  and
+        *   either address or entry->address are empty or
+        *    address and entry->address are the same
+        *  and
+        *   either number or entry->number are empty or
+        *    number and entry->number are the same
+        *  and
+        *   either name or entry->name are empty or
+        *    name and entry->name are the same
+        */
+
+       if ((family == FamilyWild || entry->family == FamilyWild ||
+            (entry->family == family &&
+             address_length == entry->address_length &&
+             binaryEqual (entry->address, address, (int)address_length))) &&
+           (number_length == 0 || entry->number_length == 0 ||
+            (number_length == entry->number_length &&
+             binaryEqual (entry->number, number, (int)number_length))) &&
+           (name_length == 0 || entry->name_length == 0 ||
+            (entry->name_length == name_length &&
+             binaryEqual (entry->name, name, (int)name_length))))
+           break;
+       XauDisposeAuth (entry);
+    }
+    (void) fclose (auth_file);
+    return entry;
+}