1 files changed, 112 insertions, 0 deletions
diff --git a/libXau/AuGetAddr.c b/libXau/AuGetAddr.c
new file mode 100644
index 000000000..6275531be
--- /dev/null
+++ b/libXau/AuGetAddr.c
@@ -0,0 +1,112 @@
+/* $Xorg: AuGetAddr.c,v 1.4 2001/02/09 02:03:42 xorgcvs Exp $ */
+
+/*
+
+Copyright 1988, 1998  The Open Group
+
+Permission to use, copy, modify, distribute, and sell this software and its
+documentation for any purpose is hereby granted without fee, provided that
+the above copyright notice appear in all copies and that both that
+copyright notice and this permission notice appear in supporting
+documentation.
+
+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
+OPEN GROUP 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 Open Group 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 Open Group.
+
+*/
+/* $XFree86: xc/lib/Xau/AuGetAddr.c,v 1.5 2001/12/14 19:54:36 dawes Exp $ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include <X11/Xauth.h>
+#include <X11/Xos.h>
+
+static int
+binaryEqual (_Xconst char *a, _Xconst char *b, int len)
+{
+    while (len--)
+	if (*a++ != *b++)
+	    return 0;
+    return 1;
+}
+
+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)
+{
+    FILE    *auth_file;
+    char    *auth_name;
+    Xauth   *entry;
+
+    auth_name = XauFileName ();
+    if (!auth_name)
+	return NULL;
+    if (access (auth_name, R_OK) != 0)		/* checks REAL id */
+	return NULL;
+    auth_file = fopen (auth_name, "rb");
+    if (!auth_file)
+	return NULL;
+    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
+	 *     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;
+}