Part 2 of prior commit

1 files changed, 486 insertions, 0 deletions

diff --git a/tdm/backend/resource.c b/tdm/backend/resource.c
new file mode 100644
index 000000000..f17db78ec
--- /dev/null
+++ b/tdm/backend/resource.c
@@ -0,0 +1,486 @@
+/*
+
+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
+ *
+ * obtain configuration data
+ */
+
+#include "dm.h"
+#include "dm_error.h"
+
+#include <sys/stat.h>
+
+
+static char **originalArgv;
+
+static GProc getter;
+GTalk cnftalk;
+
+static void
+OpenGetter()
+{
+	GSet( &cnftalk );
+	if (!getter.pid) {
+		if (GOpen( &getter,
+		           originalArgv, "_config", 0, strdup( "config reader" ),
+		           0 ))
+			LogPanic( "Cannot run config reader\n" );
+		Debug( "getter now ready\n" );
+	}
+}
+
+void
+CloseGetter()
+{
+	if (getter.pid) {
+		GSet( &cnftalk );
+		(void)GClose (&getter, 0, 0);
+		Debug( "getter now closed\n" );
+	}
+}
+
+/*
+ * ref-counted, unique-instance strings
+ */
+static RcStr *strs;
+
+/*
+ * make a ref-counted string of the argument. the new string will
+ * have a ref-count of 1. the passed string pointer is no longer valid.
+ */
+RcStr *
+newStr( char *str )
+{
+	RcStr *cs;
+
+	for (cs = strs; cs; cs = cs->next)
+		if (!strcmp( str, cs->str )) {
+			free( str );
+			cs->cnt++;
+			return cs;
+		}
+	if (!(cs = Malloc( sizeof(*cs) )))
+		return 0;
+	cs->cnt = 1;
+	cs->str = str;
+	cs->next = strs;
+	strs = cs;
+	return cs;
+}
+
+/*
+ * decrement ref-count and delete string when count drops to 0.
+ */
+void
+delStr( RcStr *str )
+{
+	RcStr **cs;
+
+	if (!str || --str->cnt)
+		return;
+	for (cs = &strs; *cs; cs = &((*cs)->next))
+		if (str == *cs) {
+			*cs = (*cs)->next;
+			free( (*cs)->str );
+			free( *cs );
+			break;
+		}
+}
+
+
+typedef struct CfgFile {
+	RcStr *name;
+	int depidx;
+	long deptime;
+} CfgFile;
+
+static int numCfgFiles;
+static CfgFile *cfgFiles;
+
+static int cfgMapT[] = {
+	GC_gGlobal,
+	GC_gDisplay,
+#ifdef XDMCP
+	GC_gXaccess,
+#endif
+};
+static int cfgMap[as(cfgMapT)];
+
+static int
+GetDeps()
+{
+	int ncf, i, dep, ret;
+	CfgFile *cf;
+
+	OpenGetter();
+	GSendInt( GC_Files );
+	ncf = GRecvInt();
+	if (!(cf = Malloc( ncf * sizeof(*cf) ))) {
+		CloseGetter();
+		return 0;
+	}
+	for (i = 0; i < ncf; i++) {
+		cf[i].name = newStr( GRecvStr() );
+		if ((dep = cf[i].depidx = GRecvInt()) != -1)
+			cf[i].deptime = mTime( cf[dep].name->str );
+	}
+	if (cfgFiles) {
+		for (i = 0; i < numCfgFiles; i++)
+			delStr( cfgFiles[i].name );
+		free( cfgFiles );
+	}
+	ret = 1;
+	cfgFiles = cf;
+	numCfgFiles = ncf;
+	for (i = 0; i < as(cfgMapT); i++) {
+		GSendInt( cfgMapT[i] );
+		if ((cfgMap[i] = GRecvInt()) < 0) {
+			LogError( "Config reader does not support config cathegory %#x\n",
+			          cfgMapT[i] );
+			ret = 0;
+		}
+	}
+	GSendInt( -1 );
+	return ret;
+}
+
+static int
+checkDep( int idx )
+{
+	int dep;
+
+	if ((dep = cfgFiles[idx].depidx) == -1)
+		return 0;
+	if (checkDep( dep ))
+		return 1;
+	return mTime( cfgFiles[dep].name->str ) != cfgFiles[idx].deptime;
+}
+
+static int
+needsReScan( int what, CfgDep *dep )
+{
+	int widx, idx;
+	long mt;
+
+	for (widx = 0; cfgMapT[widx] != what; widx++);
+	idx = cfgMap[widx];
+	if (checkDep( idx )) {
+		if (!GetDeps())
+			return -1;
+		idx = cfgMap[widx];
+	}
+	mt = mTime( cfgFiles[idx].name->str );
+	if (dep->name != cfgFiles[idx].name) {
+		if (dep->name)
+			delStr( dep->name );
+		dep->name = cfgFiles[idx].name;
+		dep->name->cnt++;
+		dep->time = mt;
+		return 1;
+	} else if (dep->time != mt) {
+		dep->time = mt;
+		return 1;
+	} else
+		return 0;
+}
+
+int
+startConfig( int what, CfgDep *dep, int force )
+{
+	int ret;
+
+	if ((ret = needsReScan( what, dep )) < 0 || (!ret && !force))
+		return ret;
+	OpenGetter();
+	GSendInt( GC_GetConf );
+	GSendInt( what );
+	GSendStr( dep->name->str );
+	return 1;
+}
+
+static void
+LoadResources( CfgArr *conf )
+{
+	char **vptr, **pptr, *cptr;
+	long *iptr, i, id, nu, j, nptr, nint, nchr;
+
+	if (conf->data)
+		free( conf->data );
+	conf->numCfgEnt = GRecvInt();
+	nptr = GRecvInt();
+	nint = GRecvInt();
+	nchr = GRecvInt();
+	if (!(conf->data = Malloc( conf->numCfgEnt *
+	                             (sizeof(long) +
+	                              sizeof(char *)) +
+	                           nptr * sizeof(char *) +
+	                           nint * sizeof(long) +
+	                           nchr )))
+	{
+		CloseGetter();
+		return;
+	}
+	vptr = (char **)conf->data;
+	pptr = vptr + conf->numCfgEnt;
+	conf->idx = (long *)(pptr + nptr);
+	iptr = conf->idx + conf->numCfgEnt;
+	cptr = (char *)(iptr + nint);
+	for (i = 0; i < conf->numCfgEnt; i++) {
+		id = GRecvInt();
+		conf->idx[i] = id;
+		switch (id & C_TYPE_MASK) {
+		case C_TYPE_INT:
+			vptr[i] = (char *)((unsigned long)GRecvInt());
+			break;
+		case C_TYPE_STR:
+			vptr[i] = cptr;
+			cptr += GRecvStrBuf( cptr );
+			break;
+		case C_TYPE_ARGV:
+			nu = GRecvInt();
+			vptr[i] = (char *)pptr;
+			for (j = 0; j < nu; j++) {
+				*pptr++ = cptr;
+				cptr += GRecvStrBuf( cptr );
+			}
+			*pptr++ = (char *)0;
+			break;
+		default:
+			LogError( "Config reader supplied unknown data type in id %#x\n",
+			          id );
+			break;
+		}
+	}
+}
+
+static void
+ApplyResource( int id, char **src, char **dst )
+{
+	switch (id & C_TYPE_MASK) {
+	case C_TYPE_INT:
+		*(int *)dst = *(long *)src;
+		break;
+	case C_TYPE_STR:
+	case C_TYPE_ARGV:
+		*dst = *src;
+		break;
+	}
+}
+
+
+#define boffset(f) XtOffsetOf(struct display, f)
+
+/* no global variables exported currently
+struct globEnts {
+		int id;
+		char **off;
+} globEnt[] = {
+};
+ */
+
+/* no per-display variables exported currently
+struct dpyEnts {
+		int id;
+		int off;
+} dpyEnt[] = {
+};
+ */
+
+CfgArr cfg;
+
+char **
+FindCfgEnt( struct display *d, int id )
+{
+	int i;
+
+/* no global variables exported currently
+	for (i = 0; i < as(globEnt); i++)
+		if (globEnt[i].id == id)
+			return globEnt[i].off;
+ */
+	for (i = 0; i < cfg.numCfgEnt; i++)
+		if (cfg.idx[i] == id)
+			return ((char **)cfg.data) + i;
+	if (d) {
+/* no per-display variables exported currently
+		for (i = 0; i < as(dpyEnt); i++)
+			if (dpyEnt[i].id == id)
+				return (char **)(((char *)d) + dpyEnt[i].off);
+ */
+		for (i = 0; i < d->cfg.numCfgEnt; i++)
+			if (d->cfg.idx[i] == id)
+				return ((char **)d->cfg.data) + i;
+	}
+	Debug( "unknown config entry %#x requested\n", id );
+	return (char **)0;
+}
+
+
+CONF_CORE_GLOBAL_DEFS
+
+struct globVals {
+		int id;
+		char **off;
+} globVal[] = {
+CONF_CORE_GLOBALS
+};
+
+int
+LoadDMResources( int force )
+{
+	int i, ret;
+	char **ent;
+
+	if (Setjmp( cnftalk.errjmp ))
+		return -1; /* may memleak, but we probably have to abort anyway */
+	if ((ret = startConfig( GC_gGlobal, &cfg.dep, force )) <= 0)
+		return ret;
+	LoadResources( &cfg );
+/*	Debug( "manager resources: %[*x\n",
+           cfg.numCfgEnt, ((char **)cfg.data) + cfg.numCfgEnt );*/
+	ret = 1;
+	for (i = 0; i < as(globVal); i++) {
+		if (!(ent = FindCfgEnt( 0, globVal[i].id )))
+			ret = -1;
+		else
+			ApplyResource( globVal[i].id, ent, globVal[i].off );
+	}
+	if (ret < 0)
+		LogError( "Internal error: config reader supplied incomplete data\n" );
+	return ret;
+}
+
+
+struct dpyVals {
+		int id;
+		int off;
+} dpyVal[] = {
+CONF_CORE_LOCALS
+};
+
+int
+LoadDisplayResources( struct display *d )
+{
+	int i, ret;
+	char **ent;
+
+	if (Setjmp( cnftalk.errjmp ))
+		return -1; /* may memleak */
+	if ((ret = startConfig( GC_gDisplay, &d->cfg.dep, FALSE )) <= 0)
+		return ret;
+	GSendStr( d->name );
+	GSendStr( d->class2 );
+	LoadResources( &d->cfg );
+/*	Debug( "display(%s, %s) resources: %[*x\n", d->name, d->class2,
+           d->cfg.numCfgEnt, ((char **)d->cfg.data) + d->cfg.numCfgEnt );*/
+	ret = 1;
+	for (i = 0; i < as(dpyVal); i++) {
+		if (!(ent = FindCfgEnt( d, dpyVal[i].id )))
+			ret = -1;
+		else
+			ApplyResource( dpyVal[i].id, ent,
+			               (char **)(((char *)d) + dpyVal[i].off) );
+	}
+	if (ret < 0)
+		LogError( "Internal error: config reader supplied incomplete data\n" );
+	return ret;
+}
+
+int
+InitResources( char **argv )
+{
+	originalArgv = argv;
+	cnftalk.pipe = &getter.pipe;
+	if (Setjmp( cnftalk.errjmp ))
+		return 0; /* may memleak */
+	return GetDeps();
+}
+
+static void
+addServers( char **srv, int bType )
+{
+	char *name, *class2;
+	const char *dtx, *cls;
+	struct display *d;
+
+	for (; *srv; srv++) {
+		if ((cls = strchr( *srv, '_' ))) {
+			if (!StrNDup( &name, *srv, cls - *srv ))
+				return;
+			if (!StrDup( &class2, cls )) {
+				free( name );
+				return;
+			}
+		} else {
+			if (!StrDup( &name, *srv ))
+				return;
+			class2 = 0;
+		}
+		if ((d = FindDisplayByName( name ))) {
+			if (d->class2)
+				free( d->class2 );
+			dtx = "existing";
+		} else {
+			if (!(d = NewDisplay( name ))) {
+				free( name );
+				if (class2)
+					free( class2 );
+				return;
+			}
+			dtx = "new";
+		}
+		d->stillThere = 1;
+		d->class2 = class2;
+		d->displayType = (*name == ':' ? dLocal : dForeign) | bType;
+		if ((bType & d_lifetime) == dReserve) {
+			if (d->status == notRunning)
+				d->status = reserve;
+		} else {
+			if (d->status == reserve)
+				d->status = notRunning;
+		}
+		Debug( "found %s %s%s display: %s %s\n", dtx,
+		       ((d->displayType & d_location) == dLocal) ? "local" : "foreign",
+		       ((d->displayType & d_lifetime) == dReserve) ? " reserve" : "",
+		       d->name, d->class2 );
+		free( name );
+	}
+}
+
+void
+ScanServers( void )
+{
+	Debug( "ScanServers\n" );
+	addServers( staticServers, dFromFile | dPermanent );
+	addServers( reserveServers, dFromFile | dReserve );
+}
+