Part 2 of prior commit

1 files changed, 294 insertions, 0 deletions

diff --git a/tdm/backend/dpylist.c b/tdm/backend/dpylist.c
new file mode 100644
index 000000000..b512293f7
--- /dev/null
+++ b/tdm/backend/dpylist.c
@@ -0,0 +1,294 @@
+/*
+
+Copyright 1988, 1998  The Open Group
+Copyright 2000-2005 Oswald Buddenhagen <[email protected]>
+
+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 COPYRIGHT HOLDERS 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 a copyright holder 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 copyright holder.
+
+*/
+
+/*
+ * xdm - display manager daemon
+ * Author: Keith Packard, MIT X Consortium
+ *
+ * a simple linked list of known displays
+ */
+
+#include "dm.h"
+#include "dm_error.h"
+
+struct display *displays;
+static struct disphist *disphist;
+
+int
+AnyDisplaysLeft( void )
+{
+	return displays != (struct display *)0;
+}
+
+int
+AnyActiveDisplays( void )
+{
+	struct display *d;
+
+	for (d = displays; d; d = d->next)
+		if (d->status == remoteLogin || d->userSess >= 0)
+			return 1;
+	return 0;
+}
+
+int
+AnyRunningDisplays( void )
+{
+	struct display *d;
+
+	for (d = displays; d; d = d->next)
+		switch (d->status) {
+		case notRunning:
+		case textMode:
+		case reserve:
+			break;
+		default:
+			return 1;
+		}
+	return 0;
+}
+
+int
+AnyReserveDisplays( void )
+{
+	struct display *d;
+
+	for (d = displays; d; d = d->next)
+		if ((d->displayType & d_lifetime) == dReserve)
+			return 1;
+	return 0;
+}
+
+int
+idleReserveDisplays( void )
+{
+	struct display *d;
+	int cnt = 0;
+
+	for (d = displays; d; d = d->next)
+		if (d->status == reserve)
+			cnt++;
+	return cnt;
+}
+
+int
+StartReserveDisplay( int lt )
+{
+	struct display *d, *rd;
+
+	for (rd = 0, d = displays; d; d = d->next)
+		if (d->status == reserve)
+			rd = d;
+	if (rd) {
+		rd->idleTimeout = lt;
+		rd->status = notRunning;
+		return 1;
+	}
+	return 0;
+}
+
+void
+ForEachDisplay( void (*f)( struct display * ) )
+{
+	struct display *d, *next;
+
+	for (d = displays; d; d = next) {
+		next = d->next;
+		(*f)( d );
+	}
+}
+
+#ifdef HAVE_VTS
+static void
+_forEachDisplayRev( struct display *d, void (*f)( struct display * ) )
+{
+	if (d) {
+		if (d->next)
+			_forEachDisplayRev( d->next, f );
+		(*f)( d );
+	}
+}
+
+void
+ForEachDisplayRev( void (*f)( struct display * ) )
+{
+	_forEachDisplayRev( displays, f );
+}
+#endif
+
+struct display *
+FindDisplayByName( const char *name )
+{
+	struct display *d;
+
+	for (d = displays; d; d = d->next)
+		if (!strcmp( name, d->name ))
+			return d;
+	return 0;
+}
+
+struct display *
+FindDisplayByPid( int pid )
+{
+	struct display *d;
+
+	for (d = displays; d; d = d->next)
+		if (pid == d->pid)
+			return d;
+	return 0;
+}
+
+struct display *
+FindDisplayByServerPid( int serverPid )
+{
+	struct display *d;
+
+	for (d = displays; d; d = d->next)
+		if (serverPid == d->serverPid)
+			return d;
+	return 0;
+}
+
+#ifdef XDMCP
+
+struct display *
+FindDisplayBySessionID( CARD32 sessionID )
+{
+	struct display *d;
+
+	for (d = displays; d; d = d->next)
+		if (sessionID == d->sessionID)
+			return d;
+	return 0;
+}
+
+struct display *
+FindDisplayByAddress( XdmcpNetaddr addr, int addrlen, CARD16 displayNumber )
+{
+	struct display *d;
+
+	for (d = displays; d; d = d->next)
+		if ((d->displayType & d_origin) == dFromXDMCP &&
+		    d->displayNumber == displayNumber &&
+		    addressEqual( (XdmcpNetaddr)d->from.data, d->from.length,
+		                  addr, addrlen ))
+			return d;
+	return 0;
+}
+
+#endif /* XDMCP */
+
+#define IfFree(x)  if (x) free( (char *)x )
+
+void
+RemoveDisplay( struct display *old )
+{
+	struct display *d, **dp;
+	int i;
+
+	for (dp = &displays; (d = *dp); dp = &(*dp)->next) {
+		if (d == old) {
+			Debug( "Removing display %s\n", d->name );
+			*dp = d->next;
+			IfFree( d->class2 );
+			IfFree( d->cfg.data );
+			delStr( d->cfg.dep.name );
+#ifdef XDMCP
+			IfFree( d->remoteHost );
+#endif
+			if (d->authorizations) {
+				for (i = 0; i < d->authNum; i++)
+					XauDisposeAuth( d->authorizations[i] );
+				free( (char *)d->authorizations );
+			}
+			if (d->authFile) {
+				(void)unlink( d->authFile );
+				free( d->authFile );
+			}
+			IfFree( d->authNameLens );
+#ifdef XDMCP
+			XdmcpDisposeARRAY8( &d->peer );
+			XdmcpDisposeARRAY8( &d->from );
+			XdmcpDisposeARRAY8( &d->clientAddr );
+#endif
+			free( (char *)d );
+			break;
+		}
+	}
+}
+
+static struct disphist *
+FindHist( const char *name )
+{
+	struct disphist *hstent;
+
+	for (hstent = disphist; hstent; hstent = hstent->next)
+		if (!strcmp( hstent->name, name ))
+			return hstent;
+	return 0;
+}
+
+struct display *
+NewDisplay( const char *name )
+{
+	struct display *d;
+	struct disphist *hstent;
+
+	if (!(hstent = FindHist( name ))) {
+		if (!(hstent = Calloc( 1, sizeof(*hstent) )))
+			return 0;
+		if (!StrDup( &hstent->name, name )) {
+			free( hstent );
+			return 0;
+		}
+		hstent->next = disphist; disphist = hstent;
+	}
+
+	if (!(d = (struct display *)Calloc( 1, sizeof(*d) )))
+		return 0;
+	d->next = displays;
+	d->hstent = hstent;
+	d->name = hstent->name;
+	/* initialize fields (others are 0) */
+	d->pid = -1;
+	d->serverPid = -1;
+	d->ctrl.fd = -1;
+	d->ctrl.fifo.fd = -1;
+	d->pipe.rfd = -1;
+	d->pipe.wfd = -1;
+	d->gpipe.rfd = -1;
+	d->gpipe.wfd = -1;
+	d->userSess = -1;
+#ifdef XDMCP
+	d->xdmcpFd = -1;
+#endif
+	displays = d;
+	Debug( "created new display %s\n", d->name );
+	return d;
+}