sync code with last improvements from OpenBSD

app/xenodm/include/greet.h

@@ -0,0 +1,69 @@
+/*
+
+Copyright 1994, 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.
+
+*/
+
+/*
+ * greet.h - interface to xdm's dynamically-loadable modular greeter
+ */
+#include <pwd.h>
+#include <X11/Xlib.h>
+
+/*
+ * Return values for GreetUser();
+ * Values must be explicitly defined because the greet library
+ * may come from a different vendor.
+ * Negative values indicate an error.
+ */
+typedef enum {
+    Greet_Session_Over = 0,	/* session managed and over */
+    Greet_Success = 1,		/* greet succeeded, session not managed */
+    Greet_Failure = -1		/* greet failed */
+} greet_user_rtn;
+
+/*
+ * GreetUser can either handle the user's session or allow xdm to do it.
+ * The return or exit status of GreetUser indicates to xdm whether it
+ * should start a session.
+ *
+ * GreetUser is passed the xdm struct display pointer, a pointer to a
+ * Display, and pointers to greet and verify structs.  If it expects xdm
+ * to run the session, it fills in the Display pointer and the fields
+ * of the greet and verify structs.
+ *
+ * The verify struct includes the uid, gid, arguments to run the session,
+ * environment for the session, and environment for startup/reset.
+ *
+ * The greet struct includes the user's name and password but these are
+ * really only needed if xdm is compiled with a user-based authorization
+ * option such as SECURE_RPC or K5AUTH.
+ */
+
+extern greet_user_rtn GreetUser(struct display *,
+    struct verify_info *, struct greet_info *);
+
+extern greet_user_rtn AutoLogin(struct display *,
+    struct verify_info *, struct greet_info *);